http-push: use an argv_array for setup_revisions
[git/git.git] / remote.c
CommitLineData
5751f490
DB
1#include "cache.h"
2#include "remote.h"
3#include "refs.h"
6d21bf96
JH
4#include "commit.h"
5#include "diff.h"
6#include "revision.h"
8ca12c0d 7#include "dir.h"
ec8452d5 8#include "tag.h"
73cf0822 9#include "string-list.h"
ed81c76b 10#include "mergesort.h"
5751f490 11
6ddba5e2
FC
12enum map_direction { FROM_SRC, FROM_DST };
13
e0aaa29f
DB
14static struct refspec s_tag_refspec = {
15 0,
16 1,
b84c343c 17 0,
6e7b66ee 18 0,
08fbdb30
DB
19 "refs/tags/*",
20 "refs/tags/*"
e0aaa29f
DB
21};
22
23const struct refspec *tag_refspec = &s_tag_refspec;
24
844112ca
JH
25struct counted_string {
26 size_t len;
27 const char *s;
28};
55029ae4
DB
29struct rewrite {
30 const char *base;
844112ca
JH
31 size_t baselen;
32 struct counted_string *instead_of;
55029ae4
DB
33 int instead_of_nr;
34 int instead_of_alloc;
35};
d071d942
JT
36struct rewrites {
37 struct rewrite **rewrite;
38 int rewrite_alloc;
39 int rewrite_nr;
40};
55029ae4 41
5751f490 42static struct remote **remotes;
2d31347b
DB
43static int remotes_alloc;
44static int remotes_nr;
d0da003d 45static struct hashmap remotes_hash;
5751f490 46
cf818348 47static struct branch **branches;
2d31347b
DB
48static int branches_alloc;
49static int branches_nr;
cf818348
DB
50
51static struct branch *current_branch;
f24f715e 52static const char *pushremote_name;
cf818348 53
d071d942 54static struct rewrites rewrites;
1c2eafb8 55static struct rewrites rewrites_push;
55029ae4 56
0a4da29d
DB
57static int valid_remote(const struct remote *remote)
58{
c578f51d 59 return (!!remote->url) || (!!remote->foreign_vcs);
0a4da29d
DB
60}
61
d071d942 62static const char *alias_url(const char *url, struct rewrites *r)
55029ae4
DB
63{
64 int i, j;
844112ca
JH
65 struct counted_string *longest;
66 int longest_i;
67
68 longest = NULL;
69 longest_i = -1;
d071d942
JT
70 for (i = 0; i < r->rewrite_nr; i++) {
71 if (!r->rewrite[i])
55029ae4 72 continue;
d071d942 73 for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) {
59556548 74 if (starts_with(url, r->rewrite[i]->instead_of[j].s) &&
844112ca 75 (!longest ||
d071d942
JT
76 longest->len < r->rewrite[i]->instead_of[j].len)) {
77 longest = &(r->rewrite[i]->instead_of[j]);
844112ca 78 longest_i = i;
55029ae4
DB
79 }
80 }
81 }
844112ca
JH
82 if (!longest)
83 return url;
84
75faa45a 85 return xstrfmt("%s%s", r->rewrite[longest_i]->base, url + longest->len);
55029ae4
DB
86}
87
5751f490
DB
88static void add_push_refspec(struct remote *remote, const char *ref)
89{
2d31347b
DB
90 ALLOC_GROW(remote->push_refspec,
91 remote->push_refspec_nr + 1,
92 remote->push_refspec_alloc);
93 remote->push_refspec[remote->push_refspec_nr++] = ref;
5751f490
DB
94}
95
5d46c9d4
DB
96static void add_fetch_refspec(struct remote *remote, const char *ref)
97{
2d31347b
DB
98 ALLOC_GROW(remote->fetch_refspec,
99 remote->fetch_refspec_nr + 1,
100 remote->fetch_refspec_alloc);
101 remote->fetch_refspec[remote->fetch_refspec_nr++] = ref;
5d46c9d4
DB
102}
103
28b91f8a 104static void add_url(struct remote *remote, const char *url)
5751f490 105{
2d31347b
DB
106 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
107 remote->url[remote->url_nr++] = url;
5751f490
DB
108}
109
20346234
MG
110static void add_pushurl(struct remote *remote, const char *pushurl)
111{
112 ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc);
113 remote->pushurl[remote->pushurl_nr++] = pushurl;
114}
115
1c2eafb8
JT
116static void add_pushurl_alias(struct remote *remote, const char *url)
117{
118 const char *pushurl = alias_url(url, &rewrites_push);
119 if (pushurl != url)
120 add_pushurl(remote, pushurl);
121}
122
123static void add_url_alias(struct remote *remote, const char *url)
124{
125 add_url(remote, alias_url(url, &rewrites));
126 add_pushurl_alias(remote, url);
127}
128
d0da003d
PR
129struct remotes_hash_key {
130 const char *str;
131 int len;
132};
133
134static int remotes_hash_cmp(const struct remote *a, const struct remote *b, const struct remotes_hash_key *key)
135{
136 if (key)
137 return strncmp(a->name, key->str, key->len) || a->name[key->len];
138 else
139 return strcmp(a->name, b->name);
140}
141
142static inline void init_remotes_hash(void)
143{
144 if (!remotes_hash.cmpfn)
145 hashmap_init(&remotes_hash, (hashmap_cmp_fn)remotes_hash_cmp, 0);
146}
147
5751f490
DB
148static struct remote *make_remote(const char *name, int len)
149{
d0da003d
PR
150 struct remote *ret, *replaced;
151 struct remotes_hash_key lookup;
152 struct hashmap_entry lookup_entry;
5751f490 153
d0da003d
PR
154 if (!len)
155 len = strlen(name);
156
157 init_remotes_hash();
158 lookup.str = name;
159 lookup.len = len;
160 hashmap_entry_init(&lookup_entry, memhash(name, len));
161
162 if ((ret = hashmap_get(&remotes_hash, &lookup_entry, &lookup)) != NULL)
163 return ret;
5751f490 164
2d31347b 165 ret = xcalloc(1, sizeof(struct remote));
737c5a9c 166 ret->prune = -1; /* unspecified */
2d31347b
DB
167 ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
168 remotes[remotes_nr++] = ret;
d0da003d
PR
169 ret->name = xstrndup(name, len);
170
171 hashmap_entry_init(ret, lookup_entry.hash);
172 replaced = hashmap_put(&remotes_hash, ret);
173 assert(replaced == NULL); /* no previous entry overwritten */
2d31347b 174 return ret;
5751f490
DB
175}
176
cf818348
DB
177static void add_merge(struct branch *branch, const char *name)
178{
2d31347b
DB
179 ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
180 branch->merge_alloc);
181 branch->merge_name[branch->merge_nr++] = name;
cf818348
DB
182}
183
184static struct branch *make_branch(const char *name, int len)
185{
2d31347b
DB
186 struct branch *ret;
187 int i;
cf818348 188
2d31347b
DB
189 for (i = 0; i < branches_nr; i++) {
190 if (len ? (!strncmp(name, branches[i]->name, len) &&
191 !branches[i]->name[len]) :
192 !strcmp(name, branches[i]->name))
193 return branches[i];
cf818348
DB
194 }
195
2d31347b
DB
196 ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
197 ret = xcalloc(1, sizeof(struct branch));
198 branches[branches_nr++] = ret;
cf818348 199 if (len)
2d31347b 200 ret->name = xstrndup(name, len);
cf818348 201 else
2d31347b 202 ret->name = xstrdup(name);
fa3f60b7 203 ret->refname = xstrfmt("refs/heads/%s", ret->name);
cf818348 204
2d31347b 205 return ret;
cf818348
DB
206}
207
d071d942 208static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len)
55029ae4
DB
209{
210 struct rewrite *ret;
211 int i;
212
d071d942 213 for (i = 0; i < r->rewrite_nr; i++) {
844112ca 214 if (len
d071d942
JT
215 ? (len == r->rewrite[i]->baselen &&
216 !strncmp(base, r->rewrite[i]->base, len))
217 : !strcmp(base, r->rewrite[i]->base))
218 return r->rewrite[i];
55029ae4
DB
219 }
220
d071d942 221 ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc);
55029ae4 222 ret = xcalloc(1, sizeof(struct rewrite));
d071d942 223 r->rewrite[r->rewrite_nr++] = ret;
844112ca 224 if (len) {
55029ae4 225 ret->base = xstrndup(base, len);
844112ca
JH
226 ret->baselen = len;
227 }
228 else {
55029ae4 229 ret->base = xstrdup(base);
844112ca
JH
230 ret->baselen = strlen(base);
231 }
55029ae4
DB
232 return ret;
233}
234
235static void add_instead_of(struct rewrite *rewrite, const char *instead_of)
236{
237 ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc);
844112ca
JH
238 rewrite->instead_of[rewrite->instead_of_nr].s = instead_of;
239 rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of);
240 rewrite->instead_of_nr++;
55029ae4
DB
241}
242
0e265a92
JK
243static const char *skip_spaces(const char *s)
244{
245 while (isspace(*s))
246 s++;
247 return s;
248}
249
5751f490
DB
250static void read_remotes_file(struct remote *remote)
251{
0e265a92 252 struct strbuf buf = STRBUF_INIT;
5751f490
DB
253 FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
254
255 if (!f)
256 return;
89cf4c70 257 remote->origin = REMOTE_REMOTES;
0e265a92
JK
258 while (strbuf_getline(&buf, f, '\n') != EOF) {
259 const char *v;
5751f490 260
0e265a92 261 strbuf_rtrim(&buf);
5751f490 262
0e265a92
JK
263 if (skip_prefix(buf.buf, "URL:", &v))
264 add_url_alias(remote, xstrdup(skip_spaces(v)));
265 else if (skip_prefix(buf.buf, "Push:", &v))
266 add_push_refspec(remote, xstrdup(skip_spaces(v)));
267 else if (skip_prefix(buf.buf, "Pull:", &v))
268 add_fetch_refspec(remote, xstrdup(skip_spaces(v)));
5751f490 269 }
0e265a92 270 strbuf_release(&buf);
5751f490
DB
271 fclose(f);
272}
273
274static void read_branches_file(struct remote *remote)
275{
cf818348 276 char *frag;
f28e3ab2
JK
277 struct strbuf buf = STRBUF_INIT;
278 FILE *f = fopen(git_path("branches/%s", remote->name), "r");
5751f490
DB
279
280 if (!f)
281 return;
f28e3ab2
JK
282
283 strbuf_getline(&buf, f, '\n');
284 strbuf_trim(&buf);
285 if (!buf.len) {
286 strbuf_release(&buf);
5751f490 287 return;
f28e3ab2
JK
288 }
289
89cf4c70 290 remote->origin = REMOTE_BRANCHES;
472fa4cd
DB
291
292 /*
55cfde25 293 * The branches file would have URL and optionally
472fa4cd 294 * #branch specified. The "master" (or specified) branch is
f28e3ab2
JK
295 * fetched and stored in the local branch matching the
296 * remote name.
472fa4cd 297 */
f28e3ab2
JK
298 frag = strchr(buf.buf, '#');
299 if (frag)
cf818348 300 *(frag++) = '\0';
f28e3ab2
JK
301 else
302 frag = "master";
303
304 add_url_alias(remote, strbuf_detach(&buf, NULL));
305 add_fetch_refspec(remote, xstrfmt("refs/heads/%s:refs/heads/%s",
306 frag, remote->name));
55cfde25 307
18afe101
MK
308 /*
309 * Cogito compatible push: push current HEAD to remote #branch
310 * (master if missing)
311 */
f28e3ab2 312 add_push_refspec(remote, xstrfmt("HEAD:refs/heads/%s", frag));
d71ab174 313 remote->fetch_tags = 1; /* always auto-follow */
5751f490
DB
314}
315
ef90d6d4 316static int handle_config(const char *key, const char *value, void *cb)
5751f490
DB
317{
318 const char *name;
319 const char *subkey;
320 struct remote *remote;
cf818348 321 struct branch *branch;
59556548 322 if (starts_with(key, "branch.")) {
cf818348
DB
323 name = key + 7;
324 subkey = strrchr(name, '.');
cf818348
DB
325 if (!subkey)
326 return 0;
896c0535 327 branch = make_branch(name, subkey - name);
cf818348 328 if (!strcmp(subkey, ".remote")) {
e41bf352 329 return git_config_string(&branch->remote_name, key, value);
9f765ce6 330 } else if (!strcmp(subkey, ".pushremote")) {
da66b274 331 return git_config_string(&branch->pushremote_name, key, value);
d2370cc2
JH
332 } else if (!strcmp(subkey, ".merge")) {
333 if (!value)
334 return config_error_nonbool(key);
cf818348 335 add_merge(branch, xstrdup(value));
d2370cc2 336 }
cf818348 337 return 0;
5751f490 338 }
59556548 339 if (starts_with(key, "url.")) {
55029ae4 340 struct rewrite *rewrite;
60e3aba9 341 name = key + 4;
55029ae4
DB
342 subkey = strrchr(name, '.');
343 if (!subkey)
344 return 0;
55029ae4 345 if (!strcmp(subkey, ".insteadof")) {
1c2eafb8
JT
346 rewrite = make_rewrite(&rewrites, name, subkey - name);
347 if (!value)
348 return config_error_nonbool(key);
349 add_instead_of(rewrite, xstrdup(value));
350 } else if (!strcmp(subkey, ".pushinsteadof")) {
351 rewrite = make_rewrite(&rewrites_push, name, subkey - name);
55029ae4
DB
352 if (!value)
353 return config_error_nonbool(key);
354 add_instead_of(rewrite, xstrdup(value));
355 }
356 }
224c2171 357
59556548 358 if (!starts_with(key, "remote."))
5751f490
DB
359 return 0;
360 name = key + 7;
224c2171
RR
361
362 /* Handle remote.* variables */
363 if (!strcmp(name, "pushdefault"))
364 return git_config_string(&pushremote_name, key, value);
365
366 /* Handle remote.<name>.* variables */
c82efafc
BC
367 if (*name == '/') {
368 warning("Config remote shorthand cannot begin with '/': %s",
369 name);
370 return 0;
371 }
5751f490
DB
372 subkey = strrchr(name, '.');
373 if (!subkey)
cd294bc3 374 return 0;
5751f490 375 remote = make_remote(name, subkey - name);
89cf4c70 376 remote->origin = REMOTE_CONFIG;
84bb2dfd
PB
377 if (!strcmp(subkey, ".mirror"))
378 remote->mirror = git_config_bool(key, value);
379 else if (!strcmp(subkey, ".skipdefaultupdate"))
380 remote->skip_default_update = git_config_bool(key, value);
7cc91a2f
BG
381 else if (!strcmp(subkey, ".skipfetchall"))
382 remote->skip_default_update = git_config_bool(key, value);
737c5a9c
MS
383 else if (!strcmp(subkey, ".prune"))
384 remote->prune = git_config_bool(key, value);
84bb2dfd
PB
385 else if (!strcmp(subkey, ".url")) {
386 const char *v;
387 if (git_config_string(&v, key, value))
388 return -1;
389 add_url(remote, v);
20346234
MG
390 } else if (!strcmp(subkey, ".pushurl")) {
391 const char *v;
392 if (git_config_string(&v, key, value))
393 return -1;
394 add_pushurl(remote, v);
5751f490 395 } else if (!strcmp(subkey, ".push")) {
84bb2dfd
PB
396 const char *v;
397 if (git_config_string(&v, key, value))
398 return -1;
399 add_push_refspec(remote, v);
5d46c9d4 400 } else if (!strcmp(subkey, ".fetch")) {
84bb2dfd
PB
401 const char *v;
402 if (git_config_string(&v, key, value))
403 return -1;
404 add_fetch_refspec(remote, v);
5751f490 405 } else if (!strcmp(subkey, ".receivepack")) {
84bb2dfd
PB
406 const char *v;
407 if (git_config_string(&v, key, value))
408 return -1;
5751f490 409 if (!remote->receivepack)
84bb2dfd 410 remote->receivepack = v;
5751f490
DB
411 else
412 error("more than one receivepack given, using the first");
0012ba21 413 } else if (!strcmp(subkey, ".uploadpack")) {
84bb2dfd
PB
414 const char *v;
415 if (git_config_string(&v, key, value))
416 return -1;
0012ba21 417 if (!remote->uploadpack)
84bb2dfd 418 remote->uploadpack = v;
0012ba21
DB
419 else
420 error("more than one uploadpack given, using the first");
d71ab174
DB
421 } else if (!strcmp(subkey, ".tagopt")) {
422 if (!strcmp(value, "--no-tags"))
423 remote->fetch_tags = -1;
944163a4
ST
424 else if (!strcmp(value, "--tags"))
425 remote->fetch_tags = 2;
14c98218 426 } else if (!strcmp(subkey, ".proxy")) {
84bb2dfd
PB
427 return git_config_string((const char **)&remote->http_proxy,
428 key, value);
c578f51d
DB
429 } else if (!strcmp(subkey, ".vcs")) {
430 return git_config_string(&remote->foreign_vcs, key, value);
84bb2dfd 431 }
5751f490
DB
432 return 0;
433}
434
55029ae4
DB
435static void alias_all_urls(void)
436{
437 int i, j;
438 for (i = 0; i < remotes_nr; i++) {
1c2eafb8 439 int add_pushurl_aliases;
55029ae4
DB
440 if (!remotes[i])
441 continue;
20346234 442 for (j = 0; j < remotes[i]->pushurl_nr; j++) {
d071d942 443 remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
20346234 444 }
1c2eafb8
JT
445 add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
446 for (j = 0; j < remotes[i]->url_nr; j++) {
447 if (add_pushurl_aliases)
448 add_pushurl_alias(remotes[i], remotes[i]->url[j]);
449 remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
450 }
55029ae4
DB
451 }
452}
453
5751f490
DB
454static void read_config(void)
455{
e41bf352 456 static int loaded;
5751f490
DB
457 unsigned char sha1[20];
458 const char *head_ref;
459 int flag;
e41bf352
JK
460
461 if (loaded)
5751f490 462 return;
e41bf352
JK
463 loaded = 1;
464
5751f490 465 current_branch = NULL;
7695d118 466 head_ref = resolve_ref_unsafe("HEAD", 0, sha1, &flag);
5751f490 467 if (head_ref && (flag & REF_ISSYMREF) &&
95b567c7
JK
468 skip_prefix(head_ref, "refs/heads/", &head_ref)) {
469 current_branch = make_branch(head_ref, 0);
5751f490 470 }
ef90d6d4 471 git_config(handle_config, NULL);
55029ae4 472 alias_all_urls();
5751f490
DB
473}
474
2cb1f36d
BC
475/*
476 * This function frees a refspec array.
477 * Warning: code paths should be checked to ensure that the src
478 * and dst pointers are always freeable pointers as well
479 * as the refspec pointer itself.
480 */
697d7f5d 481static void free_refspecs(struct refspec *refspec, int nr_refspec)
2cb1f36d
BC
482{
483 int i;
484
485 if (!refspec)
486 return;
487
488 for (i = 0; i < nr_refspec; i++) {
489 free(refspec[i].src);
490 free(refspec[i].dst);
491 }
492 free(refspec);
493}
494
24b6177e 495static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify)
6b62816c
DB
496{
497 int i;
da7a478b 498 struct refspec *rs = xcalloc(nr_refspec, sizeof(*rs));
46220ca1 499
6b62816c 500 for (i = 0; i < nr_refspec; i++) {
47c6ef1c 501 size_t llen;
46220ca1
JH
502 int is_glob;
503 const char *lhs, *rhs;
8d9c5010 504 int flags;
46220ca1 505
8e76bf3f 506 is_glob = 0;
46220ca1
JH
507
508 lhs = refspec[i];
509 if (*lhs == '+') {
6b62816c 510 rs[i].force = 1;
46220ca1 511 lhs++;
6b62816c 512 }
46220ca1
JH
513
514 rhs = strrchr(lhs, ':');
a83619d6
PB
515
516 /*
517 * Before going on, special case ":" (or "+:") as a refspec
def24991 518 * for pushing matching refs.
a83619d6
PB
519 */
520 if (!fetch && rhs == lhs && rhs[1] == '\0') {
521 rs[i].matching = 1;
522 continue;
523 }
524
46220ca1 525 if (rhs) {
47c6ef1c 526 size_t rlen = strlen(++rhs);
abd2bde7 527 is_glob = (1 <= rlen && strchr(rhs, '*'));
08fbdb30 528 rs[i].dst = xstrndup(rhs, rlen);
6b62816c 529 }
ef00d150 530
46220ca1 531 llen = (rhs ? (rhs - lhs - 1) : strlen(lhs));
abd2bde7 532 if (1 <= llen && memchr(lhs, '*', llen)) {
7d19da46
JH
533 if ((rhs && !is_glob) || (!rhs && fetch))
534 goto invalid;
535 is_glob = 1;
7d19da46
JH
536 } else if (rhs && is_glob) {
537 goto invalid;
ef00d150 538 }
7d19da46 539
46220ca1
JH
540 rs[i].pattern = is_glob;
541 rs[i].src = xstrndup(lhs, llen);
8d9c5010 542 flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0);
46220ca1
JH
543
544 if (fetch) {
6e7b66ee
JH
545 unsigned char unused[40];
546
def24991 547 /* LHS */
46220ca1 548 if (!*rs[i].src)
def24991 549 ; /* empty is ok; it means "HEAD" */
6e7b66ee
JH
550 else if (llen == 40 && !get_sha1_hex(rs[i].src, unused))
551 rs[i].exact_sha1 = 1; /* ok */
def24991
JH
552 else if (!check_refname_format(rs[i].src, flags))
553 ; /* valid looking ref is ok */
554 else
8d9c5010 555 goto invalid;
def24991 556 /* RHS */
8d9c5010 557 if (!rs[i].dst)
def24991 558 ; /* missing is ok; it is the same as empty */
8d9c5010 559 else if (!*rs[i].dst)
def24991
JH
560 ; /* empty is ok; it means "do not store" */
561 else if (!check_refname_format(rs[i].dst, flags))
562 ; /* valid looking ref is ok */
563 else
8d9c5010 564 goto invalid;
46220ca1
JH
565 } else {
566 /*
567 * LHS
568 * - empty is allowed; it means delete.
569 * - when wildcarded, it must be a valid looking ref.
570 * - otherwise, it must be an extended SHA-1, but
571 * there is no existing way to validate this.
572 */
573 if (!*rs[i].src)
574 ; /* empty is ok */
575 else if (is_glob) {
8d9c5010 576 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
577 goto invalid;
578 }
579 else
580 ; /* anything goes, for now */
581 /*
582 * RHS
583 * - missing is allowed, but LHS then must be a
584 * valid looking ref.
585 * - empty is not allowed.
586 * - otherwise it must be a valid looking ref.
587 */
588 if (!rs[i].dst) {
8d9c5010 589 if (check_refname_format(rs[i].src, flags))
46220ca1
JH
590 goto invalid;
591 } else if (!*rs[i].dst) {
592 goto invalid;
593 } else {
8d9c5010 594 if (check_refname_format(rs[i].dst, flags))
46220ca1
JH
595 goto invalid;
596 }
ef00d150 597 }
6b62816c
DB
598 }
599 return rs;
46220ca1
JH
600
601 invalid:
24b6177e 602 if (verify) {
2cb1f36d
BC
603 /*
604 * nr_refspec must be greater than zero and i must be valid
605 * since it is only possible to reach this point from within
606 * the for loop above.
607 */
608 free_refspecs(rs, i+1);
24b6177e
JF
609 return NULL;
610 }
46220ca1
JH
611 die("Invalid refspec '%s'", refspec[i]);
612}
613
24b6177e
JF
614int valid_fetch_refspec(const char *fetch_refspec_str)
615{
24b6177e
JF
616 struct refspec *refspec;
617
66dbfd55 618 refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1);
2cb1f36d 619 free_refspecs(refspec, 1);
24b6177e
JF
620 return !!refspec;
621}
622
46220ca1
JH
623struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec)
624{
24b6177e 625 return parse_refspec_internal(nr_refspec, refspec, 1, 0);
46220ca1
JH
626}
627
697d7f5d 628static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec)
46220ca1 629{
24b6177e 630 return parse_refspec_internal(nr_refspec, refspec, 0, 0);
6b62816c
DB
631}
632
72ff8943
DB
633void free_refspec(int nr_refspec, struct refspec *refspec)
634{
635 int i;
636 for (i = 0; i < nr_refspec; i++) {
637 free(refspec[i].src);
638 free(refspec[i].dst);
639 }
640 free(refspec);
641}
642
df93e33c
DB
643static int valid_remote_nick(const char *name)
644{
8ca12c0d 645 if (!name[0] || is_dot_or_dotdot(name))
df93e33c
DB
646 return 0;
647 return !strchr(name, '/'); /* no slash */
648}
649
f052154d
JK
650const char *remote_for_branch(struct branch *branch, int *explicit)
651{
652 if (branch && branch->remote_name) {
653 if (explicit)
654 *explicit = 1;
655 return branch->remote_name;
656 }
657 if (explicit)
658 *explicit = 0;
659 return "origin";
660}
661
da66b274
JK
662const char *pushremote_for_branch(struct branch *branch, int *explicit)
663{
664 if (branch && branch->pushremote_name) {
665 if (explicit)
666 *explicit = 1;
667 return branch->pushremote_name;
668 }
669 if (pushremote_name) {
670 if (explicit)
671 *explicit = 1;
672 return pushremote_name;
673 }
674 return remote_for_branch(branch, explicit);
675}
676
677static struct remote *remote_get_1(const char *name,
678 const char *(*get_default)(struct branch *, int *))
5751f490
DB
679{
680 struct remote *ret;
fa685bdf 681 int name_given = 0;
5751f490 682
8770e6fb
JK
683 read_config();
684
fa685bdf
DB
685 if (name)
686 name_given = 1;
da66b274
JK
687 else
688 name = get_default(current_branch, &name_given);
9326d494 689
5751f490 690 ret = make_remote(name, 0);
df93e33c 691 if (valid_remote_nick(name)) {
0a4da29d 692 if (!valid_remote(ret))
5751f490 693 read_remotes_file(ret);
0a4da29d 694 if (!valid_remote(ret))
5751f490
DB
695 read_branches_file(ret);
696 }
0a4da29d 697 if (name_given && !valid_remote(ret))
55029ae4 698 add_url_alias(ret, name);
0a4da29d 699 if (!valid_remote(ret))
5751f490 700 return NULL;
46220ca1
JH
701 ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec);
702 ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec);
5751f490
DB
703 return ret;
704}
6b62816c 705
f24f715e
RR
706struct remote *remote_get(const char *name)
707{
da66b274 708 return remote_get_1(name, remote_for_branch);
f24f715e
RR
709}
710
711struct remote *pushremote_get(const char *name)
712{
da66b274 713 return remote_get_1(name, pushremote_for_branch);
f24f715e
RR
714}
715
9a23ba33
FAG
716int remote_is_configured(const char *name)
717{
d0da003d
PR
718 struct remotes_hash_key lookup;
719 struct hashmap_entry lookup_entry;
9a23ba33
FAG
720 read_config();
721
d0da003d
PR
722 init_remotes_hash();
723 lookup.str = name;
724 lookup.len = strlen(name);
725 hashmap_entry_init(&lookup_entry, memhash(name, lookup.len));
726
727 return hashmap_get(&remotes_hash, &lookup_entry, &lookup) != NULL;
9a23ba33
FAG
728}
729
b42f6927
JS
730int for_each_remote(each_remote_fn fn, void *priv)
731{
732 int i, result = 0;
733 read_config();
2d31347b 734 for (i = 0; i < remotes_nr && !result; i++) {
b42f6927
JS
735 struct remote *r = remotes[i];
736 if (!r)
737 continue;
738 if (!r->fetch)
46220ca1
JH
739 r->fetch = parse_fetch_refspec(r->fetch_refspec_nr,
740 r->fetch_refspec);
b42f6927 741 if (!r->push)
46220ca1
JH
742 r->push = parse_push_refspec(r->push_refspec_nr,
743 r->push_refspec);
b42f6927
JS
744 result = fn(r, priv);
745 }
746 return result;
747}
748
df02ebda
MH
749static void handle_duplicate(struct ref *ref1, struct ref *ref2)
750{
f096e6e8
MH
751 if (strcmp(ref1->name, ref2->name)) {
752 if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
753 ref2->fetch_head_status != FETCH_HEAD_IGNORE) {
754 die(_("Cannot fetch both %s and %s to %s"),
755 ref1->name, ref2->name, ref2->peer_ref->name);
756 } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE &&
757 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
758 warning(_("%s usually tracks %s, not %s"),
759 ref2->peer_ref->name, ref2->name, ref1->name);
760 } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE &&
761 ref2->fetch_head_status == FETCH_HEAD_IGNORE) {
762 die(_("%s tracks both %s and %s"),
763 ref2->peer_ref->name, ref1->name, ref2->name);
764 } else {
765 /*
766 * This last possibility doesn't occur because
767 * FETCH_HEAD_IGNORE entries always appear at
768 * the end of the list.
769 */
770 die(_("Internal error"));
771 }
772 }
df02ebda
MH
773 free(ref2->peer_ref);
774 free(ref2);
775}
776
b9afe665 777struct ref *ref_remove_duplicates(struct ref *ref_map)
2467a4fa 778{
183113a5 779 struct string_list refs = STRING_LIST_INIT_NODUP;
b9afe665
MH
780 struct ref *retval = NULL;
781 struct ref **p = &retval;
73cf0822 782
b9afe665
MH
783 while (ref_map) {
784 struct ref *ref = ref_map;
785
786 ref_map = ref_map->next;
787 ref->next = NULL;
73cf0822 788
b9afe665
MH
789 if (!ref->peer_ref) {
790 *p = ref;
791 p = &ref->next;
09ea1f8e 792 } else {
b9afe665
MH
793 struct string_list_item *item =
794 string_list_insert(&refs, ref->peer_ref->name);
795
796 if (item->util) {
797 /* Entry already existed */
df02ebda 798 handle_duplicate((struct ref *)item->util, ref);
b9afe665
MH
799 } else {
800 *p = ref;
801 p = &ref->next;
802 item->util = ref;
803 }
2467a4fa
DB
804 }
805 }
b9afe665 806
73cf0822 807 string_list_clear(&refs, 0);
b9afe665 808 return retval;
2467a4fa
DB
809}
810
28b91f8a 811int remote_has_url(struct remote *remote, const char *url)
5d46c9d4
DB
812{
813 int i;
28b91f8a
SP
814 for (i = 0; i < remote->url_nr; i++) {
815 if (!strcmp(remote->url[i], url))
5d46c9d4
DB
816 return 1;
817 }
818 return 0;
819}
820
e928213f
DB
821static int match_name_with_pattern(const char *key, const char *name,
822 const char *value, char **result)
a3c84239 823{
08fbdb30
DB
824 const char *kstar = strchr(key, '*');
825 size_t klen;
abd2bde7
DB
826 size_t ksuffixlen;
827 size_t namelen;
08fbdb30
DB
828 int ret;
829 if (!kstar)
830 die("Key '%s' of pattern had no '*'", key);
831 klen = kstar - key;
abd2bde7
DB
832 ksuffixlen = strlen(kstar + 1);
833 namelen = strlen(name);
834 ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen &&
835 !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen);
e928213f 836 if (ret && value) {
07bfa575 837 struct strbuf sb = STRBUF_INIT;
08fbdb30 838 const char *vstar = strchr(value, '*');
08fbdb30
DB
839 if (!vstar)
840 die("Value '%s' of pattern has no '*'", value);
07bfa575
RS
841 strbuf_add(&sb, value, vstar - value);
842 strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen);
843 strbuf_addstr(&sb, vstar + 1);
844 *result = strbuf_detach(&sb, NULL);
e928213f 845 }
a3c84239
DB
846 return ret;
847}
848
e6f63712
CMN
849static void query_refspecs_multiple(struct refspec *refs, int ref_count, struct refspec *query, struct string_list *results)
850{
851 int i;
852 int find_src = !query->src;
853
854 if (find_src && !query->dst)
855 error("query_refspecs_multiple: need either src or dst");
856
857 for (i = 0; i < ref_count; i++) {
858 struct refspec *refspec = &refs[i];
859 const char *key = find_src ? refspec->dst : refspec->src;
860 const char *value = find_src ? refspec->src : refspec->dst;
861 const char *needle = find_src ? query->dst : query->src;
862 char **result = find_src ? &query->src : &query->dst;
863
864 if (!refspec->dst)
865 continue;
866 if (refspec->pattern) {
867 if (match_name_with_pattern(key, needle, value, result))
868 string_list_append_nodup(results, *result);
869 } else if (!strcmp(needle, key)) {
870 string_list_append(results, value);
871 }
872 }
873}
874
ca02465b 875int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query)
72ff8943
DB
876{
877 int i;
c500352e 878 int find_src = !query->src;
049bff8f
MH
879 const char *needle = find_src ? query->dst : query->src;
880 char **result = find_src ? &query->src : &query->dst;
72ff8943 881
c500352e
CMN
882 if (find_src && !query->dst)
883 return error("query_refspecs: need either src or dst");
b42f6927 884
c500352e
CMN
885 for (i = 0; i < ref_count; i++) {
886 struct refspec *refspec = &refs[i];
887 const char *key = find_src ? refspec->dst : refspec->src;
888 const char *value = find_src ? refspec->src : refspec->dst;
b42f6927 889
c500352e 890 if (!refspec->dst)
5d46c9d4 891 continue;
c500352e 892 if (refspec->pattern) {
e928213f 893 if (match_name_with_pattern(key, needle, value, result)) {
c500352e 894 query->force = refspec->force;
5d46c9d4
DB
895 return 0;
896 }
b42f6927
JS
897 } else if (!strcmp(needle, key)) {
898 *result = xstrdup(value);
c500352e 899 query->force = refspec->force;
b42f6927 900 return 0;
5d46c9d4
DB
901 }
902 }
5d46c9d4
DB
903 return -1;
904}
905
c500352e
CMN
906char *apply_refspecs(struct refspec *refspecs, int nr_refspec,
907 const char *name)
908{
909 struct refspec query;
910
911 memset(&query, 0, sizeof(struct refspec));
912 query.src = (char *)name;
913
914 if (query_refspecs(refspecs, nr_refspec, &query))
915 return NULL;
916
917 return query.dst;
918}
919
920int remote_find_tracking(struct remote *remote, struct refspec *refspec)
921{
922 return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec);
923}
924
8009768e
RS
925static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen,
926 const char *name)
927{
928 size_t len = strlen(name);
929 struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1);
930 memcpy(ref->name, prefix, prefixlen);
931 memcpy(ref->name + prefixlen, name, len);
932 return ref;
933}
934
59c69c0c 935struct ref *alloc_ref(const char *name)
dfd255dd 936{
59c69c0c 937 return alloc_ref_with_prefix("", 0, name);
737922aa
KK
938}
939
59a57757 940struct ref *copy_ref(const struct ref *ref)
d71ab174 941{
7b3db095
JS
942 struct ref *cpy;
943 size_t len;
944 if (!ref)
945 return NULL;
946 len = strlen(ref->name);
947 cpy = xmalloc(sizeof(struct ref) + len + 1);
948 memcpy(cpy, ref, sizeof(struct ref) + len + 1);
949 cpy->next = NULL;
8c53f071
JK
950 cpy->symref = xstrdup_or_null(ref->symref);
951 cpy->remote_status = xstrdup_or_null(ref->remote_status);
7b3db095
JS
952 cpy->peer_ref = copy_ref(ref->peer_ref);
953 return cpy;
d71ab174
DB
954}
955
4577370e
DB
956struct ref *copy_ref_list(const struct ref *ref)
957{
958 struct ref *ret = NULL;
959 struct ref **tail = &ret;
960 while (ref) {
961 *tail = copy_ref(ref);
962 ref = ref->next;
963 tail = &((*tail)->next);
964 }
965 return ret;
966}
967
697d7f5d 968static void free_ref(struct ref *ref)
be885d96
DB
969{
970 if (!ref)
971 return;
7b3db095 972 free_ref(ref->peer_ref);
be885d96
DB
973 free(ref->remote_status);
974 free(ref->symref);
975 free(ref);
976}
977
dfd255dd
DB
978void free_refs(struct ref *ref)
979{
980 struct ref *next;
981 while (ref) {
982 next = ref->next;
be885d96 983 free_ref(ref);
dfd255dd
DB
984 ref = next;
985 }
986}
987
ed81c76b
JK
988int ref_compare_name(const void *va, const void *vb)
989{
990 const struct ref *a = va, *b = vb;
991 return strcmp(a->name, b->name);
992}
993
994static void *ref_list_get_next(const void *a)
995{
996 return ((const struct ref *)a)->next;
997}
998
999static void ref_list_set_next(void *a, void *next)
1000{
1001 ((struct ref *)a)->next = next;
1002}
1003
1004void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
1005{
1006 *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
1007}
1008
ca02465b
JH
1009int count_refspec_match(const char *pattern,
1010 struct ref *refs,
1011 struct ref **matched_ref)
6b62816c
DB
1012{
1013 int patlen = strlen(pattern);
1014 struct ref *matched_weak = NULL;
1015 struct ref *matched = NULL;
1016 int weak_match = 0;
1017 int match = 0;
1018
1019 for (weak_match = match = 0; refs; refs = refs->next) {
1020 char *name = refs->name;
1021 int namelen = strlen(name);
6b62816c 1022
54457fe5 1023 if (!refname_match(pattern, name))
6b62816c
DB
1024 continue;
1025
1026 /* A match is "weak" if it is with refs outside
1027 * heads or tags, and did not specify the pattern
1028 * in full (e.g. "refs/remotes/origin/master") or at
1029 * least from the toplevel (e.g. "remotes/origin/master");
1030 * otherwise "git push $URL master" would result in
1031 * ambiguity between remotes/origin/master and heads/master
1032 * at the remote site.
1033 */
1034 if (namelen != patlen &&
1035 patlen != namelen - 5 &&
59556548
CC
1036 !starts_with(name, "refs/heads/") &&
1037 !starts_with(name, "refs/tags/")) {
6b62816c
DB
1038 /* We want to catch the case where only weak
1039 * matches are found and there are multiple
1040 * matches, and where more than one strong
1041 * matches are found, as ambiguous. One
1042 * strong match with zero or more weak matches
1043 * are acceptable as a unique match.
1044 */
1045 matched_weak = refs;
1046 weak_match++;
1047 }
1048 else {
1049 matched = refs;
1050 match++;
1051 }
1052 }
1053 if (!matched) {
471fd3fe
JK
1054 if (matched_ref)
1055 *matched_ref = matched_weak;
6b62816c
DB
1056 return weak_match;
1057 }
1058 else {
471fd3fe
JK
1059 if (matched_ref)
1060 *matched_ref = matched;
6b62816c
DB
1061 return match;
1062 }
1063}
1064
1d735267 1065static void tail_link_ref(struct ref *ref, struct ref ***tail)
6b62816c
DB
1066{
1067 **tail = ref;
1d735267
DB
1068 while (ref->next)
1069 ref = ref->next;
6b62816c 1070 *tail = &ref->next;
6b62816c
DB
1071}
1072
67655246
FC
1073static struct ref *alloc_delete_ref(void)
1074{
1075 struct ref *ref = alloc_ref("(delete)");
1076 hashclr(ref->new_sha1);
1077 return ref;
1078}
1079
471fd3fe
JK
1080static int try_explicit_object_name(const char *name,
1081 struct ref **match)
6b62816c
DB
1082{
1083 unsigned char sha1[20];
6b62816c 1084
471fd3fe
JK
1085 if (!*name) {
1086 if (match)
1087 *match = alloc_delete_ref();
1088 return 0;
1089 }
1090
6b62816c 1091 if (get_sha1(name, sha1))
471fd3fe
JK
1092 return -1;
1093
1094 if (match) {
1095 *match = alloc_ref(name);
1096 hashcpy((*match)->new_sha1, sha1);
1097 }
1098 return 0;
6b62816c
DB
1099}
1100
1d735267 1101static struct ref *make_linked_ref(const char *name, struct ref ***tail)
6b62816c 1102{
59c69c0c 1103 struct ref *ret = alloc_ref(name);
1d735267
DB
1104 tail_link_ref(ret, tail);
1105 return ret;
163f0ee5 1106}
8558fd9e 1107
f8aae120
JK
1108static char *guess_ref(const char *name, struct ref *peer)
1109{
1110 struct strbuf buf = STRBUF_INIT;
1111 unsigned char sha1[20];
1112
7695d118
RS
1113 const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING,
1114 sha1, NULL);
f8aae120
JK
1115 if (!r)
1116 return NULL;
1117
59556548 1118 if (starts_with(r, "refs/heads/"))
f8aae120 1119 strbuf_addstr(&buf, "refs/heads/");
59556548 1120 else if (starts_with(r, "refs/tags/"))
f8aae120
JK
1121 strbuf_addstr(&buf, "refs/tags/");
1122 else
1123 return NULL;
1124
1125 strbuf_addstr(&buf, name);
1126 return strbuf_detach(&buf, NULL);
1127}
1128
f7ade3d3
JK
1129static int match_explicit_lhs(struct ref *src,
1130 struct refspec *rs,
1131 struct ref **match,
1132 int *allocated_match)
1133{
1134 switch (count_refspec_match(rs->src, src, match)) {
1135 case 1:
471fd3fe
JK
1136 if (allocated_match)
1137 *allocated_match = 0;
f7ade3d3
JK
1138 return 0;
1139 case 0:
1140 /* The source could be in the get_sha1() format
1141 * not a reference name. :refs/other is a
1142 * way to delete 'other' ref at the remote end.
1143 */
471fd3fe 1144 if (try_explicit_object_name(rs->src, match) < 0)
f7ade3d3 1145 return error("src refspec %s does not match any.", rs->src);
471fd3fe
JK
1146 if (allocated_match)
1147 *allocated_match = 1;
f7ade3d3
JK
1148 return 0;
1149 default:
1150 return error("src refspec %s matches more than one.", rs->src);
1151 }
1152}
1153
54a8ad92
JH
1154static int match_explicit(struct ref *src, struct ref *dst,
1155 struct ref ***dst_tail,
9a7bbd1d 1156 struct refspec *rs)
6b62816c 1157{
54a8ad92 1158 struct ref *matched_src, *matched_dst;
f7ade3d3 1159 int allocated_src;
8558fd9e 1160
54a8ad92 1161 const char *dst_value = rs->dst;
f8aae120 1162 char *dst_guess;
6b62816c 1163
a83619d6 1164 if (rs->pattern || rs->matching)
9a7bbd1d 1165 return 0;
8558fd9e 1166
54a8ad92 1167 matched_src = matched_dst = NULL;
f7ade3d3
JK
1168 if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0)
1169 return -1;
3c8b7df1 1170
4491e62a 1171 if (!dst_value) {
9f0ea7e8
DB
1172 unsigned char sha1[20];
1173 int flag;
1174
7695d118
RS
1175 dst_value = resolve_ref_unsafe(matched_src->name,
1176 RESOLVE_REF_READING,
1177 sha1, &flag);
9f0ea7e8
DB
1178 if (!dst_value ||
1179 ((flag & REF_ISSYMREF) &&
59556548 1180 !starts_with(dst_value, "refs/heads/")))
9f0ea7e8
DB
1181 die("%s cannot be resolved to branch.",
1182 matched_src->name);
4491e62a 1183 }
3c8b7df1 1184
54a8ad92
JH
1185 switch (count_refspec_match(dst_value, dst, &matched_dst)) {
1186 case 1:
1187 break;
1188 case 0:
50e19a83 1189 if (starts_with(dst_value, "refs/"))
1d735267 1190 matched_dst = make_linked_ref(dst_value, dst_tail);
5742c82b
JK
1191 else if (is_null_sha1(matched_src->new_sha1))
1192 error("unable to delete '%s': remote ref does not exist",
1193 dst_value);
eeefa7c9 1194 else if ((dst_guess = guess_ref(dst_value, matched_src)))
f8aae120 1195 matched_dst = make_linked_ref(dst_guess, dst_tail);
3c8b7df1 1196 else
f8aae120
JK
1197 error("unable to push to unqualified destination: %s\n"
1198 "The destination refspec neither matches an "
1199 "existing ref on the remote nor\n"
1200 "begins with refs/, and we are unable to "
1201 "guess a prefix based on the source ref.",
1202 dst_value);
54a8ad92
JH
1203 break;
1204 default:
3c8b7df1 1205 matched_dst = NULL;
54a8ad92
JH
1206 error("dst refspec %s matches more than one.",
1207 dst_value);
1208 break;
1209 }
9a7bbd1d
JK
1210 if (!matched_dst)
1211 return -1;
1212 if (matched_dst->peer_ref)
1213 return error("dst ref %s receives from more than one src.",
54a8ad92 1214 matched_dst->name);
54a8ad92 1215 else {
f7ade3d3
JK
1216 matched_dst->peer_ref = allocated_src ?
1217 matched_src :
1218 copy_ref(matched_src);
54a8ad92 1219 matched_dst->force = rs->force;
6b62816c 1220 }
9a7bbd1d 1221 return 0;
54a8ad92
JH
1222}
1223
1224static int match_explicit_refs(struct ref *src, struct ref *dst,
1225 struct ref ***dst_tail, struct refspec *rs,
1226 int rs_nr)
1227{
1228 int i, errs;
1229 for (i = errs = 0; i < rs_nr; i++)
9a7bbd1d
JK
1230 errs += match_explicit(src, dst, dst_tail, &rs[i]);
1231 return errs;
6b62816c
DB
1232}
1233
db70a04c 1234static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
6ddba5e2 1235 int send_mirror, int direction, const struct refspec **ret_pat)
8558fd9e 1236{
db70a04c
FC
1237 const struct refspec *pat;
1238 char *name;
8558fd9e 1239 int i;
a83619d6 1240 int matching_refs = -1;
8558fd9e 1241 for (i = 0; i < rs_nr; i++) {
a83619d6
PB
1242 if (rs[i].matching &&
1243 (matching_refs == -1 || rs[i].force)) {
1244 matching_refs = i;
1245 continue;
1246 }
1247
db70a04c
FC
1248 if (rs[i].pattern) {
1249 const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
6ddba5e2
FC
1250 int match;
1251 if (direction == FROM_SRC)
1252 match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
1253 else
1254 match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
1255 if (match) {
db70a04c
FC
1256 matching_refs = i;
1257 break;
1258 }
1259 }
8558fd9e 1260 }
db70a04c 1261 if (matching_refs == -1)
a83619d6 1262 return NULL;
db70a04c
FC
1263
1264 pat = rs + matching_refs;
1265 if (pat->matching) {
1266 /*
1267 * "matching refs"; traditionally we pushed everything
1268 * including refs outside refs/heads/ hierarchy, but
1269 * that does not make much sense these days.
1270 */
59556548 1271 if (!send_mirror && !starts_with(ref->name, "refs/heads/"))
db70a04c
FC
1272 return NULL;
1273 name = xstrdup(ref->name);
1274 }
1275 if (ret_pat)
1276 *ret_pat = pat;
1277 return name;
8558fd9e
DB
1278}
1279
6d2bf96e
CB
1280static struct ref **tail_ref(struct ref **head)
1281{
1282 struct ref **tail = head;
1283 while (*tail)
1284 tail = &((*tail)->next);
1285 return tail;
1286}
1287
c2aba155
JH
1288struct tips {
1289 struct commit **tip;
1290 int nr, alloc;
1291};
1292
1293static void add_to_tips(struct tips *tips, const unsigned char *sha1)
1294{
1295 struct commit *commit;
1296
1297 if (is_null_sha1(sha1))
1298 return;
1299 commit = lookup_commit_reference_gently(sha1, 1);
1300 if (!commit || (commit->object.flags & TMP_MARK))
1301 return;
1302 commit->object.flags |= TMP_MARK;
1303 ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc);
1304 tips->tip[tips->nr++] = commit;
1305}
1306
1307static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail)
1308{
1309 struct string_list dst_tag = STRING_LIST_INIT_NODUP;
1310 struct string_list src_tag = STRING_LIST_INIT_NODUP;
1311 struct string_list_item *item;
1312 struct ref *ref;
1313 struct tips sent_tips;
1314
1315 /*
1316 * Collect everything we know they would have at the end of
1317 * this push, and collect all tags they have.
1318 */
1319 memset(&sent_tips, 0, sizeof(sent_tips));
1320 for (ref = *dst; ref; ref = ref->next) {
1321 if (ref->peer_ref &&
1322 !is_null_sha1(ref->peer_ref->new_sha1))
1323 add_to_tips(&sent_tips, ref->peer_ref->new_sha1);
1324 else
1325 add_to_tips(&sent_tips, ref->old_sha1);
59556548 1326 if (starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1327 string_list_append(&dst_tag, ref->name);
1328 }
1329 clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK);
1330
3383e199 1331 string_list_sort(&dst_tag);
c2aba155
JH
1332
1333 /* Collect tags they do not have. */
1334 for (ref = src; ref; ref = ref->next) {
59556548 1335 if (!starts_with(ref->name, "refs/tags/"))
c2aba155
JH
1336 continue; /* not a tag */
1337 if (string_list_has_string(&dst_tag, ref->name))
1338 continue; /* they already have it */
1339 if (sha1_object_info(ref->new_sha1, NULL) != OBJ_TAG)
1340 continue; /* be conservative */
1341 item = string_list_append(&src_tag, ref->name);
1342 item->util = ref;
1343 }
1344 string_list_clear(&dst_tag, 0);
1345
1346 /*
1347 * At this point, src_tag lists tags that are missing from
1348 * dst, and sent_tips lists the tips we are pushing or those
1349 * that we know they already have. An element in the src_tag
1350 * that is an ancestor of any of the sent_tips needs to be
1351 * sent to the other side.
1352 */
1353 if (sent_tips.nr) {
1354 for_each_string_list_item(item, &src_tag) {
1355 struct ref *ref = item->util;
1356 struct ref *dst_ref;
1357 struct commit *commit;
1358
1359 if (is_null_sha1(ref->new_sha1))
1360 continue;
1361 commit = lookup_commit_reference_gently(ref->new_sha1, 1);
1362 if (!commit)
1363 /* not pushing a commit, which is not an error */
1364 continue;
1365
1366 /*
1367 * Is this tag, which they do not have, reachable from
1368 * any of the commits we are sending?
1369 */
1370 if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip))
1371 continue;
1372
1373 /* Add it in */
1374 dst_ref = make_linked_ref(ref->name, dst_tail);
1375 hashcpy(dst_ref->new_sha1, ref->new_sha1);
1376 dst_ref->peer_ref = copy_ref(ref);
1377 }
1378 }
1379 string_list_clear(&src_tag, 0);
1380 free(sent_tips.tip);
1381}
1382
47a59185
JH
1383struct ref *find_ref_by_name(const struct ref *list, const char *name)
1384{
1385 for ( ; list; list = list->next)
1386 if (!strcmp(list->name, name))
1387 return (struct ref *)list;
1388 return NULL;
1389}
1390
f1bd15ab
BC
1391static void prepare_ref_index(struct string_list *ref_index, struct ref *ref)
1392{
1393 for ( ; ref; ref = ref->next)
1394 string_list_append_nodup(ref_index, ref->name)->util = ref;
1395
3383e199 1396 string_list_sort(ref_index);
f1bd15ab
BC
1397}
1398
ba928c13
JK
1399/*
1400 * Given only the set of local refs, sanity-check the set of push
1401 * refspecs. We can't catch all errors that match_push_refs would,
1402 * but we can catch some errors early before even talking to the
1403 * remote side.
1404 */
1405int check_push_refs(struct ref *src, int nr_refspec, const char **refspec_names)
1406{
1407 struct refspec *refspec = parse_push_refspec(nr_refspec, refspec_names);
1408 int ret = 0;
1409 int i;
1410
1411 for (i = 0; i < nr_refspec; i++) {
1412 struct refspec *rs = refspec + i;
1413
1414 if (rs->pattern || rs->matching)
1415 continue;
1416
1417 ret |= match_explicit_lhs(src, rs, NULL, NULL);
1418 }
1419
1420 free_refspec(nr_refspec, refspec);
1421 return ret;
1422}
1423
54a8ad92 1424/*
29753cdd
JH
1425 * Given the set of refs the local repository has, the set of refs the
1426 * remote repository has, and the refspec used for push, determine
1427 * what remote refs we will update and with what value by setting
1428 * peer_ref (which object is being pushed) and force (if the push is
1429 * forced) in elements of "dst". The function may add new elements to
1430 * dst (e.g. pushing to a new branch, done in match_explicit_refs).
54a8ad92 1431 */
29753cdd
JH
1432int match_push_refs(struct ref *src, struct ref **dst,
1433 int nr_refspec, const char **refspec, int flags)
6b62816c 1434{
a83619d6 1435 struct refspec *rs;
28b9d6e5
AW
1436 int send_all = flags & MATCH_REFS_ALL;
1437 int send_mirror = flags & MATCH_REFS_MIRROR;
6ddba5e2 1438 int send_prune = flags & MATCH_REFS_PRUNE;
5f48cb95 1439 int errs;
2af202be 1440 static const char *default_refspec[] = { ":", NULL };
b1d8b1f3 1441 struct ref *ref, **dst_tail = tail_ref(dst);
f1bd15ab 1442 struct string_list dst_ref_index = STRING_LIST_INIT_NODUP;
6b62816c 1443
a83619d6
PB
1444 if (!nr_refspec) {
1445 nr_refspec = 1;
1446 refspec = default_refspec;
1447 }
1448 rs = parse_push_refspec(nr_refspec, (const char **) refspec);
6d2bf96e 1449 errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
6b62816c
DB
1450
1451 /* pick the remainder */
b1d8b1f3 1452 for (ref = src; ref; ref = ref->next) {
f1bd15ab 1453 struct string_list_item *dst_item;
6b62816c 1454 struct ref *dst_peer;
6e66bf3c
AR
1455 const struct refspec *pat = NULL;
1456 char *dst_name;
db70a04c 1457
6ddba5e2 1458 dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
db70a04c 1459 if (!dst_name)
a83619d6
PB
1460 continue;
1461
f1bd15ab
BC
1462 if (!dst_ref_index.nr)
1463 prepare_ref_index(&dst_ref_index, *dst);
1464
1465 dst_item = string_list_lookup(&dst_ref_index, dst_name);
1466 dst_peer = dst_item ? dst_item->util : NULL;
a83619d6
PB
1467 if (dst_peer) {
1468 if (dst_peer->peer_ref)
1469 /* We're already sending something to this ref. */
1470 goto free_name;
a83619d6
PB
1471 } else {
1472 if (pat->matching && !(send_all || send_mirror))
1473 /*
1474 * Remote doesn't have it, and we have no
1475 * explicit pattern, and we don't have
01689909 1476 * --all or --mirror.
a83619d6
PB
1477 */
1478 goto free_name;
28b9d6e5 1479
6b62816c 1480 /* Create a new one and link it */
6d2bf96e 1481 dst_peer = make_linked_ref(dst_name, &dst_tail);
b1d8b1f3 1482 hashcpy(dst_peer->new_sha1, ref->new_sha1);
f1bd15ab
BC
1483 string_list_insert(&dst_ref_index,
1484 dst_peer->name)->util = dst_peer;
6b62816c 1485 }
b1d8b1f3 1486 dst_peer->peer_ref = copy_ref(ref);
a83619d6 1487 dst_peer->force = pat->force;
6e66bf3c
AR
1488 free_name:
1489 free(dst_name);
6b62816c 1490 }
c2aba155 1491
f1bd15ab
BC
1492 string_list_clear(&dst_ref_index, 0);
1493
c2aba155
JH
1494 if (flags & MATCH_REFS_FOLLOW_TAGS)
1495 add_missing_tags(src, dst, &dst_tail);
1496
6ddba5e2 1497 if (send_prune) {
f1bd15ab 1498 struct string_list src_ref_index = STRING_LIST_INIT_NODUP;
6ddba5e2
FC
1499 /* check for missing refs on the remote */
1500 for (ref = *dst; ref; ref = ref->next) {
1501 char *src_name;
1502
1503 if (ref->peer_ref)
1504 /* We're already sending something to this ref. */
1505 continue;
1506
1507 src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
1508 if (src_name) {
f1bd15ab
BC
1509 if (!src_ref_index.nr)
1510 prepare_ref_index(&src_ref_index, src);
1511 if (!string_list_has_string(&src_ref_index,
1512 src_name))
6ddba5e2
FC
1513 ref->peer_ref = alloc_delete_ref();
1514 free(src_name);
1515 }
1516 }
f1bd15ab 1517 string_list_clear(&src_ref_index, 0);
6ddba5e2 1518 }
5f48cb95
JS
1519 if (errs)
1520 return -1;
6b62816c
DB
1521 return 0;
1522}
cf818348 1523
20e8b465 1524void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
631b5ef2 1525 int force_update)
20e8b465
TRC
1526{
1527 struct ref *ref;
1528
1529 for (ref = remote_refs; ref; ref = ref->next) {
8c5f6f71 1530 int force_ref_update = ref->force || force_update;
631b5ef2 1531 int reject_reason = 0;
8c5f6f71 1532
20e8b465
TRC
1533 if (ref->peer_ref)
1534 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1535 else if (!send_mirror)
1536 continue;
1537
1538 ref->deletion = is_null_sha1(ref->new_sha1);
1539 if (!ref->deletion &&
1540 !hashcmp(ref->old_sha1, ref->new_sha1)) {
1541 ref->status = REF_STATUS_UPTODATE;
1542 continue;
1543 }
1544
a272b289 1545 /*
631b5ef2
JH
1546 * Bypass the usual "must fast-forward" check but
1547 * replace it with a weaker "the old value must be
1548 * this value we observed". If the remote ref has
1549 * moved and is now different from what we expect,
1550 * reject any push.
1551 *
1552 * It also is an error if the user told us to check
1553 * with the remote-tracking branch to find the value
1554 * to expect, but we did not have such a tracking
1555 * branch.
1556 */
1557 if (ref->expect_old_sha1) {
1558 if (ref->expect_old_no_trackback ||
1559 hashcmp(ref->old_sha1, ref->old_sha1_expect))
1560 reject_reason = REF_STATUS_REJECT_STALE;
1561 }
1562
1563 /*
1564 * The usual "must fast-forward" rules.
1565 *
256b9d70
JH
1566 * Decide whether an individual refspec A:B can be
1567 * pushed. The push will succeed if any of the
1568 * following are true:
20e8b465 1569 *
a272b289 1570 * (1) the remote reference B does not exist
20e8b465 1571 *
a272b289
CR
1572 * (2) the remote reference B is being removed (i.e.,
1573 * pushing :B where no source is specified)
20e8b465 1574 *
256b9d70
JH
1575 * (3) the destination is not under refs/tags/, and
1576 * if the old and new value is a commit, the new
1577 * is a descendant of the old.
20e8b465 1578 *
a272b289
CR
1579 * (4) it is forced using the +A:B notation, or by
1580 * passing the --force argument
20e8b465
TRC
1581 */
1582
631b5ef2 1583 else if (!ref->deletion && !is_null_sha1(ref->old_sha1)) {
59556548 1584 if (starts_with(ref->name, "refs/tags/"))
631b5ef2 1585 reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
75e5c0dc 1586 else if (!has_sha1_file(ref->old_sha1))
631b5ef2 1587 reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
75e5c0dc
JH
1588 else if (!lookup_commit_reference_gently(ref->old_sha1, 1) ||
1589 !lookup_commit_reference_gently(ref->new_sha1, 1))
631b5ef2 1590 reject_reason = REF_STATUS_REJECT_NEEDS_FORCE;
75e5c0dc 1591 else if (!ref_newer(ref->new_sha1, ref->old_sha1))
631b5ef2 1592 reject_reason = REF_STATUS_REJECT_NONFASTFORWARD;
20e8b465 1593 }
631b5ef2
JH
1594
1595 /*
1596 * "--force" will defeat any rejection implemented
1597 * by the rules above.
1598 */
1599 if (!force_ref_update)
1600 ref->status = reject_reason;
1601 else if (reject_reason)
1602 ref->forced_update = 1;
20e8b465
TRC
1603 }
1604}
1605
05e73682
JH
1606static void set_merge(struct branch *ret)
1607{
9e3751d4 1608 struct remote *remote;
05e73682
JH
1609 char *ref;
1610 unsigned char sha1[20];
1611 int i;
1612
ee2499fe
JK
1613 if (!ret)
1614 return; /* no branch */
1615 if (ret->merge)
1616 return; /* already run */
1617 if (!ret->remote_name || !ret->merge_nr) {
1618 /*
1619 * no merge config; let's make sure we don't confuse callers
1620 * with a non-zero merge_nr but a NULL merge
1621 */
1622 ret->merge_nr = 0;
1623 return;
1624 }
1625
9e3751d4
JK
1626 remote = remote_get(ret->remote_name);
1627
05e73682
JH
1628 ret->merge = xcalloc(ret->merge_nr, sizeof(*ret->merge));
1629 for (i = 0; i < ret->merge_nr; i++) {
1630 ret->merge[i] = xcalloc(1, sizeof(**ret->merge));
1631 ret->merge[i]->src = xstrdup(ret->merge_name[i]);
9e3751d4 1632 if (!remote_find_tracking(remote, ret->merge[i]) ||
05e73682
JH
1633 strcmp(ret->remote_name, "."))
1634 continue;
1635 if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
1636 sha1, &ref) == 1)
1637 ret->merge[i]->dst = ref;
1638 else
1639 ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
1640 }
1641}
1642
cf818348
DB
1643struct branch *branch_get(const char *name)
1644{
1645 struct branch *ret;
1646
1647 read_config();
1648 if (!name || !*name || !strcmp(name, "HEAD"))
1649 ret = current_branch;
1650 else
1651 ret = make_branch(name, 0);
ee2499fe 1652 set_merge(ret);
cf818348
DB
1653 return ret;
1654}
1655
1656int branch_has_merge_config(struct branch *branch)
1657{
1658 return branch && !!branch->merge;
1659}
1660
85682c19
SP
1661int branch_merge_matches(struct branch *branch,
1662 int i,
1663 const char *refname)
cf818348 1664{
85682c19 1665 if (!branch || i < 0 || i >= branch->merge_nr)
cf818348 1666 return 0;
54457fe5 1667 return refname_match(branch->merge[i]->src, refname);
cf818348 1668}
d71ab174 1669
3a429d0a
JK
1670__attribute((format (printf,2,3)))
1671static const char *error_buf(struct strbuf *err, const char *fmt, ...)
1672{
1673 if (err) {
1674 va_list ap;
1675 va_start(ap, fmt);
1676 strbuf_vaddf(err, fmt, ap);
1677 va_end(ap);
1678 }
1679 return NULL;
1680}
1681
1682const char *branch_get_upstream(struct branch *branch, struct strbuf *err)
1683{
1684 if (!branch)
1685 return error_buf(err, _("HEAD does not point to a branch"));
1ca41a19
JK
1686
1687 if (!branch->merge || !branch->merge[0]) {
1688 /*
1689 * no merge config; is it because the user didn't define any,
1690 * or because it is not a real branch, and get_branch
1691 * auto-vivified it?
1692 */
3a429d0a
JK
1693 if (!ref_exists(branch->refname))
1694 return error_buf(err, _("no such branch: '%s'"),
1695 branch->name);
1ca41a19
JK
1696 return error_buf(err,
1697 _("no upstream configured for branch '%s'"),
1698 branch->name);
1699 }
1700
1701 if (!branch->merge[0]->dst)
3a429d0a
JK
1702 return error_buf(err,
1703 _("upstream branch '%s' not stored as a remote-tracking branch"),
1704 branch->merge[0]->src);
3a429d0a 1705
a9f9f8cc
JK
1706 return branch->merge[0]->dst;
1707}
1708
e291c75a
JK
1709static const char *tracking_for_push_dest(struct remote *remote,
1710 const char *refname,
1711 struct strbuf *err)
1712{
1713 char *ret;
1714
1715 ret = apply_refspecs(remote->fetch, remote->fetch_refspec_nr, refname);
1716 if (!ret)
1717 return error_buf(err,
1718 _("push destination '%s' on remote '%s' has no local tracking branch"),
1719 refname, remote->name);
1720 return ret;
1721}
1722
1723static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
1724{
1725 struct remote *remote;
1726
1727 if (!branch)
1728 return error_buf(err, _("HEAD does not point to a branch"));
1729
1730 remote = remote_get(pushremote_for_branch(branch, NULL));
1731 if (!remote)
1732 return error_buf(err,
1733 _("branch '%s' has no remote for pushing"),
1734 branch->name);
1735
1736 if (remote->push_refspec_nr) {
1737 char *dst;
1738 const char *ret;
1739
1740 dst = apply_refspecs(remote->push, remote->push_refspec_nr,
1741 branch->refname);
1742 if (!dst)
1743 return error_buf(err,
1744 _("push refspecs for '%s' do not include '%s'"),
1745 remote->name, branch->name);
1746
1747 ret = tracking_for_push_dest(remote, dst, err);
1748 free(dst);
1749 return ret;
1750 }
1751
1752 if (remote->mirror)
1753 return tracking_for_push_dest(remote, branch->refname, err);
1754
1755 switch (push_default) {
1756 case PUSH_DEFAULT_NOTHING:
1757 return error_buf(err, _("push has no destination (push.default is 'nothing')"));
1758
1759 case PUSH_DEFAULT_MATCHING:
1760 case PUSH_DEFAULT_CURRENT:
1761 return tracking_for_push_dest(remote, branch->refname, err);
1762
1763 case PUSH_DEFAULT_UPSTREAM:
1764 return branch_get_upstream(branch, err);
1765
1766 case PUSH_DEFAULT_UNSPECIFIED:
1767 case PUSH_DEFAULT_SIMPLE:
1768 {
1769 const char *up, *cur;
1770
1771 up = branch_get_upstream(branch, err);
1772 if (!up)
1773 return NULL;
1774 cur = tracking_for_push_dest(remote, branch->refname, err);
1775 if (!cur)
1776 return NULL;
1777 if (strcmp(cur, up))
1778 return error_buf(err,
1779 _("cannot resolve 'simple' push to a single destination"));
1780 return cur;
1781 }
1782 }
1783
1784 die("BUG: unhandled push situation");
1785}
1786
1787const char *branch_get_push(struct branch *branch, struct strbuf *err)
1788{
1789 if (!branch->push_tracking_ref)
1790 branch->push_tracking_ref = branch_get_push_1(branch, err);
1791 return branch->push_tracking_ref;
1792}
1793
f8fb971e
JH
1794static int ignore_symref_update(const char *refname)
1795{
1796 unsigned char sha1[20];
1797 int flag;
1798
7695d118 1799 if (!resolve_ref_unsafe(refname, 0, sha1, &flag))
f8fb971e
JH
1800 return 0; /* non-existing refs are OK */
1801 return (flag & REF_ISSYMREF);
1802}
1803
f166db26
MH
1804/*
1805 * Create and return a list of (struct ref) consisting of copies of
1806 * each remote_ref that matches refspec. refspec must be a pattern.
1807 * Fill in the copies' peer_ref to describe the local tracking refs to
1808 * which they map. Omit any references that would map to an existing
1809 * local symbolic ref.
1810 */
4577370e 1811static struct ref *get_expanded_map(const struct ref *remote_refs,
d71ab174
DB
1812 const struct refspec *refspec)
1813{
4577370e 1814 const struct ref *ref;
d71ab174
DB
1815 struct ref *ret = NULL;
1816 struct ref **tail = &ret;
1817
d71ab174 1818 for (ref = remote_refs; ref; ref = ref->next) {
e31a17f7
MH
1819 char *expn_name = NULL;
1820
d71ab174
DB
1821 if (strchr(ref->name, '^'))
1822 continue; /* a dereference item */
e928213f 1823 if (match_name_with_pattern(refspec->src, ref->name,
f8fb971e
JH
1824 refspec->dst, &expn_name) &&
1825 !ignore_symref_update(expn_name)) {
d71ab174 1826 struct ref *cpy = copy_ref(ref);
d71ab174 1827
e928213f 1828 cpy->peer_ref = alloc_ref(expn_name);
d71ab174
DB
1829 if (refspec->force)
1830 cpy->peer_ref->force = 1;
1831 *tail = cpy;
1832 tail = &cpy->next;
1833 }
e31a17f7 1834 free(expn_name);
d71ab174
DB
1835 }
1836
1837 return ret;
1838}
1839
4577370e 1840static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name)
d71ab174 1841{
4577370e 1842 const struct ref *ref;
d71ab174 1843 for (ref = refs; ref; ref = ref->next) {
54457fe5 1844 if (refname_match(name, ref->name))
d71ab174
DB
1845 return ref;
1846 }
1847 return NULL;
1848}
1849
4577370e 1850struct ref *get_remote_ref(const struct ref *remote_refs, const char *name)
d71ab174 1851{
4577370e 1852 const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name);
d71ab174
DB
1853
1854 if (!ref)
9ad7c5ae 1855 return NULL;
d71ab174
DB
1856
1857 return copy_ref(ref);
1858}
1859
1860static struct ref *get_local_ref(const char *name)
1861{
3eb96997 1862 if (!name || name[0] == '\0')
d71ab174
DB
1863 return NULL;
1864
59556548 1865 if (starts_with(name, "refs/"))
59c69c0c 1866 return alloc_ref(name);
d71ab174 1867
59556548
CC
1868 if (starts_with(name, "heads/") ||
1869 starts_with(name, "tags/") ||
1870 starts_with(name, "remotes/"))
8009768e 1871 return alloc_ref_with_prefix("refs/", 5, name);
d71ab174 1872
8009768e 1873 return alloc_ref_with_prefix("refs/heads/", 11, name);
d71ab174
DB
1874}
1875
4577370e 1876int get_fetch_map(const struct ref *remote_refs,
d71ab174 1877 const struct refspec *refspec,
9ad7c5ae
JH
1878 struct ref ***tail,
1879 int missing_ok)
d71ab174 1880{
ef00d150 1881 struct ref *ref_map, **rmp;
d71ab174
DB
1882
1883 if (refspec->pattern) {
1884 ref_map = get_expanded_map(remote_refs, refspec);
1885 } else {
9ad7c5ae
JH
1886 const char *name = refspec->src[0] ? refspec->src : "HEAD";
1887
6e7b66ee
JH
1888 if (refspec->exact_sha1) {
1889 ref_map = alloc_ref(name);
1890 get_sha1_hex(name, ref_map->old_sha1);
1891 } else {
1892 ref_map = get_remote_ref(remote_refs, name);
1893 }
9ad7c5ae
JH
1894 if (!missing_ok && !ref_map)
1895 die("Couldn't find remote ref %s", name);
1896 if (ref_map) {
1897 ref_map->peer_ref = get_local_ref(refspec->dst);
1898 if (ref_map->peer_ref && refspec->force)
1899 ref_map->peer_ref->force = 1;
1900 }
d71ab174
DB
1901 }
1902
ef00d150
DB
1903 for (rmp = &ref_map; *rmp; ) {
1904 if ((*rmp)->peer_ref) {
59556548 1905 if (!starts_with((*rmp)->peer_ref->name, "refs/") ||
5c08c1f2 1906 check_refname_format((*rmp)->peer_ref->name, 0)) {
ef00d150
DB
1907 struct ref *ignore = *rmp;
1908 error("* Ignoring funny ref '%s' locally",
1909 (*rmp)->peer_ref->name);
1910 *rmp = (*rmp)->next;
1911 free(ignore->peer_ref);
1912 free(ignore);
1913 continue;
1914 }
1915 }
1916 rmp = &((*rmp)->next);
d71ab174
DB
1917 }
1918
8f70a765
AR
1919 if (ref_map)
1920 tail_link_ref(ref_map, tail);
d71ab174
DB
1921
1922 return 0;
1923}
be885d96
DB
1924
1925int resolve_remote_symref(struct ref *ref, struct ref *list)
1926{
1927 if (!ref->symref)
1928 return 0;
1929 for (; list; list = list->next)
1930 if (!strcmp(ref->symref, list->name)) {
1931 hashcpy(ref->old_sha1, list->old_sha1);
1932 return 0;
1933 }
1934 return 1;
1935}
6d21bf96 1936
ec8452d5
JS
1937static void unmark_and_free(struct commit_list *list, unsigned int mark)
1938{
1939 while (list) {
1940 struct commit_list *temp = list;
1941 temp->item->object.flags &= ~mark;
1942 list = temp->next;
1943 free(temp);
1944 }
1945}
1946
1947int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1)
1948{
1949 struct object *o;
1950 struct commit *old, *new;
1951 struct commit_list *list, *used;
1952 int found = 0;
1953
75e5c0dc
JH
1954 /*
1955 * Both new and old must be commit-ish and new is descendant of
ec8452d5
JS
1956 * old. Otherwise we require --force.
1957 */
1958 o = deref_tag(parse_object(old_sha1), NULL, 0);
1959 if (!o || o->type != OBJ_COMMIT)
1960 return 0;
1961 old = (struct commit *) o;
1962
1963 o = deref_tag(parse_object(new_sha1), NULL, 0);
1964 if (!o || o->type != OBJ_COMMIT)
1965 return 0;
1966 new = (struct commit *) o;
1967
1968 if (parse_commit(new) < 0)
1969 return 0;
1970
1971 used = list = NULL;
1972 commit_list_insert(new, &list);
1973 while (list) {
1974 new = pop_most_recent_commit(&list, TMP_MARK);
1975 commit_list_insert(new, &used);
1976 if (new == old) {
1977 found = 1;
1978 break;
1979 }
1980 }
1981 unmark_and_free(list, TMP_MARK);
1982 unmark_and_free(used, TMP_MARK);
1983 return found;
1984}
1985
6d21bf96 1986/*
f2e08739 1987 * Compare a branch with its upstream, and save their differences (number
979cb245
JK
1988 * of commits) in *num_ours and *num_theirs. The name of the upstream branch
1989 * (or NULL if no upstream is defined) is returned via *upstream_name, if it
1990 * is not itself NULL.
f2e08739 1991 *
979cb245
JK
1992 * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
1993 * upstream defined, or ref does not exist), 0 otherwise.
6d21bf96 1994 */
979cb245
JK
1995int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
1996 const char **upstream_name)
6d21bf96
JH
1997{
1998 unsigned char sha1[20];
1999 struct commit *ours, *theirs;
2000 char symmetric[84];
2001 struct rev_info revs;
2002 const char *rev_argv[10], *base;
2003 int rev_argc;
2004
f2e08739 2005 /* Cannot stat unless we are marked to build on top of somebody else. */
3a429d0a 2006 base = branch_get_upstream(branch, NULL);
979cb245
JK
2007 if (upstream_name)
2008 *upstream_name = base;
a9f9f8cc 2009 if (!base)
979cb245 2010 return -1;
6d21bf96 2011
f2e08739 2012 /* Cannot stat if what we used to build on no longer exists */
c6893323 2013 if (read_ref(base, sha1))
f2e08739 2014 return -1;
57ffc5f8 2015 theirs = lookup_commit_reference(sha1);
6d21bf96 2016 if (!theirs)
f2e08739 2017 return -1;
6d21bf96 2018
c6893323 2019 if (read_ref(branch->refname, sha1))
f2e08739 2020 return -1;
57ffc5f8 2021 ours = lookup_commit_reference(sha1);
6d21bf96 2022 if (!ours)
f2e08739 2023 return -1;
6d21bf96
JH
2024
2025 /* are we the same? */
f2e08739
JX
2026 if (theirs == ours) {
2027 *num_theirs = *num_ours = 0;
979cb245 2028 return 0;
f2e08739 2029 }
6d21bf96 2030
8fbf879e 2031 /* Run "rev-list --left-right ours...theirs" internally... */
6d21bf96
JH
2032 rev_argc = 0;
2033 rev_argv[rev_argc++] = NULL;
2034 rev_argv[rev_argc++] = "--left-right";
2035 rev_argv[rev_argc++] = symmetric;
2036 rev_argv[rev_argc++] = "--";
2037 rev_argv[rev_argc] = NULL;
2038
2039 strcpy(symmetric, sha1_to_hex(ours->object.sha1));
2040 strcpy(symmetric + 40, "...");
2041 strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1));
2042
2043 init_revisions(&revs, NULL);
2044 setup_revisions(rev_argc, rev_argv, &revs, NULL);
81c3ce3c
SB
2045 if (prepare_revision_walk(&revs))
2046 die("revision walk setup failed");
6d21bf96
JH
2047
2048 /* ... and count the commits on each side. */
2049 *num_ours = 0;
2050 *num_theirs = 0;
2051 while (1) {
2052 struct commit *c = get_revision(&revs);
2053 if (!c)
2054 break;
2055 if (c->object.flags & SYMMETRIC_LEFT)
2056 (*num_ours)++;
2057 else
2058 (*num_theirs)++;
2059 }
c0234b2e
JH
2060
2061 /* clear object flags smudged by the above traversal */
2062 clear_commit_marks(ours, ALL_REV_FLAGS);
2063 clear_commit_marks(theirs, ALL_REV_FLAGS);
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);
455ade65 2146 hashcpy(ref->new_sha1, oid->hash);
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");
2183 if (r && !hashcmp(r->old_sha1, head->old_sha1))
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/") &&
61adfd30 2191 !hashcmp(r->old_sha1, head->old_sha1)) {
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);
455ade65 2239 hashcpy(ref->new_sha1, oid->hash);
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}
91048a95
JH
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,
2334 unsigned char sha1[20])
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 */
2341 if (read_ref(dst, sha1))
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))
91048a95
JH
2356 continue;
2357 ref->expect_old_sha1 = 1;
2358 if (!entry->use_tracking)
2359 hashcpy(ref->old_sha1_expect, cas->entry[i].expect);
2360 else if (remote_tracking(remote, ref->name, ref->old_sha1_expect))
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;
2370 if (remote_tracking(remote, ref->name, ref->old_sha1_expect))
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}