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1 | /* | |
2 | * The backend-independent part of the reference module. | |
3 | */ | |
4 | ||
5 | #include "cache.h" | |
6 | #include "config.h" | |
7 | #include "hashmap.h" | |
8 | #include "lockfile.h" | |
9 | #include "iterator.h" | |
10 | #include "refs.h" | |
11 | #include "refs/refs-internal.h" | |
12 | #include "object-store.h" | |
13 | #include "object.h" | |
14 | #include "tag.h" | |
15 | #include "submodule.h" | |
16 | #include "worktree.h" | |
17 | #include "argv-array.h" | |
18 | #include "repository.h" | |
19 | ||
20 | /* | |
21 | * List of all available backends | |
22 | */ | |
23 | static struct ref_storage_be *refs_backends = &refs_be_files; | |
24 | ||
25 | static struct ref_storage_be *find_ref_storage_backend(const char *name) | |
26 | { | |
27 | struct ref_storage_be *be; | |
28 | for (be = refs_backends; be; be = be->next) | |
29 | if (!strcmp(be->name, name)) | |
30 | return be; | |
31 | return NULL; | |
32 | } | |
33 | ||
34 | int ref_storage_backend_exists(const char *name) | |
35 | { | |
36 | return find_ref_storage_backend(name) != NULL; | |
37 | } | |
38 | ||
39 | /* | |
40 | * How to handle various characters in refnames: | |
41 | * 0: An acceptable character for refs | |
42 | * 1: End-of-component | |
43 | * 2: ., look for a preceding . to reject .. in refs | |
44 | * 3: {, look for a preceding @ to reject @{ in refs | |
45 | * 4: A bad character: ASCII control characters, and | |
46 | * ":", "?", "[", "\", "^", "~", SP, or TAB | |
47 | * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set | |
48 | */ | |
49 | static unsigned char refname_disposition[256] = { | |
50 | 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
51 | 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
52 | 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1, | |
53 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4, | |
54 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
55 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0, | |
56 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
57 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4 | |
58 | }; | |
59 | ||
60 | /* | |
61 | * Try to read one refname component from the front of refname. | |
62 | * Return the length of the component found, or -1 if the component is | |
63 | * not legal. It is legal if it is something reasonable to have under | |
64 | * ".git/refs/"; We do not like it if: | |
65 | * | |
66 | * - any path component of it begins with ".", or | |
67 | * - it has double dots "..", or | |
68 | * - it has ASCII control characters, or | |
69 | * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or | |
70 | * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or | |
71 | * - it ends with a "/", or | |
72 | * - it ends with ".lock", or | |
73 | * - it contains a "@{" portion | |
74 | */ | |
75 | static int check_refname_component(const char *refname, int *flags) | |
76 | { | |
77 | const char *cp; | |
78 | char last = '\0'; | |
79 | ||
80 | for (cp = refname; ; cp++) { | |
81 | int ch = *cp & 255; | |
82 | unsigned char disp = refname_disposition[ch]; | |
83 | switch (disp) { | |
84 | case 1: | |
85 | goto out; | |
86 | case 2: | |
87 | if (last == '.') | |
88 | return -1; /* Refname contains "..". */ | |
89 | break; | |
90 | case 3: | |
91 | if (last == '@') | |
92 | return -1; /* Refname contains "@{". */ | |
93 | break; | |
94 | case 4: | |
95 | return -1; | |
96 | case 5: | |
97 | if (!(*flags & REFNAME_REFSPEC_PATTERN)) | |
98 | return -1; /* refspec can't be a pattern */ | |
99 | ||
100 | /* | |
101 | * Unset the pattern flag so that we only accept | |
102 | * a single asterisk for one side of refspec. | |
103 | */ | |
104 | *flags &= ~ REFNAME_REFSPEC_PATTERN; | |
105 | break; | |
106 | } | |
107 | last = ch; | |
108 | } | |
109 | out: | |
110 | if (cp == refname) | |
111 | return 0; /* Component has zero length. */ | |
112 | if (refname[0] == '.') | |
113 | return -1; /* Component starts with '.'. */ | |
114 | if (cp - refname >= LOCK_SUFFIX_LEN && | |
115 | !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN)) | |
116 | return -1; /* Refname ends with ".lock". */ | |
117 | return cp - refname; | |
118 | } | |
119 | ||
120 | int check_refname_format(const char *refname, int flags) | |
121 | { | |
122 | int component_len, component_count = 0; | |
123 | ||
124 | if (!strcmp(refname, "@")) | |
125 | /* Refname is a single character '@'. */ | |
126 | return -1; | |
127 | ||
128 | while (1) { | |
129 | /* We are at the start of a path component. */ | |
130 | component_len = check_refname_component(refname, &flags); | |
131 | if (component_len <= 0) | |
132 | return -1; | |
133 | ||
134 | component_count++; | |
135 | if (refname[component_len] == '\0') | |
136 | break; | |
137 | /* Skip to next component. */ | |
138 | refname += component_len + 1; | |
139 | } | |
140 | ||
141 | if (refname[component_len - 1] == '.') | |
142 | return -1; /* Refname ends with '.'. */ | |
143 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) | |
144 | return -1; /* Refname has only one component. */ | |
145 | return 0; | |
146 | } | |
147 | ||
148 | int refname_is_safe(const char *refname) | |
149 | { | |
150 | const char *rest; | |
151 | ||
152 | if (skip_prefix(refname, "refs/", &rest)) { | |
153 | char *buf; | |
154 | int result; | |
155 | size_t restlen = strlen(rest); | |
156 | ||
157 | /* rest must not be empty, or start or end with "/" */ | |
158 | if (!restlen || *rest == '/' || rest[restlen - 1] == '/') | |
159 | return 0; | |
160 | ||
161 | /* | |
162 | * Does the refname try to escape refs/? | |
163 | * For example: refs/foo/../bar is safe but refs/foo/../../bar | |
164 | * is not. | |
165 | */ | |
166 | buf = xmallocz(restlen); | |
167 | result = !normalize_path_copy(buf, rest) && !strcmp(buf, rest); | |
168 | free(buf); | |
169 | return result; | |
170 | } | |
171 | ||
172 | do { | |
173 | if (!isupper(*refname) && *refname != '_') | |
174 | return 0; | |
175 | refname++; | |
176 | } while (*refname); | |
177 | return 1; | |
178 | } | |
179 | ||
180 | /* | |
181 | * Return true if refname, which has the specified oid and flags, can | |
182 | * be resolved to an object in the database. If the referred-to object | |
183 | * does not exist, emit a warning and return false. | |
184 | */ | |
185 | int ref_resolves_to_object(const char *refname, | |
186 | const struct object_id *oid, | |
187 | unsigned int flags) | |
188 | { | |
189 | if (flags & REF_ISBROKEN) | |
190 | return 0; | |
191 | if (!has_sha1_file(oid->hash)) { | |
192 | error(_("%s does not point to a valid object!"), refname); | |
193 | return 0; | |
194 | } | |
195 | return 1; | |
196 | } | |
197 | ||
198 | char *refs_resolve_refdup(struct ref_store *refs, | |
199 | const char *refname, int resolve_flags, | |
200 | struct object_id *oid, int *flags) | |
201 | { | |
202 | const char *result; | |
203 | ||
204 | result = refs_resolve_ref_unsafe(refs, refname, resolve_flags, | |
205 | oid, flags); | |
206 | return xstrdup_or_null(result); | |
207 | } | |
208 | ||
209 | char *resolve_refdup(const char *refname, int resolve_flags, | |
210 | struct object_id *oid, int *flags) | |
211 | { | |
212 | return refs_resolve_refdup(get_main_ref_store(the_repository), | |
213 | refname, resolve_flags, | |
214 | oid, flags); | |
215 | } | |
216 | ||
217 | /* The argument to filter_refs */ | |
218 | struct ref_filter { | |
219 | const char *pattern; | |
220 | each_ref_fn *fn; | |
221 | void *cb_data; | |
222 | }; | |
223 | ||
224 | int refs_read_ref_full(struct ref_store *refs, const char *refname, | |
225 | int resolve_flags, struct object_id *oid, int *flags) | |
226 | { | |
227 | if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, oid, flags)) | |
228 | return 0; | |
229 | return -1; | |
230 | } | |
231 | ||
232 | int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags) | |
233 | { | |
234 | return refs_read_ref_full(get_main_ref_store(the_repository), refname, | |
235 | resolve_flags, oid, flags); | |
236 | } | |
237 | ||
238 | int read_ref(const char *refname, struct object_id *oid) | |
239 | { | |
240 | return read_ref_full(refname, RESOLVE_REF_READING, oid, NULL); | |
241 | } | |
242 | ||
243 | int ref_exists(const char *refname) | |
244 | { | |
245 | return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, NULL, NULL); | |
246 | } | |
247 | ||
248 | static int match_ref_pattern(const char *refname, | |
249 | const struct string_list_item *item) | |
250 | { | |
251 | int matched = 0; | |
252 | if (item->util == NULL) { | |
253 | if (!wildmatch(item->string, refname, 0)) | |
254 | matched = 1; | |
255 | } else { | |
256 | const char *rest; | |
257 | if (skip_prefix(refname, item->string, &rest) && | |
258 | (!*rest || *rest == '/')) | |
259 | matched = 1; | |
260 | } | |
261 | return matched; | |
262 | } | |
263 | ||
264 | int ref_filter_match(const char *refname, | |
265 | const struct string_list *include_patterns, | |
266 | const struct string_list *exclude_patterns) | |
267 | { | |
268 | struct string_list_item *item; | |
269 | ||
270 | if (exclude_patterns && exclude_patterns->nr) { | |
271 | for_each_string_list_item(item, exclude_patterns) { | |
272 | if (match_ref_pattern(refname, item)) | |
273 | return 0; | |
274 | } | |
275 | } | |
276 | ||
277 | if (include_patterns && include_patterns->nr) { | |
278 | int found = 0; | |
279 | for_each_string_list_item(item, include_patterns) { | |
280 | if (match_ref_pattern(refname, item)) { | |
281 | found = 1; | |
282 | break; | |
283 | } | |
284 | } | |
285 | ||
286 | if (!found) | |
287 | return 0; | |
288 | } | |
289 | return 1; | |
290 | } | |
291 | ||
292 | static int filter_refs(const char *refname, const struct object_id *oid, | |
293 | int flags, void *data) | |
294 | { | |
295 | struct ref_filter *filter = (struct ref_filter *)data; | |
296 | ||
297 | if (wildmatch(filter->pattern, refname, 0)) | |
298 | return 0; | |
299 | return filter->fn(refname, oid, flags, filter->cb_data); | |
300 | } | |
301 | ||
302 | enum peel_status peel_object(const struct object_id *name, struct object_id *oid) | |
303 | { | |
304 | struct object *o = lookup_unknown_object(name->hash); | |
305 | ||
306 | if (o->type == OBJ_NONE) { | |
307 | int type = oid_object_info(the_repository, name, NULL); | |
308 | if (type < 0 || !object_as_type(the_repository, o, type, 0)) | |
309 | return PEEL_INVALID; | |
310 | } | |
311 | ||
312 | if (o->type != OBJ_TAG) | |
313 | return PEEL_NON_TAG; | |
314 | ||
315 | o = deref_tag_noverify(o); | |
316 | if (!o) | |
317 | return PEEL_INVALID; | |
318 | ||
319 | oidcpy(oid, &o->oid); | |
320 | return PEEL_PEELED; | |
321 | } | |
322 | ||
323 | struct warn_if_dangling_data { | |
324 | FILE *fp; | |
325 | const char *refname; | |
326 | const struct string_list *refnames; | |
327 | const char *msg_fmt; | |
328 | }; | |
329 | ||
330 | static int warn_if_dangling_symref(const char *refname, const struct object_id *oid, | |
331 | int flags, void *cb_data) | |
332 | { | |
333 | struct warn_if_dangling_data *d = cb_data; | |
334 | const char *resolves_to; | |
335 | ||
336 | if (!(flags & REF_ISSYMREF)) | |
337 | return 0; | |
338 | ||
339 | resolves_to = resolve_ref_unsafe(refname, 0, NULL, NULL); | |
340 | if (!resolves_to | |
341 | || (d->refname | |
342 | ? strcmp(resolves_to, d->refname) | |
343 | : !string_list_has_string(d->refnames, resolves_to))) { | |
344 | return 0; | |
345 | } | |
346 | ||
347 | fprintf(d->fp, d->msg_fmt, refname); | |
348 | fputc('\n', d->fp); | |
349 | return 0; | |
350 | } | |
351 | ||
352 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) | |
353 | { | |
354 | struct warn_if_dangling_data data; | |
355 | ||
356 | data.fp = fp; | |
357 | data.refname = refname; | |
358 | data.refnames = NULL; | |
359 | data.msg_fmt = msg_fmt; | |
360 | for_each_rawref(warn_if_dangling_symref, &data); | |
361 | } | |
362 | ||
363 | void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames) | |
364 | { | |
365 | struct warn_if_dangling_data data; | |
366 | ||
367 | data.fp = fp; | |
368 | data.refname = NULL; | |
369 | data.refnames = refnames; | |
370 | data.msg_fmt = msg_fmt; | |
371 | for_each_rawref(warn_if_dangling_symref, &data); | |
372 | } | |
373 | ||
374 | int refs_for_each_tag_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
375 | { | |
376 | return refs_for_each_ref_in(refs, "refs/tags/", fn, cb_data); | |
377 | } | |
378 | ||
379 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) | |
380 | { | |
381 | return refs_for_each_tag_ref(get_main_ref_store(the_repository), fn, cb_data); | |
382 | } | |
383 | ||
384 | int refs_for_each_branch_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
385 | { | |
386 | return refs_for_each_ref_in(refs, "refs/heads/", fn, cb_data); | |
387 | } | |
388 | ||
389 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) | |
390 | { | |
391 | return refs_for_each_branch_ref(get_main_ref_store(the_repository), fn, cb_data); | |
392 | } | |
393 | ||
394 | int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
395 | { | |
396 | return refs_for_each_ref_in(refs, "refs/remotes/", fn, cb_data); | |
397 | } | |
398 | ||
399 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) | |
400 | { | |
401 | return refs_for_each_remote_ref(get_main_ref_store(the_repository), fn, cb_data); | |
402 | } | |
403 | ||
404 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) | |
405 | { | |
406 | struct strbuf buf = STRBUF_INIT; | |
407 | int ret = 0; | |
408 | struct object_id oid; | |
409 | int flag; | |
410 | ||
411 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); | |
412 | if (!read_ref_full(buf.buf, RESOLVE_REF_READING, &oid, &flag)) | |
413 | ret = fn(buf.buf, &oid, flag, cb_data); | |
414 | strbuf_release(&buf); | |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
419 | void normalize_glob_ref(struct string_list_item *item, const char *prefix, | |
420 | const char *pattern) | |
421 | { | |
422 | struct strbuf normalized_pattern = STRBUF_INIT; | |
423 | ||
424 | if (*pattern == '/') | |
425 | BUG("pattern must not start with '/'"); | |
426 | ||
427 | if (prefix) { | |
428 | strbuf_addstr(&normalized_pattern, prefix); | |
429 | } | |
430 | else if (!starts_with(pattern, "refs/")) | |
431 | strbuf_addstr(&normalized_pattern, "refs/"); | |
432 | strbuf_addstr(&normalized_pattern, pattern); | |
433 | strbuf_strip_suffix(&normalized_pattern, "/"); | |
434 | ||
435 | item->string = strbuf_detach(&normalized_pattern, NULL); | |
436 | item->util = has_glob_specials(pattern) ? NULL : item->string; | |
437 | strbuf_release(&normalized_pattern); | |
438 | } | |
439 | ||
440 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, | |
441 | const char *prefix, void *cb_data) | |
442 | { | |
443 | struct strbuf real_pattern = STRBUF_INIT; | |
444 | struct ref_filter filter; | |
445 | int ret; | |
446 | ||
447 | if (!prefix && !starts_with(pattern, "refs/")) | |
448 | strbuf_addstr(&real_pattern, "refs/"); | |
449 | else if (prefix) | |
450 | strbuf_addstr(&real_pattern, prefix); | |
451 | strbuf_addstr(&real_pattern, pattern); | |
452 | ||
453 | if (!has_glob_specials(pattern)) { | |
454 | /* Append implied '/' '*' if not present. */ | |
455 | strbuf_complete(&real_pattern, '/'); | |
456 | /* No need to check for '*', there is none. */ | |
457 | strbuf_addch(&real_pattern, '*'); | |
458 | } | |
459 | ||
460 | filter.pattern = real_pattern.buf; | |
461 | filter.fn = fn; | |
462 | filter.cb_data = cb_data; | |
463 | ret = for_each_ref(filter_refs, &filter); | |
464 | ||
465 | strbuf_release(&real_pattern); | |
466 | return ret; | |
467 | } | |
468 | ||
469 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) | |
470 | { | |
471 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
472 | } | |
473 | ||
474 | const char *prettify_refname(const char *name) | |
475 | { | |
476 | if (skip_prefix(name, "refs/heads/", &name) || | |
477 | skip_prefix(name, "refs/tags/", &name) || | |
478 | skip_prefix(name, "refs/remotes/", &name)) | |
479 | ; /* nothing */ | |
480 | return name; | |
481 | } | |
482 | ||
483 | static const char *ref_rev_parse_rules[] = { | |
484 | "%.*s", | |
485 | "refs/%.*s", | |
486 | "refs/tags/%.*s", | |
487 | "refs/heads/%.*s", | |
488 | "refs/remotes/%.*s", | |
489 | "refs/remotes/%.*s/HEAD", | |
490 | NULL | |
491 | }; | |
492 | ||
493 | #define NUM_REV_PARSE_RULES (ARRAY_SIZE(ref_rev_parse_rules) - 1) | |
494 | ||
495 | /* | |
496 | * Is it possible that the caller meant full_name with abbrev_name? | |
497 | * If so return a non-zero value to signal "yes"; the magnitude of | |
498 | * the returned value gives the precedence used for disambiguation. | |
499 | * | |
500 | * If abbrev_name cannot mean full_name, return 0. | |
501 | */ | |
502 | int refname_match(const char *abbrev_name, const char *full_name) | |
503 | { | |
504 | const char **p; | |
505 | const int abbrev_name_len = strlen(abbrev_name); | |
506 | const int num_rules = NUM_REV_PARSE_RULES; | |
507 | ||
508 | for (p = ref_rev_parse_rules; *p; p++) | |
509 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) | |
510 | return &ref_rev_parse_rules[num_rules] - p; | |
511 | ||
512 | return 0; | |
513 | } | |
514 | ||
515 | /* | |
516 | * Given a 'prefix' expand it by the rules in 'ref_rev_parse_rules' and add | |
517 | * the results to 'prefixes' | |
518 | */ | |
519 | void expand_ref_prefix(struct argv_array *prefixes, const char *prefix) | |
520 | { | |
521 | const char **p; | |
522 | int len = strlen(prefix); | |
523 | ||
524 | for (p = ref_rev_parse_rules; *p; p++) | |
525 | argv_array_pushf(prefixes, *p, len, prefix); | |
526 | } | |
527 | ||
528 | /* | |
529 | * *string and *len will only be substituted, and *string returned (for | |
530 | * later free()ing) if the string passed in is a magic short-hand form | |
531 | * to name a branch. | |
532 | */ | |
533 | static char *substitute_branch_name(const char **string, int *len) | |
534 | { | |
535 | struct strbuf buf = STRBUF_INIT; | |
536 | int ret = interpret_branch_name(*string, *len, &buf, 0); | |
537 | ||
538 | if (ret == *len) { | |
539 | size_t size; | |
540 | *string = strbuf_detach(&buf, &size); | |
541 | *len = size; | |
542 | return (char *)*string; | |
543 | } | |
544 | ||
545 | return NULL; | |
546 | } | |
547 | ||
548 | int dwim_ref(const char *str, int len, struct object_id *oid, char **ref) | |
549 | { | |
550 | char *last_branch = substitute_branch_name(&str, &len); | |
551 | int refs_found = expand_ref(str, len, oid, ref); | |
552 | free(last_branch); | |
553 | return refs_found; | |
554 | } | |
555 | ||
556 | int expand_ref(const char *str, int len, struct object_id *oid, char **ref) | |
557 | { | |
558 | const char **p, *r; | |
559 | int refs_found = 0; | |
560 | struct strbuf fullref = STRBUF_INIT; | |
561 | ||
562 | *ref = NULL; | |
563 | for (p = ref_rev_parse_rules; *p; p++) { | |
564 | struct object_id oid_from_ref; | |
565 | struct object_id *this_result; | |
566 | int flag; | |
567 | ||
568 | this_result = refs_found ? &oid_from_ref : oid; | |
569 | strbuf_reset(&fullref); | |
570 | strbuf_addf(&fullref, *p, len, str); | |
571 | r = resolve_ref_unsafe(fullref.buf, RESOLVE_REF_READING, | |
572 | this_result, &flag); | |
573 | if (r) { | |
574 | if (!refs_found++) | |
575 | *ref = xstrdup(r); | |
576 | if (!warn_ambiguous_refs) | |
577 | break; | |
578 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) { | |
579 | warning(_("ignoring dangling symref %s"), fullref.buf); | |
580 | } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) { | |
581 | warning(_("ignoring broken ref %s"), fullref.buf); | |
582 | } | |
583 | } | |
584 | strbuf_release(&fullref); | |
585 | return refs_found; | |
586 | } | |
587 | ||
588 | int dwim_log(const char *str, int len, struct object_id *oid, char **log) | |
589 | { | |
590 | char *last_branch = substitute_branch_name(&str, &len); | |
591 | const char **p; | |
592 | int logs_found = 0; | |
593 | struct strbuf path = STRBUF_INIT; | |
594 | ||
595 | *log = NULL; | |
596 | for (p = ref_rev_parse_rules; *p; p++) { | |
597 | struct object_id hash; | |
598 | const char *ref, *it; | |
599 | ||
600 | strbuf_reset(&path); | |
601 | strbuf_addf(&path, *p, len, str); | |
602 | ref = resolve_ref_unsafe(path.buf, RESOLVE_REF_READING, | |
603 | &hash, NULL); | |
604 | if (!ref) | |
605 | continue; | |
606 | if (reflog_exists(path.buf)) | |
607 | it = path.buf; | |
608 | else if (strcmp(ref, path.buf) && reflog_exists(ref)) | |
609 | it = ref; | |
610 | else | |
611 | continue; | |
612 | if (!logs_found++) { | |
613 | *log = xstrdup(it); | |
614 | oidcpy(oid, &hash); | |
615 | } | |
616 | if (!warn_ambiguous_refs) | |
617 | break; | |
618 | } | |
619 | strbuf_release(&path); | |
620 | free(last_branch); | |
621 | return logs_found; | |
622 | } | |
623 | ||
624 | static int is_per_worktree_ref(const char *refname) | |
625 | { | |
626 | return !strcmp(refname, "HEAD") || | |
627 | starts_with(refname, "refs/bisect/") || | |
628 | starts_with(refname, "refs/rewritten/"); | |
629 | } | |
630 | ||
631 | static int is_pseudoref_syntax(const char *refname) | |
632 | { | |
633 | const char *c; | |
634 | ||
635 | for (c = refname; *c; c++) { | |
636 | if (!isupper(*c) && *c != '-' && *c != '_') | |
637 | return 0; | |
638 | } | |
639 | ||
640 | return 1; | |
641 | } | |
642 | ||
643 | enum ref_type ref_type(const char *refname) | |
644 | { | |
645 | if (is_per_worktree_ref(refname)) | |
646 | return REF_TYPE_PER_WORKTREE; | |
647 | if (is_pseudoref_syntax(refname)) | |
648 | return REF_TYPE_PSEUDOREF; | |
649 | return REF_TYPE_NORMAL; | |
650 | } | |
651 | ||
652 | long get_files_ref_lock_timeout_ms(void) | |
653 | { | |
654 | static int configured = 0; | |
655 | ||
656 | /* The default timeout is 100 ms: */ | |
657 | static int timeout_ms = 100; | |
658 | ||
659 | if (!configured) { | |
660 | git_config_get_int("core.filesreflocktimeout", &timeout_ms); | |
661 | configured = 1; | |
662 | } | |
663 | ||
664 | return timeout_ms; | |
665 | } | |
666 | ||
667 | static int write_pseudoref(const char *pseudoref, const struct object_id *oid, | |
668 | const struct object_id *old_oid, struct strbuf *err) | |
669 | { | |
670 | const char *filename; | |
671 | int fd; | |
672 | struct lock_file lock = LOCK_INIT; | |
673 | struct strbuf buf = STRBUF_INIT; | |
674 | int ret = -1; | |
675 | ||
676 | if (!oid) | |
677 | return 0; | |
678 | ||
679 | strbuf_addf(&buf, "%s\n", oid_to_hex(oid)); | |
680 | ||
681 | filename = git_path("%s", pseudoref); | |
682 | fd = hold_lock_file_for_update_timeout(&lock, filename, 0, | |
683 | get_files_ref_lock_timeout_ms()); | |
684 | if (fd < 0) { | |
685 | strbuf_addf(err, _("could not open '%s' for writing: %s"), | |
686 | filename, strerror(errno)); | |
687 | goto done; | |
688 | } | |
689 | ||
690 | if (old_oid) { | |
691 | struct object_id actual_old_oid; | |
692 | ||
693 | if (read_ref(pseudoref, &actual_old_oid)) { | |
694 | if (!is_null_oid(old_oid)) { | |
695 | strbuf_addf(err, _("could not read ref '%s'"), | |
696 | pseudoref); | |
697 | rollback_lock_file(&lock); | |
698 | goto done; | |
699 | } | |
700 | } else if (is_null_oid(old_oid)) { | |
701 | strbuf_addf(err, _("ref '%s' already exists"), | |
702 | pseudoref); | |
703 | rollback_lock_file(&lock); | |
704 | goto done; | |
705 | } else if (!oideq(&actual_old_oid, old_oid)) { | |
706 | strbuf_addf(err, _("unexpected object ID when writing '%s'"), | |
707 | pseudoref); | |
708 | rollback_lock_file(&lock); | |
709 | goto done; | |
710 | } | |
711 | } | |
712 | ||
713 | if (write_in_full(fd, buf.buf, buf.len) < 0) { | |
714 | strbuf_addf(err, _("could not write to '%s'"), filename); | |
715 | rollback_lock_file(&lock); | |
716 | goto done; | |
717 | } | |
718 | ||
719 | commit_lock_file(&lock); | |
720 | ret = 0; | |
721 | done: | |
722 | strbuf_release(&buf); | |
723 | return ret; | |
724 | } | |
725 | ||
726 | static int delete_pseudoref(const char *pseudoref, const struct object_id *old_oid) | |
727 | { | |
728 | const char *filename; | |
729 | ||
730 | filename = git_path("%s", pseudoref); | |
731 | ||
732 | if (old_oid && !is_null_oid(old_oid)) { | |
733 | struct lock_file lock = LOCK_INIT; | |
734 | int fd; | |
735 | struct object_id actual_old_oid; | |
736 | ||
737 | fd = hold_lock_file_for_update_timeout( | |
738 | &lock, filename, 0, | |
739 | get_files_ref_lock_timeout_ms()); | |
740 | if (fd < 0) { | |
741 | error_errno(_("could not open '%s' for writing"), | |
742 | filename); | |
743 | return -1; | |
744 | } | |
745 | if (read_ref(pseudoref, &actual_old_oid)) | |
746 | die(_("could not read ref '%s'"), pseudoref); | |
747 | if (!oideq(&actual_old_oid, old_oid)) { | |
748 | error(_("unexpected object ID when deleting '%s'"), | |
749 | pseudoref); | |
750 | rollback_lock_file(&lock); | |
751 | return -1; | |
752 | } | |
753 | ||
754 | unlink(filename); | |
755 | rollback_lock_file(&lock); | |
756 | } else { | |
757 | unlink(filename); | |
758 | } | |
759 | ||
760 | return 0; | |
761 | } | |
762 | ||
763 | int refs_delete_ref(struct ref_store *refs, const char *msg, | |
764 | const char *refname, | |
765 | const struct object_id *old_oid, | |
766 | unsigned int flags) | |
767 | { | |
768 | struct ref_transaction *transaction; | |
769 | struct strbuf err = STRBUF_INIT; | |
770 | ||
771 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { | |
772 | assert(refs == get_main_ref_store(the_repository)); | |
773 | return delete_pseudoref(refname, old_oid); | |
774 | } | |
775 | ||
776 | transaction = ref_store_transaction_begin(refs, &err); | |
777 | if (!transaction || | |
778 | ref_transaction_delete(transaction, refname, old_oid, | |
779 | flags, msg, &err) || | |
780 | ref_transaction_commit(transaction, &err)) { | |
781 | error("%s", err.buf); | |
782 | ref_transaction_free(transaction); | |
783 | strbuf_release(&err); | |
784 | return 1; | |
785 | } | |
786 | ref_transaction_free(transaction); | |
787 | strbuf_release(&err); | |
788 | return 0; | |
789 | } | |
790 | ||
791 | int delete_ref(const char *msg, const char *refname, | |
792 | const struct object_id *old_oid, unsigned int flags) | |
793 | { | |
794 | return refs_delete_ref(get_main_ref_store(the_repository), msg, refname, | |
795 | old_oid, flags); | |
796 | } | |
797 | ||
798 | void copy_reflog_msg(struct strbuf *sb, const char *msg) | |
799 | { | |
800 | char c; | |
801 | int wasspace = 1; | |
802 | ||
803 | strbuf_addch(sb, '\t'); | |
804 | while ((c = *msg++)) { | |
805 | if (wasspace && isspace(c)) | |
806 | continue; | |
807 | wasspace = isspace(c); | |
808 | if (wasspace) | |
809 | c = ' '; | |
810 | strbuf_addch(sb, c); | |
811 | } | |
812 | strbuf_rtrim(sb); | |
813 | } | |
814 | ||
815 | int should_autocreate_reflog(const char *refname) | |
816 | { | |
817 | switch (log_all_ref_updates) { | |
818 | case LOG_REFS_ALWAYS: | |
819 | return 1; | |
820 | case LOG_REFS_NORMAL: | |
821 | return starts_with(refname, "refs/heads/") || | |
822 | starts_with(refname, "refs/remotes/") || | |
823 | starts_with(refname, "refs/notes/") || | |
824 | !strcmp(refname, "HEAD"); | |
825 | default: | |
826 | return 0; | |
827 | } | |
828 | } | |
829 | ||
830 | int is_branch(const char *refname) | |
831 | { | |
832 | return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/"); | |
833 | } | |
834 | ||
835 | struct read_ref_at_cb { | |
836 | const char *refname; | |
837 | timestamp_t at_time; | |
838 | int cnt; | |
839 | int reccnt; | |
840 | struct object_id *oid; | |
841 | int found_it; | |
842 | ||
843 | struct object_id ooid; | |
844 | struct object_id noid; | |
845 | int tz; | |
846 | timestamp_t date; | |
847 | char **msg; | |
848 | timestamp_t *cutoff_time; | |
849 | int *cutoff_tz; | |
850 | int *cutoff_cnt; | |
851 | }; | |
852 | ||
853 | static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid, | |
854 | const char *email, timestamp_t timestamp, int tz, | |
855 | const char *message, void *cb_data) | |
856 | { | |
857 | struct read_ref_at_cb *cb = cb_data; | |
858 | ||
859 | cb->reccnt++; | |
860 | cb->tz = tz; | |
861 | cb->date = timestamp; | |
862 | ||
863 | if (timestamp <= cb->at_time || cb->cnt == 0) { | |
864 | if (cb->msg) | |
865 | *cb->msg = xstrdup(message); | |
866 | if (cb->cutoff_time) | |
867 | *cb->cutoff_time = timestamp; | |
868 | if (cb->cutoff_tz) | |
869 | *cb->cutoff_tz = tz; | |
870 | if (cb->cutoff_cnt) | |
871 | *cb->cutoff_cnt = cb->reccnt - 1; | |
872 | /* | |
873 | * we have not yet updated cb->[n|o]oid so they still | |
874 | * hold the values for the previous record. | |
875 | */ | |
876 | if (!is_null_oid(&cb->ooid)) { | |
877 | oidcpy(cb->oid, noid); | |
878 | if (!oideq(&cb->ooid, noid)) | |
879 | warning(_("log for ref %s has gap after %s"), | |
880 | cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822))); | |
881 | } | |
882 | else if (cb->date == cb->at_time) | |
883 | oidcpy(cb->oid, noid); | |
884 | else if (!oideq(noid, cb->oid)) | |
885 | warning(_("log for ref %s unexpectedly ended on %s"), | |
886 | cb->refname, show_date(cb->date, cb->tz, | |
887 | DATE_MODE(RFC2822))); | |
888 | oidcpy(&cb->ooid, ooid); | |
889 | oidcpy(&cb->noid, noid); | |
890 | cb->found_it = 1; | |
891 | return 1; | |
892 | } | |
893 | oidcpy(&cb->ooid, ooid); | |
894 | oidcpy(&cb->noid, noid); | |
895 | if (cb->cnt > 0) | |
896 | cb->cnt--; | |
897 | return 0; | |
898 | } | |
899 | ||
900 | static int read_ref_at_ent_oldest(struct object_id *ooid, struct object_id *noid, | |
901 | const char *email, timestamp_t timestamp, | |
902 | int tz, const char *message, void *cb_data) | |
903 | { | |
904 | struct read_ref_at_cb *cb = cb_data; | |
905 | ||
906 | if (cb->msg) | |
907 | *cb->msg = xstrdup(message); | |
908 | if (cb->cutoff_time) | |
909 | *cb->cutoff_time = timestamp; | |
910 | if (cb->cutoff_tz) | |
911 | *cb->cutoff_tz = tz; | |
912 | if (cb->cutoff_cnt) | |
913 | *cb->cutoff_cnt = cb->reccnt; | |
914 | oidcpy(cb->oid, ooid); | |
915 | if (is_null_oid(cb->oid)) | |
916 | oidcpy(cb->oid, noid); | |
917 | /* We just want the first entry */ | |
918 | return 1; | |
919 | } | |
920 | ||
921 | int read_ref_at(const char *refname, unsigned int flags, timestamp_t at_time, int cnt, | |
922 | struct object_id *oid, char **msg, | |
923 | timestamp_t *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
924 | { | |
925 | struct read_ref_at_cb cb; | |
926 | ||
927 | memset(&cb, 0, sizeof(cb)); | |
928 | cb.refname = refname; | |
929 | cb.at_time = at_time; | |
930 | cb.cnt = cnt; | |
931 | cb.msg = msg; | |
932 | cb.cutoff_time = cutoff_time; | |
933 | cb.cutoff_tz = cutoff_tz; | |
934 | cb.cutoff_cnt = cutoff_cnt; | |
935 | cb.oid = oid; | |
936 | ||
937 | for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb); | |
938 | ||
939 | if (!cb.reccnt) { | |
940 | if (flags & GET_OID_QUIETLY) | |
941 | exit(128); | |
942 | else | |
943 | die(_("log for %s is empty"), refname); | |
944 | } | |
945 | if (cb.found_it) | |
946 | return 0; | |
947 | ||
948 | for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb); | |
949 | ||
950 | return 1; | |
951 | } | |
952 | ||
953 | struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs, | |
954 | struct strbuf *err) | |
955 | { | |
956 | struct ref_transaction *tr; | |
957 | assert(err); | |
958 | ||
959 | tr = xcalloc(1, sizeof(struct ref_transaction)); | |
960 | tr->ref_store = refs; | |
961 | return tr; | |
962 | } | |
963 | ||
964 | struct ref_transaction *ref_transaction_begin(struct strbuf *err) | |
965 | { | |
966 | return ref_store_transaction_begin(get_main_ref_store(the_repository), err); | |
967 | } | |
968 | ||
969 | void ref_transaction_free(struct ref_transaction *transaction) | |
970 | { | |
971 | size_t i; | |
972 | ||
973 | if (!transaction) | |
974 | return; | |
975 | ||
976 | switch (transaction->state) { | |
977 | case REF_TRANSACTION_OPEN: | |
978 | case REF_TRANSACTION_CLOSED: | |
979 | /* OK */ | |
980 | break; | |
981 | case REF_TRANSACTION_PREPARED: | |
982 | BUG("free called on a prepared reference transaction"); | |
983 | break; | |
984 | default: | |
985 | BUG("unexpected reference transaction state"); | |
986 | break; | |
987 | } | |
988 | ||
989 | for (i = 0; i < transaction->nr; i++) { | |
990 | free(transaction->updates[i]->msg); | |
991 | free(transaction->updates[i]); | |
992 | } | |
993 | free(transaction->updates); | |
994 | free(transaction); | |
995 | } | |
996 | ||
997 | struct ref_update *ref_transaction_add_update( | |
998 | struct ref_transaction *transaction, | |
999 | const char *refname, unsigned int flags, | |
1000 | const struct object_id *new_oid, | |
1001 | const struct object_id *old_oid, | |
1002 | const char *msg) | |
1003 | { | |
1004 | struct ref_update *update; | |
1005 | ||
1006 | if (transaction->state != REF_TRANSACTION_OPEN) | |
1007 | BUG("update called for transaction that is not open"); | |
1008 | ||
1009 | FLEX_ALLOC_STR(update, refname, refname); | |
1010 | ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc); | |
1011 | transaction->updates[transaction->nr++] = update; | |
1012 | ||
1013 | update->flags = flags; | |
1014 | ||
1015 | if (flags & REF_HAVE_NEW) | |
1016 | oidcpy(&update->new_oid, new_oid); | |
1017 | if (flags & REF_HAVE_OLD) | |
1018 | oidcpy(&update->old_oid, old_oid); | |
1019 | update->msg = xstrdup_or_null(msg); | |
1020 | return update; | |
1021 | } | |
1022 | ||
1023 | int ref_transaction_update(struct ref_transaction *transaction, | |
1024 | const char *refname, | |
1025 | const struct object_id *new_oid, | |
1026 | const struct object_id *old_oid, | |
1027 | unsigned int flags, const char *msg, | |
1028 | struct strbuf *err) | |
1029 | { | |
1030 | assert(err); | |
1031 | ||
1032 | if ((new_oid && !is_null_oid(new_oid)) ? | |
1033 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) : | |
1034 | !refname_is_safe(refname)) { | |
1035 | strbuf_addf(err, _("refusing to update ref with bad name '%s'"), | |
1036 | refname); | |
1037 | return -1; | |
1038 | } | |
1039 | ||
1040 | if (flags & ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS) | |
1041 | BUG("illegal flags 0x%x passed to ref_transaction_update()", flags); | |
1042 | ||
1043 | flags |= (new_oid ? REF_HAVE_NEW : 0) | (old_oid ? REF_HAVE_OLD : 0); | |
1044 | ||
1045 | ref_transaction_add_update(transaction, refname, flags, | |
1046 | new_oid, old_oid, msg); | |
1047 | return 0; | |
1048 | } | |
1049 | ||
1050 | int ref_transaction_create(struct ref_transaction *transaction, | |
1051 | const char *refname, | |
1052 | const struct object_id *new_oid, | |
1053 | unsigned int flags, const char *msg, | |
1054 | struct strbuf *err) | |
1055 | { | |
1056 | if (!new_oid || is_null_oid(new_oid)) | |
1057 | BUG("create called without valid new_oid"); | |
1058 | return ref_transaction_update(transaction, refname, new_oid, | |
1059 | &null_oid, flags, msg, err); | |
1060 | } | |
1061 | ||
1062 | int ref_transaction_delete(struct ref_transaction *transaction, | |
1063 | const char *refname, | |
1064 | const struct object_id *old_oid, | |
1065 | unsigned int flags, const char *msg, | |
1066 | struct strbuf *err) | |
1067 | { | |
1068 | if (old_oid && is_null_oid(old_oid)) | |
1069 | BUG("delete called with old_oid set to zeros"); | |
1070 | return ref_transaction_update(transaction, refname, | |
1071 | &null_oid, old_oid, | |
1072 | flags, msg, err); | |
1073 | } | |
1074 | ||
1075 | int ref_transaction_verify(struct ref_transaction *transaction, | |
1076 | const char *refname, | |
1077 | const struct object_id *old_oid, | |
1078 | unsigned int flags, | |
1079 | struct strbuf *err) | |
1080 | { | |
1081 | if (!old_oid) | |
1082 | BUG("verify called with old_oid set to NULL"); | |
1083 | return ref_transaction_update(transaction, refname, | |
1084 | NULL, old_oid, | |
1085 | flags, NULL, err); | |
1086 | } | |
1087 | ||
1088 | int refs_update_ref(struct ref_store *refs, const char *msg, | |
1089 | const char *refname, const struct object_id *new_oid, | |
1090 | const struct object_id *old_oid, unsigned int flags, | |
1091 | enum action_on_err onerr) | |
1092 | { | |
1093 | struct ref_transaction *t = NULL; | |
1094 | struct strbuf err = STRBUF_INIT; | |
1095 | int ret = 0; | |
1096 | ||
1097 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { | |
1098 | assert(refs == get_main_ref_store(the_repository)); | |
1099 | ret = write_pseudoref(refname, new_oid, old_oid, &err); | |
1100 | } else { | |
1101 | t = ref_store_transaction_begin(refs, &err); | |
1102 | if (!t || | |
1103 | ref_transaction_update(t, refname, new_oid, old_oid, | |
1104 | flags, msg, &err) || | |
1105 | ref_transaction_commit(t, &err)) { | |
1106 | ret = 1; | |
1107 | ref_transaction_free(t); | |
1108 | } | |
1109 | } | |
1110 | if (ret) { | |
1111 | const char *str = _("update_ref failed for ref '%s': %s"); | |
1112 | ||
1113 | switch (onerr) { | |
1114 | case UPDATE_REFS_MSG_ON_ERR: | |
1115 | error(str, refname, err.buf); | |
1116 | break; | |
1117 | case UPDATE_REFS_DIE_ON_ERR: | |
1118 | die(str, refname, err.buf); | |
1119 | break; | |
1120 | case UPDATE_REFS_QUIET_ON_ERR: | |
1121 | break; | |
1122 | } | |
1123 | strbuf_release(&err); | |
1124 | return 1; | |
1125 | } | |
1126 | strbuf_release(&err); | |
1127 | if (t) | |
1128 | ref_transaction_free(t); | |
1129 | return 0; | |
1130 | } | |
1131 | ||
1132 | int update_ref(const char *msg, const char *refname, | |
1133 | const struct object_id *new_oid, | |
1134 | const struct object_id *old_oid, | |
1135 | unsigned int flags, enum action_on_err onerr) | |
1136 | { | |
1137 | return refs_update_ref(get_main_ref_store(the_repository), msg, refname, new_oid, | |
1138 | old_oid, flags, onerr); | |
1139 | } | |
1140 | ||
1141 | char *shorten_unambiguous_ref(const char *refname, int strict) | |
1142 | { | |
1143 | int i; | |
1144 | static char **scanf_fmts; | |
1145 | static int nr_rules; | |
1146 | char *short_name; | |
1147 | struct strbuf resolved_buf = STRBUF_INIT; | |
1148 | ||
1149 | if (!nr_rules) { | |
1150 | /* | |
1151 | * Pre-generate scanf formats from ref_rev_parse_rules[]. | |
1152 | * Generate a format suitable for scanf from a | |
1153 | * ref_rev_parse_rules rule by interpolating "%s" at the | |
1154 | * location of the "%.*s". | |
1155 | */ | |
1156 | size_t total_len = 0; | |
1157 | size_t offset = 0; | |
1158 | ||
1159 | /* the rule list is NULL terminated, count them first */ | |
1160 | for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
1161 | /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */ | |
1162 | total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1; | |
1163 | ||
1164 | scanf_fmts = xmalloc(st_add(st_mult(sizeof(char *), nr_rules), total_len)); | |
1165 | ||
1166 | offset = 0; | |
1167 | for (i = 0; i < nr_rules; i++) { | |
1168 | assert(offset < total_len); | |
1169 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset; | |
1170 | offset += xsnprintf(scanf_fmts[i], total_len - offset, | |
1171 | ref_rev_parse_rules[i], 2, "%s") + 1; | |
1172 | } | |
1173 | } | |
1174 | ||
1175 | /* bail out if there are no rules */ | |
1176 | if (!nr_rules) | |
1177 | return xstrdup(refname); | |
1178 | ||
1179 | /* buffer for scanf result, at most refname must fit */ | |
1180 | short_name = xstrdup(refname); | |
1181 | ||
1182 | /* skip first rule, it will always match */ | |
1183 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1184 | int j; | |
1185 | int rules_to_fail = i; | |
1186 | int short_name_len; | |
1187 | ||
1188 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) | |
1189 | continue; | |
1190 | ||
1191 | short_name_len = strlen(short_name); | |
1192 | ||
1193 | /* | |
1194 | * in strict mode, all (except the matched one) rules | |
1195 | * must fail to resolve to a valid non-ambiguous ref | |
1196 | */ | |
1197 | if (strict) | |
1198 | rules_to_fail = nr_rules; | |
1199 | ||
1200 | /* | |
1201 | * check if the short name resolves to a valid ref, | |
1202 | * but use only rules prior to the matched one | |
1203 | */ | |
1204 | for (j = 0; j < rules_to_fail; j++) { | |
1205 | const char *rule = ref_rev_parse_rules[j]; | |
1206 | ||
1207 | /* skip matched rule */ | |
1208 | if (i == j) | |
1209 | continue; | |
1210 | ||
1211 | /* | |
1212 | * the short name is ambiguous, if it resolves | |
1213 | * (with this previous rule) to a valid ref | |
1214 | * read_ref() returns 0 on success | |
1215 | */ | |
1216 | strbuf_reset(&resolved_buf); | |
1217 | strbuf_addf(&resolved_buf, rule, | |
1218 | short_name_len, short_name); | |
1219 | if (ref_exists(resolved_buf.buf)) | |
1220 | break; | |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * short name is non-ambiguous if all previous rules | |
1225 | * haven't resolved to a valid ref | |
1226 | */ | |
1227 | if (j == rules_to_fail) { | |
1228 | strbuf_release(&resolved_buf); | |
1229 | return short_name; | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | strbuf_release(&resolved_buf); | |
1234 | free(short_name); | |
1235 | return xstrdup(refname); | |
1236 | } | |
1237 | ||
1238 | static struct string_list *hide_refs; | |
1239 | ||
1240 | int parse_hide_refs_config(const char *var, const char *value, const char *section) | |
1241 | { | |
1242 | const char *key; | |
1243 | if (!strcmp("transfer.hiderefs", var) || | |
1244 | (!parse_config_key(var, section, NULL, NULL, &key) && | |
1245 | !strcmp(key, "hiderefs"))) { | |
1246 | char *ref; | |
1247 | int len; | |
1248 | ||
1249 | if (!value) | |
1250 | return config_error_nonbool(var); | |
1251 | ref = xstrdup(value); | |
1252 | len = strlen(ref); | |
1253 | while (len && ref[len - 1] == '/') | |
1254 | ref[--len] = '\0'; | |
1255 | if (!hide_refs) { | |
1256 | hide_refs = xcalloc(1, sizeof(*hide_refs)); | |
1257 | hide_refs->strdup_strings = 1; | |
1258 | } | |
1259 | string_list_append(hide_refs, ref); | |
1260 | } | |
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | int ref_is_hidden(const char *refname, const char *refname_full) | |
1265 | { | |
1266 | int i; | |
1267 | ||
1268 | if (!hide_refs) | |
1269 | return 0; | |
1270 | for (i = hide_refs->nr - 1; i >= 0; i--) { | |
1271 | const char *match = hide_refs->items[i].string; | |
1272 | const char *subject; | |
1273 | int neg = 0; | |
1274 | const char *p; | |
1275 | ||
1276 | if (*match == '!') { | |
1277 | neg = 1; | |
1278 | match++; | |
1279 | } | |
1280 | ||
1281 | if (*match == '^') { | |
1282 | subject = refname_full; | |
1283 | match++; | |
1284 | } else { | |
1285 | subject = refname; | |
1286 | } | |
1287 | ||
1288 | /* refname can be NULL when namespaces are used. */ | |
1289 | if (subject && | |
1290 | skip_prefix(subject, match, &p) && | |
1291 | (!*p || *p == '/')) | |
1292 | return !neg; | |
1293 | } | |
1294 | return 0; | |
1295 | } | |
1296 | ||
1297 | const char *find_descendant_ref(const char *dirname, | |
1298 | const struct string_list *extras, | |
1299 | const struct string_list *skip) | |
1300 | { | |
1301 | int pos; | |
1302 | ||
1303 | if (!extras) | |
1304 | return NULL; | |
1305 | ||
1306 | /* | |
1307 | * Look at the place where dirname would be inserted into | |
1308 | * extras. If there is an entry at that position that starts | |
1309 | * with dirname (remember, dirname includes the trailing | |
1310 | * slash) and is not in skip, then we have a conflict. | |
1311 | */ | |
1312 | for (pos = string_list_find_insert_index(extras, dirname, 0); | |
1313 | pos < extras->nr; pos++) { | |
1314 | const char *extra_refname = extras->items[pos].string; | |
1315 | ||
1316 | if (!starts_with(extra_refname, dirname)) | |
1317 | break; | |
1318 | ||
1319 | if (!skip || !string_list_has_string(skip, extra_refname)) | |
1320 | return extra_refname; | |
1321 | } | |
1322 | return NULL; | |
1323 | } | |
1324 | ||
1325 | int refs_rename_ref_available(struct ref_store *refs, | |
1326 | const char *old_refname, | |
1327 | const char *new_refname) | |
1328 | { | |
1329 | struct string_list skip = STRING_LIST_INIT_NODUP; | |
1330 | struct strbuf err = STRBUF_INIT; | |
1331 | int ok; | |
1332 | ||
1333 | string_list_insert(&skip, old_refname); | |
1334 | ok = !refs_verify_refname_available(refs, new_refname, | |
1335 | NULL, &skip, &err); | |
1336 | if (!ok) | |
1337 | error("%s", err.buf); | |
1338 | ||
1339 | string_list_clear(&skip, 0); | |
1340 | strbuf_release(&err); | |
1341 | return ok; | |
1342 | } | |
1343 | ||
1344 | int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
1345 | { | |
1346 | struct object_id oid; | |
1347 | int flag; | |
1348 | ||
1349 | if (!refs_read_ref_full(refs, "HEAD", RESOLVE_REF_READING, | |
1350 | &oid, &flag)) | |
1351 | return fn("HEAD", &oid, flag, cb_data); | |
1352 | ||
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | int head_ref(each_ref_fn fn, void *cb_data) | |
1357 | { | |
1358 | return refs_head_ref(get_main_ref_store(the_repository), fn, cb_data); | |
1359 | } | |
1360 | ||
1361 | struct ref_iterator *refs_ref_iterator_begin( | |
1362 | struct ref_store *refs, | |
1363 | const char *prefix, int trim, int flags) | |
1364 | { | |
1365 | struct ref_iterator *iter; | |
1366 | ||
1367 | if (ref_paranoia < 0) | |
1368 | ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 0); | |
1369 | if (ref_paranoia) | |
1370 | flags |= DO_FOR_EACH_INCLUDE_BROKEN; | |
1371 | ||
1372 | iter = refs->be->iterator_begin(refs, prefix, flags); | |
1373 | ||
1374 | /* | |
1375 | * `iterator_begin()` already takes care of prefix, but we | |
1376 | * might need to do some trimming: | |
1377 | */ | |
1378 | if (trim) | |
1379 | iter = prefix_ref_iterator_begin(iter, "", trim); | |
1380 | ||
1381 | /* Sanity check for subclasses: */ | |
1382 | if (!iter->ordered) | |
1383 | BUG("reference iterator is not ordered"); | |
1384 | ||
1385 | return iter; | |
1386 | } | |
1387 | ||
1388 | /* | |
1389 | * Call fn for each reference in the specified submodule for which the | |
1390 | * refname begins with prefix. If trim is non-zero, then trim that | |
1391 | * many characters off the beginning of each refname before passing | |
1392 | * the refname to fn. flags can be DO_FOR_EACH_INCLUDE_BROKEN to | |
1393 | * include broken references in the iteration. If fn ever returns a | |
1394 | * non-zero value, stop the iteration and return that value; | |
1395 | * otherwise, return 0. | |
1396 | */ | |
1397 | static int do_for_each_ref(struct ref_store *refs, const char *prefix, | |
1398 | each_ref_fn fn, int trim, int flags, void *cb_data) | |
1399 | { | |
1400 | struct ref_iterator *iter; | |
1401 | ||
1402 | if (!refs) | |
1403 | return 0; | |
1404 | ||
1405 | iter = refs_ref_iterator_begin(refs, prefix, trim, flags); | |
1406 | ||
1407 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1408 | } | |
1409 | ||
1410 | int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
1411 | { | |
1412 | return do_for_each_ref(refs, "", fn, 0, 0, cb_data); | |
1413 | } | |
1414 | ||
1415 | int for_each_ref(each_ref_fn fn, void *cb_data) | |
1416 | { | |
1417 | return refs_for_each_ref(get_main_ref_store(the_repository), fn, cb_data); | |
1418 | } | |
1419 | ||
1420 | int refs_for_each_ref_in(struct ref_store *refs, const char *prefix, | |
1421 | each_ref_fn fn, void *cb_data) | |
1422 | { | |
1423 | return do_for_each_ref(refs, prefix, fn, strlen(prefix), 0, cb_data); | |
1424 | } | |
1425 | ||
1426 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) | |
1427 | { | |
1428 | return refs_for_each_ref_in(get_main_ref_store(the_repository), prefix, fn, cb_data); | |
1429 | } | |
1430 | ||
1431 | int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken) | |
1432 | { | |
1433 | unsigned int flag = 0; | |
1434 | ||
1435 | if (broken) | |
1436 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
1437 | return do_for_each_ref(get_main_ref_store(the_repository), | |
1438 | prefix, fn, 0, flag, cb_data); | |
1439 | } | |
1440 | ||
1441 | int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix, | |
1442 | each_ref_fn fn, void *cb_data, | |
1443 | unsigned int broken) | |
1444 | { | |
1445 | unsigned int flag = 0; | |
1446 | ||
1447 | if (broken) | |
1448 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
1449 | return do_for_each_ref(refs, prefix, fn, 0, flag, cb_data); | |
1450 | } | |
1451 | ||
1452 | int for_each_replace_ref(struct repository *r, each_ref_fn fn, void *cb_data) | |
1453 | { | |
1454 | return do_for_each_ref(get_main_ref_store(r), | |
1455 | git_replace_ref_base, fn, | |
1456 | strlen(git_replace_ref_base), | |
1457 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
1458 | } | |
1459 | ||
1460 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
1461 | { | |
1462 | struct strbuf buf = STRBUF_INIT; | |
1463 | int ret; | |
1464 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
1465 | ret = do_for_each_ref(get_main_ref_store(the_repository), | |
1466 | buf.buf, fn, 0, 0, cb_data); | |
1467 | strbuf_release(&buf); | |
1468 | return ret; | |
1469 | } | |
1470 | ||
1471 | int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
1472 | { | |
1473 | return do_for_each_ref(refs, "", fn, 0, | |
1474 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
1475 | } | |
1476 | ||
1477 | int for_each_rawref(each_ref_fn fn, void *cb_data) | |
1478 | { | |
1479 | return refs_for_each_rawref(get_main_ref_store(the_repository), fn, cb_data); | |
1480 | } | |
1481 | ||
1482 | int refs_read_raw_ref(struct ref_store *ref_store, | |
1483 | const char *refname, struct object_id *oid, | |
1484 | struct strbuf *referent, unsigned int *type) | |
1485 | { | |
1486 | return ref_store->be->read_raw_ref(ref_store, refname, oid, referent, type); | |
1487 | } | |
1488 | ||
1489 | /* This function needs to return a meaningful errno on failure */ | |
1490 | const char *refs_resolve_ref_unsafe(struct ref_store *refs, | |
1491 | const char *refname, | |
1492 | int resolve_flags, | |
1493 | struct object_id *oid, int *flags) | |
1494 | { | |
1495 | static struct strbuf sb_refname = STRBUF_INIT; | |
1496 | struct object_id unused_oid; | |
1497 | int unused_flags; | |
1498 | int symref_count; | |
1499 | ||
1500 | if (!oid) | |
1501 | oid = &unused_oid; | |
1502 | if (!flags) | |
1503 | flags = &unused_flags; | |
1504 | ||
1505 | *flags = 0; | |
1506 | ||
1507 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1508 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1509 | !refname_is_safe(refname)) { | |
1510 | errno = EINVAL; | |
1511 | return NULL; | |
1512 | } | |
1513 | ||
1514 | /* | |
1515 | * dwim_ref() uses REF_ISBROKEN to distinguish between | |
1516 | * missing refs and refs that were present but invalid, | |
1517 | * to complain about the latter to stderr. | |
1518 | * | |
1519 | * We don't know whether the ref exists, so don't set | |
1520 | * REF_ISBROKEN yet. | |
1521 | */ | |
1522 | *flags |= REF_BAD_NAME; | |
1523 | } | |
1524 | ||
1525 | for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) { | |
1526 | unsigned int read_flags = 0; | |
1527 | ||
1528 | if (refs_read_raw_ref(refs, refname, | |
1529 | oid, &sb_refname, &read_flags)) { | |
1530 | *flags |= read_flags; | |
1531 | ||
1532 | /* In reading mode, refs must eventually resolve */ | |
1533 | if (resolve_flags & RESOLVE_REF_READING) | |
1534 | return NULL; | |
1535 | ||
1536 | /* | |
1537 | * Otherwise a missing ref is OK. But the files backend | |
1538 | * may show errors besides ENOENT if there are | |
1539 | * similarly-named refs. | |
1540 | */ | |
1541 | if (errno != ENOENT && | |
1542 | errno != EISDIR && | |
1543 | errno != ENOTDIR) | |
1544 | return NULL; | |
1545 | ||
1546 | oidclr(oid); | |
1547 | if (*flags & REF_BAD_NAME) | |
1548 | *flags |= REF_ISBROKEN; | |
1549 | return refname; | |
1550 | } | |
1551 | ||
1552 | *flags |= read_flags; | |
1553 | ||
1554 | if (!(read_flags & REF_ISSYMREF)) { | |
1555 | if (*flags & REF_BAD_NAME) { | |
1556 | oidclr(oid); | |
1557 | *flags |= REF_ISBROKEN; | |
1558 | } | |
1559 | return refname; | |
1560 | } | |
1561 | ||
1562 | refname = sb_refname.buf; | |
1563 | if (resolve_flags & RESOLVE_REF_NO_RECURSE) { | |
1564 | oidclr(oid); | |
1565 | return refname; | |
1566 | } | |
1567 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1568 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1569 | !refname_is_safe(refname)) { | |
1570 | errno = EINVAL; | |
1571 | return NULL; | |
1572 | } | |
1573 | ||
1574 | *flags |= REF_ISBROKEN | REF_BAD_NAME; | |
1575 | } | |
1576 | } | |
1577 | ||
1578 | errno = ELOOP; | |
1579 | return NULL; | |
1580 | } | |
1581 | ||
1582 | /* backend functions */ | |
1583 | int refs_init_db(struct strbuf *err) | |
1584 | { | |
1585 | struct ref_store *refs = get_main_ref_store(the_repository); | |
1586 | ||
1587 | return refs->be->init_db(refs, err); | |
1588 | } | |
1589 | ||
1590 | const char *resolve_ref_unsafe(const char *refname, int resolve_flags, | |
1591 | struct object_id *oid, int *flags) | |
1592 | { | |
1593 | return refs_resolve_ref_unsafe(get_main_ref_store(the_repository), refname, | |
1594 | resolve_flags, oid, flags); | |
1595 | } | |
1596 | ||
1597 | int resolve_gitlink_ref(const char *submodule, const char *refname, | |
1598 | struct object_id *oid) | |
1599 | { | |
1600 | struct ref_store *refs; | |
1601 | int flags; | |
1602 | ||
1603 | refs = get_submodule_ref_store(submodule); | |
1604 | ||
1605 | if (!refs) | |
1606 | return -1; | |
1607 | ||
1608 | if (!refs_resolve_ref_unsafe(refs, refname, 0, oid, &flags) || | |
1609 | is_null_oid(oid)) | |
1610 | return -1; | |
1611 | return 0; | |
1612 | } | |
1613 | ||
1614 | struct ref_store_hash_entry | |
1615 | { | |
1616 | struct hashmap_entry ent; /* must be the first member! */ | |
1617 | ||
1618 | struct ref_store *refs; | |
1619 | ||
1620 | /* NUL-terminated identifier of the ref store: */ | |
1621 | char name[FLEX_ARRAY]; | |
1622 | }; | |
1623 | ||
1624 | static int ref_store_hash_cmp(const void *unused_cmp_data, | |
1625 | const void *entry, const void *entry_or_key, | |
1626 | const void *keydata) | |
1627 | { | |
1628 | const struct ref_store_hash_entry *e1 = entry, *e2 = entry_or_key; | |
1629 | const char *name = keydata ? keydata : e2->name; | |
1630 | ||
1631 | return strcmp(e1->name, name); | |
1632 | } | |
1633 | ||
1634 | static struct ref_store_hash_entry *alloc_ref_store_hash_entry( | |
1635 | const char *name, struct ref_store *refs) | |
1636 | { | |
1637 | struct ref_store_hash_entry *entry; | |
1638 | ||
1639 | FLEX_ALLOC_STR(entry, name, name); | |
1640 | hashmap_entry_init(entry, strhash(name)); | |
1641 | entry->refs = refs; | |
1642 | return entry; | |
1643 | } | |
1644 | ||
1645 | /* A hashmap of ref_stores, stored by submodule name: */ | |
1646 | static struct hashmap submodule_ref_stores; | |
1647 | ||
1648 | /* A hashmap of ref_stores, stored by worktree id: */ | |
1649 | static struct hashmap worktree_ref_stores; | |
1650 | ||
1651 | /* | |
1652 | * Look up a ref store by name. If that ref_store hasn't been | |
1653 | * registered yet, return NULL. | |
1654 | */ | |
1655 | static struct ref_store *lookup_ref_store_map(struct hashmap *map, | |
1656 | const char *name) | |
1657 | { | |
1658 | struct ref_store_hash_entry *entry; | |
1659 | ||
1660 | if (!map->tablesize) | |
1661 | /* It's initialized on demand in register_ref_store(). */ | |
1662 | return NULL; | |
1663 | ||
1664 | entry = hashmap_get_from_hash(map, strhash(name), name); | |
1665 | return entry ? entry->refs : NULL; | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * Create, record, and return a ref_store instance for the specified | |
1670 | * gitdir. | |
1671 | */ | |
1672 | static struct ref_store *ref_store_init(const char *gitdir, | |
1673 | unsigned int flags) | |
1674 | { | |
1675 | const char *be_name = "files"; | |
1676 | struct ref_storage_be *be = find_ref_storage_backend(be_name); | |
1677 | struct ref_store *refs; | |
1678 | ||
1679 | if (!be) | |
1680 | BUG("reference backend %s is unknown", be_name); | |
1681 | ||
1682 | refs = be->init(gitdir, flags); | |
1683 | return refs; | |
1684 | } | |
1685 | ||
1686 | struct ref_store *get_main_ref_store(struct repository *r) | |
1687 | { | |
1688 | if (r->refs) | |
1689 | return r->refs; | |
1690 | ||
1691 | if (!r->gitdir) | |
1692 | BUG("attempting to get main_ref_store outside of repository"); | |
1693 | ||
1694 | r->refs = ref_store_init(r->gitdir, REF_STORE_ALL_CAPS); | |
1695 | return r->refs; | |
1696 | } | |
1697 | ||
1698 | /* | |
1699 | * Associate a ref store with a name. It is a fatal error to call this | |
1700 | * function twice for the same name. | |
1701 | */ | |
1702 | static void register_ref_store_map(struct hashmap *map, | |
1703 | const char *type, | |
1704 | struct ref_store *refs, | |
1705 | const char *name) | |
1706 | { | |
1707 | if (!map->tablesize) | |
1708 | hashmap_init(map, ref_store_hash_cmp, NULL, 0); | |
1709 | ||
1710 | if (hashmap_put(map, alloc_ref_store_hash_entry(name, refs))) | |
1711 | BUG("%s ref_store '%s' initialized twice", type, name); | |
1712 | } | |
1713 | ||
1714 | struct ref_store *get_submodule_ref_store(const char *submodule) | |
1715 | { | |
1716 | struct strbuf submodule_sb = STRBUF_INIT; | |
1717 | struct ref_store *refs; | |
1718 | char *to_free = NULL; | |
1719 | size_t len; | |
1720 | ||
1721 | if (!submodule) | |
1722 | return NULL; | |
1723 | ||
1724 | len = strlen(submodule); | |
1725 | while (len && is_dir_sep(submodule[len - 1])) | |
1726 | len--; | |
1727 | if (!len) | |
1728 | return NULL; | |
1729 | ||
1730 | if (submodule[len]) | |
1731 | /* We need to strip off one or more trailing slashes */ | |
1732 | submodule = to_free = xmemdupz(submodule, len); | |
1733 | ||
1734 | refs = lookup_ref_store_map(&submodule_ref_stores, submodule); | |
1735 | if (refs) | |
1736 | goto done; | |
1737 | ||
1738 | strbuf_addstr(&submodule_sb, submodule); | |
1739 | if (!is_nonbare_repository_dir(&submodule_sb)) | |
1740 | goto done; | |
1741 | ||
1742 | if (submodule_to_gitdir(&submodule_sb, submodule)) | |
1743 | goto done; | |
1744 | ||
1745 | /* assume that add_submodule_odb() has been called */ | |
1746 | refs = ref_store_init(submodule_sb.buf, | |
1747 | REF_STORE_READ | REF_STORE_ODB); | |
1748 | register_ref_store_map(&submodule_ref_stores, "submodule", | |
1749 | refs, submodule); | |
1750 | ||
1751 | done: | |
1752 | strbuf_release(&submodule_sb); | |
1753 | free(to_free); | |
1754 | ||
1755 | return refs; | |
1756 | } | |
1757 | ||
1758 | struct ref_store *get_worktree_ref_store(const struct worktree *wt) | |
1759 | { | |
1760 | struct ref_store *refs; | |
1761 | const char *id; | |
1762 | ||
1763 | if (wt->is_current) | |
1764 | return get_main_ref_store(the_repository); | |
1765 | ||
1766 | id = wt->id ? wt->id : "/"; | |
1767 | refs = lookup_ref_store_map(&worktree_ref_stores, id); | |
1768 | if (refs) | |
1769 | return refs; | |
1770 | ||
1771 | if (wt->id) | |
1772 | refs = ref_store_init(git_common_path("worktrees/%s", wt->id), | |
1773 | REF_STORE_ALL_CAPS); | |
1774 | else | |
1775 | refs = ref_store_init(get_git_common_dir(), | |
1776 | REF_STORE_ALL_CAPS); | |
1777 | ||
1778 | if (refs) | |
1779 | register_ref_store_map(&worktree_ref_stores, "worktree", | |
1780 | refs, id); | |
1781 | return refs; | |
1782 | } | |
1783 | ||
1784 | void base_ref_store_init(struct ref_store *refs, | |
1785 | const struct ref_storage_be *be) | |
1786 | { | |
1787 | refs->be = be; | |
1788 | } | |
1789 | ||
1790 | /* backend functions */ | |
1791 | int refs_pack_refs(struct ref_store *refs, unsigned int flags) | |
1792 | { | |
1793 | return refs->be->pack_refs(refs, flags); | |
1794 | } | |
1795 | ||
1796 | int refs_peel_ref(struct ref_store *refs, const char *refname, | |
1797 | struct object_id *oid) | |
1798 | { | |
1799 | int flag; | |
1800 | struct object_id base; | |
1801 | ||
1802 | if (current_ref_iter && current_ref_iter->refname == refname) { | |
1803 | struct object_id peeled; | |
1804 | ||
1805 | if (ref_iterator_peel(current_ref_iter, &peeled)) | |
1806 | return -1; | |
1807 | oidcpy(oid, &peeled); | |
1808 | return 0; | |
1809 | } | |
1810 | ||
1811 | if (refs_read_ref_full(refs, refname, | |
1812 | RESOLVE_REF_READING, &base, &flag)) | |
1813 | return -1; | |
1814 | ||
1815 | return peel_object(&base, oid); | |
1816 | } | |
1817 | ||
1818 | int peel_ref(const char *refname, struct object_id *oid) | |
1819 | { | |
1820 | return refs_peel_ref(get_main_ref_store(the_repository), refname, oid); | |
1821 | } | |
1822 | ||
1823 | int refs_create_symref(struct ref_store *refs, | |
1824 | const char *ref_target, | |
1825 | const char *refs_heads_master, | |
1826 | const char *logmsg) | |
1827 | { | |
1828 | return refs->be->create_symref(refs, ref_target, | |
1829 | refs_heads_master, | |
1830 | logmsg); | |
1831 | } | |
1832 | ||
1833 | int create_symref(const char *ref_target, const char *refs_heads_master, | |
1834 | const char *logmsg) | |
1835 | { | |
1836 | return refs_create_symref(get_main_ref_store(the_repository), ref_target, | |
1837 | refs_heads_master, logmsg); | |
1838 | } | |
1839 | ||
1840 | int ref_update_reject_duplicates(struct string_list *refnames, | |
1841 | struct strbuf *err) | |
1842 | { | |
1843 | size_t i, n = refnames->nr; | |
1844 | ||
1845 | assert(err); | |
1846 | ||
1847 | for (i = 1; i < n; i++) { | |
1848 | int cmp = strcmp(refnames->items[i - 1].string, | |
1849 | refnames->items[i].string); | |
1850 | ||
1851 | if (!cmp) { | |
1852 | strbuf_addf(err, | |
1853 | _("multiple updates for ref '%s' not allowed"), | |
1854 | refnames->items[i].string); | |
1855 | return 1; | |
1856 | } else if (cmp > 0) { | |
1857 | BUG("ref_update_reject_duplicates() received unsorted list"); | |
1858 | } | |
1859 | } | |
1860 | return 0; | |
1861 | } | |
1862 | ||
1863 | int ref_transaction_prepare(struct ref_transaction *transaction, | |
1864 | struct strbuf *err) | |
1865 | { | |
1866 | struct ref_store *refs = transaction->ref_store; | |
1867 | ||
1868 | switch (transaction->state) { | |
1869 | case REF_TRANSACTION_OPEN: | |
1870 | /* Good. */ | |
1871 | break; | |
1872 | case REF_TRANSACTION_PREPARED: | |
1873 | BUG("prepare called twice on reference transaction"); | |
1874 | break; | |
1875 | case REF_TRANSACTION_CLOSED: | |
1876 | BUG("prepare called on a closed reference transaction"); | |
1877 | break; | |
1878 | default: | |
1879 | BUG("unexpected reference transaction state"); | |
1880 | break; | |
1881 | } | |
1882 | ||
1883 | if (getenv(GIT_QUARANTINE_ENVIRONMENT)) { | |
1884 | strbuf_addstr(err, | |
1885 | _("ref updates forbidden inside quarantine environment")); | |
1886 | return -1; | |
1887 | } | |
1888 | ||
1889 | return refs->be->transaction_prepare(refs, transaction, err); | |
1890 | } | |
1891 | ||
1892 | int ref_transaction_abort(struct ref_transaction *transaction, | |
1893 | struct strbuf *err) | |
1894 | { | |
1895 | struct ref_store *refs = transaction->ref_store; | |
1896 | int ret = 0; | |
1897 | ||
1898 | switch (transaction->state) { | |
1899 | case REF_TRANSACTION_OPEN: | |
1900 | /* No need to abort explicitly. */ | |
1901 | break; | |
1902 | case REF_TRANSACTION_PREPARED: | |
1903 | ret = refs->be->transaction_abort(refs, transaction, err); | |
1904 | break; | |
1905 | case REF_TRANSACTION_CLOSED: | |
1906 | BUG("abort called on a closed reference transaction"); | |
1907 | break; | |
1908 | default: | |
1909 | BUG("unexpected reference transaction state"); | |
1910 | break; | |
1911 | } | |
1912 | ||
1913 | ref_transaction_free(transaction); | |
1914 | return ret; | |
1915 | } | |
1916 | ||
1917 | int ref_transaction_commit(struct ref_transaction *transaction, | |
1918 | struct strbuf *err) | |
1919 | { | |
1920 | struct ref_store *refs = transaction->ref_store; | |
1921 | int ret; | |
1922 | ||
1923 | switch (transaction->state) { | |
1924 | case REF_TRANSACTION_OPEN: | |
1925 | /* Need to prepare first. */ | |
1926 | ret = ref_transaction_prepare(transaction, err); | |
1927 | if (ret) | |
1928 | return ret; | |
1929 | break; | |
1930 | case REF_TRANSACTION_PREPARED: | |
1931 | /* Fall through to finish. */ | |
1932 | break; | |
1933 | case REF_TRANSACTION_CLOSED: | |
1934 | BUG("commit called on a closed reference transaction"); | |
1935 | break; | |
1936 | default: | |
1937 | BUG("unexpected reference transaction state"); | |
1938 | break; | |
1939 | } | |
1940 | ||
1941 | return refs->be->transaction_finish(refs, transaction, err); | |
1942 | } | |
1943 | ||
1944 | int refs_verify_refname_available(struct ref_store *refs, | |
1945 | const char *refname, | |
1946 | const struct string_list *extras, | |
1947 | const struct string_list *skip, | |
1948 | struct strbuf *err) | |
1949 | { | |
1950 | const char *slash; | |
1951 | const char *extra_refname; | |
1952 | struct strbuf dirname = STRBUF_INIT; | |
1953 | struct strbuf referent = STRBUF_INIT; | |
1954 | struct object_id oid; | |
1955 | unsigned int type; | |
1956 | struct ref_iterator *iter; | |
1957 | int ok; | |
1958 | int ret = -1; | |
1959 | ||
1960 | /* | |
1961 | * For the sake of comments in this function, suppose that | |
1962 | * refname is "refs/foo/bar". | |
1963 | */ | |
1964 | ||
1965 | assert(err); | |
1966 | ||
1967 | strbuf_grow(&dirname, strlen(refname) + 1); | |
1968 | for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) { | |
1969 | /* Expand dirname to the new prefix, not including the trailing slash: */ | |
1970 | strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len); | |
1971 | ||
1972 | /* | |
1973 | * We are still at a leading dir of the refname (e.g., | |
1974 | * "refs/foo"; if there is a reference with that name, | |
1975 | * it is a conflict, *unless* it is in skip. | |
1976 | */ | |
1977 | if (skip && string_list_has_string(skip, dirname.buf)) | |
1978 | continue; | |
1979 | ||
1980 | if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, &type)) { | |
1981 | strbuf_addf(err, _("'%s' exists; cannot create '%s'"), | |
1982 | dirname.buf, refname); | |
1983 | goto cleanup; | |
1984 | } | |
1985 | ||
1986 | if (extras && string_list_has_string(extras, dirname.buf)) { | |
1987 | strbuf_addf(err, _("cannot process '%s' and '%s' at the same time"), | |
1988 | refname, dirname.buf); | |
1989 | goto cleanup; | |
1990 | } | |
1991 | } | |
1992 | ||
1993 | /* | |
1994 | * We are at the leaf of our refname (e.g., "refs/foo/bar"). | |
1995 | * There is no point in searching for a reference with that | |
1996 | * name, because a refname isn't considered to conflict with | |
1997 | * itself. But we still need to check for references whose | |
1998 | * names are in the "refs/foo/bar/" namespace, because they | |
1999 | * *do* conflict. | |
2000 | */ | |
2001 | strbuf_addstr(&dirname, refname + dirname.len); | |
2002 | strbuf_addch(&dirname, '/'); | |
2003 | ||
2004 | iter = refs_ref_iterator_begin(refs, dirname.buf, 0, | |
2005 | DO_FOR_EACH_INCLUDE_BROKEN); | |
2006 | while ((ok = ref_iterator_advance(iter)) == ITER_OK) { | |
2007 | if (skip && | |
2008 | string_list_has_string(skip, iter->refname)) | |
2009 | continue; | |
2010 | ||
2011 | strbuf_addf(err, _("'%s' exists; cannot create '%s'"), | |
2012 | iter->refname, refname); | |
2013 | ref_iterator_abort(iter); | |
2014 | goto cleanup; | |
2015 | } | |
2016 | ||
2017 | if (ok != ITER_DONE) | |
2018 | BUG("error while iterating over references"); | |
2019 | ||
2020 | extra_refname = find_descendant_ref(dirname.buf, extras, skip); | |
2021 | if (extra_refname) | |
2022 | strbuf_addf(err, _("cannot process '%s' and '%s' at the same time"), | |
2023 | refname, extra_refname); | |
2024 | else | |
2025 | ret = 0; | |
2026 | ||
2027 | cleanup: | |
2028 | strbuf_release(&referent); | |
2029 | strbuf_release(&dirname); | |
2030 | return ret; | |
2031 | } | |
2032 | ||
2033 | int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
2034 | { | |
2035 | struct ref_iterator *iter; | |
2036 | ||
2037 | iter = refs->be->reflog_iterator_begin(refs); | |
2038 | ||
2039 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
2040 | } | |
2041 | ||
2042 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
2043 | { | |
2044 | return refs_for_each_reflog(get_main_ref_store(the_repository), fn, cb_data); | |
2045 | } | |
2046 | ||
2047 | int refs_for_each_reflog_ent_reverse(struct ref_store *refs, | |
2048 | const char *refname, | |
2049 | each_reflog_ent_fn fn, | |
2050 | void *cb_data) | |
2051 | { | |
2052 | return refs->be->for_each_reflog_ent_reverse(refs, refname, | |
2053 | fn, cb_data); | |
2054 | } | |
2055 | ||
2056 | int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, | |
2057 | void *cb_data) | |
2058 | { | |
2059 | return refs_for_each_reflog_ent_reverse(get_main_ref_store(the_repository), | |
2060 | refname, fn, cb_data); | |
2061 | } | |
2062 | ||
2063 | int refs_for_each_reflog_ent(struct ref_store *refs, const char *refname, | |
2064 | each_reflog_ent_fn fn, void *cb_data) | |
2065 | { | |
2066 | return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data); | |
2067 | } | |
2068 | ||
2069 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, | |
2070 | void *cb_data) | |
2071 | { | |
2072 | return refs_for_each_reflog_ent(get_main_ref_store(the_repository), refname, | |
2073 | fn, cb_data); | |
2074 | } | |
2075 | ||
2076 | int refs_reflog_exists(struct ref_store *refs, const char *refname) | |
2077 | { | |
2078 | return refs->be->reflog_exists(refs, refname); | |
2079 | } | |
2080 | ||
2081 | int reflog_exists(const char *refname) | |
2082 | { | |
2083 | return refs_reflog_exists(get_main_ref_store(the_repository), refname); | |
2084 | } | |
2085 | ||
2086 | int refs_create_reflog(struct ref_store *refs, const char *refname, | |
2087 | int force_create, struct strbuf *err) | |
2088 | { | |
2089 | return refs->be->create_reflog(refs, refname, force_create, err); | |
2090 | } | |
2091 | ||
2092 | int safe_create_reflog(const char *refname, int force_create, | |
2093 | struct strbuf *err) | |
2094 | { | |
2095 | return refs_create_reflog(get_main_ref_store(the_repository), refname, | |
2096 | force_create, err); | |
2097 | } | |
2098 | ||
2099 | int refs_delete_reflog(struct ref_store *refs, const char *refname) | |
2100 | { | |
2101 | return refs->be->delete_reflog(refs, refname); | |
2102 | } | |
2103 | ||
2104 | int delete_reflog(const char *refname) | |
2105 | { | |
2106 | return refs_delete_reflog(get_main_ref_store(the_repository), refname); | |
2107 | } | |
2108 | ||
2109 | int refs_reflog_expire(struct ref_store *refs, | |
2110 | const char *refname, const struct object_id *oid, | |
2111 | unsigned int flags, | |
2112 | reflog_expiry_prepare_fn prepare_fn, | |
2113 | reflog_expiry_should_prune_fn should_prune_fn, | |
2114 | reflog_expiry_cleanup_fn cleanup_fn, | |
2115 | void *policy_cb_data) | |
2116 | { | |
2117 | return refs->be->reflog_expire(refs, refname, oid, flags, | |
2118 | prepare_fn, should_prune_fn, | |
2119 | cleanup_fn, policy_cb_data); | |
2120 | } | |
2121 | ||
2122 | int reflog_expire(const char *refname, const struct object_id *oid, | |
2123 | unsigned int flags, | |
2124 | reflog_expiry_prepare_fn prepare_fn, | |
2125 | reflog_expiry_should_prune_fn should_prune_fn, | |
2126 | reflog_expiry_cleanup_fn cleanup_fn, | |
2127 | void *policy_cb_data) | |
2128 | { | |
2129 | return refs_reflog_expire(get_main_ref_store(the_repository), | |
2130 | refname, oid, flags, | |
2131 | prepare_fn, should_prune_fn, | |
2132 | cleanup_fn, policy_cb_data); | |
2133 | } | |
2134 | ||
2135 | int initial_ref_transaction_commit(struct ref_transaction *transaction, | |
2136 | struct strbuf *err) | |
2137 | { | |
2138 | struct ref_store *refs = transaction->ref_store; | |
2139 | ||
2140 | return refs->be->initial_transaction_commit(refs, transaction, err); | |
2141 | } | |
2142 | ||
2143 | int refs_delete_refs(struct ref_store *refs, const char *msg, | |
2144 | struct string_list *refnames, unsigned int flags) | |
2145 | { | |
2146 | return refs->be->delete_refs(refs, msg, refnames, flags); | |
2147 | } | |
2148 | ||
2149 | int delete_refs(const char *msg, struct string_list *refnames, | |
2150 | unsigned int flags) | |
2151 | { | |
2152 | return refs_delete_refs(get_main_ref_store(the_repository), msg, refnames, flags); | |
2153 | } | |
2154 | ||
2155 | int refs_rename_ref(struct ref_store *refs, const char *oldref, | |
2156 | const char *newref, const char *logmsg) | |
2157 | { | |
2158 | return refs->be->rename_ref(refs, oldref, newref, logmsg); | |
2159 | } | |
2160 | ||
2161 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) | |
2162 | { | |
2163 | return refs_rename_ref(get_main_ref_store(the_repository), oldref, newref, logmsg); | |
2164 | } | |
2165 | ||
2166 | int refs_copy_existing_ref(struct ref_store *refs, const char *oldref, | |
2167 | const char *newref, const char *logmsg) | |
2168 | { | |
2169 | return refs->be->copy_ref(refs, oldref, newref, logmsg); | |
2170 | } | |
2171 | ||
2172 | int copy_existing_ref(const char *oldref, const char *newref, const char *logmsg) | |
2173 | { | |
2174 | return refs_copy_existing_ref(get_main_ref_store(the_repository), oldref, newref, logmsg); | |
2175 | } |