http: allow selection of proxy authentication method
[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;
89cf4c70 258 remote->origin = REMOTE_REMOTES;
0e265a92
JK
259 while (strbuf_getline(&buf, f, '\n') != EOF) {
260 const char *v;
5751f490 261
0e265a92 262 strbuf_rtrim(&buf);
5751f490 263
0e265a92
JK
264 if (skip_prefix(buf.buf, "URL:", &v))
265 add_url_alias(remote, xstrdup(skip_spaces(v)));
266 else if (skip_prefix(buf.buf, "Push:", &v))
267 add_push_refspec(remote, xstrdup(skip_spaces(v)));
268 else if (skip_prefix(buf.buf, "Pull:", &v))
269 add_fetch_refspec(remote, xstrdup(skip_spaces(v)));
5751f490 270 }
0e265a92 271 strbuf_release(&buf);
5751f490
DB
272 fclose(f);
273}
274
275static void read_branches_file(struct remote *remote)
276{
cf818348 277 char *frag;
f28e3ab2
JK
278 struct strbuf buf = STRBUF_INIT;
279 FILE *f = fopen(git_path("branches/%s", remote->name), "r");
5751f490
DB
280
281 if (!f)
282 return;
f28e3ab2
JK
283
284 strbuf_getline(&buf, f, '\n');
0fb19906 285 fclose(f);
f28e3ab2
JK
286 strbuf_trim(&buf);
287 if (!buf.len) {
288 strbuf_release(&buf);
5751f490 289 return;
f28e3ab2
JK
290 }
291
89cf4c70 292 remote->origin = REMOTE_BRANCHES;
472fa4cd
DB
293
294 /*
55cfde25 295 * The branches file would have URL and optionally
472fa4cd 296 * #branch specified. The "master" (or specified) branch is
f28e3ab2
JK
297 * fetched and stored in the local branch matching the
298 * remote name.
472fa4cd 299 */
f28e3ab2
JK
300 frag = strchr(buf.buf, '#');
301 if (frag)
cf818348 302 *(frag++) = '\0';
f28e3ab2
JK
303 else
304 frag = "master";
305
306 add_url_alias(remote, strbuf_detach(&buf, NULL));
307 add_fetch_refspec(remote, xstrfmt("refs/heads/%s:refs/heads/%s",
308 frag, remote->name));
55cfde25 309
18afe101
MK
310 /*
311 * Cogito compatible push: push current HEAD to remote #branch
312 * (master if missing)
313 */
f28e3ab2 314 add_push_refspec(remote, xstrfmt("HEAD:refs/heads/%s", frag));
d71ab174 315 remote->fetch_tags = 1; /* always auto-follow */
5751f490
DB
316}
317
ef90d6d4 318static int handle_config(const char *key, const char *value, void *cb)
5751f490
DB
319{
320 const char *name;
321 const char *subkey;
322 struct remote *remote;
cf818348 323 struct branch *branch;
59556548 324 if (starts_with(key, "branch.")) {
cf818348
DB
325 name = key + 7;
326 subkey = strrchr(name, '.');
cf818348
DB
327 if (!subkey)
328 return 0;
896c0535 329 branch = make_branch(name, subkey - name);
cf818348 330 if (!strcmp(subkey, ".remote")) {
e41bf352 331 return git_config_string(&branch->remote_name, key, value);
9f765ce6 332 } else if (!strcmp(subkey, ".pushremote")) {
da66b274 333 return git_config_string(&branch->pushremote_name, key, value);
d2370cc2
JH
334 } else if (!strcmp(subkey, ".merge")) {
335 if (!value)
336 return config_error_nonbool(key);
cf818348 337 add_merge(branch, xstrdup(value));
d2370cc2 338 }
cf818348 339 return 0;
5751f490 340 }
59556548 341 if (starts_with(key, "url.")) {
55029ae4 342 struct rewrite *rewrite;
60e3aba9 343 name = key + 4;
55029ae4
DB
344 subkey = strrchr(name, '.');
345 if (!subkey)
346 return 0;
55029ae4 347 if (!strcmp(subkey, ".insteadof")) {
1c2eafb8
JT
348 rewrite = make_rewrite(&rewrites, name, subkey - name);
349 if (!value)
350 return config_error_nonbool(key);
351 add_instead_of(rewrite, xstrdup(value));
352 } else if (!strcmp(subkey, ".pushinsteadof")) {
353 rewrite = make_rewrite(&rewrites_push, name, subkey - name);
55029ae4
DB
354 if (!value)
355 return config_error_nonbool(key);
356 add_instead_of(rewrite, xstrdup(value));
357 }
358 }
224c2171 359
59556548 360 if (!starts_with(key, "remote."))
5751f490
DB
361 return 0;
362 name = key + 7;
224c2171
RR
363
364 /* Handle remote.* variables */
365 if (!strcmp(name, "pushdefault"))
366 return git_config_string(&pushremote_name, key, value);
367
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 }
5751f490
DB
374 subkey = strrchr(name, '.');
375 if (!subkey)
cd294bc3 376 return 0;
5751f490 377 remote = make_remote(name, subkey - name);
89cf4c70 378 remote->origin = REMOTE_CONFIG;
84bb2dfd
PB
379 if (!strcmp(subkey, ".mirror"))
380 remote->mirror = git_config_bool(key, value);
381 else if (!strcmp(subkey, ".skipdefaultupdate"))
382 remote->skip_default_update = git_config_bool(key, value);
7cc91a2f
BG
383 else if (!strcmp(subkey, ".skipfetchall"))
384 remote->skip_default_update = git_config_bool(key, value);
737c5a9c
MS
385 else if (!strcmp(subkey, ".prune"))
386 remote->prune = git_config_bool(key, value);
84bb2dfd
PB
387 else if (!strcmp(subkey, ".url")) {
388 const char *v;
389 if (git_config_string(&v, key, value))
390 return -1;
391 add_url(remote, v);
20346234
MG
392 } else if (!strcmp(subkey, ".pushurl")) {
393 const char *v;
394 if (git_config_string(&v, key, value))
395 return -1;
396 add_pushurl(remote, v);
5751f490 397 } else if (!strcmp(subkey, ".push")) {
84bb2dfd
PB
398 const char *v;
399 if (git_config_string(&v, key, value))
400 return -1;
401 add_push_refspec(remote, v);
5d46c9d4 402 } else if (!strcmp(subkey, ".fetch")) {
84bb2dfd
PB
403 const char *v;
404 if (git_config_string(&v, key, value))
405 return -1;
406 add_fetch_refspec(remote, v);
5751f490 407 } else if (!strcmp(subkey, ".receivepack")) {
84bb2dfd
PB
408 const char *v;
409 if (git_config_string(&v, key, value))
410 return -1;
5751f490 411 if (!remote->receivepack)
84bb2dfd 412 remote->receivepack = v;
5751f490
DB
413 else
414 error("more than one receivepack given, using the first");
0012ba21 415 } else if (!strcmp(subkey, ".uploadpack")) {
84bb2dfd
PB
416 const char *v;
417 if (git_config_string(&v, key, value))
418 return -1;
0012ba21 419 if (!remote->uploadpack)
84bb2dfd 420 remote->uploadpack = v;
0012ba21
DB
421 else
422 error("more than one uploadpack given, using the first");
d71ab174
DB
423 } else if (!strcmp(subkey, ".tagopt")) {
424 if (!strcmp(value, "--no-tags"))
425 remote->fetch_tags = -1;
944163a4
ST
426 else if (!strcmp(value, "--tags"))
427 remote->fetch_tags = 2;
14c98218 428 } else if (!strcmp(subkey, ".proxy")) {
84bb2dfd
PB
429 return git_config_string((const char **)&remote->http_proxy,
430 key, value);
ef976395
KF
431 } else if (!strcmp(subkey, ".proxyauthmethod")) {
432 return git_config_string((const char **)&remote->http_proxy_authmethod,
433 key, value);
c578f51d
DB
434 } else if (!strcmp(subkey, ".vcs")) {
435 return git_config_string(&remote->foreign_vcs, key, value);
84bb2dfd 436 }
5751f490
DB
437 return 0;
438}
439
55029ae4
DB
440static void alias_all_urls(void)
441{
442 int i, j;
443 for (i = 0; i < remotes_nr; i++) {
1c2eafb8 444 int add_pushurl_aliases;
55029ae4
DB
445 if (!remotes[i])
446 continue;
20346234 447 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
d071d942 448 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
20346234 449 }
1c2eafb8
JT
450 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
451 for (j = 0; j < remotes[i]->url_nr; j++) {
452 if (add_pushurl_aliases)
453 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
454 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
455 }
55029ae4
DB
456 }
457}
458
5751f490
DB
459static void read_config(void)
460{
e41bf352 461 static int loaded;
fcd30b13 462 struct object_id oid;
5751f490
DB
463 const char *head_ref;
464 int flag;
e41bf352
JK
465
466 if (loaded)
5751f490 467 return;
e41bf352
JK
468 loaded = 1;
469
5751f490 470 current_branch = NULL;
fcd30b13 471 head_ref = resolve_ref_unsafe("HEAD", 0, oid.hash, &flag);
5751f490 472 if (head_ref && (flag & REF_ISSYMREF) &&
95b567c7
JK
473 skip_prefix(head_ref, "refs/heads/", &head_ref)) {
474 current_branch = make_branch(head_ref, 0);
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
697d7f5d 633static struct 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);
df93e33c 696 if (valid_remote_nick(name)) {
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
9a23ba33
FAG
721int remote_is_configured(const char *name)
722{
d0da003d
PR
723 struct remotes_hash_key lookup;
724 struct hashmap_entry lookup_entry;
9a23ba33
FAG
725 read_config();
726
d0da003d
PR
727 init_remotes_hash();
728 lookup.str = name;
729 lookup.len = strlen(name);
730 hashmap_entry_init(&lookup_entry, memhash(name, lookup.len));
731
732 return hashmap_get(&remotes_hash, &lookup_entry, &lookup) != NULL;
9a23ba33
FAG
733}
734
b42f6927
JS
735int for_each_remote(each_remote_fn fn, void *priv)
736{
737 int i, result = 0;
738 read_config();
2d31347b 739 for (i = 0; i < remotes_nr && !result; i++) {
b42f6927
JS
740 struct remote *r = remotes[i];
741 if (!r)
742 continue;
743 if (!r->fetch)
46220ca1
JH
744 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
745 r->fetch_refspec);
b42f6927 746 if (!r->push)
46220ca1
JH
747 r->push = parse_push_refspec(r->push_refspec_nr,
748 r->push_refspec);
b42f6927
JS
749 result = fn(r, priv);
750 }
751 return result;
752}
753
df02ebda
MH
754static void handle_duplicate(struct ref *ref1, struct ref *ref2)
755{
f096e6e8
MH
756 if (strcmp(ref1->name, ref2->name)) {
757 if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
758 ref2->fetch_head_status != FETCH_HEAD_IGNORE) {
759 die(_("Cannot fetch both %s and %s to %s"),
760 ref1->name, ref2->name, ref2->peer_ref->name);
761 } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
762 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
763 warning(_("%s usually tracks %s, not %s"),
764 ref2->peer_ref->name, ref2->name, ref1->name);
765 } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE &&
766 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
767 die(_("%s tracks both %s and %s"),
768 ref2->peer_ref->name, ref1->name, ref2->name);
769 } else {
770 /*
771 * This last possibility doesn't occur because
772 * FETCH_HEAD_IGNORE entries always appear at
773 * the end of the list.
774 */
775 die(_("Internal error"));
776 }
777 }
df02ebda
MH
778 free(ref2->peer_ref);
779 free(ref2);
780}
781
b9afe665 782struct ref *ref_remove_duplicates(struct ref *ref_map)
2467a4fa 783{
183113a5 784 struct string_list refs = STRING_LIST_INIT_NODUP;
b9afe665
MH
785 struct ref *retval = NULL;
786 struct ref **p = &retval;
73cf0822 787
b9afe665
MH
788 while (ref_map) {
789 struct ref *ref = ref_map;
790
791 ref_map = ref_map->next;
792 ref->next = NULL;
73cf0822 793
b9afe665
MH
794 if (!ref->peer_ref) {
795 *p = ref;
796 p = &ref->next;
09ea1f8e 797 } else {
b9afe665
MH
798 struct string_list_item *item =
799 string_list_insert(&refs, ref->peer_ref->name);
800
801 if (item->util) {
802 /* Entry already existed */
df02ebda 803 handle_duplicate((struct ref *)item->util, ref);
b9afe665
MH
804 } else {
805 *p = ref;
806 p = &ref->next;
807 item->util = ref;
808 }
2467a4fa
DB
809 }
810 }
b9afe665 811
73cf0822 812 string_list_clear(&refs, 0);
b9afe665 813 return retval;
2467a4fa
DB
814}
815
28b91f8a 816int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
817{
818 int i;
28b91f8a
SP
819 for (i = 0; i < remote->url_nr; i++) {
820 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
821 return 1;
822 }
823 return 0;
824}
825
e928213f
DB
826static int match_name_with_pattern(const char *key, const char *name,
827 const char *value, char **result)
a3c84239 828{
08fbdb30
DB
829 const char *kstar = strchr(key, '*');
830 size_t klen;
abd2bde7
DB
831 size_t ksuffixlen;
832 size_t namelen;
08fbdb30
DB
833 int ret;
834 if (!kstar)
835 die("Key '%s' of pattern had no '*'", key);
836 klen = kstar - key;
abd2bde7
DB
837 ksuffixlen = strlen(kstar + 1);
838 namelen = strlen(name);
839 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
840 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
e928213f 841 if (ret && value) {
07bfa575 842 struct strbuf sb = STRBUF_INIT;
08fbdb30 843 const char *vstar = strchr(value, '*');
08fbdb30
DB
844 if (!vstar)
845 die("Value '%s' of pattern has no '*'", value);
07bfa575
RS
846 strbuf_add(&sb, value, vstar - value);
847 strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen);
848 strbuf_addstr(&sb, vstar + 1);
849 *result = strbuf_detach(&sb, NULL);
e928213f 850 }
a3c84239
DB
851 return ret;
852}
853
e6f63712
CMN
854static void query_refspecs_multiple(struct refspec *refs, int ref_count, struct refspec *query, struct string_list *results)
855{
856 int i;
857 int find_src = !query->src;
858
859 if (find_src && !query->dst)
860 error("query_refspecs_multiple: need either src or dst");
861
862 for (i = 0; i < ref_count; i++) {
863 struct refspec *refspec = &refs[i];
864 const char *key = find_src ? refspec->dst : refspec->src;
865 const char *value = find_src ? refspec->src : refspec->dst;
866 const char *needle = find_src ? query->dst : query->src;
867 char **result = find_src ? &query->src : &query->dst;
868
869 if (!refspec->dst)
870 continue;
871 if (refspec->pattern) {
872 if (match_name_with_pattern(key, needle, value, result))
873 string_list_append_nodup(results, *result);
874 } else if (!strcmp(needle, key)) {
875 string_list_append(results, value);
876 }
877 }
878}
879
ca02465b 880int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
72ff8943
DB
881{
882 int i;
c500352e 883 int find_src = !query->src;
049bff8f
MH
884 const char *needle = find_src ? query->dst : query->src;
885 char **result = find_src ? &query->src : &query->dst;
72ff8943 886
c500352e
CMN
887 if (find_src && !query->dst)
888 return error("query_refspecs: need either src or dst");
b42f6927 889
c500352e
CMN
890 for (i = 0; i < ref_count; i++) {
891 struct refspec *refspec = &refs[i];
892 const char *key = find_src ? refspec->dst : refspec->src;
893 const char *value = find_src ? refspec->src : refspec->dst;
b42f6927 894
c500352e 895 if (!refspec->dst)
5d46c9d4 896 continue;
c500352e 897 if (refspec->pattern) {
e928213f 898 if (match_name_with_pattern(key, needle, value, result)) {
c500352e 899 query->force = refspec->force;
5d46c9d4
DB
900 return 0;
901 }
b42f6927
JS
902 } else if (!strcmp(needle, key)) {
903 *result = xstrdup(value);
c500352e 904 query->force = refspec->force;
b42f6927 905 return 0;
5d46c9d4
DB
906 }
907 }
5d46c9d4
DB
908 return -1;
909}
910
c500352e
CMN
911char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
912 const char *name)
913{
914 struct refspec query;
915
916 memset(&query, 0, sizeof(struct refspec));
917 query.src = (char *)name;
918
919 if (query_refspecs(refspecs, nr_refspec, &query))
920 return NULL;
921
922 return query.dst;
923}
924
925int remote_find_tracking(struct remote *remote, struct refspec *refspec)
926{
927 return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
928}
929
8009768e
RS
930static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
931 const char *name)
932{
933 size_t len = strlen(name);
934 struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
935 memcpy(ref->name, prefix, prefixlen);
936 memcpy(ref->name + prefixlen, name, len);
937 return ref;
938}
939
59c69c0c 940struct ref *alloc_ref(const char *name)
dfd255dd 941{
59c69c0c 942 return alloc_ref_with_prefix("", 0, name);
737922aa
KK
943}
944
59a57757 945struct ref *copy_ref(const struct ref *ref)
d71ab174 946{
7b3db095
JS
947 struct ref *cpy;
948 size_t len;
949 if (!ref)
950 return NULL;
951 len = strlen(ref->name);
952 cpy = xmalloc(sizeof(struct ref) + len + 1);
953 memcpy(cpy, ref, sizeof(struct ref) + len + 1);
954 cpy->next = NULL;
8c53f071
JK
955 cpy->symref = xstrdup_or_null(ref->symref);
956 cpy->remote_status = xstrdup_or_null(ref->remote_status);
7b3db095
JS
957 cpy->peer_ref = copy_ref(ref->peer_ref);
958 return cpy;
d71ab174
DB
959}
960
4577370e
DB
961struct ref *copy_ref_list(const struct ref *ref)
962{
963 struct ref *ret = NULL;
964 struct ref **tail = &ret;
965 while (ref) {
966 *tail = copy_ref(ref);
967 ref = ref->next;
968 tail = &((*tail)->next);
969 }
970 return ret;
971}
972
697d7f5d 973static void free_ref(struct ref *ref)
be885d96
DB
974{
975 if (!ref)
976 return;
7b3db095 977 free_ref(ref->peer_ref);
be885d96
DB
978 free(ref->remote_status);
979 free(ref->symref);
980 free(ref);
981}
982
dfd255dd
DB
983void free_refs(struct ref *ref)
984{
985 struct ref *next;
986 while (ref) {
987 next = ref->next;
be885d96 988 free_ref(ref);
dfd255dd
DB
989 ref = next;
990 }
991}
992
ed81c76b
JK
993int ref_compare_name(const void *va, const void *vb)
994{
995 const struct ref *a = va, *b = vb;
996 return strcmp(a->name, b->name);
997}
998
999static void *ref_list_get_next(const void *a)
1000{
1001 return ((const struct ref *)a)->next;
1002}
1003
1004static void ref_list_set_next(void *a, void *next)
1005{
1006 ((struct ref *)a)->next = next;
1007}
1008
1009void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
1010{
1011 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
1012}
1013
ca02465b
JH
1014int count_refspec_match(const char *pattern,
1015 struct ref *refs,
1016 struct ref **matched_ref)
6b62816c
DB
1017{
1018 int patlen = strlen(pattern);
1019 struct ref *matched_weak = NULL;
1020 struct ref *matched = NULL;
1021 int weak_match = 0;
1022 int match = 0;
1023
1024 for (weak_match = match = 0; refs; refs = refs->next) {
1025 char *name = refs->name;
1026 int namelen = strlen(name);
6b62816c 1027
54457fe5 1028 if (!refname_match(pattern, name))
6b62816c
DB
1029 continue;
1030
1031 /* A match is "weak" if it is with refs outside
1032 * heads or tags, and did not specify the pattern
1033 * in full (e.g. "refs/remotes/origin/master") or at
1034 * least from the toplevel (e.g. "remotes/origin/master");
1035 * otherwise "git push $URL master" would result in
1036 * ambiguity between remotes/origin/master and heads/master
1037 * at the remote site.
1038 */
1039 if (namelen != patlen &&
1040 patlen != namelen - 5 &&
59556548
CC
1041 !starts_with(name, "refs/heads/") &&
1042 !starts_with(name, "refs/tags/")) {
6b62816c
DB
1043 /* We want to catch the case where only weak
1044 * matches are found and there are multiple
1045 * matches, and where more than one strong
1046 * matches are found, as ambiguous. One
1047 * strong match with zero or more weak matches
1048 * are acceptable as a unique match.
1049 */
1050 matched_weak = refs;
1051 weak_match++;
1052 }
1053 else {
1054 matched = refs;
1055 match++;
1056 }
1057 }
1058 if (!matched) {
471fd3fe
JK
1059 if (matched_ref)
1060 *matched_ref = matched_weak;
6b62816c
DB
1061 return weak_match;
1062 }
1063 else {
471fd3fe
JK
1064 if (matched_ref)
1065 *matched_ref = matched;
6b62816c
DB
1066 return match;
1067 }
1068}
1069
1d735267 1070static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
1071{
1072 **tail = ref;
1d735267
DB
1073 while (ref->next)
1074 ref = ref->next;
6b62816c 1075 *tail = &ref->next;
6b62816c
DB
1076}
1077
67655246
FC
1078static struct ref *alloc_delete_ref(void)
1079{
1080 struct ref *ref = alloc_ref("(delete)");
f4e54d02 1081 oidclr(&ref->new_oid);
67655246
FC
1082 return ref;
1083}
1084
471fd3fe
JK
1085static int try_explicit_object_name(const char *name,
1086 struct ref **match)
6b62816c 1087{
fcd30b13 1088 struct object_id oid;
6b62816c 1089
471fd3fe
JK
1090 if (!*name) {
1091 if (match)
1092 *match = alloc_delete_ref();
1093 return 0;
1094 }
1095
fcd30b13 1096 if (get_sha1(name, oid.hash))
471fd3fe
JK
1097 return -1;
1098
1099 if (match) {
1100 *match = alloc_ref(name);
fcd30b13 1101 oidcpy(&(*match)->new_oid, &oid);
471fd3fe
JK
1102 }
1103 return 0;
6b62816c
DB
1104}
1105
1d735267 1106static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 1107{
59c69c0c 1108 struct ref *ret = alloc_ref(name);
1d735267
DB
1109 tail_link_ref(ret, tail);
1110 return ret;
163f0ee5 1111}
8558fd9e 1112
f8aae120
JK
1113static char *guess_ref(const char *name, struct ref *peer)
1114{
1115 struct strbuf buf = STRBUF_INIT;
fcd30b13 1116 struct object_id oid;
f8aae120 1117
7695d118 1118 const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING,
fcd30b13 1119 oid.hash, NULL);
f8aae120
JK
1120 if (!r)
1121 return NULL;
1122
59556548 1123 if (starts_with(r, "refs/heads/"))
f8aae120 1124 strbuf_addstr(&buf, "refs/heads/");
59556548 1125 else if (starts_with(r, "refs/tags/"))
f8aae120
JK
1126 strbuf_addstr(&buf, "refs/tags/");
1127 else
1128 return NULL;
1129
1130 strbuf_addstr(&buf, name);
1131 return strbuf_detach(&buf, NULL);
1132}
1133
f7ade3d3
JK
1134static int match_explicit_lhs(struct ref *src,
1135 struct refspec *rs,
1136 struct ref **match,
1137 int *allocated_match)
1138{
1139 switch (count_refspec_match(rs->src, src, match)) {
1140 case 1:
471fd3fe
JK
1141 if (allocated_match)
1142 *allocated_match = 0;
f7ade3d3
JK
1143 return 0;
1144 case 0:
1145 /* The source could be in the get_sha1() format
1146 * not a reference name. :refs/other is a
1147 * way to delete 'other' ref at the remote end.
1148 */
471fd3fe 1149 if (try_explicit_object_name(rs->src, match) < 0)
f7ade3d3 1150 return error("src refspec %s does not match any.", rs->src);
471fd3fe
JK
1151 if (allocated_match)
1152 *allocated_match = 1;
f7ade3d3
JK
1153 return 0;
1154 default:
1155 return error("src refspec %s matches more than one.", rs->src);
1156 }
1157}
1158
54a8ad92
JH
1159static int match_explicit(struct ref *src, struct ref *dst,
1160 struct ref ***dst_tail,
9a7bbd1d 1161 struct refspec *rs)
6b62816c 1162{
54a8ad92 1163 struct ref *matched_src, *matched_dst;
f7ade3d3 1164 int allocated_src;
8558fd9e 1165
54a8ad92 1166 const char *dst_value = rs->dst;
f8aae120 1167 char *dst_guess;
6b62816c 1168
a83619d6 1169 if (rs->pattern || rs->matching)
9a7bbd1d 1170 return 0;
8558fd9e 1171
54a8ad92 1172 matched_src = matched_dst = NULL;
f7ade3d3
JK
1173 if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0)
1174 return -1;
3c8b7df1 1175
4491e62a 1176 if (!dst_value) {
fcd30b13 1177 struct object_id oid;
9f0ea7e8
DB
1178 int flag;
1179
7695d118
RS
1180 dst_value = resolve_ref_unsafe(matched_src->name,
1181 RESOLVE_REF_READING,
fcd30b13 1182 oid.hash, &flag);
9f0ea7e8
DB
1183 if (!dst_value ||
1184 ((flag & REF_ISSYMREF) &&
59556548 1185 !starts_with(dst_value, "refs/heads/")))
9f0ea7e8
DB
1186 die("%s cannot be resolved to branch.",
1187 matched_src->name);
4491e62a 1188 }
3c8b7df1 1189
54a8ad92
JH
1190 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1191 case 1:
1192 break;
1193 case 0:
50e19a83 1194 if (starts_with(dst_value, "refs/"))
1d735267 1195 matched_dst = make_linked_ref(dst_value, dst_tail);
f4e54d02 1196 else if (is_null_oid(&matched_src->new_oid))
5742c82b
JK
1197 error("unable to delete '%s': remote ref does not exist",
1198 dst_value);
eeefa7c9 1199 else if ((dst_guess = guess_ref(dst_value, matched_src)))
f8aae120 1200 matched_dst = make_linked_ref(dst_guess, dst_tail);
3c8b7df1 1201 else
f8aae120
JK
1202 error("unable to push to unqualified destination: %s\n"
1203 "The destination refspec neither matches an "
1204 "existing ref on the remote nor\n"
1205 "begins with refs/, and we are unable to "
1206 "guess a prefix based on the source ref.",
1207 dst_value);
54a8ad92
JH
1208 break;
1209 default:
3c8b7df1 1210 matched_dst = NULL;
54a8ad92
JH
1211 error("dst refspec %s matches more than one.",
1212 dst_value);
1213 break;
1214 }
9a7bbd1d
JK
1215 if (!matched_dst)
1216 return -1;
1217 if (matched_dst->peer_ref)
1218 return error("dst ref %s receives from more than one src.",
54a8ad92 1219 matched_dst->name);
54a8ad92 1220 else {
f7ade3d3
JK
1221 matched_dst->peer_ref = allocated_src ?
1222 matched_src :
1223 copy_ref(matched_src);
54a8ad92 1224 matched_dst->force = rs->force;
6b62816c 1225 }
9a7bbd1d 1226 return 0;
54a8ad92
JH
1227}
1228
1229static int match_explicit_refs(struct ref *src, struct ref *dst,
1230 struct ref ***dst_tail, struct refspec *rs,
1231 int rs_nr)
1232{
1233 int i, errs;
1234 for (i = errs = 0; i < rs_nr; i++)
9a7bbd1d
JK
1235 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1236 return errs;
6b62816c
DB
1237}
1238
db70a04c 1239static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
6ddba5e2 1240 int send_mirror, int direction, const struct refspec **ret_pat)
8558fd9e 1241{
db70a04c
FC
1242 const struct refspec *pat;
1243 char *name;
8558fd9e 1244 int i;
a83619d6 1245 int matching_refs = -1;
8558fd9e 1246 for (i = 0; i < rs_nr; i++) {
a83619d6
PB
1247 if (rs[i].matching &&
1248 (matching_refs == -1 || rs[i].force)) {
1249 matching_refs = i;
1250 continue;
1251 }
1252
db70a04c
FC
1253 if (rs[i].pattern) {
1254 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
6ddba5e2
FC
1255 int match;
1256 if (direction == FROM_SRC)
1257 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1258 else
1259 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1260 if (match) {
db70a04c
FC
1261 matching_refs = i;
1262 break;
1263 }
1264 }
8558fd9e 1265 }
db70a04c 1266 if (matching_refs == -1)
a83619d6 1267 return NULL;
db70a04c
FC
1268
1269 pat = rs + matching_refs;
1270 if (pat->matching) {
1271 /*
1272 * "matching refs"; traditionally we pushed everything
1273 * including refs outside refs/heads/ hierarchy, but
1274 * that does not make much sense these days.
1275 */
59556548 1276 if (!send_mirror && !starts_with(ref->name, "refs/heads/"))
db70a04c
FC
1277 return NULL;
1278 name = xstrdup(ref->name);
1279 }
1280 if (ret_pat)
1281 *ret_pat = pat;
1282 return name;
8558fd9e
DB
1283}
1284
6d2bf96e
CB
1285static struct ref **tail_ref(struct ref **head)
1286{
1287 struct ref **tail = head;
1288 while (*tail)
1289 tail = &((*tail)->next);
1290 return tail;
1291}
1292
c2aba155
JH
1293struct tips {
1294 struct commit **tip;
1295 int nr, alloc;
1296};
1297
fcd30b13 1298static void add_to_tips(struct tips *tips, const struct object_id *oid)
c2aba155
JH
1299{
1300 struct commit *commit;
1301
fcd30b13 1302 if (is_null_oid(oid))
c2aba155 1303 return;
fcd30b13 1304 commit = lookup_commit_reference_gently(oid->hash, 1);
c2aba155
JH
1305 if (!commit || (commit->object.flags & TMP_MARK))
1306 return;
1307 commit->object.flags |= TMP_MARK;
1308 ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc);
1309 tips->tip[tips->nr++] = commit;
1310}
1311
1312static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
1313{
1314 struct string_list dst_tag = STRING_LIST_INIT_NODUP;
1315 struct string_list src_tag = STRING_LIST_INIT_NODUP;
1316 struct string_list_item *item;
1317 struct ref *ref;
1318 struct tips sent_tips;
1319
1320 /*
1321 * Collect everything we know they would have at the end of
1322 * this push, and collect all tags they have.
1323 */
1324 memset(&sent_tips, 0, sizeof(sent_tips));
1325 for (ref = *dst; ref; ref = ref->next) {
1326 if (ref->peer_ref &&
f4e54d02 1327 !is_null_oid(&ref->peer_ref->new_oid))
fcd30b13 1328 add_to_tips(&sent_tips, &ref->peer_ref->new_oid);
c2aba155 1329 else
fcd30b13 1330 add_to_tips(&sent_tips, &ref->old_oid);
59556548 1331 if (starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1332 string_list_append(&dst_tag, ref->name);
1333 }
1334 clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK);
1335
3383e199 1336 string_list_sort(&dst_tag);
c2aba155
JH
1337
1338 /* Collect tags they do not have. */
1339 for (ref = src; ref; ref = ref->next) {
59556548 1340 if (!starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1341 continue; /* not a tag */
1342 if (string_list_has_string(&dst_tag, ref->name))
1343 continue; /* they already have it */
f4e54d02 1344 if (sha1_object_info(ref->new_oid.hash, NULL) != OBJ_TAG)
c2aba155
JH
1345 continue; /* be conservative */
1346 item = string_list_append(&src_tag, ref->name);
1347 item->util = ref;
1348 }
1349 string_list_clear(&dst_tag, 0);
1350
1351 /*
1352 * At this point, src_tag lists tags that are missing from
1353 * dst, and sent_tips lists the tips we are pushing or those
1354 * that we know they already have. An element in the src_tag
1355 * that is an ancestor of any of the sent_tips needs to be
1356 * sent to the other side.
1357 */
1358 if (sent_tips.nr) {
1359 for_each_string_list_item(item, &src_tag) {
1360 struct ref *ref = item->util;
1361 struct ref *dst_ref;
1362 struct commit *commit;
1363
f4e54d02 1364 if (is_null_oid(&ref->new_oid))
c2aba155 1365 continue;
f4e54d02 1366 commit = lookup_commit_reference_gently(ref->new_oid.hash, 1);
c2aba155
JH
1367 if (!commit)
1368 /* not pushing a commit, which is not an error */
1369 continue;
1370
1371 /*
1372 * Is this tag, which they do not have, reachable from
1373 * any of the commits we are sending?
1374 */
1375 if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
1376 continue;
1377
1378 /* Add it in */
1379 dst_ref = make_linked_ref(ref->name, dst_tail);
f4e54d02 1380 oidcpy(&dst_ref->new_oid, &ref->new_oid);
c2aba155
JH
1381 dst_ref->peer_ref = copy_ref(ref);
1382 }
1383 }
1384 string_list_clear(&src_tag, 0);
1385 free(sent_tips.tip);
1386}
1387
47a59185
JH
1388struct ref *find_ref_by_name(const struct ref *list, const char *name)
1389{
1390 for ( ; list; list = list->next)
1391 if (!strcmp(list->name, name))
1392 return (struct ref *)list;
1393 return NULL;
1394}
1395
f1bd15ab
BC
1396static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
1397{
1398 for ( ; ref; ref = ref->next)
1399 string_list_append_nodup(ref_index, ref->name)->util = ref;
1400
3383e199 1401 string_list_sort(ref_index);
f1bd15ab
BC
1402}
1403
ba928c13
JK
1404/*
1405 * Given only the set of local refs, sanity-check the set of push
1406 * refspecs. We can't catch all errors that match_push_refs would,
1407 * but we can catch some errors early before even talking to the
1408 * remote side.
1409 */
1410int check_push_refs(struct ref *src, int nr_refspec, const char **refspec_names)
1411{
1412 struct refspec *refspec = parse_push_refspec(nr_refspec, refspec_names);
1413 int ret = 0;
1414 int i;
1415
1416 for (i = 0; i < nr_refspec; i++) {
1417 struct refspec *rs = refspec + i;
1418
1419 if (rs->pattern || rs->matching)
1420 continue;
1421
1422 ret |= match_explicit_lhs(src, rs, NULL, NULL);
1423 }
1424
1425 free_refspec(nr_refspec, refspec);
1426 return ret;
1427}
1428
54a8ad92 1429/*
29753cdd
JH
1430 * Given the set of refs the local repository has, the set of refs the
1431 * remote repository has, and the refspec used for push, determine
1432 * what remote refs we will update and with what value by setting
1433 * peer_ref (which object is being pushed) and force (if the push is
1434 * forced) in elements of "dst". The function may add new elements to
1435 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
54a8ad92 1436 */
29753cdd
JH
1437int match_push_refs(struct ref *src, struct ref **dst,
1438 int nr_refspec, const char **refspec, int flags)
6b62816c 1439{
a83619d6 1440 struct refspec *rs;
28b9d6e5
AW
1441 int send_all = flags & MATCH_REFS_ALL;
1442 int send_mirror = flags & MATCH_REFS_MIRROR;
6ddba5e2 1443 int send_prune = flags & MATCH_REFS_PRUNE;
5f48cb95 1444 int errs;
2af202be 1445 static const char *default_refspec[] = { ":", NULL };
b1d8b1f3 1446 struct ref *ref, **dst_tail = tail_ref(dst);
f1bd15ab 1447 struct string_list dst_ref_index = STRING_LIST_INIT_NODUP;
6b62816c 1448
a83619d6
PB
1449 if (!nr_refspec) {
1450 nr_refspec = 1;
1451 refspec = default_refspec;
1452 }
1453 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
6d2bf96e 1454 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
6b62816c
DB
1455
1456 /* pick the remainder */
b1d8b1f3 1457 for (ref = src; ref; ref = ref->next) {
f1bd15ab 1458 struct string_list_item *dst_item;
6b62816c 1459 struct ref *dst_peer;
6e66bf3c
AR
1460 const struct refspec *pat = NULL;
1461 char *dst_name;
db70a04c 1462
6ddba5e2 1463 dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
db70a04c 1464 if (!dst_name)
a83619d6
PB
1465 continue;
1466
f1bd15ab
BC
1467 if (!dst_ref_index.nr)
1468 prepare_ref_index(&dst_ref_index, *dst);
1469
1470 dst_item = string_list_lookup(&dst_ref_index, dst_name);
1471 dst_peer = dst_item ? dst_item->util : NULL;
a83619d6
PB
1472 if (dst_peer) {
1473 if (dst_peer->peer_ref)
1474 /* We're already sending something to this ref. */
1475 goto free_name;
a83619d6
PB
1476 } else {
1477 if (pat->matching && !(send_all || send_mirror))
1478 /*
1479 * Remote doesn't have it, and we have no
1480 * explicit pattern, and we don't have
01689909 1481 * --all or --mirror.
a83619d6
PB
1482 */
1483 goto free_name;
28b9d6e5 1484
6b62816c 1485 /* Create a new one and link it */
6d2bf96e 1486 dst_peer = make_linked_ref(dst_name, &dst_tail);
f4e54d02 1487 oidcpy(&dst_peer->new_oid, &ref->new_oid);
f1bd15ab
BC
1488 string_list_insert(&dst_ref_index,
1489 dst_peer->name)->util = dst_peer;
6b62816c 1490 }
b1d8b1f3 1491 dst_peer->peer_ref = copy_ref(ref);
a83619d6 1492 dst_peer->force = pat->force;
6e66bf3c
AR
1493 free_name:
1494 free(dst_name);
6b62816c 1495 }
c2aba155 1496
f1bd15ab
BC
1497 string_list_clear(&dst_ref_index, 0);
1498
c2aba155
JH
1499 if (flags & MATCH_REFS_FOLLOW_TAGS)
1500 add_missing_tags(src, dst, &dst_tail);
1501
6ddba5e2 1502 if (send_prune) {
f1bd15ab 1503 struct string_list src_ref_index = STRING_LIST_INIT_NODUP;
6ddba5e2
FC
1504 /* check for missing refs on the remote */
1505 for (ref = *dst; ref; ref = ref->next) {
1506 char *src_name;
1507
1508 if (ref->peer_ref)
1509 /* We're already sending something to this ref. */
1510 continue;
1511
1512 src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
1513 if (src_name) {
f1bd15ab
BC
1514 if (!src_ref_index.nr)
1515 prepare_ref_index(&src_ref_index, src);
1516 if (!string_list_has_string(&src_ref_index,
1517 src_name))
6ddba5e2
FC
1518 ref->peer_ref = alloc_delete_ref();
1519 free(src_name);
1520 }
1521 }
f1bd15ab 1522 string_list_clear(&src_ref_index, 0);
6ddba5e2 1523 }
5f48cb95
JS
1524 if (errs)
1525 return -1;
6b62816c
DB
1526 return 0;
1527}
cf818348 1528
20e8b465 1529void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
631b5ef2 1530 int force_update)
20e8b465
TRC
1531{
1532 struct ref *ref;
1533
1534 for (ref = remote_refs; ref; ref = ref->next) {
8c5f6f71 1535 int force_ref_update = ref->force || force_update;
631b5ef2 1536 int reject_reason = 0;
8c5f6f71 1537
20e8b465 1538 if (ref->peer_ref)
f4e54d02 1539 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
20e8b465
TRC
1540 else if (!send_mirror)
1541 continue;
1542
f4e54d02 1543 ref->deletion = is_null_oid(&ref->new_oid);
20e8b465 1544 if (!ref->deletion &&
f4e54d02 1545 !oidcmp(&ref->old_oid, &ref->new_oid)) {
20e8b465
TRC
1546 ref->status = REF_STATUS_UPTODATE;
1547 continue;
1548 }
1549
a272b289 1550 /*
631b5ef2
JH
1551 * Bypass the usual "must fast-forward" check but
1552 * replace it with a weaker "the old value must be
1553 * this value we observed". If the remote ref has
1554 * moved and is now different from what we expect,
1555 * reject any push.
1556 *
1557 * It also is an error if the user told us to check
1558 * with the remote-tracking branch to find the value
1559 * to expect, but we did not have such a tracking
1560 * branch.
1561 */
1562 if (ref->expect_old_sha1) {
1563 if (ref->expect_old_no_trackback ||
f4e54d02 1564 oidcmp(&ref->old_oid, &ref->old_oid_expect))
631b5ef2
JH
1565 reject_reason = REF_STATUS_REJECT_STALE;
1566 }
1567
1568 /*
1569 * The usual "must fast-forward" rules.
1570 *
256b9d70
JH
1571 * Decide whether an individual refspec A:B can be
1572 * pushed. The push will succeed if any of the
1573 * following are true:
20e8b465 1574 *
a272b289 1575 * (1) the remote reference B does not exist
20e8b465 1576 *
a272b289
CR
1577 * (2) the remote reference B is being removed (i.e.,
1578 * pushing :B where no source is specified)
20e8b465 1579 *
256b9d70
JH
1580 * (3) the destination is not under refs/tags/, and
1581 * if the old and new value is a commit, the new
1582 * is a descendant of the old.
20e8b465 1583 *
a272b289
CR
1584 * (4) it is forced using the +A:B notation, or by
1585 * passing the --force argument
20e8b465
TRC
1586 */
1587
f4e54d02 1588 else if (!ref->deletion && !is_null_oid(&ref->old_oid)) {
59556548 1589 if (starts_with(ref->name, "refs/tags/"))
631b5ef2 1590 reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
f4e54d02 1591 else if (!has_object_file(&ref->old_oid))
631b5ef2 1592 reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
f4e54d02 1593 else if (!lookup_commit_reference_gently(ref->old_oid.hash, 1) ||
1594 !lookup_commit_reference_gently(ref->new_oid.hash, 1))
631b5ef2 1595 reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
6f3d57b6 1596 else if (!ref_newer(&ref->new_oid, &ref->old_oid))
631b5ef2 1597 reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
20e8b465 1598 }
631b5ef2
JH
1599
1600 /*
1601 * "--force" will defeat any rejection implemented
1602 * by the rules above.
1603 */
1604 if (!force_ref_update)
1605 ref->status = reject_reason;
1606 else if (reject_reason)
1607 ref->forced_update = 1;
20e8b465
TRC
1608 }
1609}
1610
05e73682
JH
1611static void set_merge(struct branch *ret)
1612{
9e3751d4 1613 struct remote *remote;
05e73682 1614 char *ref;
fcd30b13 1615 struct object_id oid;
05e73682
JH
1616 int i;
1617
ee2499fe
JK
1618 if (!ret)
1619 return; /* no branch */
1620 if (ret->merge)
1621 return; /* already run */
1622 if (!ret->remote_name || !ret->merge_nr) {
1623 /*
1624 * no merge config; let's make sure we don't confuse callers
1625 * with a non-zero merge_nr but a NULL merge
1626 */
1627 ret->merge_nr = 0;
1628 return;
1629 }
1630
9e3751d4
JK
1631 remote = remote_get(ret->remote_name);
1632
05e73682
JH
1633 ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
1634 for (i = 0; i < ret->merge_nr; i++) {
1635 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1636 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
9e3751d4 1637 if (!remote_find_tracking(remote, ret->merge[i]) ||
05e73682
JH
1638 strcmp(ret->remote_name, "."))
1639 continue;
1640 if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
fcd30b13 1641 oid.hash, &ref) == 1)
05e73682
JH
1642 ret->merge[i]->dst = ref;
1643 else
1644 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1645 }
1646}
1647
cf818348
DB
1648struct branch *branch_get(const char *name)
1649{
1650 struct branch *ret;
1651
1652 read_config();
1653 if (!name || !*name || !strcmp(name, "HEAD"))
1654 ret = current_branch;
1655 else
1656 ret = make_branch(name, 0);
ee2499fe 1657 set_merge(ret);
cf818348
DB
1658 return ret;
1659}
1660
1661int branch_has_merge_config(struct branch *branch)
1662{
1663 return branch && !!branch->merge;
1664}
1665
85682c19
SP
1666int branch_merge_matches(struct branch *branch,
1667 int i,
1668 const char *refname)
cf818348 1669{
85682c19 1670 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 1671 return 0;
54457fe5 1672 return refname_match(branch->merge[i]->src, refname);
cf818348 1673}
d71ab174 1674
3a429d0a
JK
1675__attribute((format (printf,2,3)))
1676static const char *error_buf(struct strbuf *err, const char *fmt, ...)
1677{
1678 if (err) {
1679 va_list ap;
1680 va_start(ap, fmt);
1681 strbuf_vaddf(err, fmt, ap);
1682 va_end(ap);
1683 }
1684 return NULL;
1685}
1686
1687const char *branch_get_upstream(struct branch *branch, struct strbuf *err)
1688{
1689 if (!branch)
1690 return error_buf(err, _("HEAD does not point to a branch"));
1ca41a19
JK
1691
1692 if (!branch->merge || !branch->merge[0]) {
1693 /*
1694 * no merge config; is it because the user didn't define any,
1695 * or because it is not a real branch, and get_branch
1696 * auto-vivified it?
1697 */
3a429d0a
JK
1698 if (!ref_exists(branch->refname))
1699 return error_buf(err, _("no such branch: '%s'"),
1700 branch->name);
1ca41a19
JK
1701 return error_buf(err,
1702 _("no upstream configured for branch '%s'"),
1703 branch->name);
1704 }
1705
1706 if (!branch->merge[0]->dst)
3a429d0a
JK
1707 return error_buf(err,
1708 _("upstream branch '%s' not stored as a remote-tracking branch"),
1709 branch->merge[0]->src);
3a429d0a 1710
a9f9f8cc
JK
1711 return branch->merge[0]->dst;
1712}
1713
e291c75a
JK
1714static const char *tracking_for_push_dest(struct remote *remote,
1715 const char *refname,
1716 struct strbuf *err)
1717{
1718 char *ret;
1719
1720 ret = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
1721 if (!ret)
1722 return error_buf(err,
1723 _("push destination '%s' on remote '%s' has no local tracking branch"),
1724 refname, remote->name);
1725 return ret;
1726}
1727
1728static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
1729{
1730 struct remote *remote;
1731
1732 if (!branch)
1733 return error_buf(err, _("HEAD does not point to a branch"));
1734
1735 remote = remote_get(pushremote_for_branch(branch, NULL));
1736 if (!remote)
1737 return error_buf(err,
1738 _("branch '%s' has no remote for pushing"),
1739 branch->name);
1740
1741 if (remote->push_refspec_nr) {
1742 char *dst;
1743 const char *ret;
1744
1745 dst = apply_refspecs(remote->push, remote->push_refspec_nr,
1746 branch->refname);
1747 if (!dst)
1748 return error_buf(err,
1749 _("push refspecs for '%s' do not include '%s'"),
1750 remote->name, branch->name);
1751
1752 ret = tracking_for_push_dest(remote, dst, err);
1753 free(dst);
1754 return ret;
1755 }
1756
1757 if (remote->mirror)
1758 return tracking_for_push_dest(remote, branch->refname, err);
1759
1760 switch (push_default) {
1761 case PUSH_DEFAULT_NOTHING:
1762 return error_buf(err, _("push has no destination (push.default is 'nothing')"));
1763
1764 case PUSH_DEFAULT_MATCHING:
1765 case PUSH_DEFAULT_CURRENT:
1766 return tracking_for_push_dest(remote, branch->refname, err);
1767
1768 case PUSH_DEFAULT_UPSTREAM:
1769 return branch_get_upstream(branch, err);
1770
1771 case PUSH_DEFAULT_UNSPECIFIED:
1772 case PUSH_DEFAULT_SIMPLE:
1773 {
1774 const char *up, *cur;
1775
1776 up = branch_get_upstream(branch, err);
1777 if (!up)
1778 return NULL;
1779 cur = tracking_for_push_dest(remote, branch->refname, err);
1780 if (!cur)
1781 return NULL;
1782 if (strcmp(cur, up))
1783 return error_buf(err,
1784 _("cannot resolve 'simple' push to a single destination"));
1785 return cur;
1786 }
1787 }
1788
1789 die("BUG: unhandled push situation");
1790}
1791
1792const char *branch_get_push(struct branch *branch, struct strbuf *err)
1793{
1794 if (!branch->push_tracking_ref)
1795 branch->push_tracking_ref = branch_get_push_1(branch, err);
1796 return branch->push_tracking_ref;
1797}
1798
f8fb971e
JH
1799static int ignore_symref_update(const char *refname)
1800{
fcd30b13 1801 struct object_id oid;
f8fb971e
JH
1802 int flag;
1803
fcd30b13 1804 if (!resolve_ref_unsafe(refname, 0, oid.hash, &flag))
f8fb971e
JH
1805 return 0; /* non-existing refs are OK */
1806 return (flag & REF_ISSYMREF);
1807}
1808
f166db26
MH
1809/*
1810 * Create and return a list of (struct ref) consisting of copies of
1811 * each remote_ref that matches refspec. refspec must be a pattern.
1812 * Fill in the copies' peer_ref to describe the local tracking refs to
1813 * which they map. Omit any references that would map to an existing
1814 * local symbolic ref.
1815 */
4577370e 1816static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
1817 const struct refspec *refspec)
1818{
4577370e 1819 const struct ref *ref;
d71ab174
DB
1820 struct ref *ret = NULL;
1821 struct ref **tail = &ret;
1822
d71ab174 1823 for (ref = remote_refs; ref; ref = ref->next) {
e31a17f7
MH
1824 char *expn_name = NULL;
1825
d71ab174
DB
1826 if (strchr(ref->name, '^'))
1827 continue; /* a dereference item */
e928213f 1828 if (match_name_with_pattern(refspec->src, ref->name,
f8fb971e
JH
1829 refspec->dst, &expn_name) &&
1830 !ignore_symref_update(expn_name)) {
d71ab174 1831 struct ref *cpy = copy_ref(ref);
d71ab174 1832
e928213f 1833 cpy->peer_ref = alloc_ref(expn_name);
d71ab174
DB
1834 if (refspec->force)
1835 cpy->peer_ref->force = 1;
1836 *tail = cpy;
1837 tail = &cpy->next;
1838 }
e31a17f7 1839 free(expn_name);
d71ab174
DB
1840 }
1841
1842 return ret;
1843}
1844
4577370e 1845static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 1846{
4577370e 1847 const struct ref *ref;
d71ab174 1848 for (ref = refs; ref; ref = ref->next) {
54457fe5 1849 if (refname_match(name, ref->name))
d71ab174
DB
1850 return ref;
1851 }
1852 return NULL;
1853}
1854
4577370e 1855struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 1856{
4577370e 1857 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
1858
1859 if (!ref)
9ad7c5ae 1860 return NULL;
d71ab174
DB
1861
1862 return copy_ref(ref);
1863}
1864
1865static struct ref *get_local_ref(const char *name)
1866{
3eb96997 1867 if (!name || name[0] == '\0')
d71ab174
DB
1868 return NULL;
1869
59556548 1870 if (starts_with(name, "refs/"))
59c69c0c 1871 return alloc_ref(name);
d71ab174 1872
59556548
CC
1873 if (starts_with(name, "heads/") ||
1874 starts_with(name, "tags/") ||
1875 starts_with(name, "remotes/"))
8009768e 1876 return alloc_ref_with_prefix("refs/", 5, name);
d71ab174 1877
8009768e 1878 return alloc_ref_with_prefix("refs/heads/", 11, name);
d71ab174
DB
1879}
1880
4577370e 1881int get_fetch_map(const struct ref *remote_refs,
d71ab174 1882 const struct refspec *refspec,
9ad7c5ae
JH
1883 struct ref ***tail,
1884 int missing_ok)
d71ab174 1885{
ef00d150 1886 struct ref *ref_map, **rmp;
d71ab174
DB
1887
1888 if (refspec->pattern) {
1889 ref_map = get_expanded_map(remote_refs, refspec);
1890 } else {
9ad7c5ae
JH
1891 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1892
6e7b66ee
JH
1893 if (refspec->exact_sha1) {
1894 ref_map = alloc_ref(name);
f4e54d02 1895 get_oid_hex(name, &ref_map->old_oid);
6e7b66ee
JH
1896 } else {
1897 ref_map = get_remote_ref(remote_refs, name);
1898 }
9ad7c5ae
JH
1899 if (!missing_ok && !ref_map)
1900 die("Couldn't find remote ref %s", name);
1901 if (ref_map) {
1902 ref_map->peer_ref = get_local_ref(refspec->dst);
1903 if (ref_map->peer_ref && refspec->force)
1904 ref_map->peer_ref->force = 1;
1905 }
d71ab174
DB
1906 }
1907
ef00d150
DB
1908 for (rmp = &ref_map; *rmp; ) {
1909 if ((*rmp)->peer_ref) {
59556548 1910 if (!starts_with((*rmp)->peer_ref->name, "refs/") ||
5c08c1f2 1911 check_refname_format((*rmp)->peer_ref->name, 0)) {
ef00d150
DB
1912 struct ref *ignore = *rmp;
1913 error("* Ignoring funny ref '%s' locally",
1914 (*rmp)->peer_ref->name);
1915 *rmp = (*rmp)->next;
1916 free(ignore->peer_ref);
1917 free(ignore);
1918 continue;
1919 }
1920 }
1921 rmp = &((*rmp)->next);
d71ab174
DB
1922 }
1923
8f70a765
AR
1924 if (ref_map)
1925 tail_link_ref(ref_map, tail);
d71ab174
DB
1926
1927 return 0;
1928}
be885d96
DB
1929
1930int resolve_remote_symref(struct ref *ref, struct ref *list)
1931{
1932 if (!ref->symref)
1933 return 0;
1934 for (; list; list = list->next)
1935 if (!strcmp(ref->symref, list->name)) {
f4e54d02 1936 oidcpy(&ref->old_oid, &list->old_oid);
be885d96
DB
1937 return 0;
1938 }
1939 return 1;
1940}
6d21bf96 1941
ec8452d5
JS
1942static void unmark_and_free(struct commit_list *list, unsigned int mark)
1943{
1944 while (list) {
e510ab89
RS
1945 struct commit *commit = pop_commit(&list);
1946 commit->object.flags &= ~mark;
ec8452d5
JS
1947 }
1948}
1949
6f3d57b6 1950int ref_newer(const struct object_id *new_oid, const struct object_id *old_oid)
ec8452d5
JS
1951{
1952 struct object *o;
1953 struct commit *old, *new;
1954 struct commit_list *list, *used;
1955 int found = 0;
1956
75e5c0dc
JH
1957 /*
1958 * Both new and old must be commit-ish and new is descendant of
ec8452d5
JS
1959 * old. Otherwise we require --force.
1960 */
6f3d57b6 1961 o = deref_tag(parse_object(old_oid->hash), NULL, 0);
ec8452d5
JS
1962 if (!o || o->type != OBJ_COMMIT)
1963 return 0;
1964 old = (struct commit *) o;
1965
6f3d57b6 1966 o = deref_tag(parse_object(new_oid->hash), NULL, 0);
ec8452d5
JS
1967 if (!o || o->type != OBJ_COMMIT)
1968 return 0;
1969 new = (struct commit *) o;
1970
1971 if (parse_commit(new) < 0)
1972 return 0;
1973
1974 used = list = NULL;
1975 commit_list_insert(new, &list);
1976 while (list) {
1977 new = pop_most_recent_commit(&list, TMP_MARK);
1978 commit_list_insert(new, &used);
1979 if (new == old) {
1980 found = 1;
1981 break;
1982 }
1983 }
1984 unmark_and_free(list, TMP_MARK);
1985 unmark_and_free(used, TMP_MARK);
1986 return found;
1987}
1988
6d21bf96 1989/*
f2e08739 1990 * Compare a branch with its upstream, and save their differences (number
979cb245
JK
1991 * of commits) in *num_ours and *num_theirs. The name of the upstream branch
1992 * (or NULL if no upstream is defined) is returned via *upstream_name, if it
1993 * is not itself NULL.
f2e08739 1994 *
979cb245
JK
1995 * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
1996 * upstream defined, or ref does not exist), 0 otherwise.
6d21bf96 1997 */
979cb245
JK
1998int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
1999 const char **upstream_name)
6d21bf96 2000{
fcd30b13 2001 struct object_id oid;
6d21bf96 2002 struct commit *ours, *theirs;
6d21bf96 2003 struct rev_info revs;
0b282cc4
JK
2004 const char *base;
2005 struct argv_array argv = ARGV_ARRAY_INIT;
6d21bf96 2006
f2e08739 2007 /* Cannot stat unless we are marked to build on top of somebody else. */
3a429d0a 2008 base = branch_get_upstream(branch, NULL);
979cb245
JK
2009 if (upstream_name)
2010 *upstream_name = base;
a9f9f8cc 2011 if (!base)
979cb245 2012 return -1;
6d21bf96 2013
f2e08739 2014 /* Cannot stat if what we used to build on no longer exists */
fcd30b13 2015 if (read_ref(base, oid.hash))
f2e08739 2016 return -1;
fcd30b13 2017 theirs = lookup_commit_reference(oid.hash);
6d21bf96 2018 if (!theirs)
f2e08739 2019 return -1;
6d21bf96 2020
fcd30b13 2021 if (read_ref(branch->refname, oid.hash))
f2e08739 2022 return -1;
fcd30b13 2023 ours = lookup_commit_reference(oid.hash);
6d21bf96 2024 if (!ours)
f2e08739 2025 return -1;
6d21bf96
JH
2026
2027 /* are we the same? */
f2e08739
JX
2028 if (theirs == ours) {
2029 *num_theirs = *num_ours = 0;
979cb245 2030 return 0;
f2e08739 2031 }
6d21bf96 2032
8fbf879e 2033 /* Run "rev-list --left-right ours...theirs" internally... */
0b282cc4
JK
2034 argv_array_push(&argv, ""); /* ignored */
2035 argv_array_push(&argv, "--left-right");
2036 argv_array_pushf(&argv, "%s...%s",
f2fd0760 2037 oid_to_hex(&ours->object.oid),
2038 oid_to_hex(&theirs->object.oid));
0b282cc4 2039 argv_array_push(&argv, "--");
6d21bf96
JH
2040
2041 init_revisions(&revs, NULL);
0b282cc4 2042 setup_revisions(argv.argc, argv.argv, &revs, NULL);
81c3ce3c
SB
2043 if (prepare_revision_walk(&revs))
2044 die("revision walk setup failed");
6d21bf96
JH
2045
2046 /* ... and count the commits on each side. */
2047 *num_ours = 0;
2048 *num_theirs = 0;
2049 while (1) {
2050 struct commit *c = get_revision(&revs);
2051 if (!c)
2052 break;
2053 if (c->object.flags & SYMMETRIC_LEFT)
2054 (*num_ours)++;
2055 else
2056 (*num_theirs)++;
2057 }
c0234b2e
JH
2058
2059 /* clear object flags smudged by the above traversal */
2060 clear_commit_marks(ours, ALL_REV_FLAGS);
2061 clear_commit_marks(theirs, ALL_REV_FLAGS);
0b282cc4
JK
2062
2063 argv_array_clear(&argv);
979cb245 2064 return 0;
6d21bf96
JH
2065}
2066
2067/*
2068 * Return true when there is anything to report, otherwise false.
2069 */
2070int format_tracking_info(struct branch *branch, struct strbuf *sb)
2071{
f2e08739 2072 int ours, theirs;
979cb245 2073 const char *full_base;
2f50babe 2074 char *base;
f2e08739 2075 int upstream_is_gone = 0;
6d21bf96 2076
979cb245
JK
2077 if (stat_tracking_info(branch, &ours, &theirs, &full_base) < 0) {
2078 if (!full_base)
2079 return 0;
f2e08739 2080 upstream_is_gone = 1;
f2e08739 2081 }
6d21bf96 2082
979cb245 2083 base = shorten_unambiguous_ref(full_base, 0);
f2e08739
JX
2084 if (upstream_is_gone) {
2085 strbuf_addf(sb,
2086 _("Your branch is based on '%s', but the upstream is gone.\n"),
2087 base);
2088 if (advice_status_hints)
2089 strbuf_addf(sb,
2090 _(" (use \"git branch --unset-upstream\" to fixup)\n"));
f223459b
JX
2091 } else if (!ours && !theirs) {
2092 strbuf_addf(sb,
2093 _("Your branch is up-to-date with '%s'.\n"),
2094 base);
f2e08739 2095 } else if (!theirs) {
8a5b7494
JX
2096 strbuf_addf(sb,
2097 Q_("Your branch is ahead of '%s' by %d commit.\n",
2098 "Your branch is ahead of '%s' by %d commits.\n",
f2e08739
JX
2099 ours),
2100 base, ours);
491e3075
JK
2101 if (advice_status_hints)
2102 strbuf_addf(sb,
2103 _(" (use \"git push\" to publish your local commits)\n"));
f2e08739 2104 } else if (!ours) {
8a5b7494
JX
2105 strbuf_addf(sb,
2106 Q_("Your branch is behind '%s' by %d commit, "
2107 "and can be fast-forwarded.\n",
2108 "Your branch is behind '%s' by %d commits, "
2109 "and can be fast-forwarded.\n",
f2e08739
JX
2110 theirs),
2111 base, theirs);
491e3075
JK
2112 if (advice_status_hints)
2113 strbuf_addf(sb,
2114 _(" (use \"git pull\" to update your local branch)\n"));
c190ced6 2115 } else {
8a5b7494
JX
2116 strbuf_addf(sb,
2117 Q_("Your branch and '%s' have diverged,\n"
2118 "and have %d and %d different commit each, "
2119 "respectively.\n",
2120 "Your branch and '%s' have diverged,\n"
2121 "and have %d and %d different commits each, "
2122 "respectively.\n",
f2e08739
JX
2123 theirs),
2124 base, ours, theirs);
491e3075
JK
2125 if (advice_status_hints)
2126 strbuf_addf(sb,
2127 _(" (use \"git pull\" to merge the remote branch into yours)\n"));
c190ced6 2128 }
2f50babe 2129 free(base);
6d21bf96
JH
2130 return 1;
2131}
454e2025 2132
455ade65
MH
2133static int one_local_ref(const char *refname, const struct object_id *oid,
2134 int flag, void *cb_data)
454e2025
JS
2135{
2136 struct ref ***local_tail = cb_data;
2137 struct ref *ref;
2138 int len;
2139
2140 /* we already know it starts with refs/ to get here */
8d9c5010 2141 if (check_refname_format(refname + 5, 0))
454e2025
JS
2142 return 0;
2143
2144 len = strlen(refname) + 1;
2145 ref = xcalloc(1, sizeof(*ref) + len);
f4e54d02 2146 oidcpy(&ref->new_oid, oid);
454e2025
JS
2147 memcpy(ref->name, refname, len);
2148 **local_tail = ref;
2149 *local_tail = &ref->next;
2150 return 0;
2151}
2152
2153struct ref *get_local_heads(void)
2154{
55f0566f 2155 struct ref *local_refs = NULL, **local_tail = &local_refs;
2b2a5be3 2156
454e2025
JS
2157 for_each_ref(one_local_ref, &local_tail);
2158 return local_refs;
2159}
8ef51733 2160
4229f1fa
JS
2161struct ref *guess_remote_head(const struct ref *head,
2162 const struct ref *refs,
2163 int all)
8ef51733 2164{
8ef51733 2165 const struct ref *r;
4229f1fa
JS
2166 struct ref *list = NULL;
2167 struct ref **tail = &list;
8ef51733 2168
6cb4e6cc 2169 if (!head)
8ef51733
JS
2170 return NULL;
2171
fbb074c2
JK
2172 /*
2173 * Some transports support directly peeking at
2174 * where HEAD points; if that is the case, then
2175 * we don't have to guess.
2176 */
2177 if (head->symref)
2178 return copy_ref(find_ref_by_name(refs, head->symref));
2179
8ef51733 2180 /* If refs/heads/master could be right, it is. */
4229f1fa
JS
2181 if (!all) {
2182 r = find_ref_by_name(refs, "refs/heads/master");
f4e54d02 2183 if (r && !oidcmp(&r->old_oid, &head->old_oid))
4229f1fa
JS
2184 return copy_ref(r);
2185 }
8ef51733
JS
2186
2187 /* Look for another ref that points there */
4229f1fa 2188 for (r = refs; r; r = r->next) {
61adfd30 2189 if (r != head &&
59556548 2190 starts_with(r->name, "refs/heads/") &&
f4e54d02 2191 !oidcmp(&r->old_oid, &head->old_oid)) {
4229f1fa
JS
2192 *tail = copy_ref(r);
2193 tail = &((*tail)->next);
2194 if (!all)
2195 break;
2196 }
2197 }
8ef51733 2198
4229f1fa 2199 return list;
8ef51733 2200}
f2ef6075
JS
2201
2202struct stale_heads_info {
f2ef6075
JS
2203 struct string_list *ref_names;
2204 struct ref **stale_refs_tail;
ed43de6e
CMN
2205 struct refspec *refs;
2206 int ref_count;
f2ef6075
JS
2207};
2208
455ade65
MH
2209static int get_stale_heads_cb(const char *refname, const struct object_id *oid,
2210 int flags, void *cb_data)
f2ef6075
JS
2211{
2212 struct stale_heads_info *info = cb_data;
e6f63712 2213 struct string_list matches = STRING_LIST_INIT_DUP;
ed43de6e 2214 struct refspec query;
e6f63712 2215 int i, stale = 1;
ed43de6e
CMN
2216 memset(&query, 0, sizeof(struct refspec));
2217 query.dst = (char *)refname;
2218
e6f63712
CMN
2219 query_refspecs_multiple(info->refs, info->ref_count, &query, &matches);
2220 if (matches.nr == 0)
2221 goto clean_exit; /* No matches */
ed43de6e
CMN
2222
2223 /*
2224 * If we did find a suitable refspec and it's not a symref and
2225 * it's not in the list of refs that currently exist in that
e6f63712
CMN
2226 * remote, we consider it to be stale. In order to deal with
2227 * overlapping refspecs, we need to go over all of the
2228 * matching refs.
ed43de6e 2229 */
e6f63712
CMN
2230 if (flags & REF_ISSYMREF)
2231 goto clean_exit;
2232
2233 for (i = 0; stale && i < matches.nr; i++)
2234 if (string_list_has_string(info->ref_names, matches.items[i].string))
2235 stale = 0;
2236
2237 if (stale) {
ed43de6e 2238 struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail);
f4e54d02 2239 oidcpy(&ref->new_oid, oid);
f2ef6075 2240 }
ed43de6e 2241
e6f63712
CMN
2242clean_exit:
2243 string_list_clear(&matches, 0);
f2ef6075
JS
2244 return 0;
2245}
2246
ed43de6e 2247struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map)
f2ef6075
JS
2248{
2249 struct ref *ref, *stale_refs = NULL;
183113a5 2250 struct string_list ref_names = STRING_LIST_INIT_NODUP;
f2ef6075 2251 struct stale_heads_info info;
2b2a5be3 2252
f2ef6075
JS
2253 info.ref_names = &ref_names;
2254 info.stale_refs_tail = &stale_refs;
ed43de6e
CMN
2255 info.refs = refs;
2256 info.ref_count = ref_count;
f2ef6075 2257 for (ref = fetch_map; ref; ref = ref->next)
1d2f80fa 2258 string_list_append(&ref_names, ref->name);
3383e199 2259 string_list_sort(&ref_names);
f2ef6075
JS
2260 for_each_ref(get_stale_heads_cb, &info);
2261 string_list_clear(&ref_names, 0);
2262 return stale_refs;
2263}
28f5d176
JH
2264
2265/*
2266 * Compare-and-swap
2267 */
a355b11d 2268static void clear_cas_option(struct push_cas_option *cas)
28f5d176
JH
2269{
2270 int i;
2271
2272 for (i = 0; i < cas->nr; i++)
2273 free(cas->entry[i].refname);
2274 free(cas->entry);
2275 memset(cas, 0, sizeof(*cas));
2276}
2277
2278static struct push_cas *add_cas_entry(struct push_cas_option *cas,
2279 const char *refname,
2280 size_t refnamelen)
2281{
2282 struct push_cas *entry;
2283 ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc);
2284 entry = &cas->entry[cas->nr++];
2285 memset(entry, 0, sizeof(*entry));
2286 entry->refname = xmemdupz(refname, refnamelen);
2287 return entry;
2288}
2289
2290int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset)
2291{
2292 const char *colon;
2293 struct push_cas *entry;
2294
2295 if (unset) {
2296 /* "--no-<option>" */
2297 clear_cas_option(cas);
2298 return 0;
2299 }
2300
2301 if (!arg) {
2302 /* just "--<option>" */
2303 cas->use_tracking_for_rest = 1;
2304 return 0;
2305 }
2306
2307 /* "--<option>=refname" or "--<option>=refname:value" */
2308 colon = strchrnul(arg, ':');
2309 entry = add_cas_entry(cas, arg, colon - arg);
2310 if (!*colon)
2311 entry->use_tracking = 1;
2312 else if (get_sha1(colon + 1, entry->expect))
2313 return error("cannot parse expected object name '%s'", colon + 1);
2314 return 0;
2315}
2316
2317int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset)
2318{
2319 return parse_push_cas_option(opt->value, arg, unset);
2320}
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2321
2322int is_empty_cas(const struct push_cas_option *cas)
2323{
2324 return !cas->use_tracking_for_rest && !cas->nr;
2325}
2326
2327/*
2328 * Look at remote.fetch refspec and see if we have a remote
2329 * tracking branch for the refname there. Fill its current
2330 * value in sha1[].
2331 * If we cannot do so, return negative to signal an error.
2332 */
2333static int remote_tracking(struct remote *remote, const char *refname,
fcd30b13 2334 struct object_id *oid)
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2335{
2336 char *dst;
2337
2338 dst = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
2339 if (!dst)
2340 return -1; /* no tracking ref for refname at remote */
fcd30b13 2341 if (read_ref(dst, oid->hash))
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2342 return -1; /* we know what the tracking ref is but we cannot read it */
2343 return 0;
2344}
2345
2346static void apply_cas(struct push_cas_option *cas,
2347 struct remote *remote,
2348 struct ref *ref)
2349{
2350 int i;
2351
2352 /* Find an explicit --<option>=<name>[:<value>] entry */
2353 for (i = 0; i < cas->nr; i++) {
2354 struct push_cas *entry = &cas->entry[i];
54457fe5 2355 if (!refname_match(entry->refname, ref->name))
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2356 continue;
2357 ref->expect_old_sha1 = 1;
2358 if (!entry->use_tracking)
f4e54d02 2359 hashcpy(ref->old_oid_expect.hash, cas->entry[i].expect);
fcd30b13 2360 else if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
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2361 ref->expect_old_no_trackback = 1;
2362 return;
2363 }
2364
2365 /* Are we using "--<option>" to cover all? */
2366 if (!cas->use_tracking_for_rest)
2367 return;
2368
2369 ref->expect_old_sha1 = 1;
fcd30b13 2370 if (remote_tracking(remote, ref->name, &ref->old_oid_expect))
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2371 ref->expect_old_no_trackback = 1;
2372}
2373
2374void apply_push_cas(struct push_cas_option *cas,
2375 struct remote *remote,
2376 struct ref *remote_refs)
2377{
2378 struct ref *ref;
2379 for (ref = remote_refs; ref; ref = ref->next)
2380 apply_cas(cas, remote, ref);
2381}