Git 2.16-rc0
[git/git.git] / remote.c
CommitLineData
5751f490 1#include "cache.h"
b2141fc1 2#include "config.h"
5751f490
DB
3#include "remote.h"
4#include "refs.h"
6d21bf96
JH
5#include "commit.h"
6#include "diff.h"
7#include "revision.h"
8ca12c0d 8#include "dir.h"
ec8452d5 9#include "tag.h"
73cf0822 10#include "string-list.h"
ed81c76b 11#include "mergesort.h"
0b282cc4 12#include "argv-array.h"
5751f490 13
6ddba5e2
FC
14enum map_direction { FROM_SRC, FROM_DST };
15
e0aaa29f
DB
16static struct refspec s_tag_refspec = {
17 0,
18 1,
b84c343c 19 0,
6e7b66ee 20 0,
08fbdb30
DB
21 "refs/tags/*",
22 "refs/tags/*"
e0aaa29f
DB
23};
24
25const struct refspec *tag_refspec = &s_tag_refspec;
26
844112ca
JH
27struct counted_string {
28 size_t len;
29 const char *s;
30};
55029ae4
DB
31struct rewrite {
32 const char *base;
844112ca
JH
33 size_t baselen;
34 struct counted_string *instead_of;
55029ae4
DB
35 int instead_of_nr;
36 int instead_of_alloc;
37};
d071d942
JT
38struct rewrites {
39 struct rewrite **rewrite;
40 int rewrite_alloc;
41 int rewrite_nr;
42};
55029ae4 43
5751f490 44static struct remote **remotes;
2d31347b
DB
45static int remotes_alloc;
46static int remotes_nr;
d0da003d 47static struct hashmap remotes_hash;
5751f490 48
cf818348 49static struct branch **branches;
2d31347b
DB
50static int branches_alloc;
51static int branches_nr;
cf818348
DB
52
53static struct branch *current_branch;
f24f715e 54static const char *pushremote_name;
cf818348 55
d071d942 56static struct rewrites rewrites;
1c2eafb8 57static struct rewrites rewrites_push;
55029ae4 58
0a4da29d
DB
59static int valid_remote(const struct remote *remote)
60{
c578f51d 61 return (!!remote->url) || (!!remote->foreign_vcs);
0a4da29d
DB
62}
63
d071d942 64static const char *alias_url(const char *url, struct rewrites *r)
55029ae4
DB
65{
66 int i, j;
844112ca
JH
67 struct counted_string *longest;
68 int longest_i;
69
70 longest = NULL;
71 longest_i = -1;
d071d942
JT
72 for (i = 0; i < r->rewrite_nr; i++) {
73 if (!r->rewrite[i])
55029ae4 74 continue;
d071d942 75 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
59556548 76 if (starts_with(url, r->rewrite[i]->instead_of[j].s) &&
844112ca 77 (!longest ||
d071d942
JT
78 longest->len < r->rewrite[i]->instead_of[j].len)) {
79 longest = &(r->rewrite[i]->instead_of[j]);
844112ca 80 longest_i = i;
55029ae4
DB
81 }
82 }
83 }
844112ca
JH
84 if (!longest)
85 return url;
86
75faa45a 87 return xstrfmt("%s%s", r->rewrite[longest_i]->base, url + longest->len);
55029ae4
DB
88}
89
5751f490
DB
90static void add_push_refspec(struct remote *remote, const char *ref)
91{
2d31347b
DB
92 ALLOC_GROW(remote->push_refspec,
93 remote->push_refspec_nr + 1,
94 remote->push_refspec_alloc);
95 remote->push_refspec[remote->push_refspec_nr++] = ref;
5751f490
DB
96}
97
5d46c9d4
DB
98static void add_fetch_refspec(struct remote *remote, const char *ref)
99{
2d31347b
DB
100 ALLOC_GROW(remote->fetch_refspec,
101 remote->fetch_refspec_nr + 1,
102 remote->fetch_refspec_alloc);
103 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
5d46c9d4
DB
104}
105
28b91f8a 106static void add_url(struct remote *remote, const char *url)
5751f490 107{
2d31347b
DB
108 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
109 remote->url[remote->url_nr++] = url;
5751f490
DB
110}
111
20346234
MG
112static void add_pushurl(struct remote *remote, const char *pushurl)
113{
114 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
115 remote->pushurl[remote->pushurl_nr++] = pushurl;
116}
117
1c2eafb8
JT
118static void add_pushurl_alias(struct remote *remote, const char *url)
119{
120 const char *pushurl = alias_url(url, &rewrites_push);
121 if (pushurl != url)
122 add_pushurl(remote, pushurl);
123}
124
125static void add_url_alias(struct remote *remote, const char *url)
126{
127 add_url(remote, alias_url(url, &rewrites));
128 add_pushurl_alias(remote, url);
129}
130
d0da003d
PR
131struct remotes_hash_key {
132 const char *str;
133 int len;
134};
135
7663cdc8 136static int remotes_hash_cmp(const void *unused_cmp_data,
45dcb35f
SB
137 const void *entry,
138 const void *entry_or_key,
139 const void *keydata)
d0da003d 140{
45dcb35f
SB
141 const struct remote *a = entry;
142 const struct remote *b = entry_or_key;
143 const struct remotes_hash_key *key = keydata;
144
d0da003d
PR
145 if (key)
146 return strncmp(a->name, key->str, key->len) || a->name[key->len];
147 else
148 return strcmp(a->name, b->name);
149}
150
151static inline void init_remotes_hash(void)
152{
153 if (!remotes_hash.cmpfn)
45dcb35f 154 hashmap_init(&remotes_hash, remotes_hash_cmp, NULL, 0);
d0da003d
PR
155}
156
5751f490
DB
157static struct remote *make_remote(const char *name, int len)
158{
d0da003d
PR
159 struct remote *ret, *replaced;
160 struct remotes_hash_key lookup;
161 struct hashmap_entry lookup_entry;
5751f490 162
d0da003d
PR
163 if (!len)
164 len = strlen(name);
165
166 init_remotes_hash();
167 lookup.str = name;
168 lookup.len = len;
169 hashmap_entry_init(&lookup_entry, memhash(name, len));
170
171 if ((ret = hashmap_get(&remotes_hash, &lookup_entry, &lookup)) != NULL)
172 return ret;
5751f490 173
2d31347b 174 ret = xcalloc(1, sizeof(struct remote));
737c5a9c 175 ret->prune = -1; /* unspecified */
2d31347b
DB
176 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
177 remotes[remotes_nr++] = ret;
d0da003d
PR
178 ret->name = xstrndup(name, len);
179
180 hashmap_entry_init(ret, lookup_entry.hash);
181 replaced = hashmap_put(&remotes_hash, ret);
182 assert(replaced == NULL); /* no previous entry overwritten */
2d31347b 183 return ret;
5751f490
DB
184}
185
cf818348
DB
186static void add_merge(struct branch *branch, const char *name)
187{
2d31347b
DB
188 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
189 branch->merge_alloc);
190 branch->merge_name[branch->merge_nr++] = name;
cf818348
DB
191}
192
193static struct branch *make_branch(const char *name, int len)
194{
2d31347b
DB
195 struct branch *ret;
196 int i;
cf818348 197
2d31347b
DB
198 for (i = 0; i < branches_nr; i++) {
199 if (len ? (!strncmp(name, branches[i]->name, len) &&
200 !branches[i]->name[len]) :
201 !strcmp(name, branches[i]->name))
202 return branches[i];
cf818348
DB
203 }
204
2d31347b
DB
205 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
206 ret = xcalloc(1, sizeof(struct branch));
207 branches[branches_nr++] = ret;
cf818348 208 if (len)
2d31347b 209 ret->name = xstrndup(name, len);
cf818348 210 else
2d31347b 211 ret->name = xstrdup(name);
fa3f60b7 212 ret->refname = xstrfmt("refs/heads/%s", ret->name);
cf818348 213
2d31347b 214 return ret;
cf818348
DB
215}
216
d071d942 217static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
55029ae4
DB
218{
219 struct rewrite *ret;
220 int i;
221
d071d942 222 for (i = 0; i < r->rewrite_nr; i++) {
844112ca 223 if (len
d071d942
JT
224 ? (len == r->rewrite[i]->baselen &&
225 !strncmp(base, r->rewrite[i]->base, len))
226 : !strcmp(base, r->rewrite[i]->base))
227 return r->rewrite[i];
55029ae4
DB
228 }
229
d071d942 230 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
55029ae4 231 ret = xcalloc(1, sizeof(struct rewrite));
d071d942 232 r->rewrite[r->rewrite_nr++] = ret;
844112ca 233 if (len) {
55029ae4 234 ret->base = xstrndup(base, len);
844112ca
JH
235 ret->baselen = len;
236 }
237 else {
55029ae4 238 ret->base = xstrdup(base);
844112ca
JH
239 ret->baselen = strlen(base);
240 }
55029ae4
DB
241 return ret;
242}
243
244static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
245{
246 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
844112ca
JH
247 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
248 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
249 rewrite->instead_of_nr++;
55029ae4
DB
250}
251
0e265a92
JK
252static const char *skip_spaces(const char *s)
253{
254 while (isspace(*s))
255 s++;
256 return s;
257}
258
5751f490
DB
259static void read_remotes_file(struct remote *remote)
260{
0e265a92 261 struct strbuf buf = STRBUF_INIT;
e9d983f1 262 FILE *f = fopen_or_warn(git_path("remotes/%s", remote->name), "r");
5751f490
DB
263
264 if (!f)
265 return;
e459b073 266 remote->configured_in_repo = 1;
89cf4c70 267 remote->origin = REMOTE_REMOTES;
18814d0e 268 while (strbuf_getline(&buf, f) != EOF) {
0e265a92 269 const char *v;
5751f490 270
0e265a92 271 strbuf_rtrim(&buf);
5751f490 272
0e265a92
JK
273 if (skip_prefix(buf.buf, "URL:", &v))
274 add_url_alias(remote, xstrdup(skip_spaces(v)));
275 else if (skip_prefix(buf.buf, "Push:", &v))
276 add_push_refspec(remote, xstrdup(skip_spaces(v)));
277 else if (skip_prefix(buf.buf, "Pull:", &v))
278 add_fetch_refspec(remote, xstrdup(skip_spaces(v)));
5751f490 279 }
0e265a92 280 strbuf_release(&buf);
5751f490
DB
281 fclose(f);
282}
283
284static void read_branches_file(struct remote *remote)
285{
cf818348 286 char *frag;
f28e3ab2 287 struct strbuf buf = STRBUF_INIT;
e9d983f1 288 FILE *f = fopen_or_warn(git_path("branches/%s", remote->name), "r");
5751f490
DB
289
290 if (!f)
291 return;
f28e3ab2 292
8f309aeb 293 strbuf_getline_lf(&buf, f);
0fb19906 294 fclose(f);
f28e3ab2
JK
295 strbuf_trim(&buf);
296 if (!buf.len) {
297 strbuf_release(&buf);
5751f490 298 return;
f28e3ab2
JK
299 }
300
e459b073 301 remote->configured_in_repo = 1;
89cf4c70 302 remote->origin = REMOTE_BRANCHES;
472fa4cd
DB
303
304 /*
55cfde25 305 * The branches file would have URL and optionally
472fa4cd 306 * #branch specified. The "master" (or specified) branch is
f28e3ab2
JK
307 * fetched and stored in the local branch matching the
308 * remote name.
472fa4cd 309 */
f28e3ab2
JK
310 frag = strchr(buf.buf, '#');
311 if (frag)
cf818348 312 *(frag++) = '\0';
f28e3ab2
JK
313 else
314 frag = "master";
315
316 add_url_alias(remote, strbuf_detach(&buf, NULL));
317 add_fetch_refspec(remote, xstrfmt("refs/heads/%s:refs/heads/%s",
318 frag, remote->name));
55cfde25 319
18afe101
MK
320 /*
321 * Cogito compatible push: push current HEAD to remote #branch
322 * (master if missing)
323 */
f28e3ab2 324 add_push_refspec(remote, xstrfmt("HEAD:refs/heads/%s", frag));
d71ab174 325 remote->fetch_tags = 1; /* always auto-follow */
5751f490
DB
326}
327
ef90d6d4 328static int handle_config(const char *key, const char *value, void *cb)
5751f490
DB
329{
330 const char *name;
bc60f8a7 331 int namelen;
5751f490
DB
332 const char *subkey;
333 struct remote *remote;
cf818348 334 struct branch *branch;
bc60f8a7
TG
335 if (parse_config_key(key, "branch", &name, &namelen, &subkey) >= 0) {
336 if (!name)
cf818348 337 return 0;
bc60f8a7
TG
338 branch = make_branch(name, namelen);
339 if (!strcmp(subkey, "remote")) {
e41bf352 340 return git_config_string(&branch->remote_name, key, value);
bc60f8a7 341 } else if (!strcmp(subkey, "pushremote")) {
da66b274 342 return git_config_string(&branch->pushremote_name, key, value);
bc60f8a7 343 } else if (!strcmp(subkey, "merge")) {
d2370cc2
JH
344 if (!value)
345 return config_error_nonbool(key);
cf818348 346 add_merge(branch, xstrdup(value));
d2370cc2 347 }
cf818348 348 return 0;
5751f490 349 }
bc60f8a7 350 if (parse_config_key(key, "url", &name, &namelen, &subkey) >= 0) {
55029ae4 351 struct rewrite *rewrite;
bc60f8a7 352 if (!name)
55029ae4 353 return 0;
bc60f8a7
TG
354 if (!strcmp(subkey, "insteadof")) {
355 rewrite = make_rewrite(&rewrites, name, namelen);
1c2eafb8
JT
356 if (!value)
357 return config_error_nonbool(key);
358 add_instead_of(rewrite, xstrdup(value));
bc60f8a7
TG
359 } else if (!strcmp(subkey, "pushinsteadof")) {
360 rewrite = make_rewrite(&rewrites_push, name, namelen);
55029ae4
DB
361 if (!value)
362 return config_error_nonbool(key);
363 add_instead_of(rewrite, xstrdup(value));
364 }
365 }
224c2171 366
bc60f8a7 367 if (parse_config_key(key, "remote", &name, &namelen, &subkey) < 0)
5751f490 368 return 0;
224c2171
RR
369
370 /* Handle remote.* variables */
bc60f8a7 371 if (!name && !strcmp(subkey, "pushdefault"))
224c2171
RR
372 return git_config_string(&pushremote_name, key, value);
373
bc60f8a7
TG
374 if (!name)
375 return 0;
224c2171 376 /* Handle remote.<name>.* variables */
c82efafc
BC
377 if (*name == '/') {
378 warning("Config remote shorthand cannot begin with '/': %s",
379 name);
380 return 0;
381 }
bc60f8a7 382 remote = make_remote(name, namelen);
89cf4c70 383 remote->origin = REMOTE_CONFIG;
e459b073
JS
384 if (current_config_scope() == CONFIG_SCOPE_REPO)
385 remote->configured_in_repo = 1;
bc60f8a7 386 if (!strcmp(subkey, "mirror"))
84bb2dfd 387 remote->mirror = git_config_bool(key, value);
bc60f8a7 388 else if (!strcmp(subkey, "skipdefaultupdate"))
84bb2dfd 389 remote->skip_default_update = git_config_bool(key, value);
bc60f8a7 390 else if (!strcmp(subkey, "skipfetchall"))
7cc91a2f 391 remote->skip_default_update = git_config_bool(key, value);
bc60f8a7 392 else if (!strcmp(subkey, "prune"))
737c5a9c 393 remote->prune = git_config_bool(key, value);
bc60f8a7 394 else if (!strcmp(subkey, "url")) {
84bb2dfd
PB
395 const char *v;
396 if (git_config_string(&v, key, value))
397 return -1;
398 add_url(remote, v);
bc60f8a7 399 } else if (!strcmp(subkey, "pushurl")) {
20346234
MG
400 const char *v;
401 if (git_config_string(&v, key, value))
402 return -1;
403 add_pushurl(remote, v);
bc60f8a7 404 } else if (!strcmp(subkey, "push")) {
84bb2dfd
PB
405 const char *v;
406 if (git_config_string(&v, key, value))
407 return -1;
408 add_push_refspec(remote, v);
bc60f8a7 409 } else if (!strcmp(subkey, "fetch")) {
84bb2dfd
PB
410 const char *v;
411 if (git_config_string(&v, key, value))
412 return -1;
413 add_fetch_refspec(remote, v);
bc60f8a7 414 } else if (!strcmp(subkey, "receivepack")) {
84bb2dfd
PB
415 const char *v;
416 if (git_config_string(&v, key, value))
417 return -1;
5751f490 418 if (!remote->receivepack)
84bb2dfd 419 remote->receivepack = v;
5751f490
DB
420 else
421 error("more than one receivepack given, using the first");
bc60f8a7 422 } else if (!strcmp(subkey, "uploadpack")) {
84bb2dfd
PB
423 const char *v;
424 if (git_config_string(&v, key, value))
425 return -1;
0012ba21 426 if (!remote->uploadpack)
84bb2dfd 427 remote->uploadpack = v;
0012ba21
DB
428 else
429 error("more than one uploadpack given, using the first");
bc60f8a7 430 } else if (!strcmp(subkey, "tagopt")) {
d71ab174
DB
431 if (!strcmp(value, "--no-tags"))
432 remote->fetch_tags = -1;
944163a4
ST
433 else if (!strcmp(value, "--tags"))
434 remote->fetch_tags = 2;
bc60f8a7 435 } else if (!strcmp(subkey, "proxy")) {
84bb2dfd
PB
436 return git_config_string((const char **)&remote->http_proxy,
437 key, value);
bc60f8a7 438 } else if (!strcmp(subkey, "proxyauthmethod")) {
ef976395
KF
439 return git_config_string((const char **)&remote->http_proxy_authmethod,
440 key, value);
bc60f8a7 441 } else if (!strcmp(subkey, "vcs")) {
c578f51d 442 return git_config_string(&remote->foreign_vcs, key, value);
84bb2dfd 443 }
5751f490
DB
444 return 0;
445}
446
55029ae4
DB
447static void alias_all_urls(void)
448{
449 int i, j;
450 for (i = 0; i < remotes_nr; i++) {
1c2eafb8 451 int add_pushurl_aliases;
55029ae4
DB
452 if (!remotes[i])
453 continue;
20346234 454 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
d071d942 455 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
20346234 456 }
1c2eafb8
JT
457 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
458 for (j = 0; j < remotes[i]->url_nr; j++) {
459 if (add_pushurl_aliases)
460 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
461 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
462 }
55029ae4
DB
463 }
464}
465
5751f490
DB
466static void read_config(void)
467{
e41bf352 468 static int loaded;
5751f490 469 int flag;
e41bf352
JK
470
471 if (loaded)
5751f490 472 return;
e41bf352
JK
473 loaded = 1;
474
5751f490 475 current_branch = NULL;
f2f12d16 476 if (startup_info->have_repository) {
744c040b 477 const char *head_ref = resolve_ref_unsafe("HEAD", 0, NULL, &flag);
f2f12d16
JK
478 if (head_ref && (flag & REF_ISSYMREF) &&
479 skip_prefix(head_ref, "refs/heads/", &head_ref)) {
480 current_branch = make_branch(head_ref, 0);
481 }
5751f490 482 }
ef90d6d4 483 git_config(handle_config, NULL);
55029ae4 484 alias_all_urls();
5751f490
DB
485}
486
24b6177e 487static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
6b62816c
DB
488{
489 int i;
da7a478b 490 struct refspec *rs = xcalloc(nr_refspec, sizeof(*rs));
46220ca1 491
6b62816c 492 for (i = 0; i < nr_refspec; i++) {
47c6ef1c 493 size_t llen;
46220ca1
JH
494 int is_glob;
495 const char *lhs, *rhs;
8d9c5010 496 int flags;
46220ca1 497
8e76bf3f 498 is_glob = 0;
46220ca1
JH
499
500 lhs = refspec[i];
501 if (*lhs == '+') {
6b62816c 502 rs[i].force = 1;
46220ca1 503 lhs++;
6b62816c 504 }
46220ca1
JH
505
506 rhs = strrchr(lhs, ':');
a83619d6
PB
507
508 /*
509 * Before going on, special case ":" (or "+:") as a refspec
def24991 510 * for pushing matching refs.
a83619d6
PB
511 */
512 if (!fetch && rhs == lhs && rhs[1] == '\0') {
513 rs[i].matching = 1;
514 continue;
515 }
516
46220ca1 517 if (rhs) {
47c6ef1c 518 size_t rlen = strlen(++rhs);
abd2bde7 519 is_glob = (1 <= rlen && strchr(rhs, '*'));
08fbdb30 520 rs[i].dst = xstrndup(rhs, rlen);
6b62816c 521 }
ef00d150 522
46220ca1 523 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
abd2bde7 524 if (1 <= llen && memchr(lhs, '*', llen)) {
7d19da46
JH
525 if ((rhs && !is_glob) || (!rhs && fetch))
526 goto invalid;
527 is_glob = 1;
7d19da46
JH
528 } else if (rhs && is_glob) {
529 goto invalid;
ef00d150 530 }
7d19da46 531
46220ca1
JH
532 rs[i].pattern = is_glob;
533 rs[i].src = xstrndup(lhs, llen);
8d9c5010 534 flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
46220ca1
JH
535
536 if (fetch) {
fcd30b13 537 struct object_id unused;
6e7b66ee 538
def24991 539 /* LHS */
46220ca1 540 if (!*rs[i].src)
def24991 541 ; /* empty is ok; it means "HEAD" */
fcd30b13 542 else if (llen == GIT_SHA1_HEXSZ && !get_oid_hex(rs[i].src, &unused))
6e7b66ee 543 rs[i].exact_sha1 = 1; /* ok */
def24991
JH
544 else if (!check_refname_format(rs[i].src, flags))
545 ; /* valid looking ref is ok */
546 else
8d9c5010 547 goto invalid;
def24991 548 /* RHS */
8d9c5010 549 if (!rs[i].dst)
def24991 550 ; /* missing is ok; it is the same as empty */
8d9c5010 551 else if (!*rs[i].dst)
def24991
JH
552 ; /* empty is ok; it means "do not store" */
553 else if (!check_refname_format(rs[i].dst, flags))
554 ; /* valid looking ref is ok */
555 else
8d9c5010 556 goto invalid;
46220ca1
JH
557 } else {
558 /*
559 * LHS
560 * - empty is allowed; it means delete.
561 * - when wildcarded, it must be a valid looking ref.
562 * - otherwise, it must be an extended SHA-1, but
563 * there is no existing way to validate this.
564 */
565 if (!*rs[i].src)
566 ; /* empty is ok */
567 else if (is_glob) {
8d9c5010 568 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
569 goto invalid;
570 }
571 else
572 ; /* anything goes, for now */
573 /*
574 * RHS
575 * - missing is allowed, but LHS then must be a
576 * valid looking ref.
577 * - empty is not allowed.
578 * - otherwise it must be a valid looking ref.
579 */
580 if (!rs[i].dst) {
8d9c5010 581 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
582 goto invalid;
583 } else if (!*rs[i].dst) {
584 goto invalid;
585 } else {
8d9c5010 586 if (check_refname_format(rs[i].dst, flags))
46220ca1
JH
587 goto invalid;
588 }
ef00d150 589 }
6b62816c
DB
590 }
591 return rs;
46220ca1
JH
592
593 invalid:
24b6177e 594 if (verify) {
2cb1f36d
BC
595 /*
596 * nr_refspec must be greater than zero and i must be valid
597 * since it is only possible to reach this point from within
598 * the for loop above.
599 */
a56eea28 600 free_refspec(i+1, rs);
24b6177e
JF
601 return NULL;
602 }
46220ca1
JH
603 die("Invalid refspec '%s'", refspec[i]);
604}
605
24b6177e
JF
606int valid_fetch_refspec(const char *fetch_refspec_str)
607{
24b6177e
JF
608 struct refspec *refspec;
609
66dbfd55 610 refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
a56eea28 611 free_refspec(1, refspec);
24b6177e
JF
612 return !!refspec;
613}
614
46220ca1
JH
615struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
616{
24b6177e 617 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
46220ca1
JH
618}
619
c19ae47a 620struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
46220ca1 621{
24b6177e 622 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
6b62816c
DB
623}
624
72ff8943
DB
625void free_refspec(int nr_refspec, struct refspec *refspec)
626{
627 int i;
a56eea28
JK
628
629 if (!refspec)
630 return;
631
72ff8943
DB
632 for (i = 0; i < nr_refspec; i++) {
633 free(refspec[i].src);
634 free(refspec[i].dst);
635 }
636 free(refspec);
637}
638
df93e33c
DB
639static int valid_remote_nick(const char *name)
640{
8ca12c0d 641 if (!name[0] || is_dot_or_dotdot(name))
df93e33c 642 return 0;
d9244ecf
JS
643
644 /* remote nicknames cannot contain slashes */
645 while (*name)
646 if (is_dir_sep(*name++))
647 return 0;
648 return 1;
df93e33c
DB
649}
650
f052154d
JK
651const char *remote_for_branch(struct branch *branch, int *explicit)
652{
653 if (branch && branch->remote_name) {
654 if (explicit)
655 *explicit = 1;
656 return branch->remote_name;
657 }
658 if (explicit)
659 *explicit = 0;
660 return "origin";
661}
662
da66b274
JK
663const char *pushremote_for_branch(struct branch *branch, int *explicit)
664{
665 if (branch && branch->pushremote_name) {
666 if (explicit)
667 *explicit = 1;
668 return branch->pushremote_name;
669 }
670 if (pushremote_name) {
671 if (explicit)
672 *explicit = 1;
673 return pushremote_name;
674 }
675 return remote_for_branch(branch, explicit);
676}
677
9700fae5
W
678const char *remote_ref_for_branch(struct branch *branch, int for_push,
679 int *explicit)
680{
681 if (branch) {
682 if (!for_push) {
683 if (branch->merge_nr) {
684 if (explicit)
685 *explicit = 1;
686 return branch->merge_name[0];
687 }
688 } else {
689 const char *dst, *remote_name =
690 pushremote_for_branch(branch, NULL);
691 struct remote *remote = remote_get(remote_name);
692
693 if (remote && remote->push_refspec_nr &&
694 (dst = apply_refspecs(remote->push,
695 remote->push_refspec_nr,
696 branch->refname))) {
697 if (explicit)
698 *explicit = 1;
699 return dst;
700 }
701 }
702 }
703 if (explicit)
704 *explicit = 0;
705 return "";
706}
707
da66b274
JK
708static struct remote *remote_get_1(const char *name,
709 const char *(*get_default)(struct branch *, int *))
5751f490
DB
710{
711 struct remote *ret;
fa685bdf 712 int name_given = 0;
5751f490 713
8770e6fb
JK
714 read_config();
715
fa685bdf
DB
716 if (name)
717 name_given = 1;
da66b274
JK
718 else
719 name = get_default(current_branch, &name_given);
9326d494 720
5751f490 721 ret = make_remote(name, 0);
4539c218 722 if (valid_remote_nick(name) && have_git_dir()) {
0a4da29d 723 if (!valid_remote(ret))
5751f490 724 read_remotes_file(ret);
0a4da29d 725 if (!valid_remote(ret))
5751f490
DB
726 read_branches_file(ret);
727 }
0a4da29d 728 if (name_given && !valid_remote(ret))
55029ae4 729 add_url_alias(ret, name);
0a4da29d 730 if (!valid_remote(ret))
5751f490 731 return NULL;
46220ca1
JH
732 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
733 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
5751f490
DB
734 return ret;
735}
6b62816c 736
f24f715e
RR
737struct remote *remote_get(const char *name)
738{
da66b274 739 return remote_get_1(name, remote_for_branch);
f24f715e
RR
740}
741
742struct remote *pushremote_get(const char *name)
743{
da66b274 744 return remote_get_1(name, pushremote_for_branch);
f24f715e
RR
745}
746
e459b073 747int remote_is_configured(struct remote *remote, int in_repo)
9a23ba33 748{
e459b073
JS
749 if (!remote)
750 return 0;
751 if (in_repo)
752 return remote->configured_in_repo;
753 return !!remote->origin;
9a23ba33
FAG
754}
755
b42f6927
JS
756int for_each_remote(each_remote_fn fn, void *priv)
757{
758 int i, result = 0;
759 read_config();
2d31347b 760 for (i = 0; i < remotes_nr && !result; i++) {
b42f6927
JS
761 struct remote *r = remotes[i];
762 if (!r)
763 continue;
764 if (!r->fetch)
46220ca1
JH
765 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
766 r->fetch_refspec);
b42f6927 767 if (!r->push)
46220ca1
JH
768 r->push = parse_push_refspec(r->push_refspec_nr,
769 r->push_refspec);
b42f6927
JS
770 result = fn(r, priv);
771 }
772 return result;
773}
774
df02ebda
MH
775static void handle_duplicate(struct ref *ref1, struct ref *ref2)
776{
f096e6e8
MH
777 if (strcmp(ref1->name, ref2->name)) {
778 if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
779 ref2->fetch_head_status != FETCH_HEAD_IGNORE) {
780 die(_("Cannot fetch both %s and %s to %s"),
781 ref1->name, ref2->name, ref2->peer_ref->name);
782 } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
783 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
784 warning(_("%s usually tracks %s, not %s"),
785 ref2->peer_ref->name, ref2->name, ref1->name);
786 } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE &&
787 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
788 die(_("%s tracks both %s and %s"),
789 ref2->peer_ref->name, ref1->name, ref2->name);
790 } else {
791 /*
792 * This last possibility doesn't occur because
793 * FETCH_HEAD_IGNORE entries always appear at
794 * the end of the list.
795 */
796 die(_("Internal error"));
797 }
798 }
df02ebda
MH
799 free(ref2->peer_ref);
800 free(ref2);
801}
802
b9afe665 803struct ref *ref_remove_duplicates(struct ref *ref_map)
2467a4fa 804{
183113a5 805 struct string_list refs = STRING_LIST_INIT_NODUP;
b9afe665
MH
806 struct ref *retval = NULL;
807 struct ref **p = &retval;
73cf0822 808
b9afe665
MH
809 while (ref_map) {
810 struct ref *ref = ref_map;
811
812 ref_map = ref_map->next;
813 ref->next = NULL;
73cf0822 814
b9afe665
MH
815 if (!ref->peer_ref) {
816 *p = ref;
817 p = &ref->next;
09ea1f8e 818 } else {
b9afe665
MH
819 struct string_list_item *item =
820 string_list_insert(&refs, ref->peer_ref->name);
821
822 if (item->util) {
823 /* Entry already existed */
df02ebda 824 handle_duplicate((struct ref *)item->util, ref);
b9afe665
MH
825 } else {
826 *p = ref;
827 p = &ref->next;
828 item->util = ref;
829 }
2467a4fa
DB
830 }
831 }
b9afe665 832
73cf0822 833 string_list_clear(&refs, 0);
b9afe665 834 return retval;
2467a4fa
DB
835}
836
28b91f8a 837int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
838{
839 int i;
28b91f8a
SP
840 for (i = 0; i < remote->url_nr; i++) {
841 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
842 return 1;
843 }
844 return 0;
845}
846
e928213f
DB
847static int match_name_with_pattern(const char *key, const char *name,
848 const char *value, char **result)
a3c84239 849{
08fbdb30
DB
850 const char *kstar = strchr(key, '*');
851 size_t klen;
abd2bde7
DB
852 size_t ksuffixlen;
853 size_t namelen;
08fbdb30
DB
854 int ret;
855 if (!kstar)
856 die("Key '%s' of pattern had no '*'", key);
857 klen = kstar - key;
abd2bde7
DB
858 ksuffixlen = strlen(kstar + 1);
859 namelen = strlen(name);
860 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
861 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
e928213f 862 if (ret && value) {
07bfa575 863 struct strbuf sb = STRBUF_INIT;
08fbdb30 864 const char *vstar = strchr(value, '*');
08fbdb30
DB
865 if (!vstar)
866 die("Value '%s' of pattern has no '*'", value);
07bfa575
RS
867 strbuf_add(&sb, value, vstar - value);
868 strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen);
869 strbuf_addstr(&sb, vstar + 1);
870 *result = strbuf_detach(&sb, NULL);
e928213f 871 }
a3c84239
DB
872 return ret;
873}
874
e6f63712
CMN
875static void query_refspecs_multiple(struct refspec *refs, int ref_count, struct refspec *query, struct string_list *results)
876{
877 int i;
878 int find_src = !query->src;
879
880 if (find_src && !query->dst)
881 error("query_refspecs_multiple: need either src or dst");
882
883 for (i = 0; i < ref_count; i++) {
884 struct refspec *refspec = &refs[i];
885 const char *key = find_src ? refspec->dst : refspec->src;
886 const char *value = find_src ? refspec->src : refspec->dst;
887 const char *needle = find_src ? query->dst : query->src;
888 char **result = find_src ? &query->src : &query->dst;
889
890 if (!refspec->dst)
891 continue;
892 if (refspec->pattern) {
893 if (match_name_with_pattern(key, needle, value, result))
894 string_list_append_nodup(results, *result);
895 } else if (!strcmp(needle, key)) {
896 string_list_append(results, value);
897 }
898 }
899}
900
ca02465b 901int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
72ff8943
DB
902{
903 int i;
c500352e 904 int find_src = !query->src;
049bff8f
MH
905 const char *needle = find_src ? query->dst : query->src;
906 char **result = find_src ? &query->src : &query->dst;
72ff8943 907
c500352e
CMN
908 if (find_src && !query->dst)
909 return error("query_refspecs: need either src or dst");
b42f6927 910
c500352e
CMN
911 for (i = 0; i < ref_count; i++) {
912 struct refspec *refspec = &refs[i];
913 const char *key = find_src ? refspec->dst : refspec->src;
914 const char *value = find_src ? refspec->src : refspec->dst;
b42f6927 915
c500352e 916 if (!refspec->dst)
5d46c9d4 917 continue;
c500352e 918 if (refspec->pattern) {
e928213f 919 if (match_name_with_pattern(key, needle, value, result)) {
c500352e 920 query->force = refspec->force;
5d46c9d4
DB
921 return 0;
922 }
b42f6927
JS
923 } else if (!strcmp(needle, key)) {
924 *result = xstrdup(value);
c500352e 925 query->force = refspec->force;
b42f6927 926 return 0;
5d46c9d4
DB
927 }
928 }
5d46c9d4
DB
929 return -1;
930}
931
c500352e
CMN
932char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
933 const char *name)
934{
935 struct refspec query;
936
937 memset(&query, 0, sizeof(struct refspec));
938 query.src = (char *)name;
939
940 if (query_refspecs(refspecs, nr_refspec, &query))
941 return NULL;
942
943 return query.dst;
944}
945
946int remote_find_tracking(struct remote *remote, struct refspec *refspec)
947{
948 return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
949}
950
8009768e
RS
951static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
952 const char *name)
953{
954 size_t len = strlen(name);
50a6c8ef 955 struct ref *ref = xcalloc(1, st_add4(sizeof(*ref), prefixlen, len, 1));
8009768e
RS
956 memcpy(ref->name, prefix, prefixlen);
957 memcpy(ref->name + prefixlen, name, len);
958 return ref;
959}
960
59c69c0c 961struct ref *alloc_ref(const char *name)
dfd255dd 962{
59c69c0c 963 return alloc_ref_with_prefix("", 0, name);
737922aa
KK
964}
965
59a57757 966struct ref *copy_ref(const struct ref *ref)
d71ab174 967{
7b3db095
JS
968 struct ref *cpy;
969 size_t len;
970 if (!ref)
971 return NULL;
50a6c8ef
JK
972 len = st_add3(sizeof(struct ref), strlen(ref->name), 1);
973 cpy = xmalloc(len);
974 memcpy(cpy, ref, len);
7b3db095 975 cpy->next = NULL;
8c53f071
JK
976 cpy->symref = xstrdup_or_null(ref->symref);
977 cpy->remote_status = xstrdup_or_null(ref->remote_status);
7b3db095
JS
978 cpy->peer_ref = copy_ref(ref->peer_ref);
979 return cpy;
d71ab174
DB
980}
981
4577370e
DB
982struct ref *copy_ref_list(const struct ref *ref)
983{
984 struct ref *ret = NULL;
985 struct ref **tail = &ret;
986 while (ref) {
987 *tail = copy_ref(ref);
988 ref = ref->next;
989 tail = &((*tail)->next);
990 }
991 return ret;
992}
993
697d7f5d 994static void free_ref(struct ref *ref)
be885d96
DB
995{
996 if (!ref)
997 return;
7b3db095 998 free_ref(ref->peer_ref);
be885d96
DB
999 free(ref->remote_status);
1000 free(ref->symref);
1001 free(ref);
1002}
1003
dfd255dd
DB
1004void free_refs(struct ref *ref)
1005{
1006 struct ref *next;
1007 while (ref) {
1008 next = ref->next;
be885d96 1009 free_ref(ref);
dfd255dd
DB
1010 ref = next;
1011 }
1012}
1013
ed81c76b
JK
1014int ref_compare_name(const void *va, const void *vb)
1015{
1016 const struct ref *a = va, *b = vb;
1017 return strcmp(a->name, b->name);
1018}
1019
1020static void *ref_list_get_next(const void *a)
1021{
1022 return ((const struct ref *)a)->next;
1023}
1024
1025static void ref_list_set_next(void *a, void *next)
1026{
1027 ((struct ref *)a)->next = next;
1028}
1029
1030void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
1031{
1032 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
1033}
1034
ca02465b
JH
1035int count_refspec_match(const char *pattern,
1036 struct ref *refs,
1037 struct ref **matched_ref)
6b62816c
DB
1038{
1039 int patlen = strlen(pattern);
1040 struct ref *matched_weak = NULL;
1041 struct ref *matched = NULL;
1042 int weak_match = 0;
1043 int match = 0;
1044
1045 for (weak_match = match = 0; refs; refs = refs->next) {
1046 char *name = refs->name;
1047 int namelen = strlen(name);
6b62816c 1048
54457fe5 1049 if (!refname_match(pattern, name))
6b62816c
DB
1050 continue;
1051
1052 /* A match is "weak" if it is with refs outside
1053 * heads or tags, and did not specify the pattern
1054 * in full (e.g. "refs/remotes/origin/master") or at
1055 * least from the toplevel (e.g. "remotes/origin/master");
1056 * otherwise "git push $URL master" would result in
1057 * ambiguity between remotes/origin/master and heads/master
1058 * at the remote site.
1059 */
1060 if (namelen != patlen &&
1061 patlen != namelen - 5 &&
59556548
CC
1062 !starts_with(name, "refs/heads/") &&
1063 !starts_with(name, "refs/tags/")) {
6b62816c
DB
1064 /* We want to catch the case where only weak
1065 * matches are found and there are multiple
1066 * matches, and where more than one strong
1067 * matches are found, as ambiguous. One
1068 * strong match with zero or more weak matches
1069 * are acceptable as a unique match.
1070 */
1071 matched_weak = refs;
1072 weak_match++;
1073 }
1074 else {
1075 matched = refs;
1076 match++;
1077 }
1078 }
1079 if (!matched) {
471fd3fe
JK
1080 if (matched_ref)
1081 *matched_ref = matched_weak;
6b62816c
DB
1082 return weak_match;
1083 }
1084 else {
471fd3fe
JK
1085 if (matched_ref)
1086 *matched_ref = matched;
6b62816c
DB
1087 return match;
1088 }
1089}
1090
1d735267 1091static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
1092{
1093 **tail = ref;
1d735267
DB
1094 while (ref->next)
1095 ref = ref->next;
6b62816c 1096 *tail = &ref->next;
6b62816c
DB
1097}
1098
67655246
FC
1099static struct ref *alloc_delete_ref(void)
1100{
1101 struct ref *ref = alloc_ref("(delete)");
f4e54d02 1102 oidclr(&ref->new_oid);
67655246
FC
1103 return ref;
1104}
1105
471fd3fe
JK
1106static int try_explicit_object_name(const char *name,
1107 struct ref **match)
6b62816c 1108{
fcd30b13 1109 struct object_id oid;
6b62816c 1110
471fd3fe
JK
1111 if (!*name) {
1112 if (match)
1113 *match = alloc_delete_ref();
1114 return 0;
1115 }
1116
e82caf38 1117 if (get_oid(name, &oid))
471fd3fe
JK
1118 return -1;
1119
1120 if (match) {
1121 *match = alloc_ref(name);
fcd30b13 1122 oidcpy(&(*match)->new_oid, &oid);
471fd3fe
JK
1123 }
1124 return 0;
6b62816c
DB
1125}
1126
1d735267 1127static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 1128{
59c69c0c 1129 struct ref *ret = alloc_ref(name);
1d735267
DB
1130 tail_link_ref(ret, tail);
1131 return ret;
163f0ee5 1132}
8558fd9e 1133
f8aae120
JK
1134static char *guess_ref(const char *name, struct ref *peer)
1135{
1136 struct strbuf buf = STRBUF_INIT;
f8aae120 1137
7695d118 1138 const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING,
744c040b 1139 NULL, NULL);
f8aae120
JK
1140 if (!r)
1141 return NULL;
1142
59556548 1143 if (starts_with(r, "refs/heads/"))
f8aae120 1144 strbuf_addstr(&buf, "refs/heads/");
59556548 1145 else if (starts_with(r, "refs/tags/"))
f8aae120
JK
1146 strbuf_addstr(&buf, "refs/tags/");
1147 else
1148 return NULL;
1149
1150 strbuf_addstr(&buf, name);
1151 return strbuf_detach(&buf, NULL);
1152}
1153
f7ade3d3
JK
1154static int match_explicit_lhs(struct ref *src,
1155 struct refspec *rs,
1156 struct ref **match,
1157 int *allocated_match)
1158{
1159 switch (count_refspec_match(rs->src, src, match)) {
1160 case 1:
471fd3fe
JK
1161 if (allocated_match)
1162 *allocated_match = 0;
f7ade3d3
JK
1163 return 0;
1164 case 0:
1165 /* The source could be in the get_sha1() format
1166 * not a reference name. :refs/other is a
1167 * way to delete 'other' ref at the remote end.
1168 */
471fd3fe 1169 if (try_explicit_object_name(rs->src, match) < 0)
f7ade3d3 1170 return error("src refspec %s does not match any.", rs->src);
471fd3fe
JK
1171 if (allocated_match)
1172 *allocated_match = 1;
f7ade3d3
JK
1173 return 0;
1174 default:
1175 return error("src refspec %s matches more than one.", rs->src);
1176 }
1177}
1178
54a8ad92
JH
1179static int match_explicit(struct ref *src, struct ref *dst,
1180 struct ref ***dst_tail,
9a7bbd1d 1181 struct refspec *rs)
6b62816c 1182{
54a8ad92 1183 struct ref *matched_src, *matched_dst;
f7ade3d3 1184 int allocated_src;
8558fd9e 1185
54a8ad92 1186 const char *dst_value = rs->dst;
f8aae120 1187 char *dst_guess;
6b62816c 1188
a83619d6 1189 if (rs->pattern || rs->matching)
9a7bbd1d 1190 return 0;
8558fd9e 1191
54a8ad92 1192 matched_src = matched_dst = NULL;
f7ade3d3
JK
1193 if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0)
1194 return -1;
3c8b7df1 1195
4491e62a 1196 if (!dst_value) {
9f0ea7e8
DB
1197 int flag;
1198
7695d118
RS
1199 dst_value = resolve_ref_unsafe(matched_src->name,
1200 RESOLVE_REF_READING,
744c040b 1201 NULL, &flag);
9f0ea7e8
DB
1202 if (!dst_value ||
1203 ((flag & REF_ISSYMREF) &&
59556548 1204 !starts_with(dst_value, "refs/heads/")))
9f0ea7e8
DB
1205 die("%s cannot be resolved to branch.",
1206 matched_src->name);
4491e62a 1207 }
3c8b7df1 1208
54a8ad92
JH
1209 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1210 case 1:
1211 break;
1212 case 0:
50e19a83 1213 if (starts_with(dst_value, "refs/"))
1d735267 1214 matched_dst = make_linked_ref(dst_value, dst_tail);
f4e54d02 1215 else if (is_null_oid(&matched_src->new_oid))
5742c82b
JK
1216 error("unable to delete '%s': remote ref does not exist",
1217 dst_value);
3dc7ea91 1218 else if ((dst_guess = guess_ref(dst_value, matched_src))) {
f8aae120 1219 matched_dst = make_linked_ref(dst_guess, dst_tail);
3dc7ea91
JS
1220 free(dst_guess);
1221 } else
f8aae120
JK
1222 error("unable to push to unqualified destination: %s\n"
1223 "The destination refspec neither matches an "
1224 "existing ref on the remote nor\n"
1225 "begins with refs/, and we are unable to "
1226 "guess a prefix based on the source ref.",
1227 dst_value);
54a8ad92
JH
1228 break;
1229 default:
3c8b7df1 1230 matched_dst = NULL;
54a8ad92
JH
1231 error("dst refspec %s matches more than one.",
1232 dst_value);
1233 break;
1234 }
9a7bbd1d
JK
1235 if (!matched_dst)
1236 return -1;
1237 if (matched_dst->peer_ref)
1238 return error("dst ref %s receives from more than one src.",
54a8ad92 1239 matched_dst->name);
54a8ad92 1240 else {
f7ade3d3
JK
1241 matched_dst->peer_ref = allocated_src ?
1242 matched_src :
1243 copy_ref(matched_src);
54a8ad92 1244 matched_dst->force = rs->force;
6b62816c 1245 }
9a7bbd1d 1246 return 0;
54a8ad92
JH
1247}
1248
1249static int match_explicit_refs(struct ref *src, struct ref *dst,
1250 struct ref ***dst_tail, struct refspec *rs,
1251 int rs_nr)
1252{
1253 int i, errs;
1254 for (i = errs = 0; i < rs_nr; i++)
9a7bbd1d
JK
1255 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1256 return errs;
6b62816c
DB
1257}
1258
db70a04c 1259static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
6ddba5e2 1260 int send_mirror, int direction, const struct refspec **ret_pat)
8558fd9e 1261{
db70a04c
FC
1262 const struct refspec *pat;
1263 char *name;
8558fd9e 1264 int i;
a83619d6 1265 int matching_refs = -1;
8558fd9e 1266 for (i = 0; i < rs_nr; i++) {
a83619d6
PB
1267 if (rs[i].matching &&
1268 (matching_refs == -1 || rs[i].force)) {
1269 matching_refs = i;
1270 continue;
1271 }
1272
db70a04c
FC
1273 if (rs[i].pattern) {
1274 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
6ddba5e2
FC
1275 int match;
1276 if (direction == FROM_SRC)
1277 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1278 else
1279 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1280 if (match) {
db70a04c
FC
1281 matching_refs = i;
1282 break;
1283 }
1284 }
8558fd9e 1285 }
db70a04c 1286 if (matching_refs == -1)
a83619d6 1287 return NULL;
db70a04c
FC
1288
1289 pat = rs + matching_refs;
1290 if (pat->matching) {
1291 /*
1292 * "matching refs"; traditionally we pushed everything
1293 * including refs outside refs/heads/ hierarchy, but
1294 * that does not make much sense these days.
1295 */
59556548 1296 if (!send_mirror && !starts_with(ref->name, "refs/heads/"))
db70a04c
FC
1297 return NULL;
1298 name = xstrdup(ref->name);
1299 }
1300 if (ret_pat)
1301 *ret_pat = pat;
1302 return name;
8558fd9e
DB
1303}
1304
6d2bf96e
CB
1305static struct ref **tail_ref(struct ref **head)
1306{
1307 struct ref **tail = head;
1308 while (*tail)
1309 tail = &((*tail)->next);
1310 return tail;
1311}
1312
c2aba155
JH
1313struct tips {
1314 struct commit **tip;
1315 int nr, alloc;
1316};
1317
fcd30b13 1318static void add_to_tips(struct tips *tips, const struct object_id *oid)
c2aba155
JH
1319{
1320 struct commit *commit;
1321
fcd30b13 1322 if (is_null_oid(oid))
c2aba155 1323 return;
bc83266a 1324 commit = lookup_commit_reference_gently(oid, 1);
c2aba155
JH
1325 if (!commit || (commit->object.flags & TMP_MARK))
1326 return;
1327 commit->object.flags |= TMP_MARK;
1328 ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc);
1329 tips->tip[tips->nr++] = commit;
1330}
1331
1332static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
1333{
1334 struct string_list dst_tag = STRING_LIST_INIT_NODUP;
1335 struct string_list src_tag = STRING_LIST_INIT_NODUP;
1336 struct string_list_item *item;
1337 struct ref *ref;
1338 struct tips sent_tips;
1339
1340 /*
1341 * Collect everything we know they would have at the end of
1342 * this push, and collect all tags they have.
1343 */
1344 memset(&sent_tips, 0, sizeof(sent_tips));
1345 for (ref = *dst; ref; ref = ref->next) {
1346 if (ref->peer_ref &&
f4e54d02 1347 !is_null_oid(&ref->peer_ref->new_oid))
fcd30b13 1348 add_to_tips(&sent_tips, &ref->peer_ref->new_oid);
c2aba155 1349 else
fcd30b13 1350 add_to_tips(&sent_tips, &ref->old_oid);
59556548 1351 if (starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1352 string_list_append(&dst_tag, ref->name);
1353 }
1354 clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK);
1355
3383e199 1356 string_list_sort(&dst_tag);
c2aba155
JH
1357
1358 /* Collect tags they do not have. */
1359 for (ref = src; ref; ref = ref->next) {
59556548 1360 if (!starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1361 continue; /* not a tag */
1362 if (string_list_has_string(&dst_tag, ref->name))
1363 continue; /* they already have it */
f4e54d02 1364 if (sha1_object_info(ref->new_oid.hash, NULL) != OBJ_TAG)
c2aba155
JH
1365 continue; /* be conservative */
1366 item = string_list_append(&src_tag, ref->name);
1367 item->util = ref;
1368 }
1369 string_list_clear(&dst_tag, 0);
1370
1371 /*
1372 * At this point, src_tag lists tags that are missing from
1373 * dst, and sent_tips lists the tips we are pushing or those
1374 * that we know they already have. An element in the src_tag
1375 * that is an ancestor of any of the sent_tips needs to be
1376 * sent to the other side.
1377 */
1378 if (sent_tips.nr) {
1379 for_each_string_list_item(item, &src_tag) {
1380 struct ref *ref = item->util;
1381 struct ref *dst_ref;
1382 struct commit *commit;
1383
f4e54d02 1384 if (is_null_oid(&ref->new_oid))
c2aba155 1385 continue;
bc83266a 1386 commit = lookup_commit_reference_gently(&ref->new_oid,
1387 1);
c2aba155
JH
1388 if (!commit)
1389 /* not pushing a commit, which is not an error */
1390 continue;
1391
1392 /*
1393 * Is this tag, which they do not have, reachable from
1394 * any of the commits we are sending?
1395 */
1396 if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
1397 continue;
1398
1399 /* Add it in */
1400 dst_ref = make_linked_ref(ref->name, dst_tail);
f4e54d02 1401 oidcpy(&dst_ref->new_oid, &ref->new_oid);
c2aba155
JH
1402 dst_ref->peer_ref = copy_ref(ref);
1403 }
1404 }
1405 string_list_clear(&src_tag, 0);
1406 free(sent_tips.tip);
1407}
1408
47a59185
JH
1409struct ref *find_ref_by_name(const struct ref *list, const char *name)
1410{
1411 for ( ; list; list = list->next)
1412 if (!strcmp(list->name, name))
1413 return (struct ref *)list;
1414 return NULL;
1415}
1416
f1bd15ab
BC
1417static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
1418{
1419 for ( ; ref; ref = ref->next)
1420 string_list_append_nodup(ref_index, ref->name)->util = ref;
1421
3383e199 1422 string_list_sort(ref_index);
f1bd15ab
BC
1423}
1424
ba928c13
JK
1425/*
1426 * Given only the set of local refs, sanity-check the set of push
1427 * refspecs. We can't catch all errors that match_push_refs would,
1428 * but we can catch some errors early before even talking to the
1429 * remote side.
1430 */
1431int check_push_refs(struct ref *src, int nr_refspec, const char **refspec_names)
1432{
1433 struct refspec *refspec = parse_push_refspec(nr_refspec, refspec_names);
1434 int ret = 0;
1435 int i;
1436
1437 for (i = 0; i < nr_refspec; i++) {
1438 struct refspec *rs = refspec + i;
1439
1440 if (rs->pattern || rs->matching)
1441 continue;
1442
1443 ret |= match_explicit_lhs(src, rs, NULL, NULL);
1444 }
1445
1446 free_refspec(nr_refspec, refspec);
1447 return ret;
1448}
1449
54a8ad92 1450/*
29753cdd
JH
1451 * Given the set of refs the local repository has, the set of refs the
1452 * remote repository has, and the refspec used for push, determine
1453 * what remote refs we will update and with what value by setting
1454 * peer_ref (which object is being pushed) and force (if the push is
1455 * forced) in elements of "dst". The function may add new elements to
1456 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
54a8ad92 1457 */
29753cdd
JH
1458int match_push_refs(struct ref *src, struct ref **dst,
1459 int nr_refspec, const char **refspec, int flags)
6b62816c 1460{
a83619d6 1461 struct refspec *rs;
28b9d6e5
AW
1462 int send_all = flags & MATCH_REFS_ALL;
1463 int send_mirror = flags & MATCH_REFS_MIRROR;
6ddba5e2 1464 int send_prune = flags & MATCH_REFS_PRUNE;
5f48cb95 1465 int errs;
2af202be 1466 static const char *default_refspec[] = { ":", NULL };
b1d8b1f3 1467 struct ref *ref, **dst_tail = tail_ref(dst);
f1bd15ab 1468 struct string_list dst_ref_index = STRING_LIST_INIT_NODUP;
6b62816c 1469
a83619d6
PB
1470 if (!nr_refspec) {
1471 nr_refspec = 1;
1472 refspec = default_refspec;
1473 }
1474 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
6d2bf96e 1475 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
6b62816c
DB
1476
1477 /* pick the remainder */
b1d8b1f3 1478 for (ref = src; ref; ref = ref->next) {
f1bd15ab 1479 struct string_list_item *dst_item;
6b62816c 1480 struct ref *dst_peer;
6e66bf3c
AR
1481 const struct refspec *pat = NULL;
1482 char *dst_name;
db70a04c 1483
6ddba5e2 1484 dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
db70a04c 1485 if (!dst_name)
a83619d6
PB
1486 continue;
1487
f1bd15ab
BC
1488 if (!dst_ref_index.nr)
1489 prepare_ref_index(&dst_ref_index, *dst);
1490
1491 dst_item = string_list_lookup(&dst_ref_index, dst_name);
1492 dst_peer = dst_item ? dst_item->util : NULL;
a83619d6
PB
1493 if (dst_peer) {
1494 if (dst_peer->peer_ref)
1495 /* We're already sending something to this ref. */
1496 goto free_name;
a83619d6
PB
1497 } else {
1498 if (pat->matching && !(send_all || send_mirror))
1499 /*
1500 * Remote doesn't have it, and we have no
1501 * explicit pattern, and we don't have
01689909 1502 * --all or --mirror.
a83619d6
PB
1503 */
1504 goto free_name;
28b9d6e5 1505
6b62816c 1506 /* Create a new one and link it */
6d2bf96e 1507 dst_peer = make_linked_ref(dst_name, &dst_tail);
f4e54d02 1508 oidcpy(&dst_peer->new_oid, &ref->new_oid);
f1bd15ab
BC
1509 string_list_insert(&dst_ref_index,
1510 dst_peer->name)->util = dst_peer;
6b62816c 1511 }
b1d8b1f3 1512 dst_peer->peer_ref = copy_ref(ref);
a83619d6 1513 dst_peer->force = pat->force;
6e66bf3c
AR
1514 free_name:
1515 free(dst_name);
6b62816c 1516 }
c2aba155 1517
f1bd15ab
BC
1518 string_list_clear(&dst_ref_index, 0);
1519
c2aba155
JH
1520 if (flags & MATCH_REFS_FOLLOW_TAGS)
1521 add_missing_tags(src, dst, &dst_tail);
1522
6ddba5e2 1523 if (send_prune) {
f1bd15ab 1524 struct string_list src_ref_index = STRING_LIST_INIT_NODUP;
6ddba5e2
FC
1525 /* check for missing refs on the remote */
1526 for (ref = *dst; ref; ref = ref->next) {
1527 char *src_name;
1528
1529 if (ref->peer_ref)
1530 /* We're already sending something to this ref. */
1531 continue;
1532
1533 src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
1534 if (src_name) {
f1bd15ab
BC
1535 if (!src_ref_index.nr)
1536 prepare_ref_index(&src_ref_index, src);
1537 if (!string_list_has_string(&src_ref_index,
1538 src_name))
6ddba5e2
FC
1539 ref->peer_ref = alloc_delete_ref();
1540 free(src_name);
1541 }
1542 }
f1bd15ab 1543 string_list_clear(&src_ref_index, 0);
6ddba5e2 1544 }
5f48cb95
JS
1545 if (errs)
1546 return -1;
6b62816c
DB
1547 return 0;
1548}
cf818348 1549
20e8b465 1550void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
631b5ef2 1551 int force_update)
20e8b465
TRC
1552{
1553 struct ref *ref;
1554
1555 for (ref = remote_refs; ref; ref = ref->next) {
8c5f6f71 1556 int force_ref_update = ref->force || force_update;
631b5ef2 1557 int reject_reason = 0;
8c5f6f71 1558
20e8b465 1559 if (ref->peer_ref)
f4e54d02 1560 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
20e8b465
TRC
1561 else if (!send_mirror)
1562 continue;
1563
f4e54d02 1564 ref->deletion = is_null_oid(&ref->new_oid);
20e8b465 1565 if (!ref->deletion &&
f4e54d02 1566 !oidcmp(&ref->old_oid, &ref->new_oid)) {
20e8b465
TRC
1567 ref->status = REF_STATUS_UPTODATE;
1568 continue;
1569 }
1570
a272b289 1571 /*
b2e93f88
AW
1572 * If the remote ref has moved and is now different
1573 * from what we expect, reject any push.
631b5ef2
JH
1574 *
1575 * It also is an error if the user told us to check
1576 * with the remote-tracking branch to find the value
1577 * to expect, but we did not have such a tracking
1578 * branch.
1579 */
1580 if (ref->expect_old_sha1) {
64ac39af 1581 if (oidcmp(&ref->old_oid, &ref->old_oid_expect))
631b5ef2 1582 reject_reason = REF_STATUS_REJECT_STALE;
b2e93f88
AW
1583 else
1584 /* If the ref isn't stale then force the update. */
1585 force_ref_update = 1;
631b5ef2
JH
1586 }
1587
1588 /*
b2e93f88
AW
1589 * If the update isn't already rejected then check
1590 * the usual "must fast-forward" rules.
631b5ef2 1591 *
256b9d70
JH
1592 * Decide whether an individual refspec A:B can be
1593 * pushed. The push will succeed if any of the
1594 * following are true:
20e8b465 1595 *
a272b289 1596 * (1) the remote reference B does not exist
20e8b465 1597 *
a272b289
CR
1598 * (2) the remote reference B is being removed (i.e.,
1599 * pushing :B where no source is specified)
20e8b465 1600 *
256b9d70
JH
1601 * (3) the destination is not under refs/tags/, and
1602 * if the old and new value is a commit, the new
1603 * is a descendant of the old.
20e8b465 1604 *
a272b289
CR
1605 * (4) it is forced using the +A:B notation, or by
1606 * passing the --force argument
20e8b465
TRC
1607 */
1608
b2e93f88 1609 if (!reject_reason && !ref->deletion && !is_null_oid(&ref->old_oid)) {
59556548 1610 if (starts_with(ref->name, "refs/tags/"))
631b5ef2 1611 reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
f4e54d02 1612 else if (!has_object_file(&ref->old_oid))
631b5ef2 1613 reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
bc83266a 1614 else if (!lookup_commit_reference_gently(&ref->old_oid, 1) ||
1615 !lookup_commit_reference_gently(&ref->new_oid, 1))
631b5ef2 1616 reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
6f3d57b6 1617 else if (!ref_newer(&ref->new_oid, &ref->old_oid))
631b5ef2 1618 reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
20e8b465 1619 }
631b5ef2
JH
1620
1621 /*
1622 * "--force" will defeat any rejection implemented
1623 * by the rules above.
1624 */
1625 if (!force_ref_update)
1626 ref->status = reject_reason;
1627 else if (reject_reason)
1628 ref->forced_update = 1;
20e8b465
TRC
1629 }
1630}
1631
05e73682
JH
1632static void set_merge(struct branch *ret)
1633{
9e3751d4 1634 struct remote *remote;
05e73682 1635 char *ref;
fcd30b13 1636 struct object_id oid;
05e73682
JH
1637 int i;
1638
ee2499fe
JK
1639 if (!ret)
1640 return; /* no branch */
1641 if (ret->merge)
1642 return; /* already run */
1643 if (!ret->remote_name || !ret->merge_nr) {
1644 /*
1645 * no merge config; let's make sure we don't confuse callers
1646 * with a non-zero merge_nr but a NULL merge
1647 */
1648 ret->merge_nr = 0;
1649 return;
1650 }
1651
9e3751d4
JK
1652 remote = remote_get(ret->remote_name);
1653
05e73682
JH
1654 ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
1655 for (i = 0; i < ret->merge_nr; i++) {
1656 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1657 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
9e3751d4 1658 if (!remote_find_tracking(remote, ret->merge[i]) ||
05e73682
JH
1659 strcmp(ret->remote_name, "."))
1660 continue;
1661 if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
cca5fa64 1662 &oid, &ref) == 1)
05e73682
JH
1663 ret->merge[i]->dst = ref;
1664 else
1665 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1666 }
1667}
1668
cf818348
DB
1669struct branch *branch_get(const char *name)
1670{
1671 struct branch *ret;
1672
1673 read_config();
1674 if (!name || !*name || !strcmp(name, "HEAD"))
1675 ret = current_branch;
1676 else
1677 ret = make_branch(name, 0);
ee2499fe 1678 set_merge(ret);
cf818348
DB
1679 return ret;
1680}
1681
1682int branch_has_merge_config(struct branch *branch)
1683{
1684 return branch && !!branch->merge;
1685}
1686
85682c19
SP
1687int branch_merge_matches(struct branch *branch,
1688 int i,
1689 const char *refname)
cf818348 1690{
85682c19 1691 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 1692 return 0;
54457fe5 1693 return refname_match(branch->merge[i]->src, refname);
cf818348 1694}
d71ab174 1695
060e7766 1696__attribute__((format (printf,2,3)))
3a429d0a
JK
1697static const char *error_buf(struct strbuf *err, const char *fmt, ...)
1698{
1699 if (err) {
1700 va_list ap;
1701 va_start(ap, fmt);
1702 strbuf_vaddf(err, fmt, ap);
1703 va_end(ap);
1704 }
1705 return NULL;
1706}
1707
1708const char *branch_get_upstream(struct branch *branch, struct strbuf *err)
1709{
1710 if (!branch)
1711 return error_buf(err, _("HEAD does not point to a branch"));
1ca41a19
JK
1712
1713 if (!branch->merge || !branch->merge[0]) {
1714 /*
1715 * no merge config; is it because the user didn't define any,
1716 * or because it is not a real branch, and get_branch
1717 * auto-vivified it?
1718 */
3a429d0a
JK
1719 if (!ref_exists(branch->refname))
1720 return error_buf(err, _("no such branch: '%s'"),
1721 branch->name);
1ca41a19
JK
1722 return error_buf(err,
1723 _("no upstream configured for branch '%s'"),
1724 branch->name);
1725 }
1726
1727 if (!branch->merge[0]->dst)
3a429d0a
JK
1728 return error_buf(err,
1729 _("upstream branch '%s' not stored as a remote-tracking branch"),
1730 branch->merge[0]->src);
3a429d0a 1731
a9f9f8cc
JK
1732 return branch->merge[0]->dst;
1733}
1734
e291c75a
JK
1735static const char *tracking_for_push_dest(struct remote *remote,
1736 const char *refname,
1737 struct strbuf *err)
1738{
1739 char *ret;
1740
1741 ret = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
1742 if (!ret)
1743 return error_buf(err,
1744 _("push destination '%s' on remote '%s' has no local tracking branch"),
1745 refname, remote->name);
1746 return ret;
1747}
1748
1749static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
1750{
1751 struct remote *remote;
1752
e291c75a
JK
1753 remote = remote_get(pushremote_for_branch(branch, NULL));
1754 if (!remote)
1755 return error_buf(err,
1756 _("branch '%s' has no remote for pushing"),
1757 branch->name);
1758
1759 if (remote->push_refspec_nr) {
1760 char *dst;
1761 const char *ret;
1762
1763 dst = apply_refspecs(remote->push, remote->push_refspec_nr,
1764 branch->refname);
1765 if (!dst)
1766 return error_buf(err,
1767 _("push refspecs for '%s' do not include '%s'"),
1768 remote->name, branch->name);
1769
1770 ret = tracking_for_push_dest(remote, dst, err);
1771 free(dst);
1772 return ret;
1773 }
1774
1775 if (remote->mirror)
1776 return tracking_for_push_dest(remote, branch->refname, err);
1777
1778 switch (push_default) {
1779 case PUSH_DEFAULT_NOTHING:
1780 return error_buf(err, _("push has no destination (push.default is 'nothing')"));
1781
1782 case PUSH_DEFAULT_MATCHING:
1783 case PUSH_DEFAULT_CURRENT:
1784 return tracking_for_push_dest(remote, branch->refname, err);
1785
1786 case PUSH_DEFAULT_UPSTREAM:
1787 return branch_get_upstream(branch, err);
1788
1789 case PUSH_DEFAULT_UNSPECIFIED:
1790 case PUSH_DEFAULT_SIMPLE:
1791 {
1792 const char *up, *cur;
1793
1794 up = branch_get_upstream(branch, err);
1795 if (!up)
1796 return NULL;
1797 cur = tracking_for_push_dest(remote, branch->refname, err);
1798 if (!cur)
1799 return NULL;
1800 if (strcmp(cur, up))
1801 return error_buf(err,
1802 _("cannot resolve 'simple' push to a single destination"));
1803 return cur;
1804 }
1805 }
1806
1807 die("BUG: unhandled push situation");
1808}
1809
1810const char *branch_get_push(struct branch *branch, struct strbuf *err)
1811{
b10731f4
KM
1812 if (!branch)
1813 return error_buf(err, _("HEAD does not point to a branch"));
1814
e291c75a
JK
1815 if (!branch->push_tracking_ref)
1816 branch->push_tracking_ref = branch_get_push_1(branch, err);
1817 return branch->push_tracking_ref;
1818}
1819
f8fb971e
JH
1820static int ignore_symref_update(const char *refname)
1821{
f8fb971e
JH
1822 int flag;
1823
744c040b 1824 if (!resolve_ref_unsafe(refname, 0, NULL, &flag))
f8fb971e
JH
1825 return 0; /* non-existing refs are OK */
1826 return (flag & REF_ISSYMREF);
1827}
1828
f166db26
MH
1829/*
1830 * Create and return a list of (struct ref) consisting of copies of
1831 * each remote_ref that matches refspec. refspec must be a pattern.
1832 * Fill in the copies' peer_ref to describe the local tracking refs to
1833 * which they map. Omit any references that would map to an existing
1834 * local symbolic ref.
1835 */
4577370e 1836static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
1837 const struct refspec *refspec)
1838{
4577370e 1839 const struct ref *ref;
d71ab174
DB
1840 struct ref *ret = NULL;
1841 struct ref **tail = &ret;
1842
d71ab174 1843 for (ref = remote_refs; ref; ref = ref->next) {
e31a17f7
MH
1844 char *expn_name = NULL;
1845
d71ab174
DB
1846 if (strchr(ref->name, '^'))
1847 continue; /* a dereference item */
e928213f 1848 if (match_name_with_pattern(refspec->src, ref->name,
f8fb971e
JH
1849 refspec->dst, &expn_name) &&
1850 !ignore_symref_update(expn_name)) {
d71ab174 1851 struct ref *cpy = copy_ref(ref);
d71ab174 1852
e928213f 1853 cpy->peer_ref = alloc_ref(expn_name);
d71ab174
DB
1854 if (refspec->force)
1855 cpy->peer_ref->force = 1;
1856 *tail = cpy;
1857 tail = &cpy->next;
1858 }
e31a17f7 1859 free(expn_name);
d71ab174
DB
1860 }
1861
1862 return ret;
1863}
1864
4577370e 1865static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 1866{
4577370e 1867 const struct ref *ref;
d71ab174 1868 for (ref = refs; ref; ref = ref->next) {
54457fe5 1869 if (refname_match(name, ref->name))
d71ab174
DB
1870 return ref;
1871 }
1872 return NULL;
1873}
1874
4577370e 1875struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 1876{
4577370e 1877 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
1878
1879 if (!ref)
9ad7c5ae 1880 return NULL;
d71ab174
DB
1881
1882 return copy_ref(ref);
1883}
1884
1885static struct ref *get_local_ref(const char *name)
1886{
3eb96997 1887 if (!name || name[0] == '\0')
d71ab174
DB
1888 return NULL;
1889
59556548 1890 if (starts_with(name, "refs/"))
59c69c0c 1891 return alloc_ref(name);
d71ab174 1892
59556548
CC
1893 if (starts_with(name, "heads/") ||
1894 starts_with(name, "tags/") ||
1895 starts_with(name, "remotes/"))
8009768e 1896 return alloc_ref_with_prefix("refs/", 5, name);
d71ab174 1897
8009768e 1898 return alloc_ref_with_prefix("refs/heads/", 11, name);
d71ab174
DB
1899}
1900
4577370e 1901int get_fetch_map(const struct ref *remote_refs,
d71ab174 1902 const struct refspec *refspec,
9ad7c5ae
JH
1903 struct ref ***tail,
1904 int missing_ok)
d71ab174 1905{
ef00d150 1906 struct ref *ref_map, **rmp;
d71ab174
DB
1907
1908 if (refspec->pattern) {
1909 ref_map = get_expanded_map(remote_refs, refspec);
1910 } else {
9ad7c5ae
JH
1911 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1912
6e7b66ee
JH
1913 if (refspec->exact_sha1) {
1914 ref_map = alloc_ref(name);
f4e54d02 1915 get_oid_hex(name, &ref_map->old_oid);
6e7b66ee
JH
1916 } else {
1917 ref_map = get_remote_ref(remote_refs, name);
1918 }
9ad7c5ae
JH
1919 if (!missing_ok && !ref_map)
1920 die("Couldn't find remote ref %s", name);
1921 if (ref_map) {
1922 ref_map->peer_ref = get_local_ref(refspec->dst);
1923 if (ref_map->peer_ref && refspec->force)
1924 ref_map->peer_ref->force = 1;
1925 }
d71ab174
DB
1926 }
1927
ef00d150
DB
1928 for (rmp = &ref_map; *rmp; ) {
1929 if ((*rmp)->peer_ref) {
59556548 1930 if (!starts_with((*rmp)->peer_ref->name, "refs/") ||
5c08c1f2 1931 check_refname_format((*rmp)->peer_ref->name, 0)) {
ef00d150
DB
1932 struct ref *ignore = *rmp;
1933 error("* Ignoring funny ref '%s' locally",
1934 (*rmp)->peer_ref->name);
1935 *rmp = (*rmp)->next;
1936 free(ignore->peer_ref);
1937 free(ignore);
1938 continue;
1939 }
1940 }
1941 rmp = &((*rmp)->next);
d71ab174
DB
1942 }
1943
8f70a765
AR
1944 if (ref_map)
1945 tail_link_ref(ref_map, tail);
d71ab174
DB
1946
1947 return 0;
1948}
be885d96
DB
1949
1950int resolve_remote_symref(struct ref *ref, struct ref *list)
1951{
1952 if (!ref->symref)
1953 return 0;
1954 for (; list; list = list->next)
1955 if (!strcmp(ref->symref, list->name)) {
f4e54d02 1956 oidcpy(&ref->old_oid, &list->old_oid);
be885d96
DB
1957 return 0;
1958 }
1959 return 1;
1960}
6d21bf96 1961
ec8452d5
JS
1962static void unmark_and_free(struct commit_list *list, unsigned int mark)
1963{
1964 while (list) {
e510ab89
RS
1965 struct commit *commit = pop_commit(&list);
1966 commit->object.flags &= ~mark;
ec8452d5
JS
1967 }
1968}
1969
6f3d57b6 1970int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid)
ec8452d5
JS
1971{
1972 struct object *o;
1973 struct commit *old, *new;
1974 struct commit_list *list, *used;
1975 int found = 0;
1976
75e5c0dc
JH
1977 /*
1978 * Both new and old must be commit-ish and new is descendant of
ec8452d5
JS
1979 * old. Otherwise we require --force.
1980 */
c251c83d 1981 o = deref_tag(parse_object(old_oid), NULL, 0);
ec8452d5
JS
1982 if (!o || o->type != OBJ_COMMIT)
1983 return 0;
1984 old = (struct commit *) o;
1985
c251c83d 1986 o = deref_tag(parse_object(new_oid), NULL, 0);
ec8452d5
JS
1987 if (!o || o->type != OBJ_COMMIT)
1988 return 0;
1989 new = (struct commit *) o;
1990
1991 if (parse_commit(new) < 0)
1992 return 0;
1993
1994 used = list = NULL;
1995 commit_list_insert(new, &list);
1996 while (list) {
1997 new = pop_most_recent_commit(&list, TMP_MARK);
1998 commit_list_insert(new, &used);
1999 if (new == old) {
2000 found = 1;
2001 break;
2002 }
2003 }
2004 unmark_and_free(list, TMP_MARK);
2005 unmark_and_free(used, TMP_MARK);
2006 return found;
2007}
2008
6d21bf96 2009/*
f2e08739 2010 * Compare a branch with its upstream, and save their differences (number
979cb245
JK
2011 * of commits) in *num_ours and *num_theirs. The name of the upstream branch
2012 * (or NULL if no upstream is defined) is returned via *upstream_name, if it
2013 * is not itself NULL.
f2e08739 2014 *
979cb245
JK
2015 * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
2016 * upstream defined, or ref does not exist), 0 otherwise.
6d21bf96 2017 */
979cb245
JK
2018int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
2019 const char **upstream_name)
6d21bf96 2020{
fcd30b13 2021 struct object_id oid;
6d21bf96 2022 struct commit *ours, *theirs;
6d21bf96 2023 struct rev_info revs;
0b282cc4
JK
2024 const char *base;
2025 struct argv_array argv = ARGV_ARRAY_INIT;
6d21bf96 2026
f2e08739 2027 /* Cannot stat unless we are marked to build on top of somebody else. */
3a429d0a 2028 base = branch_get_upstream(branch, NULL);
979cb245
JK
2029 if (upstream_name)
2030 *upstream_name = base;
a9f9f8cc 2031 if (!base)
979cb245 2032 return -1;
6d21bf96 2033
f2e08739 2034 /* Cannot stat if what we used to build on no longer exists */
34c290a6 2035 if (read_ref(base, &oid))
f2e08739 2036 return -1;
bc83266a 2037 theirs = lookup_commit_reference(&oid);
6d21bf96 2038 if (!theirs)
f2e08739 2039 return -1;
6d21bf96 2040
34c290a6 2041 if (read_ref(branch->refname, &oid))
f2e08739 2042 return -1;
bc83266a 2043 ours = lookup_commit_reference(&oid);
6d21bf96 2044 if (!ours)
f2e08739 2045 return -1;
6d21bf96
JH
2046
2047 /* are we the same? */
f2e08739
JX
2048 if (theirs == ours) {
2049 *num_theirs = *num_ours = 0;
979cb245 2050 return 0;
f2e08739 2051 }
6d21bf96 2052
8fbf879e 2053 /* Run "rev-list --left-right ours...theirs" internally... */
0b282cc4
JK
2054 argv_array_push(&argv, ""); /* ignored */
2055 argv_array_push(&argv, "--left-right");
2056 argv_array_pushf(&argv, "%s...%s",
f2fd0760 2057 oid_to_hex(&ours->object.oid),
2058 oid_to_hex(&theirs->object.oid));
0b282cc4 2059 argv_array_push(&argv, "--");
6d21bf96
JH
2060
2061 init_revisions(&revs, NULL);
0b282cc4 2062 setup_revisions(argv.argc, argv.argv, &revs, NULL);
81c3ce3c
SB
2063 if (prepare_revision_walk(&revs))
2064 die("revision walk setup failed");
6d21bf96
JH
2065
2066 /* ... and count the commits on each side. */
2067 *num_ours = 0;
2068 *num_theirs = 0;
2069 while (1) {
2070 struct commit *c = get_revision(&revs);
2071 if (!c)
2072 break;
2073 if (c->object.flags & SYMMETRIC_LEFT)
2074 (*num_ours)++;
2075 else
2076 (*num_theirs)++;
2077 }
c0234b2e
JH
2078
2079 /* clear object flags smudged by the above traversal */
2080 clear_commit_marks(ours, ALL_REV_FLAGS);
2081 clear_commit_marks(theirs, ALL_REV_FLAGS);
0b282cc4
JK
2082
2083 argv_array_clear(&argv);
979cb245 2084 return 0;
6d21bf96
JH
2085}
2086
2087/*
2088 * Return true when there is anything to report, otherwise false.
2089 */
2090int format_tracking_info(struct branch *branch, struct strbuf *sb)
2091{
f2e08739 2092 int ours, theirs;
979cb245 2093 const char *full_base;
2f50babe 2094 char *base;
f2e08739 2095 int upstream_is_gone = 0;
6d21bf96 2096
979cb245
JK
2097 if (stat_tracking_info(branch, &ours, &theirs, &full_base) < 0) {
2098 if (!full_base)
2099 return 0;
f2e08739 2100 upstream_is_gone = 1;
f2e08739 2101 }
6d21bf96 2102
979cb245 2103 base = shorten_unambiguous_ref(full_base, 0);
f2e08739
JX
2104 if (upstream_is_gone) {
2105 strbuf_addf(sb,
2106 _("Your branch is based on '%s', but the upstream is gone.\n"),
2107 base);
2108 if (advice_status_hints)
a22ae753 2109 strbuf_addstr(sb,
f2e08739 2110 _(" (use \"git branch --unset-upstream\" to fixup)\n"));
f223459b
JX
2111 } else if (!ours && !theirs) {
2112 strbuf_addf(sb,
7560f547 2113 _("Your branch is up to date with '%s'.\n"),
f223459b 2114 base);
f2e08739 2115 } else if (!theirs) {
8a5b7494
JX
2116 strbuf_addf(sb,
2117 Q_("Your branch is ahead of '%s' by %d commit.\n",
2118 "Your branch is ahead of '%s' by %d commits.\n",
f2e08739
JX
2119 ours),
2120 base, ours);
491e3075 2121 if (advice_status_hints)
a22ae753 2122 strbuf_addstr(sb,
491e3075 2123 _(" (use \"git push\" to publish your local commits)\n"));
f2e08739 2124 } else if (!ours) {
8a5b7494
JX
2125 strbuf_addf(sb,
2126 Q_("Your branch is behind '%s' by %d commit, "
2127 "and can be fast-forwarded.\n",
2128 "Your branch is behind '%s' by %d commits, "
2129 "and can be fast-forwarded.\n",
f2e08739
JX
2130 theirs),
2131 base, theirs);
491e3075 2132 if (advice_status_hints)
a22ae753 2133 strbuf_addstr(sb,
491e3075 2134 _(" (use \"git pull\" to update your local branch)\n"));
c190ced6 2135 } else {
8a5b7494
JX
2136 strbuf_addf(sb,
2137 Q_("Your branch and '%s' have diverged,\n"
2138 "and have %d and %d different commit each, "
2139 "respectively.\n",
2140 "Your branch and '%s' have diverged,\n"
2141 "and have %d and %d different commits each, "
2142 "respectively.\n",
f54bea44 2143 ours + theirs),
f2e08739 2144 base, ours, theirs);
491e3075 2145 if (advice_status_hints)
a22ae753 2146 strbuf_addstr(sb,
491e3075 2147 _(" (use \"git pull\" to merge the remote branch into yours)\n"));
c190ced6 2148 }
2f50babe 2149 free(base);
6d21bf96
JH
2150 return 1;
2151}
454e2025 2152
455ade65
MH
2153static int one_local_ref(const char *refname, const struct object_id *oid,
2154 int flag, void *cb_data)
454e2025
JS
2155{
2156 struct ref ***local_tail = cb_data;
2157 struct ref *ref;
454e2025
JS
2158
2159 /* we already know it starts with refs/ to get here */
8d9c5010 2160 if (check_refname_format(refname + 5, 0))
454e2025
JS
2161 return 0;
2162
96ffc06f 2163 ref = alloc_ref(refname);
f4e54d02 2164 oidcpy(&ref->new_oid, oid);
454e2025
JS
2165 **local_tail = ref;
2166 *local_tail = &ref->next;
2167 return 0;
2168}
2169
2170struct ref *get_local_heads(void)
2171{
55f0566f 2172 struct ref *local_refs = NULL, **local_tail = &local_refs;
2b2a5be3 2173
454e2025
JS
2174 for_each_ref(one_local_ref, &local_tail);
2175 return local_refs;
2176}
8ef51733 2177
4229f1fa
JS
2178struct ref *guess_remote_head(const struct ref *head,
2179 const struct ref *refs,
2180 int all)
8ef51733 2181{
8ef51733 2182 const struct ref *r;
4229f1fa
JS
2183 struct ref *list = NULL;
2184 struct ref **tail = &list;
8ef51733 2185
6cb4e6cc 2186 if (!head)
8ef51733
JS
2187 return NULL;
2188
fbb074c2
JK
2189 /*
2190 * Some transports support directly peeking at
2191 * where HEAD points; if that is the case, then
2192 * we don't have to guess.
2193 */
2194 if (head->symref)
2195 return copy_ref(find_ref_by_name(refs, head->symref));
2196
8ef51733 2197 /* If refs/heads/master could be right, it is. */
4229f1fa
JS
2198 if (!all) {
2199 r = find_ref_by_name(refs, "refs/heads/master");
f4e54d02 2200 if (r && !oidcmp(&r->old_oid, &head->old_oid))
4229f1fa
JS
2201 return copy_ref(r);
2202 }
8ef51733
JS
2203
2204 /* Look for another ref that points there */
4229f1fa 2205 for (r = refs; r; r = r->next) {
61adfd30 2206 if (r != head &&
59556548 2207 starts_with(r->name, "refs/heads/") &&
f4e54d02 2208 !oidcmp(&r->old_oid, &head->old_oid)) {
4229f1fa
JS
2209 *tail = copy_ref(r);
2210 tail = &((*tail)->next);
2211 if (!all)
2212 break;
2213 }
2214 }
8ef51733 2215
4229f1fa 2216 return list;
8ef51733 2217}
f2ef6075
JS
2218
2219struct stale_heads_info {
f2ef6075
JS
2220 struct string_list *ref_names;
2221 struct ref **stale_refs_tail;
ed43de6e
CMN
2222 struct refspec *refs;
2223 int ref_count;
f2ef6075
JS
2224};
2225
455ade65
MH
2226static int get_stale_heads_cb(const char *refname, const struct object_id *oid,
2227 int flags, void *cb_data)
f2ef6075
JS
2228{
2229 struct stale_heads_info *info = cb_data;
e6f63712 2230 struct string_list matches = STRING_LIST_INIT_DUP;
ed43de6e 2231 struct refspec query;
e6f63712 2232 int i, stale = 1;
ed43de6e
CMN
2233 memset(&query, 0, sizeof(struct refspec));
2234 query.dst = (char *)refname;
2235
e6f63712
CMN
2236 query_refspecs_multiple(info->refs, info->ref_count, &query, &matches);
2237 if (matches.nr == 0)
2238 goto clean_exit; /* No matches */
ed43de6e
CMN
2239
2240 /*
2241 * If we did find a suitable refspec and it's not a symref and
2242 * it's not in the list of refs that currently exist in that
e6f63712
CMN
2243 * remote, we consider it to be stale. In order to deal with
2244 * overlapping refspecs, we need to go over all of the
2245 * matching refs.
ed43de6e 2246 */
e6f63712
CMN
2247 if (flags & REF_ISSYMREF)
2248 goto clean_exit;
2249
2250 for (i = 0; stale && i < matches.nr; i++)
2251 if (string_list_has_string(info->ref_names, matches.items[i].string))
2252 stale = 0;
2253
2254 if (stale) {
ed43de6e 2255 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
f4e54d02 2256 oidcpy(&ref->new_oid, oid);
f2ef6075 2257 }
ed43de6e 2258
e6f63712
CMN
2259clean_exit:
2260 string_list_clear(&matches, 0);
f2ef6075
JS
2261 return 0;
2262}
2263
ed43de6e 2264struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map)
f2ef6075
JS
2265{
2266 struct ref *ref, *stale_refs = NULL;
183113a5 2267 struct string_list ref_names = STRING_LIST_INIT_NODUP;
f2ef6075 2268 struct stale_heads_info info;
2b2a5be3 2269
f2ef6075
JS
2270 info.ref_names = &ref_names;
2271 info.stale_refs_tail = &stale_refs;
ed43de6e
CMN
2272 info.refs = refs;
2273 info.ref_count = ref_count;
f2ef6075 2274 for (ref = fetch_map; ref; ref = ref->next)
1d2f80fa 2275 string_list_append(&ref_names, ref->name);
3383e199 2276 string_list_sort(&ref_names);
f2ef6075
JS
2277 for_each_ref(get_stale_heads_cb, &info);
2278 string_list_clear(&ref_names, 0);
2279 return stale_refs;
2280}
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2281
2282/*
2283 * Compare-and-swap
2284 */
a355b11d 2285static void clear_cas_option(struct push_cas_option *cas)
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2286{
2287 int i;
2288
2289 for (i = 0; i < cas->nr; i++)
2290 free(cas->entry[i].refname);
2291 free(cas->entry);
2292 memset(cas, 0, sizeof(*cas));
2293}
2294
2295static struct push_cas *add_cas_entry(struct push_cas_option *cas,
2296 const char *refname,
2297 size_t refnamelen)
2298{
2299 struct push_cas *entry;
2300 ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc);
2301 entry = &cas->entry[cas->nr++];
2302 memset(entry, 0, sizeof(*entry));
2303 entry->refname = xmemdupz(refname, refnamelen);
2304 return entry;
2305}
2306
8668976b 2307static int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
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2308{
2309 const char *colon;
2310 struct push_cas *entry;
2311
2312 if (unset) {
2313 /* "--no-<option>" */
2314 clear_cas_option(cas);
2315 return 0;
2316 }
2317
2318 if (!arg) {
2319 /* just "--<option>" */
2320 cas->use_tracking_for_rest = 1;
2321 return 0;
2322 }
2323
2324 /* "--<option>=refname" or "--<option>=refname:value" */
2325 colon = strchrnul(arg, ':');
2326 entry = add_cas_entry(cas, arg, colon - arg);
2327 if (!*colon)
2328 entry->use_tracking = 1;
eee98e74 2329 else if (!colon[1])
b8566f8f 2330 oidclr(&entry->expect);
2331 else if (get_oid(colon + 1, &entry->expect))
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2332 return error("cannot parse expected object name '%s'", colon + 1);
2333 return 0;
2334}
2335
2336int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset)
2337{
2338 return parse_push_cas_option(opt->value, arg, unset);
2339}
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2340
2341int is_empty_cas(const struct push_cas_option *cas)
2342{
2343 return !cas->use_tracking_for_rest && !cas->nr;
2344}
2345
2346/*
2347 * Look at remote.fetch refspec and see if we have a remote
2348 * tracking branch for the refname there. Fill its current
2349 * value in sha1[].
2350 * If we cannot do so, return negative to signal an error.
2351 */
2352static int remote_tracking(struct remote *remote, const char *refname,
fcd30b13 2353 struct object_id *oid)
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2354{
2355 char *dst;
2356
2357 dst = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
2358 if (!dst)
2359 return -1; /* no tracking ref for refname at remote */
34c290a6 2360 if (read_ref(dst, oid))
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2361 return -1; /* we know what the tracking ref is but we cannot read it */
2362 return 0;
2363}
2364
2365static void apply_cas(struct push_cas_option *cas,
2366 struct remote *remote,
2367 struct ref *ref)
2368{
2369 int i;
2370
2371 /* Find an explicit --<option>=<name>[:<value>] entry */
2372 for (i = 0; i < cas->nr; i++) {
2373 struct push_cas *entry = &cas->entry[i];
54457fe5 2374 if (!refname_match(entry->refname, ref->name))
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2375 continue;
2376 ref->expect_old_sha1 = 1;
2377 if (!entry->use_tracking)
b8566f8f 2378 oidcpy(&ref->old_oid_expect, &entry->expect);
fcd30b13 2379 else if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
64ac39af 2380 oidclr(&ref->old_oid_expect);
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2381 return;
2382 }
2383
2384 /* Are we using "--<option>" to cover all? */
2385 if (!cas->use_tracking_for_rest)
2386 return;
2387
2388 ref->expect_old_sha1 = 1;
fcd30b13 2389 if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
64ac39af 2390 oidclr(&ref->old_oid_expect);
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2391}
2392
2393void apply_push_cas(struct push_cas_option *cas,
2394 struct remote *remote,
2395 struct ref *remote_refs)
2396{
2397 struct ref *ref;
2398 for (ref = remote_refs; ref; ref = ref->next)
2399 apply_cas(cas, remote, ref);
2400}