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1 | #include "cache.h" | |
2 | #include "remote.h" | |
3 | #include "refs.h" | |
4 | #include "commit.h" | |
5 | #include "diff.h" | |
6 | #include "revision.h" | |
7 | #include "dir.h" | |
8 | #include "tag.h" | |
9 | #include "string-list.h" | |
10 | #include "mergesort.h" | |
11 | ||
12 | enum map_direction { FROM_SRC, FROM_DST }; | |
13 | ||
14 | static struct refspec s_tag_refspec = { | |
15 | 0, | |
16 | 1, | |
17 | 0, | |
18 | 0, | |
19 | "refs/tags/*", | |
20 | "refs/tags/*" | |
21 | }; | |
22 | ||
23 | const struct refspec *tag_refspec = &s_tag_refspec; | |
24 | ||
25 | struct counted_string { | |
26 | size_t len; | |
27 | const char *s; | |
28 | }; | |
29 | struct rewrite { | |
30 | const char *base; | |
31 | size_t baselen; | |
32 | struct counted_string *instead_of; | |
33 | int instead_of_nr; | |
34 | int instead_of_alloc; | |
35 | }; | |
36 | struct rewrites { | |
37 | struct rewrite **rewrite; | |
38 | int rewrite_alloc; | |
39 | int rewrite_nr; | |
40 | }; | |
41 | ||
42 | static struct remote **remotes; | |
43 | static int remotes_alloc; | |
44 | static int remotes_nr; | |
45 | ||
46 | static struct branch **branches; | |
47 | static int branches_alloc; | |
48 | static int branches_nr; | |
49 | ||
50 | static struct branch *current_branch; | |
51 | static const char *default_remote_name; | |
52 | static int explicit_default_remote_name; | |
53 | ||
54 | static struct rewrites rewrites; | |
55 | static struct rewrites rewrites_push; | |
56 | ||
57 | #define BUF_SIZE (2048) | |
58 | static char buffer[BUF_SIZE]; | |
59 | ||
60 | static int valid_remote(const struct remote *remote) | |
61 | { | |
62 | return (!!remote->url) || (!!remote->foreign_vcs); | |
63 | } | |
64 | ||
65 | static const char *alias_url(const char *url, struct rewrites *r) | |
66 | { | |
67 | int i, j; | |
68 | char *ret; | |
69 | struct counted_string *longest; | |
70 | int longest_i; | |
71 | ||
72 | longest = NULL; | |
73 | longest_i = -1; | |
74 | for (i = 0; i < r->rewrite_nr; i++) { | |
75 | if (!r->rewrite[i]) | |
76 | continue; | |
77 | for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) { | |
78 | if (!prefixcmp(url, r->rewrite[i]->instead_of[j].s) && | |
79 | (!longest || | |
80 | longest->len < r->rewrite[i]->instead_of[j].len)) { | |
81 | longest = &(r->rewrite[i]->instead_of[j]); | |
82 | longest_i = i; | |
83 | } | |
84 | } | |
85 | } | |
86 | if (!longest) | |
87 | return url; | |
88 | ||
89 | ret = xmalloc(r->rewrite[longest_i]->baselen + | |
90 | (strlen(url) - longest->len) + 1); | |
91 | strcpy(ret, r->rewrite[longest_i]->base); | |
92 | strcpy(ret + r->rewrite[longest_i]->baselen, url + longest->len); | |
93 | return ret; | |
94 | } | |
95 | ||
96 | static void add_push_refspec(struct remote *remote, const char *ref) | |
97 | { | |
98 | ALLOC_GROW(remote->push_refspec, | |
99 | remote->push_refspec_nr + 1, | |
100 | remote->push_refspec_alloc); | |
101 | remote->push_refspec[remote->push_refspec_nr++] = ref; | |
102 | } | |
103 | ||
104 | static void add_fetch_refspec(struct remote *remote, const char *ref) | |
105 | { | |
106 | ALLOC_GROW(remote->fetch_refspec, | |
107 | remote->fetch_refspec_nr + 1, | |
108 | remote->fetch_refspec_alloc); | |
109 | remote->fetch_refspec[remote->fetch_refspec_nr++] = ref; | |
110 | } | |
111 | ||
112 | static void add_url(struct remote *remote, const char *url) | |
113 | { | |
114 | ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc); | |
115 | remote->url[remote->url_nr++] = url; | |
116 | } | |
117 | ||
118 | static void add_pushurl(struct remote *remote, const char *pushurl) | |
119 | { | |
120 | ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc); | |
121 | remote->pushurl[remote->pushurl_nr++] = pushurl; | |
122 | } | |
123 | ||
124 | static void add_pushurl_alias(struct remote *remote, const char *url) | |
125 | { | |
126 | const char *pushurl = alias_url(url, &rewrites_push); | |
127 | if (pushurl != url) | |
128 | add_pushurl(remote, pushurl); | |
129 | } | |
130 | ||
131 | static void add_url_alias(struct remote *remote, const char *url) | |
132 | { | |
133 | add_url(remote, alias_url(url, &rewrites)); | |
134 | add_pushurl_alias(remote, url); | |
135 | } | |
136 | ||
137 | static struct remote *make_remote(const char *name, int len) | |
138 | { | |
139 | struct remote *ret; | |
140 | int i; | |
141 | ||
142 | for (i = 0; i < remotes_nr; i++) { | |
143 | if (len ? (!strncmp(name, remotes[i]->name, len) && | |
144 | !remotes[i]->name[len]) : | |
145 | !strcmp(name, remotes[i]->name)) | |
146 | return remotes[i]; | |
147 | } | |
148 | ||
149 | ret = xcalloc(1, sizeof(struct remote)); | |
150 | ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc); | |
151 | remotes[remotes_nr++] = ret; | |
152 | if (len) | |
153 | ret->name = xstrndup(name, len); | |
154 | else | |
155 | ret->name = xstrdup(name); | |
156 | return ret; | |
157 | } | |
158 | ||
159 | static void add_merge(struct branch *branch, const char *name) | |
160 | { | |
161 | ALLOC_GROW(branch->merge_name, branch->merge_nr + 1, | |
162 | branch->merge_alloc); | |
163 | branch->merge_name[branch->merge_nr++] = name; | |
164 | } | |
165 | ||
166 | static struct branch *make_branch(const char *name, int len) | |
167 | { | |
168 | struct branch *ret; | |
169 | int i; | |
170 | char *refname; | |
171 | ||
172 | for (i = 0; i < branches_nr; i++) { | |
173 | if (len ? (!strncmp(name, branches[i]->name, len) && | |
174 | !branches[i]->name[len]) : | |
175 | !strcmp(name, branches[i]->name)) | |
176 | return branches[i]; | |
177 | } | |
178 | ||
179 | ALLOC_GROW(branches, branches_nr + 1, branches_alloc); | |
180 | ret = xcalloc(1, sizeof(struct branch)); | |
181 | branches[branches_nr++] = ret; | |
182 | if (len) | |
183 | ret->name = xstrndup(name, len); | |
184 | else | |
185 | ret->name = xstrdup(name); | |
186 | refname = xmalloc(strlen(name) + strlen("refs/heads/") + 1); | |
187 | strcpy(refname, "refs/heads/"); | |
188 | strcpy(refname + strlen("refs/heads/"), ret->name); | |
189 | ret->refname = refname; | |
190 | ||
191 | return ret; | |
192 | } | |
193 | ||
194 | static struct rewrite *make_rewrite(struct rewrites *r, const char *base, int len) | |
195 | { | |
196 | struct rewrite *ret; | |
197 | int i; | |
198 | ||
199 | for (i = 0; i < r->rewrite_nr; i++) { | |
200 | if (len | |
201 | ? (len == r->rewrite[i]->baselen && | |
202 | !strncmp(base, r->rewrite[i]->base, len)) | |
203 | : !strcmp(base, r->rewrite[i]->base)) | |
204 | return r->rewrite[i]; | |
205 | } | |
206 | ||
207 | ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc); | |
208 | ret = xcalloc(1, sizeof(struct rewrite)); | |
209 | r->rewrite[r->rewrite_nr++] = ret; | |
210 | if (len) { | |
211 | ret->base = xstrndup(base, len); | |
212 | ret->baselen = len; | |
213 | } | |
214 | else { | |
215 | ret->base = xstrdup(base); | |
216 | ret->baselen = strlen(base); | |
217 | } | |
218 | return ret; | |
219 | } | |
220 | ||
221 | static void add_instead_of(struct rewrite *rewrite, const char *instead_of) | |
222 | { | |
223 | ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc); | |
224 | rewrite->instead_of[rewrite->instead_of_nr].s = instead_of; | |
225 | rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of); | |
226 | rewrite->instead_of_nr++; | |
227 | } | |
228 | ||
229 | static void read_remotes_file(struct remote *remote) | |
230 | { | |
231 | FILE *f = fopen(git_path("remotes/%s", remote->name), "r"); | |
232 | ||
233 | if (!f) | |
234 | return; | |
235 | remote->origin = REMOTE_REMOTES; | |
236 | while (fgets(buffer, BUF_SIZE, f)) { | |
237 | int value_list; | |
238 | char *s, *p; | |
239 | ||
240 | if (!prefixcmp(buffer, "URL:")) { | |
241 | value_list = 0; | |
242 | s = buffer + 4; | |
243 | } else if (!prefixcmp(buffer, "Push:")) { | |
244 | value_list = 1; | |
245 | s = buffer + 5; | |
246 | } else if (!prefixcmp(buffer, "Pull:")) { | |
247 | value_list = 2; | |
248 | s = buffer + 5; | |
249 | } else | |
250 | continue; | |
251 | ||
252 | while (isspace(*s)) | |
253 | s++; | |
254 | if (!*s) | |
255 | continue; | |
256 | ||
257 | p = s + strlen(s); | |
258 | while (isspace(p[-1])) | |
259 | *--p = 0; | |
260 | ||
261 | switch (value_list) { | |
262 | case 0: | |
263 | add_url_alias(remote, xstrdup(s)); | |
264 | break; | |
265 | case 1: | |
266 | add_push_refspec(remote, xstrdup(s)); | |
267 | break; | |
268 | case 2: | |
269 | add_fetch_refspec(remote, xstrdup(s)); | |
270 | break; | |
271 | } | |
272 | } | |
273 | fclose(f); | |
274 | } | |
275 | ||
276 | static void read_branches_file(struct remote *remote) | |
277 | { | |
278 | const char *slash = strchr(remote->name, '/'); | |
279 | char *frag; | |
280 | struct strbuf branch = STRBUF_INIT; | |
281 | int n = slash ? slash - remote->name : 1000; | |
282 | FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r"); | |
283 | char *s, *p; | |
284 | int len; | |
285 | ||
286 | if (!f) | |
287 | return; | |
288 | s = fgets(buffer, BUF_SIZE, f); | |
289 | fclose(f); | |
290 | if (!s) | |
291 | return; | |
292 | while (isspace(*s)) | |
293 | s++; | |
294 | if (!*s) | |
295 | return; | |
296 | remote->origin = REMOTE_BRANCHES; | |
297 | p = s + strlen(s); | |
298 | while (isspace(p[-1])) | |
299 | *--p = 0; | |
300 | len = p - s; | |
301 | if (slash) | |
302 | len += strlen(slash); | |
303 | p = xmalloc(len + 1); | |
304 | strcpy(p, s); | |
305 | if (slash) | |
306 | strcat(p, slash); | |
307 | ||
308 | /* | |
309 | * With "slash", e.g. "git fetch jgarzik/netdev-2.6" when | |
310 | * reading from $GIT_DIR/branches/jgarzik fetches "HEAD" from | |
311 | * the partial URL obtained from the branches file plus | |
312 | * "/netdev-2.6" and does not store it in any tracking ref. | |
313 | * #branch specifier in the file is ignored. | |
314 | * | |
315 | * Otherwise, the branches file would have URL and optionally | |
316 | * #branch specified. The "master" (or specified) branch is | |
317 | * fetched and stored in the local branch of the same name. | |
318 | */ | |
319 | frag = strchr(p, '#'); | |
320 | if (frag) { | |
321 | *(frag++) = '\0'; | |
322 | strbuf_addf(&branch, "refs/heads/%s", frag); | |
323 | } else | |
324 | strbuf_addstr(&branch, "refs/heads/master"); | |
325 | if (!slash) { | |
326 | strbuf_addf(&branch, ":refs/heads/%s", remote->name); | |
327 | } else { | |
328 | strbuf_reset(&branch); | |
329 | strbuf_addstr(&branch, "HEAD:"); | |
330 | } | |
331 | add_url_alias(remote, p); | |
332 | add_fetch_refspec(remote, strbuf_detach(&branch, NULL)); | |
333 | /* | |
334 | * Cogito compatible push: push current HEAD to remote #branch | |
335 | * (master if missing) | |
336 | */ | |
337 | strbuf_init(&branch, 0); | |
338 | strbuf_addstr(&branch, "HEAD"); | |
339 | if (frag) | |
340 | strbuf_addf(&branch, ":refs/heads/%s", frag); | |
341 | else | |
342 | strbuf_addstr(&branch, ":refs/heads/master"); | |
343 | add_push_refspec(remote, strbuf_detach(&branch, NULL)); | |
344 | remote->fetch_tags = 1; /* always auto-follow */ | |
345 | } | |
346 | ||
347 | static int handle_config(const char *key, const char *value, void *cb) | |
348 | { | |
349 | const char *name; | |
350 | const char *subkey; | |
351 | struct remote *remote; | |
352 | struct branch *branch; | |
353 | if (!prefixcmp(key, "branch.")) { | |
354 | name = key + 7; | |
355 | subkey = strrchr(name, '.'); | |
356 | if (!subkey) | |
357 | return 0; | |
358 | branch = make_branch(name, subkey - name); | |
359 | if (!strcmp(subkey, ".remote")) { | |
360 | if (git_config_string(&branch->remote_name, key, value)) | |
361 | return -1; | |
362 | if (branch == current_branch) { | |
363 | default_remote_name = branch->remote_name; | |
364 | explicit_default_remote_name = 1; | |
365 | } | |
366 | } else if (!strcmp(subkey, ".merge")) { | |
367 | if (!value) | |
368 | return config_error_nonbool(key); | |
369 | add_merge(branch, xstrdup(value)); | |
370 | } | |
371 | return 0; | |
372 | } | |
373 | if (!prefixcmp(key, "url.")) { | |
374 | struct rewrite *rewrite; | |
375 | name = key + 4; | |
376 | subkey = strrchr(name, '.'); | |
377 | if (!subkey) | |
378 | return 0; | |
379 | if (!strcmp(subkey, ".insteadof")) { | |
380 | rewrite = make_rewrite(&rewrites, name, subkey - name); | |
381 | if (!value) | |
382 | return config_error_nonbool(key); | |
383 | add_instead_of(rewrite, xstrdup(value)); | |
384 | } else if (!strcmp(subkey, ".pushinsteadof")) { | |
385 | rewrite = make_rewrite(&rewrites_push, name, subkey - name); | |
386 | if (!value) | |
387 | return config_error_nonbool(key); | |
388 | add_instead_of(rewrite, xstrdup(value)); | |
389 | } | |
390 | } | |
391 | if (prefixcmp(key, "remote.")) | |
392 | return 0; | |
393 | name = key + 7; | |
394 | if (*name == '/') { | |
395 | warning("Config remote shorthand cannot begin with '/': %s", | |
396 | name); | |
397 | return 0; | |
398 | } | |
399 | subkey = strrchr(name, '.'); | |
400 | if (!subkey) | |
401 | return 0; | |
402 | remote = make_remote(name, subkey - name); | |
403 | remote->origin = REMOTE_CONFIG; | |
404 | if (!strcmp(subkey, ".mirror")) | |
405 | remote->mirror = git_config_bool(key, value); | |
406 | else if (!strcmp(subkey, ".skipdefaultupdate")) | |
407 | remote->skip_default_update = git_config_bool(key, value); | |
408 | else if (!strcmp(subkey, ".skipfetchall")) | |
409 | remote->skip_default_update = git_config_bool(key, value); | |
410 | else if (!strcmp(subkey, ".url")) { | |
411 | const char *v; | |
412 | if (git_config_string(&v, key, value)) | |
413 | return -1; | |
414 | add_url(remote, v); | |
415 | } else if (!strcmp(subkey, ".pushurl")) { | |
416 | const char *v; | |
417 | if (git_config_string(&v, key, value)) | |
418 | return -1; | |
419 | add_pushurl(remote, v); | |
420 | } else if (!strcmp(subkey, ".push")) { | |
421 | const char *v; | |
422 | if (git_config_string(&v, key, value)) | |
423 | return -1; | |
424 | add_push_refspec(remote, v); | |
425 | } else if (!strcmp(subkey, ".fetch")) { | |
426 | const char *v; | |
427 | if (git_config_string(&v, key, value)) | |
428 | return -1; | |
429 | add_fetch_refspec(remote, v); | |
430 | } else if (!strcmp(subkey, ".receivepack")) { | |
431 | const char *v; | |
432 | if (git_config_string(&v, key, value)) | |
433 | return -1; | |
434 | if (!remote->receivepack) | |
435 | remote->receivepack = v; | |
436 | else | |
437 | error("more than one receivepack given, using the first"); | |
438 | } else if (!strcmp(subkey, ".uploadpack")) { | |
439 | const char *v; | |
440 | if (git_config_string(&v, key, value)) | |
441 | return -1; | |
442 | if (!remote->uploadpack) | |
443 | remote->uploadpack = v; | |
444 | else | |
445 | error("more than one uploadpack given, using the first"); | |
446 | } else if (!strcmp(subkey, ".tagopt")) { | |
447 | if (!strcmp(value, "--no-tags")) | |
448 | remote->fetch_tags = -1; | |
449 | else if (!strcmp(value, "--tags")) | |
450 | remote->fetch_tags = 2; | |
451 | } else if (!strcmp(subkey, ".proxy")) { | |
452 | return git_config_string((const char **)&remote->http_proxy, | |
453 | key, value); | |
454 | } else if (!strcmp(subkey, ".vcs")) { | |
455 | return git_config_string(&remote->foreign_vcs, key, value); | |
456 | } | |
457 | return 0; | |
458 | } | |
459 | ||
460 | static void alias_all_urls(void) | |
461 | { | |
462 | int i, j; | |
463 | for (i = 0; i < remotes_nr; i++) { | |
464 | int add_pushurl_aliases; | |
465 | if (!remotes[i]) | |
466 | continue; | |
467 | for (j = 0; j < remotes[i]->pushurl_nr; j++) { | |
468 | remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites); | |
469 | } | |
470 | add_pushurl_aliases = remotes[i]->pushurl_nr == 0; | |
471 | for (j = 0; j < remotes[i]->url_nr; j++) { | |
472 | if (add_pushurl_aliases) | |
473 | add_pushurl_alias(remotes[i], remotes[i]->url[j]); | |
474 | remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites); | |
475 | } | |
476 | } | |
477 | } | |
478 | ||
479 | static void read_config(void) | |
480 | { | |
481 | unsigned char sha1[20]; | |
482 | const char *head_ref; | |
483 | int flag; | |
484 | if (default_remote_name) /* did this already */ | |
485 | return; | |
486 | default_remote_name = xstrdup("origin"); | |
487 | current_branch = NULL; | |
488 | head_ref = resolve_ref_unsafe("HEAD", sha1, 0, &flag); | |
489 | if (head_ref && (flag & REF_ISSYMREF) && | |
490 | !prefixcmp(head_ref, "refs/heads/")) { | |
491 | current_branch = | |
492 | make_branch(head_ref + strlen("refs/heads/"), 0); | |
493 | } | |
494 | git_config(handle_config, NULL); | |
495 | alias_all_urls(); | |
496 | } | |
497 | ||
498 | /* | |
499 | * This function frees a refspec array. | |
500 | * Warning: code paths should be checked to ensure that the src | |
501 | * and dst pointers are always freeable pointers as well | |
502 | * as the refspec pointer itself. | |
503 | */ | |
504 | static void free_refspecs(struct refspec *refspec, int nr_refspec) | |
505 | { | |
506 | int i; | |
507 | ||
508 | if (!refspec) | |
509 | return; | |
510 | ||
511 | for (i = 0; i < nr_refspec; i++) { | |
512 | free(refspec[i].src); | |
513 | free(refspec[i].dst); | |
514 | } | |
515 | free(refspec); | |
516 | } | |
517 | ||
518 | static struct refspec *parse_refspec_internal(int nr_refspec, const char **refspec, int fetch, int verify) | |
519 | { | |
520 | int i; | |
521 | struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec); | |
522 | ||
523 | for (i = 0; i < nr_refspec; i++) { | |
524 | size_t llen; | |
525 | int is_glob; | |
526 | const char *lhs, *rhs; | |
527 | int flags; | |
528 | ||
529 | is_glob = 0; | |
530 | ||
531 | lhs = refspec[i]; | |
532 | if (*lhs == '+') { | |
533 | rs[i].force = 1; | |
534 | lhs++; | |
535 | } | |
536 | ||
537 | rhs = strrchr(lhs, ':'); | |
538 | ||
539 | /* | |
540 | * Before going on, special case ":" (or "+:") as a refspec | |
541 | * for pushing matching refs. | |
542 | */ | |
543 | if (!fetch && rhs == lhs && rhs[1] == '\0') { | |
544 | rs[i].matching = 1; | |
545 | continue; | |
546 | } | |
547 | ||
548 | if (rhs) { | |
549 | size_t rlen = strlen(++rhs); | |
550 | is_glob = (1 <= rlen && strchr(rhs, '*')); | |
551 | rs[i].dst = xstrndup(rhs, rlen); | |
552 | } | |
553 | ||
554 | llen = (rhs ? (rhs - lhs - 1) : strlen(lhs)); | |
555 | if (1 <= llen && memchr(lhs, '*', llen)) { | |
556 | if ((rhs && !is_glob) || (!rhs && fetch)) | |
557 | goto invalid; | |
558 | is_glob = 1; | |
559 | } else if (rhs && is_glob) { | |
560 | goto invalid; | |
561 | } | |
562 | ||
563 | rs[i].pattern = is_glob; | |
564 | rs[i].src = xstrndup(lhs, llen); | |
565 | flags = REFNAME_ALLOW_ONELEVEL | (is_glob ? REFNAME_REFSPEC_PATTERN : 0); | |
566 | ||
567 | if (fetch) { | |
568 | unsigned char unused[40]; | |
569 | ||
570 | /* LHS */ | |
571 | if (!*rs[i].src) | |
572 | ; /* empty is ok; it means "HEAD" */ | |
573 | else if (llen == 40 && !get_sha1_hex(rs[i].src, unused)) | |
574 | rs[i].exact_sha1 = 1; /* ok */ | |
575 | else if (!check_refname_format(rs[i].src, flags)) | |
576 | ; /* valid looking ref is ok */ | |
577 | else | |
578 | goto invalid; | |
579 | /* RHS */ | |
580 | if (!rs[i].dst) | |
581 | ; /* missing is ok; it is the same as empty */ | |
582 | else if (!*rs[i].dst) | |
583 | ; /* empty is ok; it means "do not store" */ | |
584 | else if (!check_refname_format(rs[i].dst, flags)) | |
585 | ; /* valid looking ref is ok */ | |
586 | else | |
587 | goto invalid; | |
588 | } else { | |
589 | /* | |
590 | * LHS | |
591 | * - empty is allowed; it means delete. | |
592 | * - when wildcarded, it must be a valid looking ref. | |
593 | * - otherwise, it must be an extended SHA-1, but | |
594 | * there is no existing way to validate this. | |
595 | */ | |
596 | if (!*rs[i].src) | |
597 | ; /* empty is ok */ | |
598 | else if (is_glob) { | |
599 | if (check_refname_format(rs[i].src, flags)) | |
600 | goto invalid; | |
601 | } | |
602 | else | |
603 | ; /* anything goes, for now */ | |
604 | /* | |
605 | * RHS | |
606 | * - missing is allowed, but LHS then must be a | |
607 | * valid looking ref. | |
608 | * - empty is not allowed. | |
609 | * - otherwise it must be a valid looking ref. | |
610 | */ | |
611 | if (!rs[i].dst) { | |
612 | if (check_refname_format(rs[i].src, flags)) | |
613 | goto invalid; | |
614 | } else if (!*rs[i].dst) { | |
615 | goto invalid; | |
616 | } else { | |
617 | if (check_refname_format(rs[i].dst, flags)) | |
618 | goto invalid; | |
619 | } | |
620 | } | |
621 | } | |
622 | return rs; | |
623 | ||
624 | invalid: | |
625 | if (verify) { | |
626 | /* | |
627 | * nr_refspec must be greater than zero and i must be valid | |
628 | * since it is only possible to reach this point from within | |
629 | * the for loop above. | |
630 | */ | |
631 | free_refspecs(rs, i+1); | |
632 | return NULL; | |
633 | } | |
634 | die("Invalid refspec '%s'", refspec[i]); | |
635 | } | |
636 | ||
637 | int valid_fetch_refspec(const char *fetch_refspec_str) | |
638 | { | |
639 | struct refspec *refspec; | |
640 | ||
641 | refspec = parse_refspec_internal(1, &fetch_refspec_str, 1, 1); | |
642 | free_refspecs(refspec, 1); | |
643 | return !!refspec; | |
644 | } | |
645 | ||
646 | struct refspec *parse_fetch_refspec(int nr_refspec, const char **refspec) | |
647 | { | |
648 | return parse_refspec_internal(nr_refspec, refspec, 1, 0); | |
649 | } | |
650 | ||
651 | static struct refspec *parse_push_refspec(int nr_refspec, const char **refspec) | |
652 | { | |
653 | return parse_refspec_internal(nr_refspec, refspec, 0, 0); | |
654 | } | |
655 | ||
656 | void free_refspec(int nr_refspec, struct refspec *refspec) | |
657 | { | |
658 | int i; | |
659 | for (i = 0; i < nr_refspec; i++) { | |
660 | free(refspec[i].src); | |
661 | free(refspec[i].dst); | |
662 | } | |
663 | free(refspec); | |
664 | } | |
665 | ||
666 | static int valid_remote_nick(const char *name) | |
667 | { | |
668 | if (!name[0] || is_dot_or_dotdot(name)) | |
669 | return 0; | |
670 | return !strchr(name, '/'); /* no slash */ | |
671 | } | |
672 | ||
673 | struct remote *remote_get(const char *name) | |
674 | { | |
675 | struct remote *ret; | |
676 | int name_given = 0; | |
677 | ||
678 | read_config(); | |
679 | if (name) | |
680 | name_given = 1; | |
681 | else { | |
682 | name = default_remote_name; | |
683 | name_given = explicit_default_remote_name; | |
684 | } | |
685 | ||
686 | ret = make_remote(name, 0); | |
687 | if (valid_remote_nick(name)) { | |
688 | if (!valid_remote(ret)) | |
689 | read_remotes_file(ret); | |
690 | if (!valid_remote(ret)) | |
691 | read_branches_file(ret); | |
692 | } | |
693 | if (name_given && !valid_remote(ret)) | |
694 | add_url_alias(ret, name); | |
695 | if (!valid_remote(ret)) | |
696 | return NULL; | |
697 | ret->fetch = parse_fetch_refspec(ret->fetch_refspec_nr, ret->fetch_refspec); | |
698 | ret->push = parse_push_refspec(ret->push_refspec_nr, ret->push_refspec); | |
699 | return ret; | |
700 | } | |
701 | ||
702 | int remote_is_configured(const char *name) | |
703 | { | |
704 | int i; | |
705 | read_config(); | |
706 | ||
707 | for (i = 0; i < remotes_nr; i++) | |
708 | if (!strcmp(name, remotes[i]->name)) | |
709 | return 1; | |
710 | return 0; | |
711 | } | |
712 | ||
713 | int for_each_remote(each_remote_fn fn, void *priv) | |
714 | { | |
715 | int i, result = 0; | |
716 | read_config(); | |
717 | for (i = 0; i < remotes_nr && !result; i++) { | |
718 | struct remote *r = remotes[i]; | |
719 | if (!r) | |
720 | continue; | |
721 | if (!r->fetch) | |
722 | r->fetch = parse_fetch_refspec(r->fetch_refspec_nr, | |
723 | r->fetch_refspec); | |
724 | if (!r->push) | |
725 | r->push = parse_push_refspec(r->push_refspec_nr, | |
726 | r->push_refspec); | |
727 | result = fn(r, priv); | |
728 | } | |
729 | return result; | |
730 | } | |
731 | ||
732 | void ref_remove_duplicates(struct ref *ref_map) | |
733 | { | |
734 | struct string_list refs = STRING_LIST_INIT_NODUP; | |
735 | struct string_list_item *item = NULL; | |
736 | struct ref *prev = NULL, *next = NULL; | |
737 | for (; ref_map; prev = ref_map, ref_map = next) { | |
738 | next = ref_map->next; | |
739 | if (!ref_map->peer_ref) | |
740 | continue; | |
741 | ||
742 | item = string_list_lookup(&refs, ref_map->peer_ref->name); | |
743 | if (item) { | |
744 | if (strcmp(((struct ref *)item->util)->name, | |
745 | ref_map->name)) | |
746 | die("%s tracks both %s and %s", | |
747 | ref_map->peer_ref->name, | |
748 | ((struct ref *)item->util)->name, | |
749 | ref_map->name); | |
750 | prev->next = ref_map->next; | |
751 | free(ref_map->peer_ref); | |
752 | free(ref_map); | |
753 | ref_map = prev; /* skip this; we freed it */ | |
754 | continue; | |
755 | } | |
756 | ||
757 | item = string_list_insert(&refs, ref_map->peer_ref->name); | |
758 | item->util = ref_map; | |
759 | } | |
760 | string_list_clear(&refs, 0); | |
761 | } | |
762 | ||
763 | int remote_has_url(struct remote *remote, const char *url) | |
764 | { | |
765 | int i; | |
766 | for (i = 0; i < remote->url_nr; i++) { | |
767 | if (!strcmp(remote->url[i], url)) | |
768 | return 1; | |
769 | } | |
770 | return 0; | |
771 | } | |
772 | ||
773 | static int match_name_with_pattern(const char *key, const char *name, | |
774 | const char *value, char **result) | |
775 | { | |
776 | const char *kstar = strchr(key, '*'); | |
777 | size_t klen; | |
778 | size_t ksuffixlen; | |
779 | size_t namelen; | |
780 | int ret; | |
781 | if (!kstar) | |
782 | die("Key '%s' of pattern had no '*'", key); | |
783 | klen = kstar - key; | |
784 | ksuffixlen = strlen(kstar + 1); | |
785 | namelen = strlen(name); | |
786 | ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen && | |
787 | !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen); | |
788 | if (ret && value) { | |
789 | const char *vstar = strchr(value, '*'); | |
790 | size_t vlen; | |
791 | size_t vsuffixlen; | |
792 | if (!vstar) | |
793 | die("Value '%s' of pattern has no '*'", value); | |
794 | vlen = vstar - value; | |
795 | vsuffixlen = strlen(vstar + 1); | |
796 | *result = xmalloc(vlen + vsuffixlen + | |
797 | strlen(name) - | |
798 | klen - ksuffixlen + 1); | |
799 | strncpy(*result, value, vlen); | |
800 | strncpy(*result + vlen, | |
801 | name + klen, namelen - klen - ksuffixlen); | |
802 | strcpy(*result + vlen + namelen - klen - ksuffixlen, | |
803 | vstar + 1); | |
804 | } | |
805 | return ret; | |
806 | } | |
807 | ||
808 | static int query_refspecs(struct refspec *refs, int ref_count, struct refspec *query) | |
809 | { | |
810 | int i; | |
811 | int find_src = !query->src; | |
812 | ||
813 | if (find_src && !query->dst) | |
814 | return error("query_refspecs: need either src or dst"); | |
815 | ||
816 | for (i = 0; i < ref_count; i++) { | |
817 | struct refspec *refspec = &refs[i]; | |
818 | const char *key = find_src ? refspec->dst : refspec->src; | |
819 | const char *value = find_src ? refspec->src : refspec->dst; | |
820 | const char *needle = find_src ? query->dst : query->src; | |
821 | char **result = find_src ? &query->src : &query->dst; | |
822 | ||
823 | if (!refspec->dst) | |
824 | continue; | |
825 | if (refspec->pattern) { | |
826 | if (match_name_with_pattern(key, needle, value, result)) { | |
827 | query->force = refspec->force; | |
828 | return 0; | |
829 | } | |
830 | } else if (!strcmp(needle, key)) { | |
831 | *result = xstrdup(value); | |
832 | query->force = refspec->force; | |
833 | return 0; | |
834 | } | |
835 | } | |
836 | return -1; | |
837 | } | |
838 | ||
839 | char *apply_refspecs(struct refspec *refspecs, int nr_refspec, | |
840 | const char *name) | |
841 | { | |
842 | struct refspec query; | |
843 | ||
844 | memset(&query, 0, sizeof(struct refspec)); | |
845 | query.src = (char *)name; | |
846 | ||
847 | if (query_refspecs(refspecs, nr_refspec, &query)) | |
848 | return NULL; | |
849 | ||
850 | return query.dst; | |
851 | } | |
852 | ||
853 | int remote_find_tracking(struct remote *remote, struct refspec *refspec) | |
854 | { | |
855 | return query_refspecs(remote->fetch, remote->fetch_refspec_nr, refspec); | |
856 | } | |
857 | ||
858 | static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen, | |
859 | const char *name) | |
860 | { | |
861 | size_t len = strlen(name); | |
862 | struct ref *ref = xcalloc(1, sizeof(struct ref) + prefixlen + len + 1); | |
863 | memcpy(ref->name, prefix, prefixlen); | |
864 | memcpy(ref->name + prefixlen, name, len); | |
865 | return ref; | |
866 | } | |
867 | ||
868 | struct ref *alloc_ref(const char *name) | |
869 | { | |
870 | return alloc_ref_with_prefix("", 0, name); | |
871 | } | |
872 | ||
873 | struct ref *copy_ref(const struct ref *ref) | |
874 | { | |
875 | struct ref *cpy; | |
876 | size_t len; | |
877 | if (!ref) | |
878 | return NULL; | |
879 | len = strlen(ref->name); | |
880 | cpy = xmalloc(sizeof(struct ref) + len + 1); | |
881 | memcpy(cpy, ref, sizeof(struct ref) + len + 1); | |
882 | cpy->next = NULL; | |
883 | cpy->symref = ref->symref ? xstrdup(ref->symref) : NULL; | |
884 | cpy->remote_status = ref->remote_status ? xstrdup(ref->remote_status) : NULL; | |
885 | cpy->peer_ref = copy_ref(ref->peer_ref); | |
886 | return cpy; | |
887 | } | |
888 | ||
889 | struct ref *copy_ref_list(const struct ref *ref) | |
890 | { | |
891 | struct ref *ret = NULL; | |
892 | struct ref **tail = &ret; | |
893 | while (ref) { | |
894 | *tail = copy_ref(ref); | |
895 | ref = ref->next; | |
896 | tail = &((*tail)->next); | |
897 | } | |
898 | return ret; | |
899 | } | |
900 | ||
901 | static void free_ref(struct ref *ref) | |
902 | { | |
903 | if (!ref) | |
904 | return; | |
905 | free_ref(ref->peer_ref); | |
906 | free(ref->remote_status); | |
907 | free(ref->symref); | |
908 | free(ref); | |
909 | } | |
910 | ||
911 | void free_refs(struct ref *ref) | |
912 | { | |
913 | struct ref *next; | |
914 | while (ref) { | |
915 | next = ref->next; | |
916 | free_ref(ref); | |
917 | ref = next; | |
918 | } | |
919 | } | |
920 | ||
921 | int ref_compare_name(const void *va, const void *vb) | |
922 | { | |
923 | const struct ref *a = va, *b = vb; | |
924 | return strcmp(a->name, b->name); | |
925 | } | |
926 | ||
927 | static void *ref_list_get_next(const void *a) | |
928 | { | |
929 | return ((const struct ref *)a)->next; | |
930 | } | |
931 | ||
932 | static void ref_list_set_next(void *a, void *next) | |
933 | { | |
934 | ((struct ref *)a)->next = next; | |
935 | } | |
936 | ||
937 | void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *)) | |
938 | { | |
939 | *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp); | |
940 | } | |
941 | ||
942 | static int count_refspec_match(const char *pattern, | |
943 | struct ref *refs, | |
944 | struct ref **matched_ref) | |
945 | { | |
946 | int patlen = strlen(pattern); | |
947 | struct ref *matched_weak = NULL; | |
948 | struct ref *matched = NULL; | |
949 | int weak_match = 0; | |
950 | int match = 0; | |
951 | ||
952 | for (weak_match = match = 0; refs; refs = refs->next) { | |
953 | char *name = refs->name; | |
954 | int namelen = strlen(name); | |
955 | ||
956 | if (!refname_match(pattern, name, ref_rev_parse_rules)) | |
957 | continue; | |
958 | ||
959 | /* A match is "weak" if it is with refs outside | |
960 | * heads or tags, and did not specify the pattern | |
961 | * in full (e.g. "refs/remotes/origin/master") or at | |
962 | * least from the toplevel (e.g. "remotes/origin/master"); | |
963 | * otherwise "git push $URL master" would result in | |
964 | * ambiguity between remotes/origin/master and heads/master | |
965 | * at the remote site. | |
966 | */ | |
967 | if (namelen != patlen && | |
968 | patlen != namelen - 5 && | |
969 | prefixcmp(name, "refs/heads/") && | |
970 | prefixcmp(name, "refs/tags/")) { | |
971 | /* We want to catch the case where only weak | |
972 | * matches are found and there are multiple | |
973 | * matches, and where more than one strong | |
974 | * matches are found, as ambiguous. One | |
975 | * strong match with zero or more weak matches | |
976 | * are acceptable as a unique match. | |
977 | */ | |
978 | matched_weak = refs; | |
979 | weak_match++; | |
980 | } | |
981 | else { | |
982 | matched = refs; | |
983 | match++; | |
984 | } | |
985 | } | |
986 | if (!matched) { | |
987 | *matched_ref = matched_weak; | |
988 | return weak_match; | |
989 | } | |
990 | else { | |
991 | *matched_ref = matched; | |
992 | return match; | |
993 | } | |
994 | } | |
995 | ||
996 | static void tail_link_ref(struct ref *ref, struct ref ***tail) | |
997 | { | |
998 | **tail = ref; | |
999 | while (ref->next) | |
1000 | ref = ref->next; | |
1001 | *tail = &ref->next; | |
1002 | } | |
1003 | ||
1004 | static struct ref *alloc_delete_ref(void) | |
1005 | { | |
1006 | struct ref *ref = alloc_ref("(delete)"); | |
1007 | hashclr(ref->new_sha1); | |
1008 | return ref; | |
1009 | } | |
1010 | ||
1011 | static struct ref *try_explicit_object_name(const char *name) | |
1012 | { | |
1013 | unsigned char sha1[20]; | |
1014 | struct ref *ref; | |
1015 | ||
1016 | if (!*name) | |
1017 | return alloc_delete_ref(); | |
1018 | if (get_sha1(name, sha1)) | |
1019 | return NULL; | |
1020 | ref = alloc_ref(name); | |
1021 | hashcpy(ref->new_sha1, sha1); | |
1022 | return ref; | |
1023 | } | |
1024 | ||
1025 | static struct ref *make_linked_ref(const char *name, struct ref ***tail) | |
1026 | { | |
1027 | struct ref *ret = alloc_ref(name); | |
1028 | tail_link_ref(ret, tail); | |
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | static char *guess_ref(const char *name, struct ref *peer) | |
1033 | { | |
1034 | struct strbuf buf = STRBUF_INIT; | |
1035 | unsigned char sha1[20]; | |
1036 | ||
1037 | const char *r = resolve_ref_unsafe(peer->name, sha1, 1, NULL); | |
1038 | if (!r) | |
1039 | return NULL; | |
1040 | ||
1041 | if (!prefixcmp(r, "refs/heads/")) | |
1042 | strbuf_addstr(&buf, "refs/heads/"); | |
1043 | else if (!prefixcmp(r, "refs/tags/")) | |
1044 | strbuf_addstr(&buf, "refs/tags/"); | |
1045 | else | |
1046 | return NULL; | |
1047 | ||
1048 | strbuf_addstr(&buf, name); | |
1049 | return strbuf_detach(&buf, NULL); | |
1050 | } | |
1051 | ||
1052 | static int match_explicit(struct ref *src, struct ref *dst, | |
1053 | struct ref ***dst_tail, | |
1054 | struct refspec *rs) | |
1055 | { | |
1056 | struct ref *matched_src, *matched_dst; | |
1057 | int copy_src; | |
1058 | ||
1059 | const char *dst_value = rs->dst; | |
1060 | char *dst_guess; | |
1061 | ||
1062 | if (rs->pattern || rs->matching) | |
1063 | return 0; | |
1064 | ||
1065 | matched_src = matched_dst = NULL; | |
1066 | switch (count_refspec_match(rs->src, src, &matched_src)) { | |
1067 | case 1: | |
1068 | copy_src = 1; | |
1069 | break; | |
1070 | case 0: | |
1071 | /* The source could be in the get_sha1() format | |
1072 | * not a reference name. :refs/other is a | |
1073 | * way to delete 'other' ref at the remote end. | |
1074 | */ | |
1075 | matched_src = try_explicit_object_name(rs->src); | |
1076 | if (!matched_src) | |
1077 | return error("src refspec %s does not match any.", rs->src); | |
1078 | copy_src = 0; | |
1079 | break; | |
1080 | default: | |
1081 | return error("src refspec %s matches more than one.", rs->src); | |
1082 | } | |
1083 | ||
1084 | if (!dst_value) { | |
1085 | unsigned char sha1[20]; | |
1086 | int flag; | |
1087 | ||
1088 | dst_value = resolve_ref_unsafe(matched_src->name, sha1, 1, &flag); | |
1089 | if (!dst_value || | |
1090 | ((flag & REF_ISSYMREF) && | |
1091 | prefixcmp(dst_value, "refs/heads/"))) | |
1092 | die("%s cannot be resolved to branch.", | |
1093 | matched_src->name); | |
1094 | } | |
1095 | ||
1096 | switch (count_refspec_match(dst_value, dst, &matched_dst)) { | |
1097 | case 1: | |
1098 | break; | |
1099 | case 0: | |
1100 | if (!memcmp(dst_value, "refs/", 5)) | |
1101 | matched_dst = make_linked_ref(dst_value, dst_tail); | |
1102 | else if (is_null_sha1(matched_src->new_sha1)) | |
1103 | error("unable to delete '%s': remote ref does not exist", | |
1104 | dst_value); | |
1105 | else if ((dst_guess = guess_ref(dst_value, matched_src))) | |
1106 | matched_dst = make_linked_ref(dst_guess, dst_tail); | |
1107 | else | |
1108 | error("unable to push to unqualified destination: %s\n" | |
1109 | "The destination refspec neither matches an " | |
1110 | "existing ref on the remote nor\n" | |
1111 | "begins with refs/, and we are unable to " | |
1112 | "guess a prefix based on the source ref.", | |
1113 | dst_value); | |
1114 | break; | |
1115 | default: | |
1116 | matched_dst = NULL; | |
1117 | error("dst refspec %s matches more than one.", | |
1118 | dst_value); | |
1119 | break; | |
1120 | } | |
1121 | if (!matched_dst) | |
1122 | return -1; | |
1123 | if (matched_dst->peer_ref) | |
1124 | return error("dst ref %s receives from more than one src.", | |
1125 | matched_dst->name); | |
1126 | else { | |
1127 | matched_dst->peer_ref = copy_src ? copy_ref(matched_src) : matched_src; | |
1128 | matched_dst->force = rs->force; | |
1129 | } | |
1130 | return 0; | |
1131 | } | |
1132 | ||
1133 | static int match_explicit_refs(struct ref *src, struct ref *dst, | |
1134 | struct ref ***dst_tail, struct refspec *rs, | |
1135 | int rs_nr) | |
1136 | { | |
1137 | int i, errs; | |
1138 | for (i = errs = 0; i < rs_nr; i++) | |
1139 | errs += match_explicit(src, dst, dst_tail, &rs[i]); | |
1140 | return errs; | |
1141 | } | |
1142 | ||
1143 | static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref, | |
1144 | int send_mirror, int direction, const struct refspec **ret_pat) | |
1145 | { | |
1146 | const struct refspec *pat; | |
1147 | char *name; | |
1148 | int i; | |
1149 | int matching_refs = -1; | |
1150 | for (i = 0; i < rs_nr; i++) { | |
1151 | if (rs[i].matching && | |
1152 | (matching_refs == -1 || rs[i].force)) { | |
1153 | matching_refs = i; | |
1154 | continue; | |
1155 | } | |
1156 | ||
1157 | if (rs[i].pattern) { | |
1158 | const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src; | |
1159 | int match; | |
1160 | if (direction == FROM_SRC) | |
1161 | match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name); | |
1162 | else | |
1163 | match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name); | |
1164 | if (match) { | |
1165 | matching_refs = i; | |
1166 | break; | |
1167 | } | |
1168 | } | |
1169 | } | |
1170 | if (matching_refs == -1) | |
1171 | return NULL; | |
1172 | ||
1173 | pat = rs + matching_refs; | |
1174 | if (pat->matching) { | |
1175 | /* | |
1176 | * "matching refs"; traditionally we pushed everything | |
1177 | * including refs outside refs/heads/ hierarchy, but | |
1178 | * that does not make much sense these days. | |
1179 | */ | |
1180 | if (!send_mirror && prefixcmp(ref->name, "refs/heads/")) | |
1181 | return NULL; | |
1182 | name = xstrdup(ref->name); | |
1183 | } | |
1184 | if (ret_pat) | |
1185 | *ret_pat = pat; | |
1186 | return name; | |
1187 | } | |
1188 | ||
1189 | static struct ref **tail_ref(struct ref **head) | |
1190 | { | |
1191 | struct ref **tail = head; | |
1192 | while (*tail) | |
1193 | tail = &((*tail)->next); | |
1194 | return tail; | |
1195 | } | |
1196 | ||
1197 | struct tips { | |
1198 | struct commit **tip; | |
1199 | int nr, alloc; | |
1200 | }; | |
1201 | ||
1202 | static void add_to_tips(struct tips *tips, const unsigned char *sha1) | |
1203 | { | |
1204 | struct commit *commit; | |
1205 | ||
1206 | if (is_null_sha1(sha1)) | |
1207 | return; | |
1208 | commit = lookup_commit_reference_gently(sha1, 1); | |
1209 | if (!commit || (commit->object.flags & TMP_MARK)) | |
1210 | return; | |
1211 | commit->object.flags |= TMP_MARK; | |
1212 | ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc); | |
1213 | tips->tip[tips->nr++] = commit; | |
1214 | } | |
1215 | ||
1216 | static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail) | |
1217 | { | |
1218 | struct string_list dst_tag = STRING_LIST_INIT_NODUP; | |
1219 | struct string_list src_tag = STRING_LIST_INIT_NODUP; | |
1220 | struct string_list_item *item; | |
1221 | struct ref *ref; | |
1222 | struct tips sent_tips; | |
1223 | ||
1224 | /* | |
1225 | * Collect everything we know they would have at the end of | |
1226 | * this push, and collect all tags they have. | |
1227 | */ | |
1228 | memset(&sent_tips, 0, sizeof(sent_tips)); | |
1229 | for (ref = *dst; ref; ref = ref->next) { | |
1230 | if (ref->peer_ref && | |
1231 | !is_null_sha1(ref->peer_ref->new_sha1)) | |
1232 | add_to_tips(&sent_tips, ref->peer_ref->new_sha1); | |
1233 | else | |
1234 | add_to_tips(&sent_tips, ref->old_sha1); | |
1235 | if (!prefixcmp(ref->name, "refs/tags/")) | |
1236 | string_list_append(&dst_tag, ref->name); | |
1237 | } | |
1238 | clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK); | |
1239 | ||
1240 | sort_string_list(&dst_tag); | |
1241 | ||
1242 | /* Collect tags they do not have. */ | |
1243 | for (ref = src; ref; ref = ref->next) { | |
1244 | if (prefixcmp(ref->name, "refs/tags/")) | |
1245 | continue; /* not a tag */ | |
1246 | if (string_list_has_string(&dst_tag, ref->name)) | |
1247 | continue; /* they already have it */ | |
1248 | if (sha1_object_info(ref->new_sha1, NULL) != OBJ_TAG) | |
1249 | continue; /* be conservative */ | |
1250 | item = string_list_append(&src_tag, ref->name); | |
1251 | item->util = ref; | |
1252 | } | |
1253 | string_list_clear(&dst_tag, 0); | |
1254 | ||
1255 | /* | |
1256 | * At this point, src_tag lists tags that are missing from | |
1257 | * dst, and sent_tips lists the tips we are pushing or those | |
1258 | * that we know they already have. An element in the src_tag | |
1259 | * that is an ancestor of any of the sent_tips needs to be | |
1260 | * sent to the other side. | |
1261 | */ | |
1262 | if (sent_tips.nr) { | |
1263 | for_each_string_list_item(item, &src_tag) { | |
1264 | struct ref *ref = item->util; | |
1265 | struct ref *dst_ref; | |
1266 | struct commit *commit; | |
1267 | ||
1268 | if (is_null_sha1(ref->new_sha1)) | |
1269 | continue; | |
1270 | commit = lookup_commit_reference_gently(ref->new_sha1, 1); | |
1271 | if (!commit) | |
1272 | /* not pushing a commit, which is not an error */ | |
1273 | continue; | |
1274 | ||
1275 | /* | |
1276 | * Is this tag, which they do not have, reachable from | |
1277 | * any of the commits we are sending? | |
1278 | */ | |
1279 | if (!in_merge_bases_many(commit, sent_tips.nr, sent_tips.tip)) | |
1280 | continue; | |
1281 | ||
1282 | /* Add it in */ | |
1283 | dst_ref = make_linked_ref(ref->name, dst_tail); | |
1284 | hashcpy(dst_ref->new_sha1, ref->new_sha1); | |
1285 | dst_ref->peer_ref = copy_ref(ref); | |
1286 | } | |
1287 | } | |
1288 | string_list_clear(&src_tag, 0); | |
1289 | free(sent_tips.tip); | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * Given the set of refs the local repository has, the set of refs the | |
1294 | * remote repository has, and the refspec used for push, determine | |
1295 | * what remote refs we will update and with what value by setting | |
1296 | * peer_ref (which object is being pushed) and force (if the push is | |
1297 | * forced) in elements of "dst". The function may add new elements to | |
1298 | * dst (e.g. pushing to a new branch, done in match_explicit_refs). | |
1299 | */ | |
1300 | int match_push_refs(struct ref *src, struct ref **dst, | |
1301 | int nr_refspec, const char **refspec, int flags) | |
1302 | { | |
1303 | struct refspec *rs; | |
1304 | int send_all = flags & MATCH_REFS_ALL; | |
1305 | int send_mirror = flags & MATCH_REFS_MIRROR; | |
1306 | int send_prune = flags & MATCH_REFS_PRUNE; | |
1307 | int errs; | |
1308 | static const char *default_refspec[] = { ":", NULL }; | |
1309 | struct ref *ref, **dst_tail = tail_ref(dst); | |
1310 | ||
1311 | if (!nr_refspec) { | |
1312 | nr_refspec = 1; | |
1313 | refspec = default_refspec; | |
1314 | } | |
1315 | rs = parse_push_refspec(nr_refspec, (const char **) refspec); | |
1316 | errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec); | |
1317 | ||
1318 | /* pick the remainder */ | |
1319 | for (ref = src; ref; ref = ref->next) { | |
1320 | struct ref *dst_peer; | |
1321 | const struct refspec *pat = NULL; | |
1322 | char *dst_name; | |
1323 | ||
1324 | dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat); | |
1325 | if (!dst_name) | |
1326 | continue; | |
1327 | ||
1328 | dst_peer = find_ref_by_name(*dst, dst_name); | |
1329 | if (dst_peer) { | |
1330 | if (dst_peer->peer_ref) | |
1331 | /* We're already sending something to this ref. */ | |
1332 | goto free_name; | |
1333 | } else { | |
1334 | if (pat->matching && !(send_all || send_mirror)) | |
1335 | /* | |
1336 | * Remote doesn't have it, and we have no | |
1337 | * explicit pattern, and we don't have | |
1338 | * --all nor --mirror. | |
1339 | */ | |
1340 | goto free_name; | |
1341 | ||
1342 | /* Create a new one and link it */ | |
1343 | dst_peer = make_linked_ref(dst_name, &dst_tail); | |
1344 | hashcpy(dst_peer->new_sha1, ref->new_sha1); | |
1345 | } | |
1346 | dst_peer->peer_ref = copy_ref(ref); | |
1347 | dst_peer->force = pat->force; | |
1348 | free_name: | |
1349 | free(dst_name); | |
1350 | } | |
1351 | ||
1352 | if (flags & MATCH_REFS_FOLLOW_TAGS) | |
1353 | add_missing_tags(src, dst, &dst_tail); | |
1354 | ||
1355 | if (send_prune) { | |
1356 | /* check for missing refs on the remote */ | |
1357 | for (ref = *dst; ref; ref = ref->next) { | |
1358 | char *src_name; | |
1359 | ||
1360 | if (ref->peer_ref) | |
1361 | /* We're already sending something to this ref. */ | |
1362 | continue; | |
1363 | ||
1364 | src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL); | |
1365 | if (src_name) { | |
1366 | if (!find_ref_by_name(src, src_name)) | |
1367 | ref->peer_ref = alloc_delete_ref(); | |
1368 | free(src_name); | |
1369 | } | |
1370 | } | |
1371 | } | |
1372 | if (errs) | |
1373 | return -1; | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | void set_ref_status_for_push(struct ref *remote_refs, int send_mirror, | |
1378 | int force_update) | |
1379 | { | |
1380 | struct ref *ref; | |
1381 | ||
1382 | for (ref = remote_refs; ref; ref = ref->next) { | |
1383 | int force_ref_update = ref->force || force_update; | |
1384 | ||
1385 | if (ref->peer_ref) | |
1386 | hashcpy(ref->new_sha1, ref->peer_ref->new_sha1); | |
1387 | else if (!send_mirror) | |
1388 | continue; | |
1389 | ||
1390 | ref->deletion = is_null_sha1(ref->new_sha1); | |
1391 | if (!ref->deletion && | |
1392 | !hashcmp(ref->old_sha1, ref->new_sha1)) { | |
1393 | ref->status = REF_STATUS_UPTODATE; | |
1394 | continue; | |
1395 | } | |
1396 | ||
1397 | /* | |
1398 | * Decide whether an individual refspec A:B can be | |
1399 | * pushed. The push will succeed if any of the | |
1400 | * following are true: | |
1401 | * | |
1402 | * (1) the remote reference B does not exist | |
1403 | * | |
1404 | * (2) the remote reference B is being removed (i.e., | |
1405 | * pushing :B where no source is specified) | |
1406 | * | |
1407 | * (3) the destination is not under refs/tags/, and | |
1408 | * if the old and new value is a commit, the new | |
1409 | * is a descendant of the old. | |
1410 | * | |
1411 | * (4) it is forced using the +A:B notation, or by | |
1412 | * passing the --force argument | |
1413 | */ | |
1414 | ||
1415 | if (!ref->deletion && !is_null_sha1(ref->old_sha1)) { | |
1416 | int why = 0; /* why would this push require --force? */ | |
1417 | ||
1418 | if (!prefixcmp(ref->name, "refs/tags/")) | |
1419 | why = REF_STATUS_REJECT_ALREADY_EXISTS; | |
1420 | else if (!has_sha1_file(ref->old_sha1)) | |
1421 | why = REF_STATUS_REJECT_FETCH_FIRST; | |
1422 | else if (!lookup_commit_reference_gently(ref->old_sha1, 1) || | |
1423 | !lookup_commit_reference_gently(ref->new_sha1, 1)) | |
1424 | why = REF_STATUS_REJECT_NEEDS_FORCE; | |
1425 | else if (!ref_newer(ref->new_sha1, ref->old_sha1)) | |
1426 | why = REF_STATUS_REJECT_NONFASTFORWARD; | |
1427 | ||
1428 | if (!force_ref_update) | |
1429 | ref->status = why; | |
1430 | else if (why) | |
1431 | ref->forced_update = 1; | |
1432 | } | |
1433 | } | |
1434 | } | |
1435 | ||
1436 | struct branch *branch_get(const char *name) | |
1437 | { | |
1438 | struct branch *ret; | |
1439 | ||
1440 | read_config(); | |
1441 | if (!name || !*name || !strcmp(name, "HEAD")) | |
1442 | ret = current_branch; | |
1443 | else | |
1444 | ret = make_branch(name, 0); | |
1445 | if (ret && ret->remote_name) { | |
1446 | ret->remote = remote_get(ret->remote_name); | |
1447 | if (ret->merge_nr) { | |
1448 | int i; | |
1449 | ret->merge = xcalloc(sizeof(*ret->merge), | |
1450 | ret->merge_nr); | |
1451 | for (i = 0; i < ret->merge_nr; i++) { | |
1452 | ret->merge[i] = xcalloc(1, sizeof(**ret->merge)); | |
1453 | ret->merge[i]->src = xstrdup(ret->merge_name[i]); | |
1454 | if (remote_find_tracking(ret->remote, ret->merge[i]) | |
1455 | && !strcmp(ret->remote_name, ".")) | |
1456 | ret->merge[i]->dst = xstrdup(ret->merge_name[i]); | |
1457 | } | |
1458 | } | |
1459 | } | |
1460 | return ret; | |
1461 | } | |
1462 | ||
1463 | int branch_has_merge_config(struct branch *branch) | |
1464 | { | |
1465 | return branch && !!branch->merge; | |
1466 | } | |
1467 | ||
1468 | int branch_merge_matches(struct branch *branch, | |
1469 | int i, | |
1470 | const char *refname) | |
1471 | { | |
1472 | if (!branch || i < 0 || i >= branch->merge_nr) | |
1473 | return 0; | |
1474 | return refname_match(branch->merge[i]->src, refname, ref_fetch_rules); | |
1475 | } | |
1476 | ||
1477 | static int ignore_symref_update(const char *refname) | |
1478 | { | |
1479 | unsigned char sha1[20]; | |
1480 | int flag; | |
1481 | ||
1482 | if (!resolve_ref_unsafe(refname, sha1, 0, &flag)) | |
1483 | return 0; /* non-existing refs are OK */ | |
1484 | return (flag & REF_ISSYMREF); | |
1485 | } | |
1486 | ||
1487 | static struct ref *get_expanded_map(const struct ref *remote_refs, | |
1488 | const struct refspec *refspec) | |
1489 | { | |
1490 | const struct ref *ref; | |
1491 | struct ref *ret = NULL; | |
1492 | struct ref **tail = &ret; | |
1493 | ||
1494 | char *expn_name; | |
1495 | ||
1496 | for (ref = remote_refs; ref; ref = ref->next) { | |
1497 | if (strchr(ref->name, '^')) | |
1498 | continue; /* a dereference item */ | |
1499 | if (match_name_with_pattern(refspec->src, ref->name, | |
1500 | refspec->dst, &expn_name) && | |
1501 | !ignore_symref_update(expn_name)) { | |
1502 | struct ref *cpy = copy_ref(ref); | |
1503 | ||
1504 | cpy->peer_ref = alloc_ref(expn_name); | |
1505 | free(expn_name); | |
1506 | if (refspec->force) | |
1507 | cpy->peer_ref->force = 1; | |
1508 | *tail = cpy; | |
1509 | tail = &cpy->next; | |
1510 | } | |
1511 | } | |
1512 | ||
1513 | return ret; | |
1514 | } | |
1515 | ||
1516 | static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name) | |
1517 | { | |
1518 | const struct ref *ref; | |
1519 | for (ref = refs; ref; ref = ref->next) { | |
1520 | if (refname_match(name, ref->name, ref_fetch_rules)) | |
1521 | return ref; | |
1522 | } | |
1523 | return NULL; | |
1524 | } | |
1525 | ||
1526 | struct ref *get_remote_ref(const struct ref *remote_refs, const char *name) | |
1527 | { | |
1528 | const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name); | |
1529 | ||
1530 | if (!ref) | |
1531 | return NULL; | |
1532 | ||
1533 | return copy_ref(ref); | |
1534 | } | |
1535 | ||
1536 | static struct ref *get_local_ref(const char *name) | |
1537 | { | |
1538 | if (!name || name[0] == '\0') | |
1539 | return NULL; | |
1540 | ||
1541 | if (!prefixcmp(name, "refs/")) | |
1542 | return alloc_ref(name); | |
1543 | ||
1544 | if (!prefixcmp(name, "heads/") || | |
1545 | !prefixcmp(name, "tags/") || | |
1546 | !prefixcmp(name, "remotes/")) | |
1547 | return alloc_ref_with_prefix("refs/", 5, name); | |
1548 | ||
1549 | return alloc_ref_with_prefix("refs/heads/", 11, name); | |
1550 | } | |
1551 | ||
1552 | int get_fetch_map(const struct ref *remote_refs, | |
1553 | const struct refspec *refspec, | |
1554 | struct ref ***tail, | |
1555 | int missing_ok) | |
1556 | { | |
1557 | struct ref *ref_map, **rmp; | |
1558 | ||
1559 | if (refspec->pattern) { | |
1560 | ref_map = get_expanded_map(remote_refs, refspec); | |
1561 | } else { | |
1562 | const char *name = refspec->src[0] ? refspec->src : "HEAD"; | |
1563 | ||
1564 | if (refspec->exact_sha1) { | |
1565 | ref_map = alloc_ref(name); | |
1566 | get_sha1_hex(name, ref_map->old_sha1); | |
1567 | } else { | |
1568 | ref_map = get_remote_ref(remote_refs, name); | |
1569 | } | |
1570 | if (!missing_ok && !ref_map) | |
1571 | die("Couldn't find remote ref %s", name); | |
1572 | if (ref_map) { | |
1573 | ref_map->peer_ref = get_local_ref(refspec->dst); | |
1574 | if (ref_map->peer_ref && refspec->force) | |
1575 | ref_map->peer_ref->force = 1; | |
1576 | } | |
1577 | } | |
1578 | ||
1579 | for (rmp = &ref_map; *rmp; ) { | |
1580 | if ((*rmp)->peer_ref) { | |
1581 | if (prefixcmp((*rmp)->peer_ref->name, "refs/") || | |
1582 | check_refname_format((*rmp)->peer_ref->name, 0)) { | |
1583 | struct ref *ignore = *rmp; | |
1584 | error("* Ignoring funny ref '%s' locally", | |
1585 | (*rmp)->peer_ref->name); | |
1586 | *rmp = (*rmp)->next; | |
1587 | free(ignore->peer_ref); | |
1588 | free(ignore); | |
1589 | continue; | |
1590 | } | |
1591 | } | |
1592 | rmp = &((*rmp)->next); | |
1593 | } | |
1594 | ||
1595 | if (ref_map) | |
1596 | tail_link_ref(ref_map, tail); | |
1597 | ||
1598 | return 0; | |
1599 | } | |
1600 | ||
1601 | int resolve_remote_symref(struct ref *ref, struct ref *list) | |
1602 | { | |
1603 | if (!ref->symref) | |
1604 | return 0; | |
1605 | for (; list; list = list->next) | |
1606 | if (!strcmp(ref->symref, list->name)) { | |
1607 | hashcpy(ref->old_sha1, list->old_sha1); | |
1608 | return 0; | |
1609 | } | |
1610 | return 1; | |
1611 | } | |
1612 | ||
1613 | static void unmark_and_free(struct commit_list *list, unsigned int mark) | |
1614 | { | |
1615 | while (list) { | |
1616 | struct commit_list *temp = list; | |
1617 | temp->item->object.flags &= ~mark; | |
1618 | list = temp->next; | |
1619 | free(temp); | |
1620 | } | |
1621 | } | |
1622 | ||
1623 | int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1) | |
1624 | { | |
1625 | struct object *o; | |
1626 | struct commit *old, *new; | |
1627 | struct commit_list *list, *used; | |
1628 | int found = 0; | |
1629 | ||
1630 | /* | |
1631 | * Both new and old must be commit-ish and new is descendant of | |
1632 | * old. Otherwise we require --force. | |
1633 | */ | |
1634 | o = deref_tag(parse_object(old_sha1), NULL, 0); | |
1635 | if (!o || o->type != OBJ_COMMIT) | |
1636 | return 0; | |
1637 | old = (struct commit *) o; | |
1638 | ||
1639 | o = deref_tag(parse_object(new_sha1), NULL, 0); | |
1640 | if (!o || o->type != OBJ_COMMIT) | |
1641 | return 0; | |
1642 | new = (struct commit *) o; | |
1643 | ||
1644 | if (parse_commit(new) < 0) | |
1645 | return 0; | |
1646 | ||
1647 | used = list = NULL; | |
1648 | commit_list_insert(new, &list); | |
1649 | while (list) { | |
1650 | new = pop_most_recent_commit(&list, TMP_MARK); | |
1651 | commit_list_insert(new, &used); | |
1652 | if (new == old) { | |
1653 | found = 1; | |
1654 | break; | |
1655 | } | |
1656 | } | |
1657 | unmark_and_free(list, TMP_MARK); | |
1658 | unmark_and_free(used, TMP_MARK); | |
1659 | return found; | |
1660 | } | |
1661 | ||
1662 | /* | |
1663 | * Return true if there is anything to report, otherwise false. | |
1664 | */ | |
1665 | int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs) | |
1666 | { | |
1667 | unsigned char sha1[20]; | |
1668 | struct commit *ours, *theirs; | |
1669 | char symmetric[84]; | |
1670 | struct rev_info revs; | |
1671 | const char *rev_argv[10], *base; | |
1672 | int rev_argc; | |
1673 | ||
1674 | /* | |
1675 | * Nothing to report unless we are marked to build on top of | |
1676 | * somebody else. | |
1677 | */ | |
1678 | if (!branch || | |
1679 | !branch->merge || !branch->merge[0] || !branch->merge[0]->dst) | |
1680 | return 0; | |
1681 | ||
1682 | /* | |
1683 | * If what we used to build on no longer exists, there is | |
1684 | * nothing to report. | |
1685 | */ | |
1686 | base = branch->merge[0]->dst; | |
1687 | if (read_ref(base, sha1)) | |
1688 | return 0; | |
1689 | theirs = lookup_commit_reference(sha1); | |
1690 | if (!theirs) | |
1691 | return 0; | |
1692 | ||
1693 | if (read_ref(branch->refname, sha1)) | |
1694 | return 0; | |
1695 | ours = lookup_commit_reference(sha1); | |
1696 | if (!ours) | |
1697 | return 0; | |
1698 | ||
1699 | /* are we the same? */ | |
1700 | if (theirs == ours) | |
1701 | return 0; | |
1702 | ||
1703 | /* Run "rev-list --left-right ours...theirs" internally... */ | |
1704 | rev_argc = 0; | |
1705 | rev_argv[rev_argc++] = NULL; | |
1706 | rev_argv[rev_argc++] = "--left-right"; | |
1707 | rev_argv[rev_argc++] = symmetric; | |
1708 | rev_argv[rev_argc++] = "--"; | |
1709 | rev_argv[rev_argc] = NULL; | |
1710 | ||
1711 | strcpy(symmetric, sha1_to_hex(ours->object.sha1)); | |
1712 | strcpy(symmetric + 40, "..."); | |
1713 | strcpy(symmetric + 43, sha1_to_hex(theirs->object.sha1)); | |
1714 | ||
1715 | init_revisions(&revs, NULL); | |
1716 | setup_revisions(rev_argc, rev_argv, &revs, NULL); | |
1717 | prepare_revision_walk(&revs); | |
1718 | ||
1719 | /* ... and count the commits on each side. */ | |
1720 | *num_ours = 0; | |
1721 | *num_theirs = 0; | |
1722 | while (1) { | |
1723 | struct commit *c = get_revision(&revs); | |
1724 | if (!c) | |
1725 | break; | |
1726 | if (c->object.flags & SYMMETRIC_LEFT) | |
1727 | (*num_ours)++; | |
1728 | else | |
1729 | (*num_theirs)++; | |
1730 | } | |
1731 | ||
1732 | /* clear object flags smudged by the above traversal */ | |
1733 | clear_commit_marks(ours, ALL_REV_FLAGS); | |
1734 | clear_commit_marks(theirs, ALL_REV_FLAGS); | |
1735 | return 1; | |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * Return true when there is anything to report, otherwise false. | |
1740 | */ | |
1741 | int format_tracking_info(struct branch *branch, struct strbuf *sb) | |
1742 | { | |
1743 | int num_ours, num_theirs; | |
1744 | const char *base; | |
1745 | ||
1746 | if (!stat_tracking_info(branch, &num_ours, &num_theirs)) | |
1747 | return 0; | |
1748 | ||
1749 | base = branch->merge[0]->dst; | |
1750 | base = shorten_unambiguous_ref(base, 0); | |
1751 | if (!num_theirs) { | |
1752 | strbuf_addf(sb, | |
1753 | Q_("Your branch is ahead of '%s' by %d commit.\n", | |
1754 | "Your branch is ahead of '%s' by %d commits.\n", | |
1755 | num_ours), | |
1756 | base, num_ours); | |
1757 | if (advice_status_hints) | |
1758 | strbuf_addf(sb, | |
1759 | _(" (use \"git push\" to publish your local commits)\n")); | |
1760 | } else if (!num_ours) { | |
1761 | strbuf_addf(sb, | |
1762 | Q_("Your branch is behind '%s' by %d commit, " | |
1763 | "and can be fast-forwarded.\n", | |
1764 | "Your branch is behind '%s' by %d commits, " | |
1765 | "and can be fast-forwarded.\n", | |
1766 | num_theirs), | |
1767 | base, num_theirs); | |
1768 | if (advice_status_hints) | |
1769 | strbuf_addf(sb, | |
1770 | _(" (use \"git pull\" to update your local branch)\n")); | |
1771 | } else { | |
1772 | strbuf_addf(sb, | |
1773 | Q_("Your branch and '%s' have diverged,\n" | |
1774 | "and have %d and %d different commit each, " | |
1775 | "respectively.\n", | |
1776 | "Your branch and '%s' have diverged,\n" | |
1777 | "and have %d and %d different commits each, " | |
1778 | "respectively.\n", | |
1779 | num_theirs), | |
1780 | base, num_ours, num_theirs); | |
1781 | if (advice_status_hints) | |
1782 | strbuf_addf(sb, | |
1783 | _(" (use \"git pull\" to merge the remote branch into yours)\n")); | |
1784 | } | |
1785 | return 1; | |
1786 | } | |
1787 | ||
1788 | static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
1789 | { | |
1790 | struct ref ***local_tail = cb_data; | |
1791 | struct ref *ref; | |
1792 | int len; | |
1793 | ||
1794 | /* we already know it starts with refs/ to get here */ | |
1795 | if (check_refname_format(refname + 5, 0)) | |
1796 | return 0; | |
1797 | ||
1798 | len = strlen(refname) + 1; | |
1799 | ref = xcalloc(1, sizeof(*ref) + len); | |
1800 | hashcpy(ref->new_sha1, sha1); | |
1801 | memcpy(ref->name, refname, len); | |
1802 | **local_tail = ref; | |
1803 | *local_tail = &ref->next; | |
1804 | return 0; | |
1805 | } | |
1806 | ||
1807 | struct ref *get_local_heads(void) | |
1808 | { | |
1809 | struct ref *local_refs = NULL, **local_tail = &local_refs; | |
1810 | for_each_ref(one_local_ref, &local_tail); | |
1811 | return local_refs; | |
1812 | } | |
1813 | ||
1814 | struct ref *guess_remote_head(const struct ref *head, | |
1815 | const struct ref *refs, | |
1816 | int all) | |
1817 | { | |
1818 | const struct ref *r; | |
1819 | struct ref *list = NULL; | |
1820 | struct ref **tail = &list; | |
1821 | ||
1822 | if (!head) | |
1823 | return NULL; | |
1824 | ||
1825 | /* | |
1826 | * Some transports support directly peeking at | |
1827 | * where HEAD points; if that is the case, then | |
1828 | * we don't have to guess. | |
1829 | */ | |
1830 | if (head->symref) | |
1831 | return copy_ref(find_ref_by_name(refs, head->symref)); | |
1832 | ||
1833 | /* If refs/heads/master could be right, it is. */ | |
1834 | if (!all) { | |
1835 | r = find_ref_by_name(refs, "refs/heads/master"); | |
1836 | if (r && !hashcmp(r->old_sha1, head->old_sha1)) | |
1837 | return copy_ref(r); | |
1838 | } | |
1839 | ||
1840 | /* Look for another ref that points there */ | |
1841 | for (r = refs; r; r = r->next) { | |
1842 | if (r != head && | |
1843 | !prefixcmp(r->name, "refs/heads/") && | |
1844 | !hashcmp(r->old_sha1, head->old_sha1)) { | |
1845 | *tail = copy_ref(r); | |
1846 | tail = &((*tail)->next); | |
1847 | if (!all) | |
1848 | break; | |
1849 | } | |
1850 | } | |
1851 | ||
1852 | return list; | |
1853 | } | |
1854 | ||
1855 | struct stale_heads_info { | |
1856 | struct string_list *ref_names; | |
1857 | struct ref **stale_refs_tail; | |
1858 | struct refspec *refs; | |
1859 | int ref_count; | |
1860 | }; | |
1861 | ||
1862 | static int get_stale_heads_cb(const char *refname, | |
1863 | const unsigned char *sha1, int flags, void *cb_data) | |
1864 | { | |
1865 | struct stale_heads_info *info = cb_data; | |
1866 | struct refspec query; | |
1867 | memset(&query, 0, sizeof(struct refspec)); | |
1868 | query.dst = (char *)refname; | |
1869 | ||
1870 | if (query_refspecs(info->refs, info->ref_count, &query)) | |
1871 | return 0; /* No matches */ | |
1872 | ||
1873 | /* | |
1874 | * If we did find a suitable refspec and it's not a symref and | |
1875 | * it's not in the list of refs that currently exist in that | |
1876 | * remote we consider it to be stale. | |
1877 | */ | |
1878 | if (!((flags & REF_ISSYMREF) || | |
1879 | string_list_has_string(info->ref_names, query.src))) { | |
1880 | struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail); | |
1881 | hashcpy(ref->new_sha1, sha1); | |
1882 | } | |
1883 | ||
1884 | free(query.src); | |
1885 | return 0; | |
1886 | } | |
1887 | ||
1888 | struct ref *get_stale_heads(struct refspec *refs, int ref_count, struct ref *fetch_map) | |
1889 | { | |
1890 | struct ref *ref, *stale_refs = NULL; | |
1891 | struct string_list ref_names = STRING_LIST_INIT_NODUP; | |
1892 | struct stale_heads_info info; | |
1893 | info.ref_names = &ref_names; | |
1894 | info.stale_refs_tail = &stale_refs; | |
1895 | info.refs = refs; | |
1896 | info.ref_count = ref_count; | |
1897 | for (ref = fetch_map; ref; ref = ref->next) | |
1898 | string_list_append(&ref_names, ref->name); | |
1899 | sort_string_list(&ref_names); | |
1900 | for_each_ref(get_stale_heads_cb, &info); | |
1901 | string_list_clear(&ref_names, 0); | |
1902 | return stale_refs; | |
1903 | } |