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1 | #include "cache.h" | |
2 | #include "config.h" | |
3 | #include "remote.h" | |
4 | #include "refs.h" | |
5 | #include "refspec.h" | |
6 | #include "object-store.h" | |
7 | #include "commit.h" | |
8 | #include "diff.h" | |
9 | #include "revision.h" | |
10 | #include "dir.h" | |
11 | #include "tag.h" | |
12 | #include "string-list.h" | |
13 | #include "mergesort.h" | |
14 | #include "strvec.h" | |
15 | #include "commit-reach.h" | |
16 | #include "advice.h" | |
17 | ||
18 | enum map_direction { FROM_SRC, FROM_DST }; | |
19 | ||
20 | struct counted_string { | |
21 | size_t len; | |
22 | const char *s; | |
23 | }; | |
24 | ||
25 | static int valid_remote(const struct remote *remote) | |
26 | { | |
27 | return (!!remote->url) || (!!remote->foreign_vcs); | |
28 | } | |
29 | ||
30 | static const char *alias_url(const char *url, struct rewrites *r) | |
31 | { | |
32 | int i, j; | |
33 | struct counted_string *longest; | |
34 | int longest_i; | |
35 | ||
36 | longest = NULL; | |
37 | longest_i = -1; | |
38 | for (i = 0; i < r->rewrite_nr; i++) { | |
39 | if (!r->rewrite[i]) | |
40 | continue; | |
41 | for (j = 0; j < r->rewrite[i]->instead_of_nr; j++) { | |
42 | if (starts_with(url, r->rewrite[i]->instead_of[j].s) && | |
43 | (!longest || | |
44 | longest->len < r->rewrite[i]->instead_of[j].len)) { | |
45 | longest = &(r->rewrite[i]->instead_of[j]); | |
46 | longest_i = i; | |
47 | } | |
48 | } | |
49 | } | |
50 | if (!longest) | |
51 | return url; | |
52 | ||
53 | return xstrfmt("%s%s", r->rewrite[longest_i]->base, url + longest->len); | |
54 | } | |
55 | ||
56 | static void add_url(struct remote *remote, const char *url) | |
57 | { | |
58 | ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc); | |
59 | remote->url[remote->url_nr++] = url; | |
60 | } | |
61 | ||
62 | static void add_pushurl(struct remote *remote, const char *pushurl) | |
63 | { | |
64 | ALLOC_GROW(remote->pushurl, remote->pushurl_nr + 1, remote->pushurl_alloc); | |
65 | remote->pushurl[remote->pushurl_nr++] = pushurl; | |
66 | } | |
67 | ||
68 | static void add_pushurl_alias(struct remote_state *remote_state, | |
69 | struct remote *remote, const char *url) | |
70 | { | |
71 | const char *pushurl = alias_url(url, &remote_state->rewrites_push); | |
72 | if (pushurl != url) | |
73 | add_pushurl(remote, pushurl); | |
74 | } | |
75 | ||
76 | static void add_url_alias(struct remote_state *remote_state, | |
77 | struct remote *remote, const char *url) | |
78 | { | |
79 | add_url(remote, alias_url(url, &remote_state->rewrites)); | |
80 | add_pushurl_alias(remote_state, remote, url); | |
81 | } | |
82 | ||
83 | struct remotes_hash_key { | |
84 | const char *str; | |
85 | int len; | |
86 | }; | |
87 | ||
88 | static int remotes_hash_cmp(const void *unused_cmp_data, | |
89 | const struct hashmap_entry *eptr, | |
90 | const struct hashmap_entry *entry_or_key, | |
91 | const void *keydata) | |
92 | { | |
93 | const struct remote *a, *b; | |
94 | const struct remotes_hash_key *key = keydata; | |
95 | ||
96 | a = container_of(eptr, const struct remote, ent); | |
97 | b = container_of(entry_or_key, const struct remote, ent); | |
98 | ||
99 | if (key) | |
100 | return strncmp(a->name, key->str, key->len) || a->name[key->len]; | |
101 | else | |
102 | return strcmp(a->name, b->name); | |
103 | } | |
104 | ||
105 | static struct remote *make_remote(struct remote_state *remote_state, | |
106 | const char *name, int len) | |
107 | { | |
108 | struct remote *ret; | |
109 | struct remotes_hash_key lookup; | |
110 | struct hashmap_entry lookup_entry, *e; | |
111 | ||
112 | if (!len) | |
113 | len = strlen(name); | |
114 | ||
115 | lookup.str = name; | |
116 | lookup.len = len; | |
117 | hashmap_entry_init(&lookup_entry, memhash(name, len)); | |
118 | ||
119 | e = hashmap_get(&remote_state->remotes_hash, &lookup_entry, &lookup); | |
120 | if (e) | |
121 | return container_of(e, struct remote, ent); | |
122 | ||
123 | CALLOC_ARRAY(ret, 1); | |
124 | ret->prune = -1; /* unspecified */ | |
125 | ret->prune_tags = -1; /* unspecified */ | |
126 | ret->name = xstrndup(name, len); | |
127 | refspec_init(&ret->push, REFSPEC_PUSH); | |
128 | refspec_init(&ret->fetch, REFSPEC_FETCH); | |
129 | ||
130 | ALLOC_GROW(remote_state->remotes, remote_state->remotes_nr + 1, | |
131 | remote_state->remotes_alloc); | |
132 | remote_state->remotes[remote_state->remotes_nr++] = ret; | |
133 | ||
134 | hashmap_entry_init(&ret->ent, lookup_entry.hash); | |
135 | if (hashmap_put_entry(&remote_state->remotes_hash, ret, ent)) | |
136 | BUG("hashmap_put overwrote entry after hashmap_get returned NULL"); | |
137 | return ret; | |
138 | } | |
139 | ||
140 | static void remote_clear(struct remote *remote) | |
141 | { | |
142 | int i; | |
143 | ||
144 | free((char *)remote->name); | |
145 | free((char *)remote->foreign_vcs); | |
146 | ||
147 | for (i = 0; i < remote->url_nr; i++) | |
148 | free((char *)remote->url[i]); | |
149 | FREE_AND_NULL(remote->pushurl); | |
150 | ||
151 | for (i = 0; i < remote->pushurl_nr; i++) | |
152 | free((char *)remote->pushurl[i]); | |
153 | FREE_AND_NULL(remote->pushurl); | |
154 | free((char *)remote->receivepack); | |
155 | free((char *)remote->uploadpack); | |
156 | FREE_AND_NULL(remote->http_proxy); | |
157 | FREE_AND_NULL(remote->http_proxy_authmethod); | |
158 | } | |
159 | ||
160 | static void add_merge(struct branch *branch, const char *name) | |
161 | { | |
162 | ALLOC_GROW(branch->merge_name, branch->merge_nr + 1, | |
163 | branch->merge_alloc); | |
164 | branch->merge_name[branch->merge_nr++] = name; | |
165 | } | |
166 | ||
167 | struct branches_hash_key { | |
168 | const char *str; | |
169 | int len; | |
170 | }; | |
171 | ||
172 | static int branches_hash_cmp(const void *unused_cmp_data, | |
173 | const struct hashmap_entry *eptr, | |
174 | const struct hashmap_entry *entry_or_key, | |
175 | const void *keydata) | |
176 | { | |
177 | const struct branch *a, *b; | |
178 | const struct branches_hash_key *key = keydata; | |
179 | ||
180 | a = container_of(eptr, const struct branch, ent); | |
181 | b = container_of(entry_or_key, const struct branch, ent); | |
182 | ||
183 | if (key) | |
184 | return strncmp(a->name, key->str, key->len) || | |
185 | a->name[key->len]; | |
186 | else | |
187 | return strcmp(a->name, b->name); | |
188 | } | |
189 | ||
190 | static struct branch *find_branch(struct remote_state *remote_state, | |
191 | const char *name, size_t len) | |
192 | { | |
193 | struct branches_hash_key lookup; | |
194 | struct hashmap_entry lookup_entry, *e; | |
195 | ||
196 | if (!len) | |
197 | len = strlen(name); | |
198 | ||
199 | lookup.str = name; | |
200 | lookup.len = len; | |
201 | hashmap_entry_init(&lookup_entry, memhash(name, len)); | |
202 | ||
203 | e = hashmap_get(&remote_state->branches_hash, &lookup_entry, &lookup); | |
204 | if (e) | |
205 | return container_of(e, struct branch, ent); | |
206 | ||
207 | return NULL; | |
208 | } | |
209 | ||
210 | static void die_on_missing_branch(struct repository *repo, | |
211 | struct branch *branch) | |
212 | { | |
213 | /* branch == NULL is always valid because it represents detached HEAD. */ | |
214 | if (branch && | |
215 | branch != find_branch(repo->remote_state, branch->name, 0)) | |
216 | die("branch %s was not found in the repository", branch->name); | |
217 | } | |
218 | ||
219 | static struct branch *make_branch(struct remote_state *remote_state, | |
220 | const char *name, size_t len) | |
221 | { | |
222 | struct branch *ret; | |
223 | ||
224 | ret = find_branch(remote_state, name, len); | |
225 | if (ret) | |
226 | return ret; | |
227 | ||
228 | CALLOC_ARRAY(ret, 1); | |
229 | ret->name = xstrndup(name, len); | |
230 | ret->refname = xstrfmt("refs/heads/%s", ret->name); | |
231 | ||
232 | hashmap_entry_init(&ret->ent, memhash(name, len)); | |
233 | if (hashmap_put_entry(&remote_state->branches_hash, ret, ent)) | |
234 | BUG("hashmap_put overwrote entry after hashmap_get returned NULL"); | |
235 | return ret; | |
236 | } | |
237 | ||
238 | static struct rewrite *make_rewrite(struct rewrites *r, | |
239 | const char *base, size_t len) | |
240 | { | |
241 | struct rewrite *ret; | |
242 | int i; | |
243 | ||
244 | for (i = 0; i < r->rewrite_nr; i++) { | |
245 | if (len == r->rewrite[i]->baselen && | |
246 | !strncmp(base, r->rewrite[i]->base, len)) | |
247 | return r->rewrite[i]; | |
248 | } | |
249 | ||
250 | ALLOC_GROW(r->rewrite, r->rewrite_nr + 1, r->rewrite_alloc); | |
251 | CALLOC_ARRAY(ret, 1); | |
252 | r->rewrite[r->rewrite_nr++] = ret; | |
253 | ret->base = xstrndup(base, len); | |
254 | ret->baselen = len; | |
255 | return ret; | |
256 | } | |
257 | ||
258 | static void add_instead_of(struct rewrite *rewrite, const char *instead_of) | |
259 | { | |
260 | ALLOC_GROW(rewrite->instead_of, rewrite->instead_of_nr + 1, rewrite->instead_of_alloc); | |
261 | rewrite->instead_of[rewrite->instead_of_nr].s = instead_of; | |
262 | rewrite->instead_of[rewrite->instead_of_nr].len = strlen(instead_of); | |
263 | rewrite->instead_of_nr++; | |
264 | } | |
265 | ||
266 | static const char *skip_spaces(const char *s) | |
267 | { | |
268 | while (isspace(*s)) | |
269 | s++; | |
270 | return s; | |
271 | } | |
272 | ||
273 | static void read_remotes_file(struct remote_state *remote_state, | |
274 | struct remote *remote) | |
275 | { | |
276 | struct strbuf buf = STRBUF_INIT; | |
277 | FILE *f = fopen_or_warn(git_path("remotes/%s", remote->name), "r"); | |
278 | ||
279 | if (!f) | |
280 | return; | |
281 | remote->configured_in_repo = 1; | |
282 | remote->origin = REMOTE_REMOTES; | |
283 | while (strbuf_getline(&buf, f) != EOF) { | |
284 | const char *v; | |
285 | ||
286 | strbuf_rtrim(&buf); | |
287 | ||
288 | if (skip_prefix(buf.buf, "URL:", &v)) | |
289 | add_url_alias(remote_state, remote, | |
290 | xstrdup(skip_spaces(v))); | |
291 | else if (skip_prefix(buf.buf, "Push:", &v)) | |
292 | refspec_append(&remote->push, skip_spaces(v)); | |
293 | else if (skip_prefix(buf.buf, "Pull:", &v)) | |
294 | refspec_append(&remote->fetch, skip_spaces(v)); | |
295 | } | |
296 | strbuf_release(&buf); | |
297 | fclose(f); | |
298 | } | |
299 | ||
300 | static void read_branches_file(struct remote_state *remote_state, | |
301 | struct remote *remote) | |
302 | { | |
303 | char *frag; | |
304 | struct strbuf buf = STRBUF_INIT; | |
305 | FILE *f = fopen_or_warn(git_path("branches/%s", remote->name), "r"); | |
306 | ||
307 | if (!f) | |
308 | return; | |
309 | ||
310 | strbuf_getline_lf(&buf, f); | |
311 | fclose(f); | |
312 | strbuf_trim(&buf); | |
313 | if (!buf.len) { | |
314 | strbuf_release(&buf); | |
315 | return; | |
316 | } | |
317 | ||
318 | remote->configured_in_repo = 1; | |
319 | remote->origin = REMOTE_BRANCHES; | |
320 | ||
321 | /* | |
322 | * The branches file would have URL and optionally | |
323 | * #branch specified. The default (or specified) branch is | |
324 | * fetched and stored in the local branch matching the | |
325 | * remote name. | |
326 | */ | |
327 | frag = strchr(buf.buf, '#'); | |
328 | if (frag) | |
329 | *(frag++) = '\0'; | |
330 | else | |
331 | frag = (char *)git_default_branch_name(0); | |
332 | ||
333 | add_url_alias(remote_state, remote, strbuf_detach(&buf, NULL)); | |
334 | refspec_appendf(&remote->fetch, "refs/heads/%s:refs/heads/%s", | |
335 | frag, remote->name); | |
336 | ||
337 | /* | |
338 | * Cogito compatible push: push current HEAD to remote #branch | |
339 | * (master if missing) | |
340 | */ | |
341 | refspec_appendf(&remote->push, "HEAD:refs/heads/%s", frag); | |
342 | remote->fetch_tags = 1; /* always auto-follow */ | |
343 | } | |
344 | ||
345 | static int handle_config(const char *key, const char *value, void *cb) | |
346 | { | |
347 | const char *name; | |
348 | size_t namelen; | |
349 | const char *subkey; | |
350 | struct remote *remote; | |
351 | struct branch *branch; | |
352 | struct remote_state *remote_state = cb; | |
353 | ||
354 | if (parse_config_key(key, "branch", &name, &namelen, &subkey) >= 0) { | |
355 | if (!name) | |
356 | return 0; | |
357 | branch = make_branch(remote_state, name, namelen); | |
358 | if (!strcmp(subkey, "remote")) { | |
359 | return git_config_string(&branch->remote_name, key, value); | |
360 | } else if (!strcmp(subkey, "pushremote")) { | |
361 | return git_config_string(&branch->pushremote_name, key, value); | |
362 | } else if (!strcmp(subkey, "merge")) { | |
363 | if (!value) | |
364 | return config_error_nonbool(key); | |
365 | add_merge(branch, xstrdup(value)); | |
366 | } | |
367 | return 0; | |
368 | } | |
369 | if (parse_config_key(key, "url", &name, &namelen, &subkey) >= 0) { | |
370 | struct rewrite *rewrite; | |
371 | if (!name) | |
372 | return 0; | |
373 | if (!strcmp(subkey, "insteadof")) { | |
374 | if (!value) | |
375 | return config_error_nonbool(key); | |
376 | rewrite = make_rewrite(&remote_state->rewrites, name, | |
377 | namelen); | |
378 | add_instead_of(rewrite, xstrdup(value)); | |
379 | } else if (!strcmp(subkey, "pushinsteadof")) { | |
380 | if (!value) | |
381 | return config_error_nonbool(key); | |
382 | rewrite = make_rewrite(&remote_state->rewrites_push, | |
383 | name, namelen); | |
384 | add_instead_of(rewrite, xstrdup(value)); | |
385 | } | |
386 | } | |
387 | ||
388 | if (parse_config_key(key, "remote", &name, &namelen, &subkey) < 0) | |
389 | return 0; | |
390 | ||
391 | /* Handle remote.* variables */ | |
392 | if (!name && !strcmp(subkey, "pushdefault")) | |
393 | return git_config_string(&remote_state->pushremote_name, key, | |
394 | value); | |
395 | ||
396 | if (!name) | |
397 | return 0; | |
398 | /* Handle remote.<name>.* variables */ | |
399 | if (*name == '/') { | |
400 | warning(_("config remote shorthand cannot begin with '/': %s"), | |
401 | name); | |
402 | return 0; | |
403 | } | |
404 | remote = make_remote(remote_state, name, namelen); | |
405 | remote->origin = REMOTE_CONFIG; | |
406 | if (current_config_scope() == CONFIG_SCOPE_LOCAL || | |
407 | current_config_scope() == CONFIG_SCOPE_WORKTREE) | |
408 | remote->configured_in_repo = 1; | |
409 | if (!strcmp(subkey, "mirror")) | |
410 | remote->mirror = git_config_bool(key, value); | |
411 | else if (!strcmp(subkey, "skipdefaultupdate")) | |
412 | remote->skip_default_update = git_config_bool(key, value); | |
413 | else if (!strcmp(subkey, "skipfetchall")) | |
414 | remote->skip_default_update = git_config_bool(key, value); | |
415 | else if (!strcmp(subkey, "prune")) | |
416 | remote->prune = git_config_bool(key, value); | |
417 | else if (!strcmp(subkey, "prunetags")) | |
418 | remote->prune_tags = git_config_bool(key, value); | |
419 | else if (!strcmp(subkey, "url")) { | |
420 | const char *v; | |
421 | if (git_config_string(&v, key, value)) | |
422 | return -1; | |
423 | add_url(remote, v); | |
424 | } else if (!strcmp(subkey, "pushurl")) { | |
425 | const char *v; | |
426 | if (git_config_string(&v, key, value)) | |
427 | return -1; | |
428 | add_pushurl(remote, v); | |
429 | } else if (!strcmp(subkey, "push")) { | |
430 | const char *v; | |
431 | if (git_config_string(&v, key, value)) | |
432 | return -1; | |
433 | refspec_append(&remote->push, v); | |
434 | free((char *)v); | |
435 | } else if (!strcmp(subkey, "fetch")) { | |
436 | const char *v; | |
437 | if (git_config_string(&v, key, value)) | |
438 | return -1; | |
439 | refspec_append(&remote->fetch, v); | |
440 | free((char *)v); | |
441 | } else if (!strcmp(subkey, "receivepack")) { | |
442 | const char *v; | |
443 | if (git_config_string(&v, key, value)) | |
444 | return -1; | |
445 | if (!remote->receivepack) | |
446 | remote->receivepack = v; | |
447 | else | |
448 | error(_("more than one receivepack given, using the first")); | |
449 | } else if (!strcmp(subkey, "uploadpack")) { | |
450 | const char *v; | |
451 | if (git_config_string(&v, key, value)) | |
452 | return -1; | |
453 | if (!remote->uploadpack) | |
454 | remote->uploadpack = v; | |
455 | else | |
456 | error(_("more than one uploadpack given, using the first")); | |
457 | } else if (!strcmp(subkey, "tagopt")) { | |
458 | if (!strcmp(value, "--no-tags")) | |
459 | remote->fetch_tags = -1; | |
460 | else if (!strcmp(value, "--tags")) | |
461 | remote->fetch_tags = 2; | |
462 | } else if (!strcmp(subkey, "proxy")) { | |
463 | return git_config_string((const char **)&remote->http_proxy, | |
464 | key, value); | |
465 | } else if (!strcmp(subkey, "proxyauthmethod")) { | |
466 | return git_config_string((const char **)&remote->http_proxy_authmethod, | |
467 | key, value); | |
468 | } else if (!strcmp(subkey, "vcs")) { | |
469 | return git_config_string(&remote->foreign_vcs, key, value); | |
470 | } | |
471 | return 0; | |
472 | } | |
473 | ||
474 | static void alias_all_urls(struct remote_state *remote_state) | |
475 | { | |
476 | int i, j; | |
477 | for (i = 0; i < remote_state->remotes_nr; i++) { | |
478 | int add_pushurl_aliases; | |
479 | if (!remote_state->remotes[i]) | |
480 | continue; | |
481 | for (j = 0; j < remote_state->remotes[i]->pushurl_nr; j++) { | |
482 | remote_state->remotes[i]->pushurl[j] = | |
483 | alias_url(remote_state->remotes[i]->pushurl[j], | |
484 | &remote_state->rewrites); | |
485 | } | |
486 | add_pushurl_aliases = remote_state->remotes[i]->pushurl_nr == 0; | |
487 | for (j = 0; j < remote_state->remotes[i]->url_nr; j++) { | |
488 | if (add_pushurl_aliases) | |
489 | add_pushurl_alias( | |
490 | remote_state, remote_state->remotes[i], | |
491 | remote_state->remotes[i]->url[j]); | |
492 | remote_state->remotes[i]->url[j] = | |
493 | alias_url(remote_state->remotes[i]->url[j], | |
494 | &remote_state->rewrites); | |
495 | } | |
496 | } | |
497 | } | |
498 | ||
499 | static void read_config(struct repository *repo) | |
500 | { | |
501 | int flag; | |
502 | ||
503 | if (repo->remote_state->initialized) | |
504 | return; | |
505 | repo->remote_state->initialized = 1; | |
506 | ||
507 | repo->remote_state->current_branch = NULL; | |
508 | if (startup_info->have_repository) { | |
509 | const char *head_ref = refs_resolve_ref_unsafe( | |
510 | get_main_ref_store(repo), "HEAD", 0, NULL, &flag); | |
511 | if (head_ref && (flag & REF_ISSYMREF) && | |
512 | skip_prefix(head_ref, "refs/heads/", &head_ref)) { | |
513 | repo->remote_state->current_branch = make_branch( | |
514 | repo->remote_state, head_ref, strlen(head_ref)); | |
515 | } | |
516 | } | |
517 | repo_config(repo, handle_config, repo->remote_state); | |
518 | alias_all_urls(repo->remote_state); | |
519 | } | |
520 | ||
521 | static int valid_remote_nick(const char *name) | |
522 | { | |
523 | if (!name[0] || is_dot_or_dotdot(name)) | |
524 | return 0; | |
525 | ||
526 | /* remote nicknames cannot contain slashes */ | |
527 | while (*name) | |
528 | if (is_dir_sep(*name++)) | |
529 | return 0; | |
530 | return 1; | |
531 | } | |
532 | ||
533 | static const char *remotes_remote_for_branch(struct remote_state *remote_state, | |
534 | struct branch *branch, | |
535 | int *explicit) | |
536 | { | |
537 | if (branch && branch->remote_name) { | |
538 | if (explicit) | |
539 | *explicit = 1; | |
540 | return branch->remote_name; | |
541 | } | |
542 | if (explicit) | |
543 | *explicit = 0; | |
544 | return "origin"; | |
545 | } | |
546 | ||
547 | const char *remote_for_branch(struct branch *branch, int *explicit) | |
548 | { | |
549 | read_config(the_repository); | |
550 | die_on_missing_branch(the_repository, branch); | |
551 | ||
552 | return remotes_remote_for_branch(the_repository->remote_state, branch, | |
553 | explicit); | |
554 | } | |
555 | ||
556 | static const char * | |
557 | remotes_pushremote_for_branch(struct remote_state *remote_state, | |
558 | struct branch *branch, int *explicit) | |
559 | { | |
560 | if (branch && branch->pushremote_name) { | |
561 | if (explicit) | |
562 | *explicit = 1; | |
563 | return branch->pushremote_name; | |
564 | } | |
565 | if (remote_state->pushremote_name) { | |
566 | if (explicit) | |
567 | *explicit = 1; | |
568 | return remote_state->pushremote_name; | |
569 | } | |
570 | return remotes_remote_for_branch(remote_state, branch, explicit); | |
571 | } | |
572 | ||
573 | const char *pushremote_for_branch(struct branch *branch, int *explicit) | |
574 | { | |
575 | read_config(the_repository); | |
576 | die_on_missing_branch(the_repository, branch); | |
577 | ||
578 | return remotes_pushremote_for_branch(the_repository->remote_state, | |
579 | branch, explicit); | |
580 | } | |
581 | ||
582 | static struct remote *remotes_remote_get(struct remote_state *remote_state, | |
583 | const char *name); | |
584 | ||
585 | const char *remote_ref_for_branch(struct branch *branch, int for_push) | |
586 | { | |
587 | read_config(the_repository); | |
588 | die_on_missing_branch(the_repository, branch); | |
589 | ||
590 | if (branch) { | |
591 | if (!for_push) { | |
592 | if (branch->merge_nr) { | |
593 | return branch->merge_name[0]; | |
594 | } | |
595 | } else { | |
596 | const char *dst, | |
597 | *remote_name = remotes_pushremote_for_branch( | |
598 | the_repository->remote_state, branch, | |
599 | NULL); | |
600 | struct remote *remote = remotes_remote_get( | |
601 | the_repository->remote_state, remote_name); | |
602 | ||
603 | if (remote && remote->push.nr && | |
604 | (dst = apply_refspecs(&remote->push, | |
605 | branch->refname))) { | |
606 | return dst; | |
607 | } | |
608 | } | |
609 | } | |
610 | return NULL; | |
611 | } | |
612 | ||
613 | static struct remote * | |
614 | remotes_remote_get_1(struct remote_state *remote_state, const char *name, | |
615 | const char *(*get_default)(struct remote_state *, | |
616 | struct branch *, int *)) | |
617 | { | |
618 | struct remote *ret; | |
619 | int name_given = 0; | |
620 | ||
621 | if (name) | |
622 | name_given = 1; | |
623 | else | |
624 | name = get_default(remote_state, remote_state->current_branch, | |
625 | &name_given); | |
626 | ||
627 | ret = make_remote(remote_state, name, 0); | |
628 | if (valid_remote_nick(name) && have_git_dir()) { | |
629 | if (!valid_remote(ret)) | |
630 | read_remotes_file(remote_state, ret); | |
631 | if (!valid_remote(ret)) | |
632 | read_branches_file(remote_state, ret); | |
633 | } | |
634 | if (name_given && !valid_remote(ret)) | |
635 | add_url_alias(remote_state, ret, name); | |
636 | if (!valid_remote(ret)) | |
637 | return NULL; | |
638 | return ret; | |
639 | } | |
640 | ||
641 | static inline struct remote * | |
642 | remotes_remote_get(struct remote_state *remote_state, const char *name) | |
643 | { | |
644 | return remotes_remote_get_1(remote_state, name, | |
645 | remotes_remote_for_branch); | |
646 | } | |
647 | ||
648 | struct remote *remote_get(const char *name) | |
649 | { | |
650 | read_config(the_repository); | |
651 | return remotes_remote_get(the_repository->remote_state, name); | |
652 | } | |
653 | ||
654 | static inline struct remote * | |
655 | remotes_pushremote_get(struct remote_state *remote_state, const char *name) | |
656 | { | |
657 | return remotes_remote_get_1(remote_state, name, | |
658 | remotes_pushremote_for_branch); | |
659 | } | |
660 | ||
661 | struct remote *pushremote_get(const char *name) | |
662 | { | |
663 | read_config(the_repository); | |
664 | return remotes_pushremote_get(the_repository->remote_state, name); | |
665 | } | |
666 | ||
667 | int remote_is_configured(struct remote *remote, int in_repo) | |
668 | { | |
669 | if (!remote) | |
670 | return 0; | |
671 | if (in_repo) | |
672 | return remote->configured_in_repo; | |
673 | return !!remote->origin; | |
674 | } | |
675 | ||
676 | int for_each_remote(each_remote_fn fn, void *priv) | |
677 | { | |
678 | int i, result = 0; | |
679 | read_config(the_repository); | |
680 | for (i = 0; i < the_repository->remote_state->remotes_nr && !result; | |
681 | i++) { | |
682 | struct remote *remote = | |
683 | the_repository->remote_state->remotes[i]; | |
684 | if (!remote) | |
685 | continue; | |
686 | result = fn(remote, priv); | |
687 | } | |
688 | return result; | |
689 | } | |
690 | ||
691 | static void handle_duplicate(struct ref *ref1, struct ref *ref2) | |
692 | { | |
693 | if (strcmp(ref1->name, ref2->name)) { | |
694 | if (ref1->fetch_head_status != FETCH_HEAD_IGNORE && | |
695 | ref2->fetch_head_status != FETCH_HEAD_IGNORE) { | |
696 | die(_("Cannot fetch both %s and %s to %s"), | |
697 | ref1->name, ref2->name, ref2->peer_ref->name); | |
698 | } else if (ref1->fetch_head_status != FETCH_HEAD_IGNORE && | |
699 | ref2->fetch_head_status == FETCH_HEAD_IGNORE) { | |
700 | warning(_("%s usually tracks %s, not %s"), | |
701 | ref2->peer_ref->name, ref2->name, ref1->name); | |
702 | } else if (ref1->fetch_head_status == FETCH_HEAD_IGNORE && | |
703 | ref2->fetch_head_status == FETCH_HEAD_IGNORE) { | |
704 | die(_("%s tracks both %s and %s"), | |
705 | ref2->peer_ref->name, ref1->name, ref2->name); | |
706 | } else { | |
707 | /* | |
708 | * This last possibility doesn't occur because | |
709 | * FETCH_HEAD_IGNORE entries always appear at | |
710 | * the end of the list. | |
711 | */ | |
712 | BUG("Internal error"); | |
713 | } | |
714 | } | |
715 | free(ref2->peer_ref); | |
716 | free(ref2); | |
717 | } | |
718 | ||
719 | struct ref *ref_remove_duplicates(struct ref *ref_map) | |
720 | { | |
721 | struct string_list refs = STRING_LIST_INIT_NODUP; | |
722 | struct ref *retval = NULL; | |
723 | struct ref **p = &retval; | |
724 | ||
725 | while (ref_map) { | |
726 | struct ref *ref = ref_map; | |
727 | ||
728 | ref_map = ref_map->next; | |
729 | ref->next = NULL; | |
730 | ||
731 | if (!ref->peer_ref) { | |
732 | *p = ref; | |
733 | p = &ref->next; | |
734 | } else { | |
735 | struct string_list_item *item = | |
736 | string_list_insert(&refs, ref->peer_ref->name); | |
737 | ||
738 | if (item->util) { | |
739 | /* Entry already existed */ | |
740 | handle_duplicate((struct ref *)item->util, ref); | |
741 | } else { | |
742 | *p = ref; | |
743 | p = &ref->next; | |
744 | item->util = ref; | |
745 | } | |
746 | } | |
747 | } | |
748 | ||
749 | string_list_clear(&refs, 0); | |
750 | return retval; | |
751 | } | |
752 | ||
753 | int remote_has_url(struct remote *remote, const char *url) | |
754 | { | |
755 | int i; | |
756 | for (i = 0; i < remote->url_nr; i++) { | |
757 | if (!strcmp(remote->url[i], url)) | |
758 | return 1; | |
759 | } | |
760 | return 0; | |
761 | } | |
762 | ||
763 | static int match_name_with_pattern(const char *key, const char *name, | |
764 | const char *value, char **result) | |
765 | { | |
766 | const char *kstar = strchr(key, '*'); | |
767 | size_t klen; | |
768 | size_t ksuffixlen; | |
769 | size_t namelen; | |
770 | int ret; | |
771 | if (!kstar) | |
772 | die(_("key '%s' of pattern had no '*'"), key); | |
773 | klen = kstar - key; | |
774 | ksuffixlen = strlen(kstar + 1); | |
775 | namelen = strlen(name); | |
776 | ret = !strncmp(name, key, klen) && namelen >= klen + ksuffixlen && | |
777 | !memcmp(name + namelen - ksuffixlen, kstar + 1, ksuffixlen); | |
778 | if (ret && value) { | |
779 | struct strbuf sb = STRBUF_INIT; | |
780 | const char *vstar = strchr(value, '*'); | |
781 | if (!vstar) | |
782 | die(_("value '%s' of pattern has no '*'"), value); | |
783 | strbuf_add(&sb, value, vstar - value); | |
784 | strbuf_add(&sb, name + klen, namelen - klen - ksuffixlen); | |
785 | strbuf_addstr(&sb, vstar + 1); | |
786 | *result = strbuf_detach(&sb, NULL); | |
787 | } | |
788 | return ret; | |
789 | } | |
790 | ||
791 | static int refspec_match(const struct refspec_item *refspec, | |
792 | const char *name) | |
793 | { | |
794 | if (refspec->pattern) | |
795 | return match_name_with_pattern(refspec->src, name, NULL, NULL); | |
796 | ||
797 | return !strcmp(refspec->src, name); | |
798 | } | |
799 | ||
800 | static int omit_name_by_refspec(const char *name, struct refspec *rs) | |
801 | { | |
802 | int i; | |
803 | ||
804 | for (i = 0; i < rs->nr; i++) { | |
805 | if (rs->items[i].negative && refspec_match(&rs->items[i], name)) | |
806 | return 1; | |
807 | } | |
808 | return 0; | |
809 | } | |
810 | ||
811 | struct ref *apply_negative_refspecs(struct ref *ref_map, struct refspec *rs) | |
812 | { | |
813 | struct ref **tail; | |
814 | ||
815 | for (tail = &ref_map; *tail; ) { | |
816 | struct ref *ref = *tail; | |
817 | ||
818 | if (omit_name_by_refspec(ref->name, rs)) { | |
819 | *tail = ref->next; | |
820 | free(ref->peer_ref); | |
821 | free(ref); | |
822 | } else | |
823 | tail = &ref->next; | |
824 | } | |
825 | ||
826 | return ref_map; | |
827 | } | |
828 | ||
829 | static int query_matches_negative_refspec(struct refspec *rs, struct refspec_item *query) | |
830 | { | |
831 | int i, matched_negative = 0; | |
832 | int find_src = !query->src; | |
833 | struct string_list reversed = STRING_LIST_INIT_NODUP; | |
834 | const char *needle = find_src ? query->dst : query->src; | |
835 | ||
836 | /* | |
837 | * Check whether the queried ref matches any negative refpsec. If so, | |
838 | * then we should ultimately treat this as not matching the query at | |
839 | * all. | |
840 | * | |
841 | * Note that negative refspecs always match the source, but the query | |
842 | * item uses the destination. To handle this, we apply pattern | |
843 | * refspecs in reverse to figure out if the query source matches any | |
844 | * of the negative refspecs. | |
845 | * | |
846 | * The first loop finds and expands all positive refspecs | |
847 | * matched by the queried ref. | |
848 | * | |
849 | * The second loop checks if any of the results of the first loop | |
850 | * match any negative refspec. | |
851 | */ | |
852 | for (i = 0; i < rs->nr; i++) { | |
853 | struct refspec_item *refspec = &rs->items[i]; | |
854 | char *expn_name; | |
855 | ||
856 | if (refspec->negative) | |
857 | continue; | |
858 | ||
859 | /* Note the reversal of src and dst */ | |
860 | if (refspec->pattern) { | |
861 | const char *key = refspec->dst ? refspec->dst : refspec->src; | |
862 | const char *value = refspec->src; | |
863 | ||
864 | if (match_name_with_pattern(key, needle, value, &expn_name)) | |
865 | string_list_append_nodup(&reversed, expn_name); | |
866 | } else if (refspec->matching) { | |
867 | /* For the special matching refspec, any query should match */ | |
868 | string_list_append(&reversed, needle); | |
869 | } else if (!refspec->src) { | |
870 | BUG("refspec->src should not be null here"); | |
871 | } else if (!strcmp(needle, refspec->src)) { | |
872 | string_list_append(&reversed, refspec->src); | |
873 | } | |
874 | } | |
875 | ||
876 | for (i = 0; !matched_negative && i < reversed.nr; i++) { | |
877 | if (omit_name_by_refspec(reversed.items[i].string, rs)) | |
878 | matched_negative = 1; | |
879 | } | |
880 | ||
881 | string_list_clear(&reversed, 0); | |
882 | ||
883 | return matched_negative; | |
884 | } | |
885 | ||
886 | static void query_refspecs_multiple(struct refspec *rs, | |
887 | struct refspec_item *query, | |
888 | struct string_list *results) | |
889 | { | |
890 | int i; | |
891 | int find_src = !query->src; | |
892 | ||
893 | if (find_src && !query->dst) | |
894 | BUG("query_refspecs_multiple: need either src or dst"); | |
895 | ||
896 | if (query_matches_negative_refspec(rs, query)) | |
897 | return; | |
898 | ||
899 | for (i = 0; i < rs->nr; i++) { | |
900 | struct refspec_item *refspec = &rs->items[i]; | |
901 | const char *key = find_src ? refspec->dst : refspec->src; | |
902 | const char *value = find_src ? refspec->src : refspec->dst; | |
903 | const char *needle = find_src ? query->dst : query->src; | |
904 | char **result = find_src ? &query->src : &query->dst; | |
905 | ||
906 | if (!refspec->dst || refspec->negative) | |
907 | continue; | |
908 | if (refspec->pattern) { | |
909 | if (match_name_with_pattern(key, needle, value, result)) | |
910 | string_list_append_nodup(results, *result); | |
911 | } else if (!strcmp(needle, key)) { | |
912 | string_list_append(results, value); | |
913 | } | |
914 | } | |
915 | } | |
916 | ||
917 | int query_refspecs(struct refspec *rs, struct refspec_item *query) | |
918 | { | |
919 | int i; | |
920 | int find_src = !query->src; | |
921 | const char *needle = find_src ? query->dst : query->src; | |
922 | char **result = find_src ? &query->src : &query->dst; | |
923 | ||
924 | if (find_src && !query->dst) | |
925 | BUG("query_refspecs: need either src or dst"); | |
926 | ||
927 | if (query_matches_negative_refspec(rs, query)) | |
928 | return -1; | |
929 | ||
930 | for (i = 0; i < rs->nr; i++) { | |
931 | struct refspec_item *refspec = &rs->items[i]; | |
932 | const char *key = find_src ? refspec->dst : refspec->src; | |
933 | const char *value = find_src ? refspec->src : refspec->dst; | |
934 | ||
935 | if (!refspec->dst || refspec->negative) | |
936 | continue; | |
937 | if (refspec->pattern) { | |
938 | if (match_name_with_pattern(key, needle, value, result)) { | |
939 | query->force = refspec->force; | |
940 | return 0; | |
941 | } | |
942 | } else if (!strcmp(needle, key)) { | |
943 | *result = xstrdup(value); | |
944 | query->force = refspec->force; | |
945 | return 0; | |
946 | } | |
947 | } | |
948 | return -1; | |
949 | } | |
950 | ||
951 | char *apply_refspecs(struct refspec *rs, const char *name) | |
952 | { | |
953 | struct refspec_item query; | |
954 | ||
955 | memset(&query, 0, sizeof(struct refspec_item)); | |
956 | query.src = (char *)name; | |
957 | ||
958 | if (query_refspecs(rs, &query)) | |
959 | return NULL; | |
960 | ||
961 | return query.dst; | |
962 | } | |
963 | ||
964 | int remote_find_tracking(struct remote *remote, struct refspec_item *refspec) | |
965 | { | |
966 | return query_refspecs(&remote->fetch, refspec); | |
967 | } | |
968 | ||
969 | static struct ref *alloc_ref_with_prefix(const char *prefix, size_t prefixlen, | |
970 | const char *name) | |
971 | { | |
972 | size_t len = strlen(name); | |
973 | struct ref *ref = xcalloc(1, st_add4(sizeof(*ref), prefixlen, len, 1)); | |
974 | memcpy(ref->name, prefix, prefixlen); | |
975 | memcpy(ref->name + prefixlen, name, len); | |
976 | return ref; | |
977 | } | |
978 | ||
979 | struct ref *alloc_ref(const char *name) | |
980 | { | |
981 | return alloc_ref_with_prefix("", 0, name); | |
982 | } | |
983 | ||
984 | struct ref *copy_ref(const struct ref *ref) | |
985 | { | |
986 | struct ref *cpy; | |
987 | size_t len; | |
988 | if (!ref) | |
989 | return NULL; | |
990 | len = st_add3(sizeof(struct ref), strlen(ref->name), 1); | |
991 | cpy = xmalloc(len); | |
992 | memcpy(cpy, ref, len); | |
993 | cpy->next = NULL; | |
994 | cpy->symref = xstrdup_or_null(ref->symref); | |
995 | cpy->remote_status = xstrdup_or_null(ref->remote_status); | |
996 | cpy->peer_ref = copy_ref(ref->peer_ref); | |
997 | return cpy; | |
998 | } | |
999 | ||
1000 | struct ref *copy_ref_list(const struct ref *ref) | |
1001 | { | |
1002 | struct ref *ret = NULL; | |
1003 | struct ref **tail = &ret; | |
1004 | while (ref) { | |
1005 | *tail = copy_ref(ref); | |
1006 | ref = ref->next; | |
1007 | tail = &((*tail)->next); | |
1008 | } | |
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | void free_one_ref(struct ref *ref) | |
1013 | { | |
1014 | if (!ref) | |
1015 | return; | |
1016 | free_one_ref(ref->peer_ref); | |
1017 | free(ref->remote_status); | |
1018 | free(ref->symref); | |
1019 | free(ref); | |
1020 | } | |
1021 | ||
1022 | void free_refs(struct ref *ref) | |
1023 | { | |
1024 | struct ref *next; | |
1025 | while (ref) { | |
1026 | next = ref->next; | |
1027 | free_one_ref(ref); | |
1028 | ref = next; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | int ref_compare_name(const void *va, const void *vb) | |
1033 | { | |
1034 | const struct ref *a = va, *b = vb; | |
1035 | return strcmp(a->name, b->name); | |
1036 | } | |
1037 | ||
1038 | static void *ref_list_get_next(const void *a) | |
1039 | { | |
1040 | return ((const struct ref *)a)->next; | |
1041 | } | |
1042 | ||
1043 | static void ref_list_set_next(void *a, void *next) | |
1044 | { | |
1045 | ((struct ref *)a)->next = next; | |
1046 | } | |
1047 | ||
1048 | void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *)) | |
1049 | { | |
1050 | *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp); | |
1051 | } | |
1052 | ||
1053 | int count_refspec_match(const char *pattern, | |
1054 | struct ref *refs, | |
1055 | struct ref **matched_ref) | |
1056 | { | |
1057 | int patlen = strlen(pattern); | |
1058 | struct ref *matched_weak = NULL; | |
1059 | struct ref *matched = NULL; | |
1060 | int weak_match = 0; | |
1061 | int match = 0; | |
1062 | ||
1063 | for (weak_match = match = 0; refs; refs = refs->next) { | |
1064 | char *name = refs->name; | |
1065 | int namelen = strlen(name); | |
1066 | ||
1067 | if (!refname_match(pattern, name)) | |
1068 | continue; | |
1069 | ||
1070 | /* A match is "weak" if it is with refs outside | |
1071 | * heads or tags, and did not specify the pattern | |
1072 | * in full (e.g. "refs/remotes/origin/master") or at | |
1073 | * least from the toplevel (e.g. "remotes/origin/master"); | |
1074 | * otherwise "git push $URL master" would result in | |
1075 | * ambiguity between remotes/origin/master and heads/master | |
1076 | * at the remote site. | |
1077 | */ | |
1078 | if (namelen != patlen && | |
1079 | patlen != namelen - 5 && | |
1080 | !starts_with(name, "refs/heads/") && | |
1081 | !starts_with(name, "refs/tags/")) { | |
1082 | /* We want to catch the case where only weak | |
1083 | * matches are found and there are multiple | |
1084 | * matches, and where more than one strong | |
1085 | * matches are found, as ambiguous. One | |
1086 | * strong match with zero or more weak matches | |
1087 | * are acceptable as a unique match. | |
1088 | */ | |
1089 | matched_weak = refs; | |
1090 | weak_match++; | |
1091 | } | |
1092 | else { | |
1093 | matched = refs; | |
1094 | match++; | |
1095 | } | |
1096 | } | |
1097 | if (!matched) { | |
1098 | if (matched_ref) | |
1099 | *matched_ref = matched_weak; | |
1100 | return weak_match; | |
1101 | } | |
1102 | else { | |
1103 | if (matched_ref) | |
1104 | *matched_ref = matched; | |
1105 | return match; | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | static void tail_link_ref(struct ref *ref, struct ref ***tail) | |
1110 | { | |
1111 | **tail = ref; | |
1112 | while (ref->next) | |
1113 | ref = ref->next; | |
1114 | *tail = &ref->next; | |
1115 | } | |
1116 | ||
1117 | static struct ref *alloc_delete_ref(void) | |
1118 | { | |
1119 | struct ref *ref = alloc_ref("(delete)"); | |
1120 | oidclr(&ref->new_oid); | |
1121 | return ref; | |
1122 | } | |
1123 | ||
1124 | static int try_explicit_object_name(const char *name, | |
1125 | struct ref **match) | |
1126 | { | |
1127 | struct object_id oid; | |
1128 | ||
1129 | if (!*name) { | |
1130 | if (match) | |
1131 | *match = alloc_delete_ref(); | |
1132 | return 0; | |
1133 | } | |
1134 | ||
1135 | if (get_oid(name, &oid)) | |
1136 | return -1; | |
1137 | ||
1138 | if (match) { | |
1139 | *match = alloc_ref(name); | |
1140 | oidcpy(&(*match)->new_oid, &oid); | |
1141 | } | |
1142 | return 0; | |
1143 | } | |
1144 | ||
1145 | static struct ref *make_linked_ref(const char *name, struct ref ***tail) | |
1146 | { | |
1147 | struct ref *ret = alloc_ref(name); | |
1148 | tail_link_ref(ret, tail); | |
1149 | return ret; | |
1150 | } | |
1151 | ||
1152 | static char *guess_ref(const char *name, struct ref *peer) | |
1153 | { | |
1154 | struct strbuf buf = STRBUF_INIT; | |
1155 | ||
1156 | const char *r = resolve_ref_unsafe(peer->name, RESOLVE_REF_READING, | |
1157 | NULL, NULL); | |
1158 | if (!r) | |
1159 | return NULL; | |
1160 | ||
1161 | if (starts_with(r, "refs/heads/")) { | |
1162 | strbuf_addstr(&buf, "refs/heads/"); | |
1163 | } else if (starts_with(r, "refs/tags/")) { | |
1164 | strbuf_addstr(&buf, "refs/tags/"); | |
1165 | } else { | |
1166 | return NULL; | |
1167 | } | |
1168 | ||
1169 | strbuf_addstr(&buf, name); | |
1170 | return strbuf_detach(&buf, NULL); | |
1171 | } | |
1172 | ||
1173 | static int match_explicit_lhs(struct ref *src, | |
1174 | struct refspec_item *rs, | |
1175 | struct ref **match, | |
1176 | int *allocated_match) | |
1177 | { | |
1178 | switch (count_refspec_match(rs->src, src, match)) { | |
1179 | case 1: | |
1180 | if (allocated_match) | |
1181 | *allocated_match = 0; | |
1182 | return 0; | |
1183 | case 0: | |
1184 | /* The source could be in the get_sha1() format | |
1185 | * not a reference name. :refs/other is a | |
1186 | * way to delete 'other' ref at the remote end. | |
1187 | */ | |
1188 | if (try_explicit_object_name(rs->src, match) < 0) | |
1189 | return error(_("src refspec %s does not match any"), rs->src); | |
1190 | if (allocated_match) | |
1191 | *allocated_match = 1; | |
1192 | return 0; | |
1193 | default: | |
1194 | return error(_("src refspec %s matches more than one"), rs->src); | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | static void show_push_unqualified_ref_name_error(const char *dst_value, | |
1199 | const char *matched_src_name) | |
1200 | { | |
1201 | struct object_id oid; | |
1202 | enum object_type type; | |
1203 | ||
1204 | /* | |
1205 | * TRANSLATORS: "matches '%s'%" is the <dst> part of "git push | |
1206 | * <remote> <src>:<dst>" push, and "being pushed ('%s')" is | |
1207 | * the <src>. | |
1208 | */ | |
1209 | error(_("The destination you provided is not a full refname (i.e.,\n" | |
1210 | "starting with \"refs/\"). We tried to guess what you meant by:\n" | |
1211 | "\n" | |
1212 | "- Looking for a ref that matches '%s' on the remote side.\n" | |
1213 | "- Checking if the <src> being pushed ('%s')\n" | |
1214 | " is a ref in \"refs/{heads,tags}/\". If so we add a corresponding\n" | |
1215 | " refs/{heads,tags}/ prefix on the remote side.\n" | |
1216 | "\n" | |
1217 | "Neither worked, so we gave up. You must fully qualify the ref."), | |
1218 | dst_value, matched_src_name); | |
1219 | ||
1220 | if (!advice_enabled(ADVICE_PUSH_UNQUALIFIED_REF_NAME)) | |
1221 | return; | |
1222 | ||
1223 | if (get_oid(matched_src_name, &oid)) | |
1224 | BUG("'%s' is not a valid object, " | |
1225 | "match_explicit_lhs() should catch this!", | |
1226 | matched_src_name); | |
1227 | type = oid_object_info(the_repository, &oid, NULL); | |
1228 | if (type == OBJ_COMMIT) { | |
1229 | advise(_("The <src> part of the refspec is a commit object.\n" | |
1230 | "Did you mean to create a new branch by pushing to\n" | |
1231 | "'%s:refs/heads/%s'?"), | |
1232 | matched_src_name, dst_value); | |
1233 | } else if (type == OBJ_TAG) { | |
1234 | advise(_("The <src> part of the refspec is a tag object.\n" | |
1235 | "Did you mean to create a new tag by pushing to\n" | |
1236 | "'%s:refs/tags/%s'?"), | |
1237 | matched_src_name, dst_value); | |
1238 | } else if (type == OBJ_TREE) { | |
1239 | advise(_("The <src> part of the refspec is a tree object.\n" | |
1240 | "Did you mean to tag a new tree by pushing to\n" | |
1241 | "'%s:refs/tags/%s'?"), | |
1242 | matched_src_name, dst_value); | |
1243 | } else if (type == OBJ_BLOB) { | |
1244 | advise(_("The <src> part of the refspec is a blob object.\n" | |
1245 | "Did you mean to tag a new blob by pushing to\n" | |
1246 | "'%s:refs/tags/%s'?"), | |
1247 | matched_src_name, dst_value); | |
1248 | } else { | |
1249 | BUG("'%s' should be commit/tag/tree/blob, is '%d'", | |
1250 | matched_src_name, type); | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | static int match_explicit(struct ref *src, struct ref *dst, | |
1255 | struct ref ***dst_tail, | |
1256 | struct refspec_item *rs) | |
1257 | { | |
1258 | struct ref *matched_src, *matched_dst; | |
1259 | int allocated_src; | |
1260 | ||
1261 | const char *dst_value = rs->dst; | |
1262 | char *dst_guess; | |
1263 | ||
1264 | if (rs->pattern || rs->matching || rs->negative) | |
1265 | return 0; | |
1266 | ||
1267 | matched_src = matched_dst = NULL; | |
1268 | if (match_explicit_lhs(src, rs, &matched_src, &allocated_src) < 0) | |
1269 | return -1; | |
1270 | ||
1271 | if (!dst_value) { | |
1272 | int flag; | |
1273 | ||
1274 | dst_value = resolve_ref_unsafe(matched_src->name, | |
1275 | RESOLVE_REF_READING, | |
1276 | NULL, &flag); | |
1277 | if (!dst_value || | |
1278 | ((flag & REF_ISSYMREF) && | |
1279 | !starts_with(dst_value, "refs/heads/"))) | |
1280 | die(_("%s cannot be resolved to branch"), | |
1281 | matched_src->name); | |
1282 | } | |
1283 | ||
1284 | switch (count_refspec_match(dst_value, dst, &matched_dst)) { | |
1285 | case 1: | |
1286 | break; | |
1287 | case 0: | |
1288 | if (starts_with(dst_value, "refs/")) { | |
1289 | matched_dst = make_linked_ref(dst_value, dst_tail); | |
1290 | } else if (is_null_oid(&matched_src->new_oid)) { | |
1291 | error(_("unable to delete '%s': remote ref does not exist"), | |
1292 | dst_value); | |
1293 | } else if ((dst_guess = guess_ref(dst_value, matched_src))) { | |
1294 | matched_dst = make_linked_ref(dst_guess, dst_tail); | |
1295 | free(dst_guess); | |
1296 | } else { | |
1297 | show_push_unqualified_ref_name_error(dst_value, | |
1298 | matched_src->name); | |
1299 | } | |
1300 | break; | |
1301 | default: | |
1302 | matched_dst = NULL; | |
1303 | error(_("dst refspec %s matches more than one"), | |
1304 | dst_value); | |
1305 | break; | |
1306 | } | |
1307 | if (!matched_dst) | |
1308 | return -1; | |
1309 | if (matched_dst->peer_ref) | |
1310 | return error(_("dst ref %s receives from more than one src"), | |
1311 | matched_dst->name); | |
1312 | else { | |
1313 | matched_dst->peer_ref = allocated_src ? | |
1314 | matched_src : | |
1315 | copy_ref(matched_src); | |
1316 | matched_dst->force = rs->force; | |
1317 | } | |
1318 | return 0; | |
1319 | } | |
1320 | ||
1321 | static int match_explicit_refs(struct ref *src, struct ref *dst, | |
1322 | struct ref ***dst_tail, struct refspec *rs) | |
1323 | { | |
1324 | int i, errs; | |
1325 | for (i = errs = 0; i < rs->nr; i++) | |
1326 | errs += match_explicit(src, dst, dst_tail, &rs->items[i]); | |
1327 | return errs; | |
1328 | } | |
1329 | ||
1330 | static char *get_ref_match(const struct refspec *rs, const struct ref *ref, | |
1331 | int send_mirror, int direction, | |
1332 | const struct refspec_item **ret_pat) | |
1333 | { | |
1334 | const struct refspec_item *pat; | |
1335 | char *name; | |
1336 | int i; | |
1337 | int matching_refs = -1; | |
1338 | for (i = 0; i < rs->nr; i++) { | |
1339 | const struct refspec_item *item = &rs->items[i]; | |
1340 | ||
1341 | if (item->negative) | |
1342 | continue; | |
1343 | ||
1344 | if (item->matching && | |
1345 | (matching_refs == -1 || item->force)) { | |
1346 | matching_refs = i; | |
1347 | continue; | |
1348 | } | |
1349 | ||
1350 | if (item->pattern) { | |
1351 | const char *dst_side = item->dst ? item->dst : item->src; | |
1352 | int match; | |
1353 | if (direction == FROM_SRC) | |
1354 | match = match_name_with_pattern(item->src, ref->name, dst_side, &name); | |
1355 | else | |
1356 | match = match_name_with_pattern(dst_side, ref->name, item->src, &name); | |
1357 | if (match) { | |
1358 | matching_refs = i; | |
1359 | break; | |
1360 | } | |
1361 | } | |
1362 | } | |
1363 | if (matching_refs == -1) | |
1364 | return NULL; | |
1365 | ||
1366 | pat = &rs->items[matching_refs]; | |
1367 | if (pat->matching) { | |
1368 | /* | |
1369 | * "matching refs"; traditionally we pushed everything | |
1370 | * including refs outside refs/heads/ hierarchy, but | |
1371 | * that does not make much sense these days. | |
1372 | */ | |
1373 | if (!send_mirror && !starts_with(ref->name, "refs/heads/")) | |
1374 | return NULL; | |
1375 | name = xstrdup(ref->name); | |
1376 | } | |
1377 | if (ret_pat) | |
1378 | *ret_pat = pat; | |
1379 | return name; | |
1380 | } | |
1381 | ||
1382 | static struct ref **tail_ref(struct ref **head) | |
1383 | { | |
1384 | struct ref **tail = head; | |
1385 | while (*tail) | |
1386 | tail = &((*tail)->next); | |
1387 | return tail; | |
1388 | } | |
1389 | ||
1390 | struct tips { | |
1391 | struct commit **tip; | |
1392 | int nr, alloc; | |
1393 | }; | |
1394 | ||
1395 | static void add_to_tips(struct tips *tips, const struct object_id *oid) | |
1396 | { | |
1397 | struct commit *commit; | |
1398 | ||
1399 | if (is_null_oid(oid)) | |
1400 | return; | |
1401 | commit = lookup_commit_reference_gently(the_repository, oid, 1); | |
1402 | if (!commit || (commit->object.flags & TMP_MARK)) | |
1403 | return; | |
1404 | commit->object.flags |= TMP_MARK; | |
1405 | ALLOC_GROW(tips->tip, tips->nr + 1, tips->alloc); | |
1406 | tips->tip[tips->nr++] = commit; | |
1407 | } | |
1408 | ||
1409 | static void add_missing_tags(struct ref *src, struct ref **dst, struct ref ***dst_tail) | |
1410 | { | |
1411 | struct string_list dst_tag = STRING_LIST_INIT_NODUP; | |
1412 | struct string_list src_tag = STRING_LIST_INIT_NODUP; | |
1413 | struct string_list_item *item; | |
1414 | struct ref *ref; | |
1415 | struct tips sent_tips; | |
1416 | ||
1417 | /* | |
1418 | * Collect everything we know they would have at the end of | |
1419 | * this push, and collect all tags they have. | |
1420 | */ | |
1421 | memset(&sent_tips, 0, sizeof(sent_tips)); | |
1422 | for (ref = *dst; ref; ref = ref->next) { | |
1423 | if (ref->peer_ref && | |
1424 | !is_null_oid(&ref->peer_ref->new_oid)) | |
1425 | add_to_tips(&sent_tips, &ref->peer_ref->new_oid); | |
1426 | else | |
1427 | add_to_tips(&sent_tips, &ref->old_oid); | |
1428 | if (starts_with(ref->name, "refs/tags/")) | |
1429 | string_list_append(&dst_tag, ref->name); | |
1430 | } | |
1431 | clear_commit_marks_many(sent_tips.nr, sent_tips.tip, TMP_MARK); | |
1432 | ||
1433 | string_list_sort(&dst_tag); | |
1434 | ||
1435 | /* Collect tags they do not have. */ | |
1436 | for (ref = src; ref; ref = ref->next) { | |
1437 | if (!starts_with(ref->name, "refs/tags/")) | |
1438 | continue; /* not a tag */ | |
1439 | if (string_list_has_string(&dst_tag, ref->name)) | |
1440 | continue; /* they already have it */ | |
1441 | if (oid_object_info(the_repository, &ref->new_oid, NULL) != OBJ_TAG) | |
1442 | continue; /* be conservative */ | |
1443 | item = string_list_append(&src_tag, ref->name); | |
1444 | item->util = ref; | |
1445 | } | |
1446 | string_list_clear(&dst_tag, 0); | |
1447 | ||
1448 | /* | |
1449 | * At this point, src_tag lists tags that are missing from | |
1450 | * dst, and sent_tips lists the tips we are pushing or those | |
1451 | * that we know they already have. An element in the src_tag | |
1452 | * that is an ancestor of any of the sent_tips needs to be | |
1453 | * sent to the other side. | |
1454 | */ | |
1455 | if (sent_tips.nr) { | |
1456 | const int reachable_flag = 1; | |
1457 | struct commit_list *found_commits; | |
1458 | struct commit **src_commits; | |
1459 | int nr_src_commits = 0, alloc_src_commits = 16; | |
1460 | ALLOC_ARRAY(src_commits, alloc_src_commits); | |
1461 | ||
1462 | for_each_string_list_item(item, &src_tag) { | |
1463 | struct ref *ref = item->util; | |
1464 | struct commit *commit; | |
1465 | ||
1466 | if (is_null_oid(&ref->new_oid)) | |
1467 | continue; | |
1468 | commit = lookup_commit_reference_gently(the_repository, | |
1469 | &ref->new_oid, | |
1470 | 1); | |
1471 | if (!commit) | |
1472 | /* not pushing a commit, which is not an error */ | |
1473 | continue; | |
1474 | ||
1475 | ALLOC_GROW(src_commits, nr_src_commits + 1, alloc_src_commits); | |
1476 | src_commits[nr_src_commits++] = commit; | |
1477 | } | |
1478 | ||
1479 | found_commits = get_reachable_subset(sent_tips.tip, sent_tips.nr, | |
1480 | src_commits, nr_src_commits, | |
1481 | reachable_flag); | |
1482 | ||
1483 | for_each_string_list_item(item, &src_tag) { | |
1484 | struct ref *dst_ref; | |
1485 | struct ref *ref = item->util; | |
1486 | struct commit *commit; | |
1487 | ||
1488 | if (is_null_oid(&ref->new_oid)) | |
1489 | continue; | |
1490 | commit = lookup_commit_reference_gently(the_repository, | |
1491 | &ref->new_oid, | |
1492 | 1); | |
1493 | if (!commit) | |
1494 | /* not pushing a commit, which is not an error */ | |
1495 | continue; | |
1496 | ||
1497 | /* | |
1498 | * Is this tag, which they do not have, reachable from | |
1499 | * any of the commits we are sending? | |
1500 | */ | |
1501 | if (!(commit->object.flags & reachable_flag)) | |
1502 | continue; | |
1503 | ||
1504 | /* Add it in */ | |
1505 | dst_ref = make_linked_ref(ref->name, dst_tail); | |
1506 | oidcpy(&dst_ref->new_oid, &ref->new_oid); | |
1507 | dst_ref->peer_ref = copy_ref(ref); | |
1508 | } | |
1509 | ||
1510 | clear_commit_marks_many(nr_src_commits, src_commits, reachable_flag); | |
1511 | free(src_commits); | |
1512 | free_commit_list(found_commits); | |
1513 | } | |
1514 | ||
1515 | string_list_clear(&src_tag, 0); | |
1516 | free(sent_tips.tip); | |
1517 | } | |
1518 | ||
1519 | struct ref *find_ref_by_name(const struct ref *list, const char *name) | |
1520 | { | |
1521 | for ( ; list; list = list->next) | |
1522 | if (!strcmp(list->name, name)) | |
1523 | return (struct ref *)list; | |
1524 | return NULL; | |
1525 | } | |
1526 | ||
1527 | static void prepare_ref_index(struct string_list *ref_index, struct ref *ref) | |
1528 | { | |
1529 | for ( ; ref; ref = ref->next) | |
1530 | string_list_append_nodup(ref_index, ref->name)->util = ref; | |
1531 | ||
1532 | string_list_sort(ref_index); | |
1533 | } | |
1534 | ||
1535 | /* | |
1536 | * Given only the set of local refs, sanity-check the set of push | |
1537 | * refspecs. We can't catch all errors that match_push_refs would, | |
1538 | * but we can catch some errors early before even talking to the | |
1539 | * remote side. | |
1540 | */ | |
1541 | int check_push_refs(struct ref *src, struct refspec *rs) | |
1542 | { | |
1543 | int ret = 0; | |
1544 | int i; | |
1545 | ||
1546 | for (i = 0; i < rs->nr; i++) { | |
1547 | struct refspec_item *item = &rs->items[i]; | |
1548 | ||
1549 | if (item->pattern || item->matching || item->negative) | |
1550 | continue; | |
1551 | ||
1552 | ret |= match_explicit_lhs(src, item, NULL, NULL); | |
1553 | } | |
1554 | ||
1555 | return ret; | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * Given the set of refs the local repository has, the set of refs the | |
1560 | * remote repository has, and the refspec used for push, determine | |
1561 | * what remote refs we will update and with what value by setting | |
1562 | * peer_ref (which object is being pushed) and force (if the push is | |
1563 | * forced) in elements of "dst". The function may add new elements to | |
1564 | * dst (e.g. pushing to a new branch, done in match_explicit_refs). | |
1565 | */ | |
1566 | int match_push_refs(struct ref *src, struct ref **dst, | |
1567 | struct refspec *rs, int flags) | |
1568 | { | |
1569 | int send_all = flags & MATCH_REFS_ALL; | |
1570 | int send_mirror = flags & MATCH_REFS_MIRROR; | |
1571 | int send_prune = flags & MATCH_REFS_PRUNE; | |
1572 | int errs; | |
1573 | struct ref *ref, **dst_tail = tail_ref(dst); | |
1574 | struct string_list dst_ref_index = STRING_LIST_INIT_NODUP; | |
1575 | ||
1576 | /* If no refspec is provided, use the default ":" */ | |
1577 | if (!rs->nr) | |
1578 | refspec_append(rs, ":"); | |
1579 | ||
1580 | errs = match_explicit_refs(src, *dst, &dst_tail, rs); | |
1581 | ||
1582 | /* pick the remainder */ | |
1583 | for (ref = src; ref; ref = ref->next) { | |
1584 | struct string_list_item *dst_item; | |
1585 | struct ref *dst_peer; | |
1586 | const struct refspec_item *pat = NULL; | |
1587 | char *dst_name; | |
1588 | ||
1589 | dst_name = get_ref_match(rs, ref, send_mirror, FROM_SRC, &pat); | |
1590 | if (!dst_name) | |
1591 | continue; | |
1592 | ||
1593 | if (!dst_ref_index.nr) | |
1594 | prepare_ref_index(&dst_ref_index, *dst); | |
1595 | ||
1596 | dst_item = string_list_lookup(&dst_ref_index, dst_name); | |
1597 | dst_peer = dst_item ? dst_item->util : NULL; | |
1598 | if (dst_peer) { | |
1599 | if (dst_peer->peer_ref) | |
1600 | /* We're already sending something to this ref. */ | |
1601 | goto free_name; | |
1602 | } else { | |
1603 | if (pat->matching && !(send_all || send_mirror)) | |
1604 | /* | |
1605 | * Remote doesn't have it, and we have no | |
1606 | * explicit pattern, and we don't have | |
1607 | * --all or --mirror. | |
1608 | */ | |
1609 | goto free_name; | |
1610 | ||
1611 | /* Create a new one and link it */ | |
1612 | dst_peer = make_linked_ref(dst_name, &dst_tail); | |
1613 | oidcpy(&dst_peer->new_oid, &ref->new_oid); | |
1614 | string_list_insert(&dst_ref_index, | |
1615 | dst_peer->name)->util = dst_peer; | |
1616 | } | |
1617 | dst_peer->peer_ref = copy_ref(ref); | |
1618 | dst_peer->force = pat->force; | |
1619 | free_name: | |
1620 | free(dst_name); | |
1621 | } | |
1622 | ||
1623 | string_list_clear(&dst_ref_index, 0); | |
1624 | ||
1625 | if (flags & MATCH_REFS_FOLLOW_TAGS) | |
1626 | add_missing_tags(src, dst, &dst_tail); | |
1627 | ||
1628 | if (send_prune) { | |
1629 | struct string_list src_ref_index = STRING_LIST_INIT_NODUP; | |
1630 | /* check for missing refs on the remote */ | |
1631 | for (ref = *dst; ref; ref = ref->next) { | |
1632 | char *src_name; | |
1633 | ||
1634 | if (ref->peer_ref) | |
1635 | /* We're already sending something to this ref. */ | |
1636 | continue; | |
1637 | ||
1638 | src_name = get_ref_match(rs, ref, send_mirror, FROM_DST, NULL); | |
1639 | if (src_name) { | |
1640 | if (!src_ref_index.nr) | |
1641 | prepare_ref_index(&src_ref_index, src); | |
1642 | if (!string_list_has_string(&src_ref_index, | |
1643 | src_name)) | |
1644 | ref->peer_ref = alloc_delete_ref(); | |
1645 | free(src_name); | |
1646 | } | |
1647 | } | |
1648 | string_list_clear(&src_ref_index, 0); | |
1649 | } | |
1650 | ||
1651 | *dst = apply_negative_refspecs(*dst, rs); | |
1652 | ||
1653 | if (errs) | |
1654 | return -1; | |
1655 | return 0; | |
1656 | } | |
1657 | ||
1658 | void set_ref_status_for_push(struct ref *remote_refs, int send_mirror, | |
1659 | int force_update) | |
1660 | { | |
1661 | struct ref *ref; | |
1662 | ||
1663 | for (ref = remote_refs; ref; ref = ref->next) { | |
1664 | int force_ref_update = ref->force || force_update; | |
1665 | int reject_reason = 0; | |
1666 | ||
1667 | if (ref->peer_ref) | |
1668 | oidcpy(&ref->new_oid, &ref->peer_ref->new_oid); | |
1669 | else if (!send_mirror) | |
1670 | continue; | |
1671 | ||
1672 | ref->deletion = is_null_oid(&ref->new_oid); | |
1673 | if (!ref->deletion && | |
1674 | oideq(&ref->old_oid, &ref->new_oid)) { | |
1675 | ref->status = REF_STATUS_UPTODATE; | |
1676 | continue; | |
1677 | } | |
1678 | ||
1679 | /* | |
1680 | * If the remote ref has moved and is now different | |
1681 | * from what we expect, reject any push. | |
1682 | * | |
1683 | * It also is an error if the user told us to check | |
1684 | * with the remote-tracking branch to find the value | |
1685 | * to expect, but we did not have such a tracking | |
1686 | * branch. | |
1687 | * | |
1688 | * If the tip of the remote-tracking ref is unreachable | |
1689 | * from any reflog entry of its local ref indicating a | |
1690 | * possible update since checkout; reject the push. | |
1691 | */ | |
1692 | if (ref->expect_old_sha1) { | |
1693 | if (!oideq(&ref->old_oid, &ref->old_oid_expect)) | |
1694 | reject_reason = REF_STATUS_REJECT_STALE; | |
1695 | else if (ref->check_reachable && ref->unreachable) | |
1696 | reject_reason = | |
1697 | REF_STATUS_REJECT_REMOTE_UPDATED; | |
1698 | else | |
1699 | /* | |
1700 | * If the ref isn't stale, and is reachable | |
1701 | * from one of the reflog entries of | |
1702 | * the local branch, force the update. | |
1703 | */ | |
1704 | force_ref_update = 1; | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * If the update isn't already rejected then check | |
1709 | * the usual "must fast-forward" rules. | |
1710 | * | |
1711 | * Decide whether an individual refspec A:B can be | |
1712 | * pushed. The push will succeed if any of the | |
1713 | * following are true: | |
1714 | * | |
1715 | * (1) the remote reference B does not exist | |
1716 | * | |
1717 | * (2) the remote reference B is being removed (i.e., | |
1718 | * pushing :B where no source is specified) | |
1719 | * | |
1720 | * (3) the destination is not under refs/tags/, and | |
1721 | * if the old and new value is a commit, the new | |
1722 | * is a descendant of the old. | |
1723 | * | |
1724 | * (4) it is forced using the +A:B notation, or by | |
1725 | * passing the --force argument | |
1726 | */ | |
1727 | ||
1728 | if (!reject_reason && !ref->deletion && !is_null_oid(&ref->old_oid)) { | |
1729 | if (starts_with(ref->name, "refs/tags/")) | |
1730 | reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS; | |
1731 | else if (!has_object_file(&ref->old_oid)) | |
1732 | reject_reason = REF_STATUS_REJECT_FETCH_FIRST; | |
1733 | else if (!lookup_commit_reference_gently(the_repository, &ref->old_oid, 1) || | |
1734 | !lookup_commit_reference_gently(the_repository, &ref->new_oid, 1)) | |
1735 | reject_reason = REF_STATUS_REJECT_NEEDS_FORCE; | |
1736 | else if (!ref_newer(&ref->new_oid, &ref->old_oid)) | |
1737 | reject_reason = REF_STATUS_REJECT_NONFASTFORWARD; | |
1738 | } | |
1739 | ||
1740 | /* | |
1741 | * "--force" will defeat any rejection implemented | |
1742 | * by the rules above. | |
1743 | */ | |
1744 | if (!force_ref_update) | |
1745 | ref->status = reject_reason; | |
1746 | else if (reject_reason) | |
1747 | ref->forced_update = 1; | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | static void set_merge(struct remote_state *remote_state, struct branch *ret) | |
1752 | { | |
1753 | struct remote *remote; | |
1754 | char *ref; | |
1755 | struct object_id oid; | |
1756 | int i; | |
1757 | ||
1758 | if (!ret) | |
1759 | return; /* no branch */ | |
1760 | if (ret->merge) | |
1761 | return; /* already run */ | |
1762 | if (!ret->remote_name || !ret->merge_nr) { | |
1763 | /* | |
1764 | * no merge config; let's make sure we don't confuse callers | |
1765 | * with a non-zero merge_nr but a NULL merge | |
1766 | */ | |
1767 | ret->merge_nr = 0; | |
1768 | return; | |
1769 | } | |
1770 | ||
1771 | remote = remotes_remote_get(remote_state, ret->remote_name); | |
1772 | ||
1773 | CALLOC_ARRAY(ret->merge, ret->merge_nr); | |
1774 | for (i = 0; i < ret->merge_nr; i++) { | |
1775 | ret->merge[i] = xcalloc(1, sizeof(**ret->merge)); | |
1776 | ret->merge[i]->src = xstrdup(ret->merge_name[i]); | |
1777 | if (!remote_find_tracking(remote, ret->merge[i]) || | |
1778 | strcmp(ret->remote_name, ".")) | |
1779 | continue; | |
1780 | if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]), | |
1781 | &oid, &ref, 0) == 1) | |
1782 | ret->merge[i]->dst = ref; | |
1783 | else | |
1784 | ret->merge[i]->dst = xstrdup(ret->merge_name[i]); | |
1785 | } | |
1786 | } | |
1787 | ||
1788 | struct branch *branch_get(const char *name) | |
1789 | { | |
1790 | struct branch *ret; | |
1791 | ||
1792 | read_config(the_repository); | |
1793 | if (!name || !*name || !strcmp(name, "HEAD")) | |
1794 | ret = the_repository->remote_state->current_branch; | |
1795 | else | |
1796 | ret = make_branch(the_repository->remote_state, name, | |
1797 | strlen(name)); | |
1798 | set_merge(the_repository->remote_state, ret); | |
1799 | return ret; | |
1800 | } | |
1801 | ||
1802 | int branch_has_merge_config(struct branch *branch) | |
1803 | { | |
1804 | return branch && !!branch->merge; | |
1805 | } | |
1806 | ||
1807 | int branch_merge_matches(struct branch *branch, | |
1808 | int i, | |
1809 | const char *refname) | |
1810 | { | |
1811 | if (!branch || i < 0 || i >= branch->merge_nr) | |
1812 | return 0; | |
1813 | return refname_match(branch->merge[i]->src, refname); | |
1814 | } | |
1815 | ||
1816 | __attribute__((format (printf,2,3))) | |
1817 | static const char *error_buf(struct strbuf *err, const char *fmt, ...) | |
1818 | { | |
1819 | if (err) { | |
1820 | va_list ap; | |
1821 | va_start(ap, fmt); | |
1822 | strbuf_vaddf(err, fmt, ap); | |
1823 | va_end(ap); | |
1824 | } | |
1825 | return NULL; | |
1826 | } | |
1827 | ||
1828 | const char *branch_get_upstream(struct branch *branch, struct strbuf *err) | |
1829 | { | |
1830 | if (!branch) | |
1831 | return error_buf(err, _("HEAD does not point to a branch")); | |
1832 | ||
1833 | if (!branch->merge || !branch->merge[0]) { | |
1834 | /* | |
1835 | * no merge config; is it because the user didn't define any, | |
1836 | * or because it is not a real branch, and get_branch | |
1837 | * auto-vivified it? | |
1838 | */ | |
1839 | if (!ref_exists(branch->refname)) | |
1840 | return error_buf(err, _("no such branch: '%s'"), | |
1841 | branch->name); | |
1842 | return error_buf(err, | |
1843 | _("no upstream configured for branch '%s'"), | |
1844 | branch->name); | |
1845 | } | |
1846 | ||
1847 | if (!branch->merge[0]->dst) | |
1848 | return error_buf(err, | |
1849 | _("upstream branch '%s' not stored as a remote-tracking branch"), | |
1850 | branch->merge[0]->src); | |
1851 | ||
1852 | return branch->merge[0]->dst; | |
1853 | } | |
1854 | ||
1855 | static const char *tracking_for_push_dest(struct remote *remote, | |
1856 | const char *refname, | |
1857 | struct strbuf *err) | |
1858 | { | |
1859 | char *ret; | |
1860 | ||
1861 | ret = apply_refspecs(&remote->fetch, refname); | |
1862 | if (!ret) | |
1863 | return error_buf(err, | |
1864 | _("push destination '%s' on remote '%s' has no local tracking branch"), | |
1865 | refname, remote->name); | |
1866 | return ret; | |
1867 | } | |
1868 | ||
1869 | static const char *branch_get_push_1(struct remote_state *remote_state, | |
1870 | struct branch *branch, struct strbuf *err) | |
1871 | { | |
1872 | struct remote *remote; | |
1873 | ||
1874 | remote = remotes_remote_get( | |
1875 | remote_state, | |
1876 | remotes_pushremote_for_branch(remote_state, branch, NULL)); | |
1877 | if (!remote) | |
1878 | return error_buf(err, | |
1879 | _("branch '%s' has no remote for pushing"), | |
1880 | branch->name); | |
1881 | ||
1882 | if (remote->push.nr) { | |
1883 | char *dst; | |
1884 | const char *ret; | |
1885 | ||
1886 | dst = apply_refspecs(&remote->push, branch->refname); | |
1887 | if (!dst) | |
1888 | return error_buf(err, | |
1889 | _("push refspecs for '%s' do not include '%s'"), | |
1890 | remote->name, branch->name); | |
1891 | ||
1892 | ret = tracking_for_push_dest(remote, dst, err); | |
1893 | free(dst); | |
1894 | return ret; | |
1895 | } | |
1896 | ||
1897 | if (remote->mirror) | |
1898 | return tracking_for_push_dest(remote, branch->refname, err); | |
1899 | ||
1900 | switch (push_default) { | |
1901 | case PUSH_DEFAULT_NOTHING: | |
1902 | return error_buf(err, _("push has no destination (push.default is 'nothing')")); | |
1903 | ||
1904 | case PUSH_DEFAULT_MATCHING: | |
1905 | case PUSH_DEFAULT_CURRENT: | |
1906 | return tracking_for_push_dest(remote, branch->refname, err); | |
1907 | ||
1908 | case PUSH_DEFAULT_UPSTREAM: | |
1909 | return branch_get_upstream(branch, err); | |
1910 | ||
1911 | case PUSH_DEFAULT_UNSPECIFIED: | |
1912 | case PUSH_DEFAULT_SIMPLE: | |
1913 | { | |
1914 | const char *up, *cur; | |
1915 | ||
1916 | up = branch_get_upstream(branch, err); | |
1917 | if (!up) | |
1918 | return NULL; | |
1919 | cur = tracking_for_push_dest(remote, branch->refname, err); | |
1920 | if (!cur) | |
1921 | return NULL; | |
1922 | if (strcmp(cur, up)) | |
1923 | return error_buf(err, | |
1924 | _("cannot resolve 'simple' push to a single destination")); | |
1925 | return cur; | |
1926 | } | |
1927 | } | |
1928 | ||
1929 | BUG("unhandled push situation"); | |
1930 | } | |
1931 | ||
1932 | const char *branch_get_push(struct branch *branch, struct strbuf *err) | |
1933 | { | |
1934 | read_config(the_repository); | |
1935 | die_on_missing_branch(the_repository, branch); | |
1936 | ||
1937 | if (!branch) | |
1938 | return error_buf(err, _("HEAD does not point to a branch")); | |
1939 | ||
1940 | if (!branch->push_tracking_ref) | |
1941 | branch->push_tracking_ref = branch_get_push_1( | |
1942 | the_repository->remote_state, branch, err); | |
1943 | return branch->push_tracking_ref; | |
1944 | } | |
1945 | ||
1946 | static int ignore_symref_update(const char *refname, struct strbuf *scratch) | |
1947 | { | |
1948 | return !refs_read_symbolic_ref(get_main_ref_store(the_repository), refname, scratch); | |
1949 | } | |
1950 | ||
1951 | /* | |
1952 | * Create and return a list of (struct ref) consisting of copies of | |
1953 | * each remote_ref that matches refspec. refspec must be a pattern. | |
1954 | * Fill in the copies' peer_ref to describe the local tracking refs to | |
1955 | * which they map. Omit any references that would map to an existing | |
1956 | * local symbolic ref. | |
1957 | */ | |
1958 | static struct ref *get_expanded_map(const struct ref *remote_refs, | |
1959 | const struct refspec_item *refspec) | |
1960 | { | |
1961 | struct strbuf scratch = STRBUF_INIT; | |
1962 | const struct ref *ref; | |
1963 | struct ref *ret = NULL; | |
1964 | struct ref **tail = &ret; | |
1965 | ||
1966 | for (ref = remote_refs; ref; ref = ref->next) { | |
1967 | char *expn_name = NULL; | |
1968 | ||
1969 | strbuf_reset(&scratch); | |
1970 | ||
1971 | if (strchr(ref->name, '^')) | |
1972 | continue; /* a dereference item */ | |
1973 | if (match_name_with_pattern(refspec->src, ref->name, | |
1974 | refspec->dst, &expn_name) && | |
1975 | !ignore_symref_update(expn_name, &scratch)) { | |
1976 | struct ref *cpy = copy_ref(ref); | |
1977 | ||
1978 | cpy->peer_ref = alloc_ref(expn_name); | |
1979 | if (refspec->force) | |
1980 | cpy->peer_ref->force = 1; | |
1981 | *tail = cpy; | |
1982 | tail = &cpy->next; | |
1983 | } | |
1984 | free(expn_name); | |
1985 | } | |
1986 | ||
1987 | strbuf_release(&scratch); | |
1988 | return ret; | |
1989 | } | |
1990 | ||
1991 | static const struct ref *find_ref_by_name_abbrev(const struct ref *refs, const char *name) | |
1992 | { | |
1993 | const struct ref *ref; | |
1994 | const struct ref *best_match = NULL; | |
1995 | int best_score = 0; | |
1996 | ||
1997 | for (ref = refs; ref; ref = ref->next) { | |
1998 | int score = refname_match(name, ref->name); | |
1999 | ||
2000 | if (best_score < score) { | |
2001 | best_match = ref; | |
2002 | best_score = score; | |
2003 | } | |
2004 | } | |
2005 | return best_match; | |
2006 | } | |
2007 | ||
2008 | struct ref *get_remote_ref(const struct ref *remote_refs, const char *name) | |
2009 | { | |
2010 | const struct ref *ref = find_ref_by_name_abbrev(remote_refs, name); | |
2011 | ||
2012 | if (!ref) | |
2013 | return NULL; | |
2014 | ||
2015 | return copy_ref(ref); | |
2016 | } | |
2017 | ||
2018 | static struct ref *get_local_ref(const char *name) | |
2019 | { | |
2020 | if (!name || name[0] == '\0') | |
2021 | return NULL; | |
2022 | ||
2023 | if (starts_with(name, "refs/")) | |
2024 | return alloc_ref(name); | |
2025 | ||
2026 | if (starts_with(name, "heads/") || | |
2027 | starts_with(name, "tags/") || | |
2028 | starts_with(name, "remotes/")) | |
2029 | return alloc_ref_with_prefix("refs/", 5, name); | |
2030 | ||
2031 | return alloc_ref_with_prefix("refs/heads/", 11, name); | |
2032 | } | |
2033 | ||
2034 | int get_fetch_map(const struct ref *remote_refs, | |
2035 | const struct refspec_item *refspec, | |
2036 | struct ref ***tail, | |
2037 | int missing_ok) | |
2038 | { | |
2039 | struct ref *ref_map, **rmp; | |
2040 | ||
2041 | if (refspec->negative) | |
2042 | return 0; | |
2043 | ||
2044 | if (refspec->pattern) { | |
2045 | ref_map = get_expanded_map(remote_refs, refspec); | |
2046 | } else { | |
2047 | const char *name = refspec->src[0] ? refspec->src : "HEAD"; | |
2048 | ||
2049 | if (refspec->exact_sha1) { | |
2050 | ref_map = alloc_ref(name); | |
2051 | get_oid_hex(name, &ref_map->old_oid); | |
2052 | ref_map->exact_oid = 1; | |
2053 | } else { | |
2054 | ref_map = get_remote_ref(remote_refs, name); | |
2055 | } | |
2056 | if (!missing_ok && !ref_map) | |
2057 | die(_("couldn't find remote ref %s"), name); | |
2058 | if (ref_map) { | |
2059 | ref_map->peer_ref = get_local_ref(refspec->dst); | |
2060 | if (ref_map->peer_ref && refspec->force) | |
2061 | ref_map->peer_ref->force = 1; | |
2062 | } | |
2063 | } | |
2064 | ||
2065 | for (rmp = &ref_map; *rmp; ) { | |
2066 | if ((*rmp)->peer_ref) { | |
2067 | if (!starts_with((*rmp)->peer_ref->name, "refs/") || | |
2068 | check_refname_format((*rmp)->peer_ref->name, 0)) { | |
2069 | struct ref *ignore = *rmp; | |
2070 | error(_("* Ignoring funny ref '%s' locally"), | |
2071 | (*rmp)->peer_ref->name); | |
2072 | *rmp = (*rmp)->next; | |
2073 | free(ignore->peer_ref); | |
2074 | free(ignore); | |
2075 | continue; | |
2076 | } | |
2077 | } | |
2078 | rmp = &((*rmp)->next); | |
2079 | } | |
2080 | ||
2081 | if (ref_map) | |
2082 | tail_link_ref(ref_map, tail); | |
2083 | ||
2084 | return 0; | |
2085 | } | |
2086 | ||
2087 | int resolve_remote_symref(struct ref *ref, struct ref *list) | |
2088 | { | |
2089 | if (!ref->symref) | |
2090 | return 0; | |
2091 | for (; list; list = list->next) | |
2092 | if (!strcmp(ref->symref, list->name)) { | |
2093 | oidcpy(&ref->old_oid, &list->old_oid); | |
2094 | return 0; | |
2095 | } | |
2096 | return 1; | |
2097 | } | |
2098 | ||
2099 | /* | |
2100 | * Compute the commit ahead/behind values for the pair branch_name, base. | |
2101 | * | |
2102 | * If abf is AHEAD_BEHIND_FULL, compute the full ahead/behind and return the | |
2103 | * counts in *num_ours and *num_theirs. If abf is AHEAD_BEHIND_QUICK, skip | |
2104 | * the (potentially expensive) a/b computation (*num_ours and *num_theirs are | |
2105 | * set to zero). | |
2106 | * | |
2107 | * Returns -1 if num_ours and num_theirs could not be filled in (e.g., ref | |
2108 | * does not exist). Returns 0 if the commits are identical. Returns 1 if | |
2109 | * commits are different. | |
2110 | */ | |
2111 | ||
2112 | static int stat_branch_pair(const char *branch_name, const char *base, | |
2113 | int *num_ours, int *num_theirs, | |
2114 | enum ahead_behind_flags abf) | |
2115 | { | |
2116 | struct object_id oid; | |
2117 | struct commit *ours, *theirs; | |
2118 | struct rev_info revs; | |
2119 | struct strvec argv = STRVEC_INIT; | |
2120 | ||
2121 | /* Cannot stat if what we used to build on no longer exists */ | |
2122 | if (read_ref(base, &oid)) | |
2123 | return -1; | |
2124 | theirs = lookup_commit_reference(the_repository, &oid); | |
2125 | if (!theirs) | |
2126 | return -1; | |
2127 | ||
2128 | if (read_ref(branch_name, &oid)) | |
2129 | return -1; | |
2130 | ours = lookup_commit_reference(the_repository, &oid); | |
2131 | if (!ours) | |
2132 | return -1; | |
2133 | ||
2134 | *num_theirs = *num_ours = 0; | |
2135 | ||
2136 | /* are we the same? */ | |
2137 | if (theirs == ours) | |
2138 | return 0; | |
2139 | if (abf == AHEAD_BEHIND_QUICK) | |
2140 | return 1; | |
2141 | if (abf != AHEAD_BEHIND_FULL) | |
2142 | BUG("stat_branch_pair: invalid abf '%d'", abf); | |
2143 | ||
2144 | /* Run "rev-list --left-right ours...theirs" internally... */ | |
2145 | strvec_push(&argv, ""); /* ignored */ | |
2146 | strvec_push(&argv, "--left-right"); | |
2147 | strvec_pushf(&argv, "%s...%s", | |
2148 | oid_to_hex(&ours->object.oid), | |
2149 | oid_to_hex(&theirs->object.oid)); | |
2150 | strvec_push(&argv, "--"); | |
2151 | ||
2152 | repo_init_revisions(the_repository, &revs, NULL); | |
2153 | setup_revisions(argv.nr, argv.v, &revs, NULL); | |
2154 | if (prepare_revision_walk(&revs)) | |
2155 | die(_("revision walk setup failed")); | |
2156 | ||
2157 | /* ... and count the commits on each side. */ | |
2158 | while (1) { | |
2159 | struct commit *c = get_revision(&revs); | |
2160 | if (!c) | |
2161 | break; | |
2162 | if (c->object.flags & SYMMETRIC_LEFT) | |
2163 | (*num_ours)++; | |
2164 | else | |
2165 | (*num_theirs)++; | |
2166 | } | |
2167 | ||
2168 | /* clear object flags smudged by the above traversal */ | |
2169 | clear_commit_marks(ours, ALL_REV_FLAGS); | |
2170 | clear_commit_marks(theirs, ALL_REV_FLAGS); | |
2171 | ||
2172 | strvec_clear(&argv); | |
2173 | return 1; | |
2174 | } | |
2175 | ||
2176 | /* | |
2177 | * Lookup the tracking branch for the given branch and if present, optionally | |
2178 | * compute the commit ahead/behind values for the pair. | |
2179 | * | |
2180 | * If for_push is true, the tracking branch refers to the push branch, | |
2181 | * otherwise it refers to the upstream branch. | |
2182 | * | |
2183 | * The name of the tracking branch (or NULL if it is not defined) is | |
2184 | * returned via *tracking_name, if it is not itself NULL. | |
2185 | * | |
2186 | * If abf is AHEAD_BEHIND_FULL, compute the full ahead/behind and return the | |
2187 | * counts in *num_ours and *num_theirs. If abf is AHEAD_BEHIND_QUICK, skip | |
2188 | * the (potentially expensive) a/b computation (*num_ours and *num_theirs are | |
2189 | * set to zero). | |
2190 | * | |
2191 | * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no | |
2192 | * upstream defined, or ref does not exist). Returns 0 if the commits are | |
2193 | * identical. Returns 1 if commits are different. | |
2194 | */ | |
2195 | int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs, | |
2196 | const char **tracking_name, int for_push, | |
2197 | enum ahead_behind_flags abf) | |
2198 | { | |
2199 | const char *base; | |
2200 | ||
2201 | /* Cannot stat unless we are marked to build on top of somebody else. */ | |
2202 | base = for_push ? branch_get_push(branch, NULL) : | |
2203 | branch_get_upstream(branch, NULL); | |
2204 | if (tracking_name) | |
2205 | *tracking_name = base; | |
2206 | if (!base) | |
2207 | return -1; | |
2208 | ||
2209 | return stat_branch_pair(branch->refname, base, num_ours, num_theirs, abf); | |
2210 | } | |
2211 | ||
2212 | /* | |
2213 | * Return true when there is anything to report, otherwise false. | |
2214 | */ | |
2215 | int format_tracking_info(struct branch *branch, struct strbuf *sb, | |
2216 | enum ahead_behind_flags abf) | |
2217 | { | |
2218 | int ours, theirs, sti; | |
2219 | const char *full_base; | |
2220 | char *base; | |
2221 | int upstream_is_gone = 0; | |
2222 | ||
2223 | sti = stat_tracking_info(branch, &ours, &theirs, &full_base, 0, abf); | |
2224 | if (sti < 0) { | |
2225 | if (!full_base) | |
2226 | return 0; | |
2227 | upstream_is_gone = 1; | |
2228 | } | |
2229 | ||
2230 | base = shorten_unambiguous_ref(full_base, 0); | |
2231 | if (upstream_is_gone) { | |
2232 | strbuf_addf(sb, | |
2233 | _("Your branch is based on '%s', but the upstream is gone.\n"), | |
2234 | base); | |
2235 | if (advice_enabled(ADVICE_STATUS_HINTS)) | |
2236 | strbuf_addstr(sb, | |
2237 | _(" (use \"git branch --unset-upstream\" to fixup)\n")); | |
2238 | } else if (!sti) { | |
2239 | strbuf_addf(sb, | |
2240 | _("Your branch is up to date with '%s'.\n"), | |
2241 | base); | |
2242 | } else if (abf == AHEAD_BEHIND_QUICK) { | |
2243 | strbuf_addf(sb, | |
2244 | _("Your branch and '%s' refer to different commits.\n"), | |
2245 | base); | |
2246 | if (advice_enabled(ADVICE_STATUS_HINTS)) | |
2247 | strbuf_addf(sb, _(" (use \"%s\" for details)\n"), | |
2248 | "git status --ahead-behind"); | |
2249 | } else if (!theirs) { | |
2250 | strbuf_addf(sb, | |
2251 | Q_("Your branch is ahead of '%s' by %d commit.\n", | |
2252 | "Your branch is ahead of '%s' by %d commits.\n", | |
2253 | ours), | |
2254 | base, ours); | |
2255 | if (advice_enabled(ADVICE_STATUS_HINTS)) | |
2256 | strbuf_addstr(sb, | |
2257 | _(" (use \"git push\" to publish your local commits)\n")); | |
2258 | } else if (!ours) { | |
2259 | strbuf_addf(sb, | |
2260 | Q_("Your branch is behind '%s' by %d commit, " | |
2261 | "and can be fast-forwarded.\n", | |
2262 | "Your branch is behind '%s' by %d commits, " | |
2263 | "and can be fast-forwarded.\n", | |
2264 | theirs), | |
2265 | base, theirs); | |
2266 | if (advice_enabled(ADVICE_STATUS_HINTS)) | |
2267 | strbuf_addstr(sb, | |
2268 | _(" (use \"git pull\" to update your local branch)\n")); | |
2269 | } else { | |
2270 | strbuf_addf(sb, | |
2271 | Q_("Your branch and '%s' have diverged,\n" | |
2272 | "and have %d and %d different commit each, " | |
2273 | "respectively.\n", | |
2274 | "Your branch and '%s' have diverged,\n" | |
2275 | "and have %d and %d different commits each, " | |
2276 | "respectively.\n", | |
2277 | ours + theirs), | |
2278 | base, ours, theirs); | |
2279 | if (advice_enabled(ADVICE_STATUS_HINTS)) | |
2280 | strbuf_addstr(sb, | |
2281 | _(" (use \"git pull\" to merge the remote branch into yours)\n")); | |
2282 | } | |
2283 | free(base); | |
2284 | return 1; | |
2285 | } | |
2286 | ||
2287 | static int one_local_ref(const char *refname, const struct object_id *oid, | |
2288 | int flag, void *cb_data) | |
2289 | { | |
2290 | struct ref ***local_tail = cb_data; | |
2291 | struct ref *ref; | |
2292 | ||
2293 | /* we already know it starts with refs/ to get here */ | |
2294 | if (check_refname_format(refname + 5, 0)) | |
2295 | return 0; | |
2296 | ||
2297 | ref = alloc_ref(refname); | |
2298 | oidcpy(&ref->new_oid, oid); | |
2299 | **local_tail = ref; | |
2300 | *local_tail = &ref->next; | |
2301 | return 0; | |
2302 | } | |
2303 | ||
2304 | struct ref *get_local_heads(void) | |
2305 | { | |
2306 | struct ref *local_refs = NULL, **local_tail = &local_refs; | |
2307 | ||
2308 | for_each_ref(one_local_ref, &local_tail); | |
2309 | return local_refs; | |
2310 | } | |
2311 | ||
2312 | struct ref *guess_remote_head(const struct ref *head, | |
2313 | const struct ref *refs, | |
2314 | int all) | |
2315 | { | |
2316 | const struct ref *r; | |
2317 | struct ref *list = NULL; | |
2318 | struct ref **tail = &list; | |
2319 | ||
2320 | if (!head) | |
2321 | return NULL; | |
2322 | ||
2323 | /* | |
2324 | * Some transports support directly peeking at | |
2325 | * where HEAD points; if that is the case, then | |
2326 | * we don't have to guess. | |
2327 | */ | |
2328 | if (head->symref) | |
2329 | return copy_ref(find_ref_by_name(refs, head->symref)); | |
2330 | ||
2331 | /* If a remote branch exists with the default branch name, let's use it. */ | |
2332 | if (!all) { | |
2333 | char *ref = xstrfmt("refs/heads/%s", | |
2334 | git_default_branch_name(0)); | |
2335 | ||
2336 | r = find_ref_by_name(refs, ref); | |
2337 | free(ref); | |
2338 | if (r && oideq(&r->old_oid, &head->old_oid)) | |
2339 | return copy_ref(r); | |
2340 | ||
2341 | /* Fall back to the hard-coded historical default */ | |
2342 | r = find_ref_by_name(refs, "refs/heads/master"); | |
2343 | if (r && oideq(&r->old_oid, &head->old_oid)) | |
2344 | return copy_ref(r); | |
2345 | } | |
2346 | ||
2347 | /* Look for another ref that points there */ | |
2348 | for (r = refs; r; r = r->next) { | |
2349 | if (r != head && | |
2350 | starts_with(r->name, "refs/heads/") && | |
2351 | oideq(&r->old_oid, &head->old_oid)) { | |
2352 | *tail = copy_ref(r); | |
2353 | tail = &((*tail)->next); | |
2354 | if (!all) | |
2355 | break; | |
2356 | } | |
2357 | } | |
2358 | ||
2359 | return list; | |
2360 | } | |
2361 | ||
2362 | struct stale_heads_info { | |
2363 | struct string_list *ref_names; | |
2364 | struct ref **stale_refs_tail; | |
2365 | struct refspec *rs; | |
2366 | }; | |
2367 | ||
2368 | static int get_stale_heads_cb(const char *refname, const struct object_id *oid, | |
2369 | int flags, void *cb_data) | |
2370 | { | |
2371 | struct stale_heads_info *info = cb_data; | |
2372 | struct string_list matches = STRING_LIST_INIT_DUP; | |
2373 | struct refspec_item query; | |
2374 | int i, stale = 1; | |
2375 | memset(&query, 0, sizeof(struct refspec_item)); | |
2376 | query.dst = (char *)refname; | |
2377 | ||
2378 | query_refspecs_multiple(info->rs, &query, &matches); | |
2379 | if (matches.nr == 0) | |
2380 | goto clean_exit; /* No matches */ | |
2381 | ||
2382 | /* | |
2383 | * If we did find a suitable refspec and it's not a symref and | |
2384 | * it's not in the list of refs that currently exist in that | |
2385 | * remote, we consider it to be stale. In order to deal with | |
2386 | * overlapping refspecs, we need to go over all of the | |
2387 | * matching refs. | |
2388 | */ | |
2389 | if (flags & REF_ISSYMREF) | |
2390 | goto clean_exit; | |
2391 | ||
2392 | for (i = 0; stale && i < matches.nr; i++) | |
2393 | if (string_list_has_string(info->ref_names, matches.items[i].string)) | |
2394 | stale = 0; | |
2395 | ||
2396 | if (stale) { | |
2397 | struct ref *ref = make_linked_ref(refname, &info->stale_refs_tail); | |
2398 | oidcpy(&ref->new_oid, oid); | |
2399 | } | |
2400 | ||
2401 | clean_exit: | |
2402 | string_list_clear(&matches, 0); | |
2403 | return 0; | |
2404 | } | |
2405 | ||
2406 | struct ref *get_stale_heads(struct refspec *rs, struct ref *fetch_map) | |
2407 | { | |
2408 | struct ref *ref, *stale_refs = NULL; | |
2409 | struct string_list ref_names = STRING_LIST_INIT_NODUP; | |
2410 | struct stale_heads_info info; | |
2411 | ||
2412 | info.ref_names = &ref_names; | |
2413 | info.stale_refs_tail = &stale_refs; | |
2414 | info.rs = rs; | |
2415 | for (ref = fetch_map; ref; ref = ref->next) | |
2416 | string_list_append(&ref_names, ref->name); | |
2417 | string_list_sort(&ref_names); | |
2418 | for_each_ref(get_stale_heads_cb, &info); | |
2419 | string_list_clear(&ref_names, 0); | |
2420 | return stale_refs; | |
2421 | } | |
2422 | ||
2423 | /* | |
2424 | * Compare-and-swap | |
2425 | */ | |
2426 | static void clear_cas_option(struct push_cas_option *cas) | |
2427 | { | |
2428 | int i; | |
2429 | ||
2430 | for (i = 0; i < cas->nr; i++) | |
2431 | free(cas->entry[i].refname); | |
2432 | free(cas->entry); | |
2433 | memset(cas, 0, sizeof(*cas)); | |
2434 | } | |
2435 | ||
2436 | static struct push_cas *add_cas_entry(struct push_cas_option *cas, | |
2437 | const char *refname, | |
2438 | size_t refnamelen) | |
2439 | { | |
2440 | struct push_cas *entry; | |
2441 | ALLOC_GROW(cas->entry, cas->nr + 1, cas->alloc); | |
2442 | entry = &cas->entry[cas->nr++]; | |
2443 | memset(entry, 0, sizeof(*entry)); | |
2444 | entry->refname = xmemdupz(refname, refnamelen); | |
2445 | return entry; | |
2446 | } | |
2447 | ||
2448 | static int parse_push_cas_option(struct push_cas_option *cas, const char *arg, int unset) | |
2449 | { | |
2450 | const char *colon; | |
2451 | struct push_cas *entry; | |
2452 | ||
2453 | if (unset) { | |
2454 | /* "--no-<option>" */ | |
2455 | clear_cas_option(cas); | |
2456 | return 0; | |
2457 | } | |
2458 | ||
2459 | if (!arg) { | |
2460 | /* just "--<option>" */ | |
2461 | cas->use_tracking_for_rest = 1; | |
2462 | return 0; | |
2463 | } | |
2464 | ||
2465 | /* "--<option>=refname" or "--<option>=refname:value" */ | |
2466 | colon = strchrnul(arg, ':'); | |
2467 | entry = add_cas_entry(cas, arg, colon - arg); | |
2468 | if (!*colon) | |
2469 | entry->use_tracking = 1; | |
2470 | else if (!colon[1]) | |
2471 | oidclr(&entry->expect); | |
2472 | else if (get_oid(colon + 1, &entry->expect)) | |
2473 | return error(_("cannot parse expected object name '%s'"), | |
2474 | colon + 1); | |
2475 | return 0; | |
2476 | } | |
2477 | ||
2478 | int parseopt_push_cas_option(const struct option *opt, const char *arg, int unset) | |
2479 | { | |
2480 | return parse_push_cas_option(opt->value, arg, unset); | |
2481 | } | |
2482 | ||
2483 | int is_empty_cas(const struct push_cas_option *cas) | |
2484 | { | |
2485 | return !cas->use_tracking_for_rest && !cas->nr; | |
2486 | } | |
2487 | ||
2488 | /* | |
2489 | * Look at remote.fetch refspec and see if we have a remote | |
2490 | * tracking branch for the refname there. Fill the name of | |
2491 | * the remote-tracking branch in *dst_refname, and the name | |
2492 | * of the commit object at its tip in oid[]. | |
2493 | * If we cannot do so, return negative to signal an error. | |
2494 | */ | |
2495 | static int remote_tracking(struct remote *remote, const char *refname, | |
2496 | struct object_id *oid, char **dst_refname) | |
2497 | { | |
2498 | char *dst; | |
2499 | ||
2500 | dst = apply_refspecs(&remote->fetch, refname); | |
2501 | if (!dst) | |
2502 | return -1; /* no tracking ref for refname at remote */ | |
2503 | if (read_ref(dst, oid)) | |
2504 | return -1; /* we know what the tracking ref is but we cannot read it */ | |
2505 | ||
2506 | *dst_refname = dst; | |
2507 | return 0; | |
2508 | } | |
2509 | ||
2510 | /* | |
2511 | * The struct "reflog_commit_array" and related helper functions | |
2512 | * are used for collecting commits into an array during reflog | |
2513 | * traversals in "check_and_collect_until()". | |
2514 | */ | |
2515 | struct reflog_commit_array { | |
2516 | struct commit **item; | |
2517 | size_t nr, alloc; | |
2518 | }; | |
2519 | ||
2520 | #define REFLOG_COMMIT_ARRAY_INIT { 0 } | |
2521 | ||
2522 | /* Append a commit to the array. */ | |
2523 | static void append_commit(struct reflog_commit_array *arr, | |
2524 | struct commit *commit) | |
2525 | { | |
2526 | ALLOC_GROW(arr->item, arr->nr + 1, arr->alloc); | |
2527 | arr->item[arr->nr++] = commit; | |
2528 | } | |
2529 | ||
2530 | /* Free and reset the array. */ | |
2531 | static void free_commit_array(struct reflog_commit_array *arr) | |
2532 | { | |
2533 | FREE_AND_NULL(arr->item); | |
2534 | arr->nr = arr->alloc = 0; | |
2535 | } | |
2536 | ||
2537 | struct check_and_collect_until_cb_data { | |
2538 | struct commit *remote_commit; | |
2539 | struct reflog_commit_array *local_commits; | |
2540 | timestamp_t remote_reflog_timestamp; | |
2541 | }; | |
2542 | ||
2543 | /* Get the timestamp of the latest entry. */ | |
2544 | static int peek_reflog(struct object_id *o_oid, struct object_id *n_oid, | |
2545 | const char *ident, timestamp_t timestamp, | |
2546 | int tz, const char *message, void *cb_data) | |
2547 | { | |
2548 | timestamp_t *ts = cb_data; | |
2549 | *ts = timestamp; | |
2550 | return 1; | |
2551 | } | |
2552 | ||
2553 | static int check_and_collect_until(struct object_id *o_oid, | |
2554 | struct object_id *n_oid, | |
2555 | const char *ident, timestamp_t timestamp, | |
2556 | int tz, const char *message, void *cb_data) | |
2557 | { | |
2558 | struct commit *commit; | |
2559 | struct check_and_collect_until_cb_data *cb = cb_data; | |
2560 | ||
2561 | /* An entry was found. */ | |
2562 | if (oideq(n_oid, &cb->remote_commit->object.oid)) | |
2563 | return 1; | |
2564 | ||
2565 | if ((commit = lookup_commit_reference(the_repository, n_oid))) | |
2566 | append_commit(cb->local_commits, commit); | |
2567 | ||
2568 | /* | |
2569 | * If the reflog entry timestamp is older than the remote ref's | |
2570 | * latest reflog entry, there is no need to check or collect | |
2571 | * entries older than this one. | |
2572 | */ | |
2573 | if (timestamp < cb->remote_reflog_timestamp) | |
2574 | return -1; | |
2575 | ||
2576 | return 0; | |
2577 | } | |
2578 | ||
2579 | #define MERGE_BASES_BATCH_SIZE 8 | |
2580 | ||
2581 | /* | |
2582 | * Iterate through the reflog of the local ref to check if there is an entry | |
2583 | * for the given remote-tracking ref; runs until the timestamp of an entry is | |
2584 | * older than latest timestamp of remote-tracking ref's reflog. Any commits | |
2585 | * are that seen along the way are collected into an array to check if the | |
2586 | * remote-tracking ref is reachable from any of them. | |
2587 | */ | |
2588 | static int is_reachable_in_reflog(const char *local, const struct ref *remote) | |
2589 | { | |
2590 | timestamp_t date; | |
2591 | struct commit *commit; | |
2592 | struct commit **chunk; | |
2593 | struct check_and_collect_until_cb_data cb; | |
2594 | struct reflog_commit_array arr = REFLOG_COMMIT_ARRAY_INIT; | |
2595 | size_t size = 0; | |
2596 | int ret = 0; | |
2597 | ||
2598 | commit = lookup_commit_reference(the_repository, &remote->old_oid); | |
2599 | if (!commit) | |
2600 | goto cleanup_return; | |
2601 | ||
2602 | /* | |
2603 | * Get the timestamp from the latest entry | |
2604 | * of the remote-tracking ref's reflog. | |
2605 | */ | |
2606 | for_each_reflog_ent_reverse(remote->tracking_ref, peek_reflog, &date); | |
2607 | ||
2608 | cb.remote_commit = commit; | |
2609 | cb.local_commits = &arr; | |
2610 | cb.remote_reflog_timestamp = date; | |
2611 | ret = for_each_reflog_ent_reverse(local, check_and_collect_until, &cb); | |
2612 | ||
2613 | /* We found an entry in the reflog. */ | |
2614 | if (ret > 0) | |
2615 | goto cleanup_return; | |
2616 | ||
2617 | /* | |
2618 | * Check if the remote commit is reachable from any | |
2619 | * of the commits in the collected array, in batches. | |
2620 | */ | |
2621 | for (chunk = arr.item; chunk < arr.item + arr.nr; chunk += size) { | |
2622 | size = arr.item + arr.nr - chunk; | |
2623 | if (MERGE_BASES_BATCH_SIZE < size) | |
2624 | size = MERGE_BASES_BATCH_SIZE; | |
2625 | ||
2626 | if ((ret = in_merge_bases_many(commit, size, chunk))) | |
2627 | break; | |
2628 | } | |
2629 | ||
2630 | cleanup_return: | |
2631 | free_commit_array(&arr); | |
2632 | return ret; | |
2633 | } | |
2634 | ||
2635 | /* | |
2636 | * Check for reachability of a remote-tracking | |
2637 | * ref in the reflog entries of its local ref. | |
2638 | */ | |
2639 | static void check_if_includes_upstream(struct ref *remote) | |
2640 | { | |
2641 | struct ref *local = get_local_ref(remote->name); | |
2642 | if (!local) | |
2643 | return; | |
2644 | ||
2645 | if (is_reachable_in_reflog(local->name, remote) <= 0) | |
2646 | remote->unreachable = 1; | |
2647 | } | |
2648 | ||
2649 | static void apply_cas(struct push_cas_option *cas, | |
2650 | struct remote *remote, | |
2651 | struct ref *ref) | |
2652 | { | |
2653 | int i; | |
2654 | ||
2655 | /* Find an explicit --<option>=<name>[:<value>] entry */ | |
2656 | for (i = 0; i < cas->nr; i++) { | |
2657 | struct push_cas *entry = &cas->entry[i]; | |
2658 | if (!refname_match(entry->refname, ref->name)) | |
2659 | continue; | |
2660 | ref->expect_old_sha1 = 1; | |
2661 | if (!entry->use_tracking) | |
2662 | oidcpy(&ref->old_oid_expect, &entry->expect); | |
2663 | else if (remote_tracking(remote, ref->name, | |
2664 | &ref->old_oid_expect, | |
2665 | &ref->tracking_ref)) | |
2666 | oidclr(&ref->old_oid_expect); | |
2667 | else | |
2668 | ref->check_reachable = cas->use_force_if_includes; | |
2669 | return; | |
2670 | } | |
2671 | ||
2672 | /* Are we using "--<option>" to cover all? */ | |
2673 | if (!cas->use_tracking_for_rest) | |
2674 | return; | |
2675 | ||
2676 | ref->expect_old_sha1 = 1; | |
2677 | if (remote_tracking(remote, ref->name, | |
2678 | &ref->old_oid_expect, | |
2679 | &ref->tracking_ref)) | |
2680 | oidclr(&ref->old_oid_expect); | |
2681 | else | |
2682 | ref->check_reachable = cas->use_force_if_includes; | |
2683 | } | |
2684 | ||
2685 | void apply_push_cas(struct push_cas_option *cas, | |
2686 | struct remote *remote, | |
2687 | struct ref *remote_refs) | |
2688 | { | |
2689 | struct ref *ref; | |
2690 | for (ref = remote_refs; ref; ref = ref->next) { | |
2691 | apply_cas(cas, remote, ref); | |
2692 | ||
2693 | /* | |
2694 | * If "compare-and-swap" is in "use_tracking[_for_rest]" | |
2695 | * mode, and if "--force-if-includes" was specified, run | |
2696 | * the check. | |
2697 | */ | |
2698 | if (ref->check_reachable) | |
2699 | check_if_includes_upstream(ref); | |
2700 | } | |
2701 | } | |
2702 | ||
2703 | struct remote_state *remote_state_new(void) | |
2704 | { | |
2705 | struct remote_state *r = xmalloc(sizeof(*r)); | |
2706 | ||
2707 | memset(r, 0, sizeof(*r)); | |
2708 | ||
2709 | hashmap_init(&r->remotes_hash, remotes_hash_cmp, NULL, 0); | |
2710 | hashmap_init(&r->branches_hash, branches_hash_cmp, NULL, 0); | |
2711 | return r; | |
2712 | } | |
2713 | ||
2714 | void remote_state_clear(struct remote_state *remote_state) | |
2715 | { | |
2716 | int i; | |
2717 | ||
2718 | for (i = 0; i < remote_state->remotes_nr; i++) | |
2719 | remote_clear(remote_state->remotes[i]); | |
2720 | FREE_AND_NULL(remote_state->remotes); | |
2721 | remote_state->remotes_alloc = 0; | |
2722 | remote_state->remotes_nr = 0; | |
2723 | ||
2724 | hashmap_clear_and_free(&remote_state->remotes_hash, struct remote, ent); | |
2725 | hashmap_clear_and_free(&remote_state->branches_hash, struct remote, ent); | |
2726 | } |