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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.h" | |
13 | #include "tag.h" | |
14 | #include "submodule.h" | |
15 | #include "worktree.h" | |
16 | #include "repository.h" | |
17 | ||
18 | /* | |
19 | * List of all available backends | |
20 | */ | |
21 | static struct ref_storage_be *refs_backends = &refs_be_files; | |
22 | ||
23 | static struct ref_storage_be *find_ref_storage_backend(const char *name) | |
24 | { | |
25 | struct ref_storage_be *be; | |
26 | for (be = refs_backends; be; be = be->next) | |
27 | if (!strcmp(be->name, name)) | |
28 | return be; | |
29 | return NULL; | |
30 | } | |
31 | ||
32 | int ref_storage_backend_exists(const char *name) | |
33 | { | |
34 | return find_ref_storage_backend(name) != NULL; | |
35 | } | |
36 | ||
37 | /* | |
38 | * How to handle various characters in refnames: | |
39 | * 0: An acceptable character for refs | |
40 | * 1: End-of-component | |
41 | * 2: ., look for a preceding . to reject .. in refs | |
42 | * 3: {, look for a preceding @ to reject @{ in refs | |
43 | * 4: A bad character: ASCII control characters, and | |
44 | * ":", "?", "[", "\", "^", "~", SP, or TAB | |
45 | * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set | |
46 | */ | |
47 | static unsigned char refname_disposition[256] = { | |
48 | 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
49 | 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
50 | 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1, | |
51 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4, | |
52 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
53 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0, | |
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, 3, 0, 0, 4, 4 | |
56 | }; | |
57 | ||
58 | /* | |
59 | * Try to read one refname component from the front of refname. | |
60 | * Return the length of the component found, or -1 if the component is | |
61 | * not legal. It is legal if it is something reasonable to have under | |
62 | * ".git/refs/"; We do not like it if: | |
63 | * | |
64 | * - any path component of it begins with ".", or | |
65 | * - it has double dots "..", or | |
66 | * - it has ASCII control characters, or | |
67 | * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or | |
68 | * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or | |
69 | * - it ends with a "/", or | |
70 | * - it ends with ".lock", or | |
71 | * - it contains a "@{" portion | |
72 | */ | |
73 | static int check_refname_component(const char *refname, int *flags) | |
74 | { | |
75 | const char *cp; | |
76 | char last = '\0'; | |
77 | ||
78 | for (cp = refname; ; cp++) { | |
79 | int ch = *cp & 255; | |
80 | unsigned char disp = refname_disposition[ch]; | |
81 | switch (disp) { | |
82 | case 1: | |
83 | goto out; | |
84 | case 2: | |
85 | if (last == '.') | |
86 | return -1; /* Refname contains "..". */ | |
87 | break; | |
88 | case 3: | |
89 | if (last == '@') | |
90 | return -1; /* Refname contains "@{". */ | |
91 | break; | |
92 | case 4: | |
93 | return -1; | |
94 | case 5: | |
95 | if (!(*flags & REFNAME_REFSPEC_PATTERN)) | |
96 | return -1; /* refspec can't be a pattern */ | |
97 | ||
98 | /* | |
99 | * Unset the pattern flag so that we only accept | |
100 | * a single asterisk for one side of refspec. | |
101 | */ | |
102 | *flags &= ~ REFNAME_REFSPEC_PATTERN; | |
103 | break; | |
104 | } | |
105 | last = ch; | |
106 | } | |
107 | out: | |
108 | if (cp == refname) | |
109 | return 0; /* Component has zero length. */ | |
110 | if (refname[0] == '.') | |
111 | return -1; /* Component starts with '.'. */ | |
112 | if (cp - refname >= LOCK_SUFFIX_LEN && | |
113 | !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN)) | |
114 | return -1; /* Refname ends with ".lock". */ | |
115 | return cp - refname; | |
116 | } | |
117 | ||
118 | int check_refname_format(const char *refname, int flags) | |
119 | { | |
120 | int component_len, component_count = 0; | |
121 | ||
122 | if (!strcmp(refname, "@")) | |
123 | /* Refname is a single character '@'. */ | |
124 | return -1; | |
125 | ||
126 | while (1) { | |
127 | /* We are at the start of a path component. */ | |
128 | component_len = check_refname_component(refname, &flags); | |
129 | if (component_len <= 0) | |
130 | return -1; | |
131 | ||
132 | component_count++; | |
133 | if (refname[component_len] == '\0') | |
134 | break; | |
135 | /* Skip to next component. */ | |
136 | refname += component_len + 1; | |
137 | } | |
138 | ||
139 | if (refname[component_len - 1] == '.') | |
140 | return -1; /* Refname ends with '.'. */ | |
141 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) | |
142 | return -1; /* Refname has only one component. */ | |
143 | return 0; | |
144 | } | |
145 | ||
146 | int refname_is_safe(const char *refname) | |
147 | { | |
148 | const char *rest; | |
149 | ||
150 | if (skip_prefix(refname, "refs/", &rest)) { | |
151 | char *buf; | |
152 | int result; | |
153 | size_t restlen = strlen(rest); | |
154 | ||
155 | /* rest must not be empty, or start or end with "/" */ | |
156 | if (!restlen || *rest == '/' || rest[restlen - 1] == '/') | |
157 | return 0; | |
158 | ||
159 | /* | |
160 | * Does the refname try to escape refs/? | |
161 | * For example: refs/foo/../bar is safe but refs/foo/../../bar | |
162 | * is not. | |
163 | */ | |
164 | buf = xmallocz(restlen); | |
165 | result = !normalize_path_copy(buf, rest) && !strcmp(buf, rest); | |
166 | free(buf); | |
167 | return result; | |
168 | } | |
169 | ||
170 | do { | |
171 | if (!isupper(*refname) && *refname != '_') | |
172 | return 0; | |
173 | refname++; | |
174 | } while (*refname); | |
175 | return 1; | |
176 | } | |
177 | ||
178 | /* | |
179 | * Return true if refname, which has the specified oid and flags, can | |
180 | * be resolved to an object in the database. If the referred-to object | |
181 | * does not exist, emit a warning and return false. | |
182 | */ | |
183 | int ref_resolves_to_object(const char *refname, | |
184 | const struct object_id *oid, | |
185 | unsigned int flags) | |
186 | { | |
187 | if (flags & REF_ISBROKEN) | |
188 | return 0; | |
189 | if (!has_sha1_file(oid->hash)) { | |
190 | error("%s does not point to a valid object!", refname); | |
191 | return 0; | |
192 | } | |
193 | return 1; | |
194 | } | |
195 | ||
196 | char *refs_resolve_refdup(struct ref_store *refs, | |
197 | const char *refname, int resolve_flags, | |
198 | struct object_id *oid, int *flags) | |
199 | { | |
200 | const char *result; | |
201 | ||
202 | result = refs_resolve_ref_unsafe(refs, refname, resolve_flags, | |
203 | oid, flags); | |
204 | return xstrdup_or_null(result); | |
205 | } | |
206 | ||
207 | char *resolve_refdup(const char *refname, int resolve_flags, | |
208 | struct object_id *oid, int *flags) | |
209 | { | |
210 | return refs_resolve_refdup(get_main_ref_store(the_repository), | |
211 | refname, resolve_flags, | |
212 | oid, flags); | |
213 | } | |
214 | ||
215 | /* The argument to filter_refs */ | |
216 | struct ref_filter { | |
217 | const char *pattern; | |
218 | each_ref_fn *fn; | |
219 | void *cb_data; | |
220 | }; | |
221 | ||
222 | int refs_read_ref_full(struct ref_store *refs, const char *refname, | |
223 | int resolve_flags, struct object_id *oid, int *flags) | |
224 | { | |
225 | if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, oid, flags)) | |
226 | return 0; | |
227 | return -1; | |
228 | } | |
229 | ||
230 | int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags) | |
231 | { | |
232 | return refs_read_ref_full(get_main_ref_store(the_repository), refname, | |
233 | resolve_flags, oid, flags); | |
234 | } | |
235 | ||
236 | int read_ref(const char *refname, struct object_id *oid) | |
237 | { | |
238 | return read_ref_full(refname, RESOLVE_REF_READING, oid, NULL); | |
239 | } | |
240 | ||
241 | int ref_exists(const char *refname) | |
242 | { | |
243 | return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, NULL, NULL); | |
244 | } | |
245 | ||
246 | static int match_ref_pattern(const char *refname, | |
247 | const struct string_list_item *item) | |
248 | { | |
249 | int matched = 0; | |
250 | if (item->util == NULL) { | |
251 | if (!wildmatch(item->string, refname, 0)) | |
252 | matched = 1; | |
253 | } else { | |
254 | const char *rest; | |
255 | if (skip_prefix(refname, item->string, &rest) && | |
256 | (!*rest || *rest == '/')) | |
257 | matched = 1; | |
258 | } | |
259 | return matched; | |
260 | } | |
261 | ||
262 | int ref_filter_match(const char *refname, | |
263 | const struct string_list *include_patterns, | |
264 | const struct string_list *exclude_patterns) | |
265 | { | |
266 | struct string_list_item *item; | |
267 | ||
268 | if (exclude_patterns && exclude_patterns->nr) { | |
269 | for_each_string_list_item(item, exclude_patterns) { | |
270 | if (match_ref_pattern(refname, item)) | |
271 | return 0; | |
272 | } | |
273 | } | |
274 | ||
275 | if (include_patterns && include_patterns->nr) { | |
276 | int found = 0; | |
277 | for_each_string_list_item(item, include_patterns) { | |
278 | if (match_ref_pattern(refname, item)) { | |
279 | found = 1; | |
280 | break; | |
281 | } | |
282 | } | |
283 | ||
284 | if (!found) | |
285 | return 0; | |
286 | } | |
287 | return 1; | |
288 | } | |
289 | ||
290 | static int filter_refs(const char *refname, const struct object_id *oid, | |
291 | int flags, void *data) | |
292 | { | |
293 | struct ref_filter *filter = (struct ref_filter *)data; | |
294 | ||
295 | if (wildmatch(filter->pattern, refname, 0)) | |
296 | return 0; | |
297 | return filter->fn(refname, oid, flags, filter->cb_data); | |
298 | } | |
299 | ||
300 | enum peel_status peel_object(const struct object_id *name, struct object_id *oid) | |
301 | { | |
302 | struct object *o = lookup_unknown_object(name->hash); | |
303 | ||
304 | if (o->type == OBJ_NONE) { | |
305 | int type = oid_object_info(name, NULL); | |
306 | if (type < 0 || !object_as_type(o, type, 0)) | |
307 | return PEEL_INVALID; | |
308 | } | |
309 | ||
310 | if (o->type != OBJ_TAG) | |
311 | return PEEL_NON_TAG; | |
312 | ||
313 | o = deref_tag_noverify(o); | |
314 | if (!o) | |
315 | return PEEL_INVALID; | |
316 | ||
317 | oidcpy(oid, &o->oid); | |
318 | return PEEL_PEELED; | |
319 | } | |
320 | ||
321 | struct warn_if_dangling_data { | |
322 | FILE *fp; | |
323 | const char *refname; | |
324 | const struct string_list *refnames; | |
325 | const char *msg_fmt; | |
326 | }; | |
327 | ||
328 | static int warn_if_dangling_symref(const char *refname, const struct object_id *oid, | |
329 | int flags, void *cb_data) | |
330 | { | |
331 | struct warn_if_dangling_data *d = cb_data; | |
332 | const char *resolves_to; | |
333 | ||
334 | if (!(flags & REF_ISSYMREF)) | |
335 | return 0; | |
336 | ||
337 | resolves_to = resolve_ref_unsafe(refname, 0, NULL, NULL); | |
338 | if (!resolves_to | |
339 | || (d->refname | |
340 | ? strcmp(resolves_to, d->refname) | |
341 | : !string_list_has_string(d->refnames, resolves_to))) { | |
342 | return 0; | |
343 | } | |
344 | ||
345 | fprintf(d->fp, d->msg_fmt, refname); | |
346 | fputc('\n', d->fp); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) | |
351 | { | |
352 | struct warn_if_dangling_data data; | |
353 | ||
354 | data.fp = fp; | |
355 | data.refname = refname; | |
356 | data.refnames = NULL; | |
357 | data.msg_fmt = msg_fmt; | |
358 | for_each_rawref(warn_if_dangling_symref, &data); | |
359 | } | |
360 | ||
361 | void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames) | |
362 | { | |
363 | struct warn_if_dangling_data data; | |
364 | ||
365 | data.fp = fp; | |
366 | data.refname = NULL; | |
367 | data.refnames = refnames; | |
368 | data.msg_fmt = msg_fmt; | |
369 | for_each_rawref(warn_if_dangling_symref, &data); | |
370 | } | |
371 | ||
372 | int refs_for_each_tag_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
373 | { | |
374 | return refs_for_each_ref_in(refs, "refs/tags/", fn, cb_data); | |
375 | } | |
376 | ||
377 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) | |
378 | { | |
379 | return refs_for_each_tag_ref(get_main_ref_store(the_repository), fn, cb_data); | |
380 | } | |
381 | ||
382 | int refs_for_each_branch_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
383 | { | |
384 | return refs_for_each_ref_in(refs, "refs/heads/", fn, cb_data); | |
385 | } | |
386 | ||
387 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) | |
388 | { | |
389 | return refs_for_each_branch_ref(get_main_ref_store(the_repository), fn, cb_data); | |
390 | } | |
391 | ||
392 | int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
393 | { | |
394 | return refs_for_each_ref_in(refs, "refs/remotes/", fn, cb_data); | |
395 | } | |
396 | ||
397 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) | |
398 | { | |
399 | return refs_for_each_remote_ref(get_main_ref_store(the_repository), fn, cb_data); | |
400 | } | |
401 | ||
402 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) | |
403 | { | |
404 | struct strbuf buf = STRBUF_INIT; | |
405 | int ret = 0; | |
406 | struct object_id oid; | |
407 | int flag; | |
408 | ||
409 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); | |
410 | if (!read_ref_full(buf.buf, RESOLVE_REF_READING, &oid, &flag)) | |
411 | ret = fn(buf.buf, &oid, flag, cb_data); | |
412 | strbuf_release(&buf); | |
413 | ||
414 | return ret; | |
415 | } | |
416 | ||
417 | void normalize_glob_ref(struct string_list_item *item, const char *prefix, | |
418 | const char *pattern) | |
419 | { | |
420 | struct strbuf normalized_pattern = STRBUF_INIT; | |
421 | ||
422 | if (*pattern == '/') | |
423 | BUG("pattern must not start with '/'"); | |
424 | ||
425 | if (prefix) { | |
426 | strbuf_addstr(&normalized_pattern, prefix); | |
427 | } | |
428 | else if (!starts_with(pattern, "refs/")) | |
429 | strbuf_addstr(&normalized_pattern, "refs/"); | |
430 | strbuf_addstr(&normalized_pattern, pattern); | |
431 | strbuf_strip_suffix(&normalized_pattern, "/"); | |
432 | ||
433 | item->string = strbuf_detach(&normalized_pattern, NULL); | |
434 | item->util = has_glob_specials(pattern) ? NULL : item->string; | |
435 | strbuf_release(&normalized_pattern); | |
436 | } | |
437 | ||
438 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, | |
439 | const char *prefix, void *cb_data) | |
440 | { | |
441 | struct strbuf real_pattern = STRBUF_INIT; | |
442 | struct ref_filter filter; | |
443 | int ret; | |
444 | ||
445 | if (!prefix && !starts_with(pattern, "refs/")) | |
446 | strbuf_addstr(&real_pattern, "refs/"); | |
447 | else if (prefix) | |
448 | strbuf_addstr(&real_pattern, prefix); | |
449 | strbuf_addstr(&real_pattern, pattern); | |
450 | ||
451 | if (!has_glob_specials(pattern)) { | |
452 | /* Append implied '/' '*' if not present. */ | |
453 | strbuf_complete(&real_pattern, '/'); | |
454 | /* No need to check for '*', there is none. */ | |
455 | strbuf_addch(&real_pattern, '*'); | |
456 | } | |
457 | ||
458 | filter.pattern = real_pattern.buf; | |
459 | filter.fn = fn; | |
460 | filter.cb_data = cb_data; | |
461 | ret = for_each_ref(filter_refs, &filter); | |
462 | ||
463 | strbuf_release(&real_pattern); | |
464 | return ret; | |
465 | } | |
466 | ||
467 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) | |
468 | { | |
469 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
470 | } | |
471 | ||
472 | const char *prettify_refname(const char *name) | |
473 | { | |
474 | if (skip_prefix(name, "refs/heads/", &name) || | |
475 | skip_prefix(name, "refs/tags/", &name) || | |
476 | skip_prefix(name, "refs/remotes/", &name)) | |
477 | ; /* nothing */ | |
478 | return name; | |
479 | } | |
480 | ||
481 | static const char *ref_rev_parse_rules[] = { | |
482 | "%.*s", | |
483 | "refs/%.*s", | |
484 | "refs/tags/%.*s", | |
485 | "refs/heads/%.*s", | |
486 | "refs/remotes/%.*s", | |
487 | "refs/remotes/%.*s/HEAD", | |
488 | NULL | |
489 | }; | |
490 | ||
491 | int refname_match(const char *abbrev_name, const char *full_name) | |
492 | { | |
493 | const char **p; | |
494 | const int abbrev_name_len = strlen(abbrev_name); | |
495 | ||
496 | for (p = ref_rev_parse_rules; *p; p++) { | |
497 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { | |
498 | return 1; | |
499 | } | |
500 | } | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
505 | /* | |
506 | * *string and *len will only be substituted, and *string returned (for | |
507 | * later free()ing) if the string passed in is a magic short-hand form | |
508 | * to name a branch. | |
509 | */ | |
510 | static char *substitute_branch_name(const char **string, int *len) | |
511 | { | |
512 | struct strbuf buf = STRBUF_INIT; | |
513 | int ret = interpret_branch_name(*string, *len, &buf, 0); | |
514 | ||
515 | if (ret == *len) { | |
516 | size_t size; | |
517 | *string = strbuf_detach(&buf, &size); | |
518 | *len = size; | |
519 | return (char *)*string; | |
520 | } | |
521 | ||
522 | return NULL; | |
523 | } | |
524 | ||
525 | int dwim_ref(const char *str, int len, struct object_id *oid, char **ref) | |
526 | { | |
527 | char *last_branch = substitute_branch_name(&str, &len); | |
528 | int refs_found = expand_ref(str, len, oid, ref); | |
529 | free(last_branch); | |
530 | return refs_found; | |
531 | } | |
532 | ||
533 | int expand_ref(const char *str, int len, struct object_id *oid, char **ref) | |
534 | { | |
535 | const char **p, *r; | |
536 | int refs_found = 0; | |
537 | struct strbuf fullref = STRBUF_INIT; | |
538 | ||
539 | *ref = NULL; | |
540 | for (p = ref_rev_parse_rules; *p; p++) { | |
541 | struct object_id oid_from_ref; | |
542 | struct object_id *this_result; | |
543 | int flag; | |
544 | ||
545 | this_result = refs_found ? &oid_from_ref : oid; | |
546 | strbuf_reset(&fullref); | |
547 | strbuf_addf(&fullref, *p, len, str); | |
548 | r = resolve_ref_unsafe(fullref.buf, RESOLVE_REF_READING, | |
549 | this_result, &flag); | |
550 | if (r) { | |
551 | if (!refs_found++) | |
552 | *ref = xstrdup(r); | |
553 | if (!warn_ambiguous_refs) | |
554 | break; | |
555 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) { | |
556 | warning("ignoring dangling symref %s.", fullref.buf); | |
557 | } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) { | |
558 | warning("ignoring broken ref %s.", fullref.buf); | |
559 | } | |
560 | } | |
561 | strbuf_release(&fullref); | |
562 | return refs_found; | |
563 | } | |
564 | ||
565 | int dwim_log(const char *str, int len, struct object_id *oid, char **log) | |
566 | { | |
567 | char *last_branch = substitute_branch_name(&str, &len); | |
568 | const char **p; | |
569 | int logs_found = 0; | |
570 | struct strbuf path = STRBUF_INIT; | |
571 | ||
572 | *log = NULL; | |
573 | for (p = ref_rev_parse_rules; *p; p++) { | |
574 | struct object_id hash; | |
575 | const char *ref, *it; | |
576 | ||
577 | strbuf_reset(&path); | |
578 | strbuf_addf(&path, *p, len, str); | |
579 | ref = resolve_ref_unsafe(path.buf, RESOLVE_REF_READING, | |
580 | &hash, NULL); | |
581 | if (!ref) | |
582 | continue; | |
583 | if (reflog_exists(path.buf)) | |
584 | it = path.buf; | |
585 | else if (strcmp(ref, path.buf) && reflog_exists(ref)) | |
586 | it = ref; | |
587 | else | |
588 | continue; | |
589 | if (!logs_found++) { | |
590 | *log = xstrdup(it); | |
591 | oidcpy(oid, &hash); | |
592 | } | |
593 | if (!warn_ambiguous_refs) | |
594 | break; | |
595 | } | |
596 | strbuf_release(&path); | |
597 | free(last_branch); | |
598 | return logs_found; | |
599 | } | |
600 | ||
601 | static int is_per_worktree_ref(const char *refname) | |
602 | { | |
603 | return !strcmp(refname, "HEAD") || | |
604 | starts_with(refname, "refs/bisect/"); | |
605 | } | |
606 | ||
607 | static int is_pseudoref_syntax(const char *refname) | |
608 | { | |
609 | const char *c; | |
610 | ||
611 | for (c = refname; *c; c++) { | |
612 | if (!isupper(*c) && *c != '-' && *c != '_') | |
613 | return 0; | |
614 | } | |
615 | ||
616 | return 1; | |
617 | } | |
618 | ||
619 | enum ref_type ref_type(const char *refname) | |
620 | { | |
621 | if (is_per_worktree_ref(refname)) | |
622 | return REF_TYPE_PER_WORKTREE; | |
623 | if (is_pseudoref_syntax(refname)) | |
624 | return REF_TYPE_PSEUDOREF; | |
625 | return REF_TYPE_NORMAL; | |
626 | } | |
627 | ||
628 | long get_files_ref_lock_timeout_ms(void) | |
629 | { | |
630 | static int configured = 0; | |
631 | ||
632 | /* The default timeout is 100 ms: */ | |
633 | static int timeout_ms = 100; | |
634 | ||
635 | if (!configured) { | |
636 | git_config_get_int("core.filesreflocktimeout", &timeout_ms); | |
637 | configured = 1; | |
638 | } | |
639 | ||
640 | return timeout_ms; | |
641 | } | |
642 | ||
643 | static int write_pseudoref(const char *pseudoref, const struct object_id *oid, | |
644 | const struct object_id *old_oid, struct strbuf *err) | |
645 | { | |
646 | const char *filename; | |
647 | int fd; | |
648 | static struct lock_file lock; | |
649 | struct strbuf buf = STRBUF_INIT; | |
650 | int ret = -1; | |
651 | ||
652 | if (!oid) | |
653 | return 0; | |
654 | ||
655 | strbuf_addf(&buf, "%s\n", oid_to_hex(oid)); | |
656 | ||
657 | filename = git_path("%s", pseudoref); | |
658 | fd = hold_lock_file_for_update_timeout(&lock, filename, | |
659 | LOCK_DIE_ON_ERROR, | |
660 | get_files_ref_lock_timeout_ms()); | |
661 | if (fd < 0) { | |
662 | strbuf_addf(err, "could not open '%s' for writing: %s", | |
663 | filename, strerror(errno)); | |
664 | goto done; | |
665 | } | |
666 | ||
667 | if (old_oid) { | |
668 | struct object_id actual_old_oid; | |
669 | ||
670 | if (read_ref(pseudoref, &actual_old_oid)) | |
671 | die("could not read ref '%s'", pseudoref); | |
672 | if (oidcmp(&actual_old_oid, old_oid)) { | |
673 | strbuf_addf(err, "unexpected sha1 when writing '%s'", pseudoref); | |
674 | rollback_lock_file(&lock); | |
675 | goto done; | |
676 | } | |
677 | } | |
678 | ||
679 | if (write_in_full(fd, buf.buf, buf.len) < 0) { | |
680 | strbuf_addf(err, "could not write to '%s'", filename); | |
681 | rollback_lock_file(&lock); | |
682 | goto done; | |
683 | } | |
684 | ||
685 | commit_lock_file(&lock); | |
686 | ret = 0; | |
687 | done: | |
688 | strbuf_release(&buf); | |
689 | return ret; | |
690 | } | |
691 | ||
692 | static int delete_pseudoref(const char *pseudoref, const struct object_id *old_oid) | |
693 | { | |
694 | static struct lock_file lock; | |
695 | const char *filename; | |
696 | ||
697 | filename = git_path("%s", pseudoref); | |
698 | ||
699 | if (old_oid && !is_null_oid(old_oid)) { | |
700 | int fd; | |
701 | struct object_id actual_old_oid; | |
702 | ||
703 | fd = hold_lock_file_for_update_timeout( | |
704 | &lock, filename, LOCK_DIE_ON_ERROR, | |
705 | get_files_ref_lock_timeout_ms()); | |
706 | if (fd < 0) | |
707 | die_errno(_("Could not open '%s' for writing"), filename); | |
708 | if (read_ref(pseudoref, &actual_old_oid)) | |
709 | die("could not read ref '%s'", pseudoref); | |
710 | if (oidcmp(&actual_old_oid, old_oid)) { | |
711 | warning("Unexpected sha1 when deleting %s", pseudoref); | |
712 | rollback_lock_file(&lock); | |
713 | return -1; | |
714 | } | |
715 | ||
716 | unlink(filename); | |
717 | rollback_lock_file(&lock); | |
718 | } else { | |
719 | unlink(filename); | |
720 | } | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | int refs_delete_ref(struct ref_store *refs, const char *msg, | |
726 | const char *refname, | |
727 | const struct object_id *old_oid, | |
728 | unsigned int flags) | |
729 | { | |
730 | struct ref_transaction *transaction; | |
731 | struct strbuf err = STRBUF_INIT; | |
732 | ||
733 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { | |
734 | assert(refs == get_main_ref_store(the_repository)); | |
735 | return delete_pseudoref(refname, old_oid); | |
736 | } | |
737 | ||
738 | transaction = ref_store_transaction_begin(refs, &err); | |
739 | if (!transaction || | |
740 | ref_transaction_delete(transaction, refname, old_oid, | |
741 | flags, msg, &err) || | |
742 | ref_transaction_commit(transaction, &err)) { | |
743 | error("%s", err.buf); | |
744 | ref_transaction_free(transaction); | |
745 | strbuf_release(&err); | |
746 | return 1; | |
747 | } | |
748 | ref_transaction_free(transaction); | |
749 | strbuf_release(&err); | |
750 | return 0; | |
751 | } | |
752 | ||
753 | int delete_ref(const char *msg, const char *refname, | |
754 | const struct object_id *old_oid, unsigned int flags) | |
755 | { | |
756 | return refs_delete_ref(get_main_ref_store(the_repository), msg, refname, | |
757 | old_oid, flags); | |
758 | } | |
759 | ||
760 | int copy_reflog_msg(char *buf, const char *msg) | |
761 | { | |
762 | char *cp = buf; | |
763 | char c; | |
764 | int wasspace = 1; | |
765 | ||
766 | *cp++ = '\t'; | |
767 | while ((c = *msg++)) { | |
768 | if (wasspace && isspace(c)) | |
769 | continue; | |
770 | wasspace = isspace(c); | |
771 | if (wasspace) | |
772 | c = ' '; | |
773 | *cp++ = c; | |
774 | } | |
775 | while (buf < cp && isspace(cp[-1])) | |
776 | cp--; | |
777 | *cp++ = '\n'; | |
778 | return cp - buf; | |
779 | } | |
780 | ||
781 | int should_autocreate_reflog(const char *refname) | |
782 | { | |
783 | switch (log_all_ref_updates) { | |
784 | case LOG_REFS_ALWAYS: | |
785 | return 1; | |
786 | case LOG_REFS_NORMAL: | |
787 | return starts_with(refname, "refs/heads/") || | |
788 | starts_with(refname, "refs/remotes/") || | |
789 | starts_with(refname, "refs/notes/") || | |
790 | !strcmp(refname, "HEAD"); | |
791 | default: | |
792 | return 0; | |
793 | } | |
794 | } | |
795 | ||
796 | int is_branch(const char *refname) | |
797 | { | |
798 | return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/"); | |
799 | } | |
800 | ||
801 | struct read_ref_at_cb { | |
802 | const char *refname; | |
803 | timestamp_t at_time; | |
804 | int cnt; | |
805 | int reccnt; | |
806 | struct object_id *oid; | |
807 | int found_it; | |
808 | ||
809 | struct object_id ooid; | |
810 | struct object_id noid; | |
811 | int tz; | |
812 | timestamp_t date; | |
813 | char **msg; | |
814 | timestamp_t *cutoff_time; | |
815 | int *cutoff_tz; | |
816 | int *cutoff_cnt; | |
817 | }; | |
818 | ||
819 | static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid, | |
820 | const char *email, timestamp_t timestamp, int tz, | |
821 | const char *message, void *cb_data) | |
822 | { | |
823 | struct read_ref_at_cb *cb = cb_data; | |
824 | ||
825 | cb->reccnt++; | |
826 | cb->tz = tz; | |
827 | cb->date = timestamp; | |
828 | ||
829 | if (timestamp <= cb->at_time || cb->cnt == 0) { | |
830 | if (cb->msg) | |
831 | *cb->msg = xstrdup(message); | |
832 | if (cb->cutoff_time) | |
833 | *cb->cutoff_time = timestamp; | |
834 | if (cb->cutoff_tz) | |
835 | *cb->cutoff_tz = tz; | |
836 | if (cb->cutoff_cnt) | |
837 | *cb->cutoff_cnt = cb->reccnt - 1; | |
838 | /* | |
839 | * we have not yet updated cb->[n|o]oid so they still | |
840 | * hold the values for the previous record. | |
841 | */ | |
842 | if (!is_null_oid(&cb->ooid)) { | |
843 | oidcpy(cb->oid, noid); | |
844 | if (oidcmp(&cb->ooid, noid)) | |
845 | warning("Log for ref %s has gap after %s.", | |
846 | cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822))); | |
847 | } | |
848 | else if (cb->date == cb->at_time) | |
849 | oidcpy(cb->oid, noid); | |
850 | else if (oidcmp(noid, cb->oid)) | |
851 | warning("Log for ref %s unexpectedly ended on %s.", | |
852 | cb->refname, show_date(cb->date, cb->tz, | |
853 | DATE_MODE(RFC2822))); | |
854 | oidcpy(&cb->ooid, ooid); | |
855 | oidcpy(&cb->noid, noid); | |
856 | cb->found_it = 1; | |
857 | return 1; | |
858 | } | |
859 | oidcpy(&cb->ooid, ooid); | |
860 | oidcpy(&cb->noid, noid); | |
861 | if (cb->cnt > 0) | |
862 | cb->cnt--; | |
863 | return 0; | |
864 | } | |
865 | ||
866 | static int read_ref_at_ent_oldest(struct object_id *ooid, struct object_id *noid, | |
867 | const char *email, timestamp_t timestamp, | |
868 | int tz, const char *message, void *cb_data) | |
869 | { | |
870 | struct read_ref_at_cb *cb = cb_data; | |
871 | ||
872 | if (cb->msg) | |
873 | *cb->msg = xstrdup(message); | |
874 | if (cb->cutoff_time) | |
875 | *cb->cutoff_time = timestamp; | |
876 | if (cb->cutoff_tz) | |
877 | *cb->cutoff_tz = tz; | |
878 | if (cb->cutoff_cnt) | |
879 | *cb->cutoff_cnt = cb->reccnt; | |
880 | oidcpy(cb->oid, ooid); | |
881 | if (is_null_oid(cb->oid)) | |
882 | oidcpy(cb->oid, noid); | |
883 | /* We just want the first entry */ | |
884 | return 1; | |
885 | } | |
886 | ||
887 | int read_ref_at(const char *refname, unsigned int flags, timestamp_t at_time, int cnt, | |
888 | struct object_id *oid, char **msg, | |
889 | timestamp_t *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
890 | { | |
891 | struct read_ref_at_cb cb; | |
892 | ||
893 | memset(&cb, 0, sizeof(cb)); | |
894 | cb.refname = refname; | |
895 | cb.at_time = at_time; | |
896 | cb.cnt = cnt; | |
897 | cb.msg = msg; | |
898 | cb.cutoff_time = cutoff_time; | |
899 | cb.cutoff_tz = cutoff_tz; | |
900 | cb.cutoff_cnt = cutoff_cnt; | |
901 | cb.oid = oid; | |
902 | ||
903 | for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb); | |
904 | ||
905 | if (!cb.reccnt) { | |
906 | if (flags & GET_OID_QUIETLY) | |
907 | exit(128); | |
908 | else | |
909 | die("Log for %s is empty.", refname); | |
910 | } | |
911 | if (cb.found_it) | |
912 | return 0; | |
913 | ||
914 | for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb); | |
915 | ||
916 | return 1; | |
917 | } | |
918 | ||
919 | struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs, | |
920 | struct strbuf *err) | |
921 | { | |
922 | struct ref_transaction *tr; | |
923 | assert(err); | |
924 | ||
925 | tr = xcalloc(1, sizeof(struct ref_transaction)); | |
926 | tr->ref_store = refs; | |
927 | return tr; | |
928 | } | |
929 | ||
930 | struct ref_transaction *ref_transaction_begin(struct strbuf *err) | |
931 | { | |
932 | return ref_store_transaction_begin(get_main_ref_store(the_repository), err); | |
933 | } | |
934 | ||
935 | void ref_transaction_free(struct ref_transaction *transaction) | |
936 | { | |
937 | size_t i; | |
938 | ||
939 | if (!transaction) | |
940 | return; | |
941 | ||
942 | switch (transaction->state) { | |
943 | case REF_TRANSACTION_OPEN: | |
944 | case REF_TRANSACTION_CLOSED: | |
945 | /* OK */ | |
946 | break; | |
947 | case REF_TRANSACTION_PREPARED: | |
948 | die("BUG: free called on a prepared reference transaction"); | |
949 | break; | |
950 | default: | |
951 | die("BUG: unexpected reference transaction state"); | |
952 | break; | |
953 | } | |
954 | ||
955 | for (i = 0; i < transaction->nr; i++) { | |
956 | free(transaction->updates[i]->msg); | |
957 | free(transaction->updates[i]); | |
958 | } | |
959 | free(transaction->updates); | |
960 | free(transaction); | |
961 | } | |
962 | ||
963 | struct ref_update *ref_transaction_add_update( | |
964 | struct ref_transaction *transaction, | |
965 | const char *refname, unsigned int flags, | |
966 | const struct object_id *new_oid, | |
967 | const struct object_id *old_oid, | |
968 | const char *msg) | |
969 | { | |
970 | struct ref_update *update; | |
971 | ||
972 | if (transaction->state != REF_TRANSACTION_OPEN) | |
973 | die("BUG: update called for transaction that is not open"); | |
974 | ||
975 | FLEX_ALLOC_STR(update, refname, refname); | |
976 | ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc); | |
977 | transaction->updates[transaction->nr++] = update; | |
978 | ||
979 | update->flags = flags; | |
980 | ||
981 | if (flags & REF_HAVE_NEW) | |
982 | oidcpy(&update->new_oid, new_oid); | |
983 | if (flags & REF_HAVE_OLD) | |
984 | oidcpy(&update->old_oid, old_oid); | |
985 | update->msg = xstrdup_or_null(msg); | |
986 | return update; | |
987 | } | |
988 | ||
989 | int ref_transaction_update(struct ref_transaction *transaction, | |
990 | const char *refname, | |
991 | const struct object_id *new_oid, | |
992 | const struct object_id *old_oid, | |
993 | unsigned int flags, const char *msg, | |
994 | struct strbuf *err) | |
995 | { | |
996 | assert(err); | |
997 | ||
998 | if ((new_oid && !is_null_oid(new_oid)) ? | |
999 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) : | |
1000 | !refname_is_safe(refname)) { | |
1001 | strbuf_addf(err, "refusing to update ref with bad name '%s'", | |
1002 | refname); | |
1003 | return -1; | |
1004 | } | |
1005 | ||
1006 | if (flags & ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS) | |
1007 | BUG("illegal flags 0x%x passed to ref_transaction_update()", flags); | |
1008 | ||
1009 | flags |= (new_oid ? REF_HAVE_NEW : 0) | (old_oid ? REF_HAVE_OLD : 0); | |
1010 | ||
1011 | ref_transaction_add_update(transaction, refname, flags, | |
1012 | new_oid, old_oid, msg); | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | int ref_transaction_create(struct ref_transaction *transaction, | |
1017 | const char *refname, | |
1018 | const struct object_id *new_oid, | |
1019 | unsigned int flags, const char *msg, | |
1020 | struct strbuf *err) | |
1021 | { | |
1022 | if (!new_oid || is_null_oid(new_oid)) | |
1023 | die("BUG: create called without valid new_oid"); | |
1024 | return ref_transaction_update(transaction, refname, new_oid, | |
1025 | &null_oid, flags, msg, err); | |
1026 | } | |
1027 | ||
1028 | int ref_transaction_delete(struct ref_transaction *transaction, | |
1029 | const char *refname, | |
1030 | const struct object_id *old_oid, | |
1031 | unsigned int flags, const char *msg, | |
1032 | struct strbuf *err) | |
1033 | { | |
1034 | if (old_oid && is_null_oid(old_oid)) | |
1035 | die("BUG: delete called with old_oid set to zeros"); | |
1036 | return ref_transaction_update(transaction, refname, | |
1037 | &null_oid, old_oid, | |
1038 | flags, msg, err); | |
1039 | } | |
1040 | ||
1041 | int ref_transaction_verify(struct ref_transaction *transaction, | |
1042 | const char *refname, | |
1043 | const struct object_id *old_oid, | |
1044 | unsigned int flags, | |
1045 | struct strbuf *err) | |
1046 | { | |
1047 | if (!old_oid) | |
1048 | die("BUG: verify called with old_oid set to NULL"); | |
1049 | return ref_transaction_update(transaction, refname, | |
1050 | NULL, old_oid, | |
1051 | flags, NULL, err); | |
1052 | } | |
1053 | ||
1054 | int refs_update_ref(struct ref_store *refs, const char *msg, | |
1055 | const char *refname, const struct object_id *new_oid, | |
1056 | const struct object_id *old_oid, unsigned int flags, | |
1057 | enum action_on_err onerr) | |
1058 | { | |
1059 | struct ref_transaction *t = NULL; | |
1060 | struct strbuf err = STRBUF_INIT; | |
1061 | int ret = 0; | |
1062 | ||
1063 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { | |
1064 | assert(refs == get_main_ref_store(the_repository)); | |
1065 | ret = write_pseudoref(refname, new_oid, old_oid, &err); | |
1066 | } else { | |
1067 | t = ref_store_transaction_begin(refs, &err); | |
1068 | if (!t || | |
1069 | ref_transaction_update(t, refname, new_oid, old_oid, | |
1070 | flags, msg, &err) || | |
1071 | ref_transaction_commit(t, &err)) { | |
1072 | ret = 1; | |
1073 | ref_transaction_free(t); | |
1074 | } | |
1075 | } | |
1076 | if (ret) { | |
1077 | const char *str = "update_ref failed for ref '%s': %s"; | |
1078 | ||
1079 | switch (onerr) { | |
1080 | case UPDATE_REFS_MSG_ON_ERR: | |
1081 | error(str, refname, err.buf); | |
1082 | break; | |
1083 | case UPDATE_REFS_DIE_ON_ERR: | |
1084 | die(str, refname, err.buf); | |
1085 | break; | |
1086 | case UPDATE_REFS_QUIET_ON_ERR: | |
1087 | break; | |
1088 | } | |
1089 | strbuf_release(&err); | |
1090 | return 1; | |
1091 | } | |
1092 | strbuf_release(&err); | |
1093 | if (t) | |
1094 | ref_transaction_free(t); | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | int update_ref(const char *msg, const char *refname, | |
1099 | const struct object_id *new_oid, | |
1100 | const struct object_id *old_oid, | |
1101 | unsigned int flags, enum action_on_err onerr) | |
1102 | { | |
1103 | return refs_update_ref(get_main_ref_store(the_repository), msg, refname, new_oid, | |
1104 | old_oid, flags, onerr); | |
1105 | } | |
1106 | ||
1107 | char *shorten_unambiguous_ref(const char *refname, int strict) | |
1108 | { | |
1109 | int i; | |
1110 | static char **scanf_fmts; | |
1111 | static int nr_rules; | |
1112 | char *short_name; | |
1113 | struct strbuf resolved_buf = STRBUF_INIT; | |
1114 | ||
1115 | if (!nr_rules) { | |
1116 | /* | |
1117 | * Pre-generate scanf formats from ref_rev_parse_rules[]. | |
1118 | * Generate a format suitable for scanf from a | |
1119 | * ref_rev_parse_rules rule by interpolating "%s" at the | |
1120 | * location of the "%.*s". | |
1121 | */ | |
1122 | size_t total_len = 0; | |
1123 | size_t offset = 0; | |
1124 | ||
1125 | /* the rule list is NULL terminated, count them first */ | |
1126 | for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++) | |
1127 | /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */ | |
1128 | total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1; | |
1129 | ||
1130 | scanf_fmts = xmalloc(st_add(st_mult(sizeof(char *), nr_rules), total_len)); | |
1131 | ||
1132 | offset = 0; | |
1133 | for (i = 0; i < nr_rules; i++) { | |
1134 | assert(offset < total_len); | |
1135 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset; | |
1136 | offset += snprintf(scanf_fmts[i], total_len - offset, | |
1137 | ref_rev_parse_rules[i], 2, "%s") + 1; | |
1138 | } | |
1139 | } | |
1140 | ||
1141 | /* bail out if there are no rules */ | |
1142 | if (!nr_rules) | |
1143 | return xstrdup(refname); | |
1144 | ||
1145 | /* buffer for scanf result, at most refname must fit */ | |
1146 | short_name = xstrdup(refname); | |
1147 | ||
1148 | /* skip first rule, it will always match */ | |
1149 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1150 | int j; | |
1151 | int rules_to_fail = i; | |
1152 | int short_name_len; | |
1153 | ||
1154 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) | |
1155 | continue; | |
1156 | ||
1157 | short_name_len = strlen(short_name); | |
1158 | ||
1159 | /* | |
1160 | * in strict mode, all (except the matched one) rules | |
1161 | * must fail to resolve to a valid non-ambiguous ref | |
1162 | */ | |
1163 | if (strict) | |
1164 | rules_to_fail = nr_rules; | |
1165 | ||
1166 | /* | |
1167 | * check if the short name resolves to a valid ref, | |
1168 | * but use only rules prior to the matched one | |
1169 | */ | |
1170 | for (j = 0; j < rules_to_fail; j++) { | |
1171 | const char *rule = ref_rev_parse_rules[j]; | |
1172 | ||
1173 | /* skip matched rule */ | |
1174 | if (i == j) | |
1175 | continue; | |
1176 | ||
1177 | /* | |
1178 | * the short name is ambiguous, if it resolves | |
1179 | * (with this previous rule) to a valid ref | |
1180 | * read_ref() returns 0 on success | |
1181 | */ | |
1182 | strbuf_reset(&resolved_buf); | |
1183 | strbuf_addf(&resolved_buf, rule, | |
1184 | short_name_len, short_name); | |
1185 | if (ref_exists(resolved_buf.buf)) | |
1186 | break; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * short name is non-ambiguous if all previous rules | |
1191 | * haven't resolved to a valid ref | |
1192 | */ | |
1193 | if (j == rules_to_fail) { | |
1194 | strbuf_release(&resolved_buf); | |
1195 | return short_name; | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | strbuf_release(&resolved_buf); | |
1200 | free(short_name); | |
1201 | return xstrdup(refname); | |
1202 | } | |
1203 | ||
1204 | static struct string_list *hide_refs; | |
1205 | ||
1206 | int parse_hide_refs_config(const char *var, const char *value, const char *section) | |
1207 | { | |
1208 | const char *key; | |
1209 | if (!strcmp("transfer.hiderefs", var) || | |
1210 | (!parse_config_key(var, section, NULL, NULL, &key) && | |
1211 | !strcmp(key, "hiderefs"))) { | |
1212 | char *ref; | |
1213 | int len; | |
1214 | ||
1215 | if (!value) | |
1216 | return config_error_nonbool(var); | |
1217 | ref = xstrdup(value); | |
1218 | len = strlen(ref); | |
1219 | while (len && ref[len - 1] == '/') | |
1220 | ref[--len] = '\0'; | |
1221 | if (!hide_refs) { | |
1222 | hide_refs = xcalloc(1, sizeof(*hide_refs)); | |
1223 | hide_refs->strdup_strings = 1; | |
1224 | } | |
1225 | string_list_append(hide_refs, ref); | |
1226 | } | |
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | int ref_is_hidden(const char *refname, const char *refname_full) | |
1231 | { | |
1232 | int i; | |
1233 | ||
1234 | if (!hide_refs) | |
1235 | return 0; | |
1236 | for (i = hide_refs->nr - 1; i >= 0; i--) { | |
1237 | const char *match = hide_refs->items[i].string; | |
1238 | const char *subject; | |
1239 | int neg = 0; | |
1240 | const char *p; | |
1241 | ||
1242 | if (*match == '!') { | |
1243 | neg = 1; | |
1244 | match++; | |
1245 | } | |
1246 | ||
1247 | if (*match == '^') { | |
1248 | subject = refname_full; | |
1249 | match++; | |
1250 | } else { | |
1251 | subject = refname; | |
1252 | } | |
1253 | ||
1254 | /* refname can be NULL when namespaces are used. */ | |
1255 | if (subject && | |
1256 | skip_prefix(subject, match, &p) && | |
1257 | (!*p || *p == '/')) | |
1258 | return !neg; | |
1259 | } | |
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | const char *find_descendant_ref(const char *dirname, | |
1264 | const struct string_list *extras, | |
1265 | const struct string_list *skip) | |
1266 | { | |
1267 | int pos; | |
1268 | ||
1269 | if (!extras) | |
1270 | return NULL; | |
1271 | ||
1272 | /* | |
1273 | * Look at the place where dirname would be inserted into | |
1274 | * extras. If there is an entry at that position that starts | |
1275 | * with dirname (remember, dirname includes the trailing | |
1276 | * slash) and is not in skip, then we have a conflict. | |
1277 | */ | |
1278 | for (pos = string_list_find_insert_index(extras, dirname, 0); | |
1279 | pos < extras->nr; pos++) { | |
1280 | const char *extra_refname = extras->items[pos].string; | |
1281 | ||
1282 | if (!starts_with(extra_refname, dirname)) | |
1283 | break; | |
1284 | ||
1285 | if (!skip || !string_list_has_string(skip, extra_refname)) | |
1286 | return extra_refname; | |
1287 | } | |
1288 | return NULL; | |
1289 | } | |
1290 | ||
1291 | int refs_rename_ref_available(struct ref_store *refs, | |
1292 | const char *old_refname, | |
1293 | const char *new_refname) | |
1294 | { | |
1295 | struct string_list skip = STRING_LIST_INIT_NODUP; | |
1296 | struct strbuf err = STRBUF_INIT; | |
1297 | int ok; | |
1298 | ||
1299 | string_list_insert(&skip, old_refname); | |
1300 | ok = !refs_verify_refname_available(refs, new_refname, | |
1301 | NULL, &skip, &err); | |
1302 | if (!ok) | |
1303 | error("%s", err.buf); | |
1304 | ||
1305 | string_list_clear(&skip, 0); | |
1306 | strbuf_release(&err); | |
1307 | return ok; | |
1308 | } | |
1309 | ||
1310 | int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
1311 | { | |
1312 | struct object_id oid; | |
1313 | int flag; | |
1314 | ||
1315 | if (!refs_read_ref_full(refs, "HEAD", RESOLVE_REF_READING, | |
1316 | &oid, &flag)) | |
1317 | return fn("HEAD", &oid, flag, cb_data); | |
1318 | ||
1319 | return 0; | |
1320 | } | |
1321 | ||
1322 | int head_ref(each_ref_fn fn, void *cb_data) | |
1323 | { | |
1324 | return refs_head_ref(get_main_ref_store(the_repository), fn, cb_data); | |
1325 | } | |
1326 | ||
1327 | struct ref_iterator *refs_ref_iterator_begin( | |
1328 | struct ref_store *refs, | |
1329 | const char *prefix, int trim, int flags) | |
1330 | { | |
1331 | struct ref_iterator *iter; | |
1332 | ||
1333 | if (ref_paranoia < 0) | |
1334 | ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 0); | |
1335 | if (ref_paranoia) | |
1336 | flags |= DO_FOR_EACH_INCLUDE_BROKEN; | |
1337 | ||
1338 | iter = refs->be->iterator_begin(refs, prefix, flags); | |
1339 | ||
1340 | /* | |
1341 | * `iterator_begin()` already takes care of prefix, but we | |
1342 | * might need to do some trimming: | |
1343 | */ | |
1344 | if (trim) | |
1345 | iter = prefix_ref_iterator_begin(iter, "", trim); | |
1346 | ||
1347 | /* Sanity check for subclasses: */ | |
1348 | if (!iter->ordered) | |
1349 | BUG("reference iterator is not ordered"); | |
1350 | ||
1351 | return iter; | |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * Call fn for each reference in the specified submodule for which the | |
1356 | * refname begins with prefix. If trim is non-zero, then trim that | |
1357 | * many characters off the beginning of each refname before passing | |
1358 | * the refname to fn. flags can be DO_FOR_EACH_INCLUDE_BROKEN to | |
1359 | * include broken references in the iteration. If fn ever returns a | |
1360 | * non-zero value, stop the iteration and return that value; | |
1361 | * otherwise, return 0. | |
1362 | */ | |
1363 | static int do_for_each_ref(struct ref_store *refs, const char *prefix, | |
1364 | each_ref_fn fn, int trim, int flags, void *cb_data) | |
1365 | { | |
1366 | struct ref_iterator *iter; | |
1367 | ||
1368 | if (!refs) | |
1369 | return 0; | |
1370 | ||
1371 | iter = refs_ref_iterator_begin(refs, prefix, trim, flags); | |
1372 | ||
1373 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1374 | } | |
1375 | ||
1376 | int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
1377 | { | |
1378 | return do_for_each_ref(refs, "", fn, 0, 0, cb_data); | |
1379 | } | |
1380 | ||
1381 | int for_each_ref(each_ref_fn fn, void *cb_data) | |
1382 | { | |
1383 | return refs_for_each_ref(get_main_ref_store(the_repository), fn, cb_data); | |
1384 | } | |
1385 | ||
1386 | int refs_for_each_ref_in(struct ref_store *refs, const char *prefix, | |
1387 | each_ref_fn fn, void *cb_data) | |
1388 | { | |
1389 | return do_for_each_ref(refs, prefix, fn, strlen(prefix), 0, cb_data); | |
1390 | } | |
1391 | ||
1392 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) | |
1393 | { | |
1394 | return refs_for_each_ref_in(get_main_ref_store(the_repository), prefix, fn, cb_data); | |
1395 | } | |
1396 | ||
1397 | int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken) | |
1398 | { | |
1399 | unsigned int flag = 0; | |
1400 | ||
1401 | if (broken) | |
1402 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
1403 | return do_for_each_ref(get_main_ref_store(the_repository), | |
1404 | prefix, fn, 0, flag, cb_data); | |
1405 | } | |
1406 | ||
1407 | int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix, | |
1408 | each_ref_fn fn, void *cb_data, | |
1409 | unsigned int broken) | |
1410 | { | |
1411 | unsigned int flag = 0; | |
1412 | ||
1413 | if (broken) | |
1414 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
1415 | return do_for_each_ref(refs, prefix, fn, 0, flag, cb_data); | |
1416 | } | |
1417 | ||
1418 | int for_each_replace_ref(struct repository *r, each_ref_fn fn, void *cb_data) | |
1419 | { | |
1420 | return do_for_each_ref(get_main_ref_store(r), | |
1421 | git_replace_ref_base, fn, | |
1422 | strlen(git_replace_ref_base), | |
1423 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
1424 | } | |
1425 | ||
1426 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
1427 | { | |
1428 | struct strbuf buf = STRBUF_INIT; | |
1429 | int ret; | |
1430 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
1431 | ret = do_for_each_ref(get_main_ref_store(the_repository), | |
1432 | buf.buf, fn, 0, 0, cb_data); | |
1433 | strbuf_release(&buf); | |
1434 | return ret; | |
1435 | } | |
1436 | ||
1437 | int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
1438 | { | |
1439 | return do_for_each_ref(refs, "", fn, 0, | |
1440 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
1441 | } | |
1442 | ||
1443 | int for_each_rawref(each_ref_fn fn, void *cb_data) | |
1444 | { | |
1445 | return refs_for_each_rawref(get_main_ref_store(the_repository), fn, cb_data); | |
1446 | } | |
1447 | ||
1448 | int refs_read_raw_ref(struct ref_store *ref_store, | |
1449 | const char *refname, struct object_id *oid, | |
1450 | struct strbuf *referent, unsigned int *type) | |
1451 | { | |
1452 | return ref_store->be->read_raw_ref(ref_store, refname, oid, referent, type); | |
1453 | } | |
1454 | ||
1455 | /* This function needs to return a meaningful errno on failure */ | |
1456 | const char *refs_resolve_ref_unsafe(struct ref_store *refs, | |
1457 | const char *refname, | |
1458 | int resolve_flags, | |
1459 | struct object_id *oid, int *flags) | |
1460 | { | |
1461 | static struct strbuf sb_refname = STRBUF_INIT; | |
1462 | struct object_id unused_oid; | |
1463 | int unused_flags; | |
1464 | int symref_count; | |
1465 | ||
1466 | if (!oid) | |
1467 | oid = &unused_oid; | |
1468 | if (!flags) | |
1469 | flags = &unused_flags; | |
1470 | ||
1471 | *flags = 0; | |
1472 | ||
1473 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1474 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1475 | !refname_is_safe(refname)) { | |
1476 | errno = EINVAL; | |
1477 | return NULL; | |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * dwim_ref() uses REF_ISBROKEN to distinguish between | |
1482 | * missing refs and refs that were present but invalid, | |
1483 | * to complain about the latter to stderr. | |
1484 | * | |
1485 | * We don't know whether the ref exists, so don't set | |
1486 | * REF_ISBROKEN yet. | |
1487 | */ | |
1488 | *flags |= REF_BAD_NAME; | |
1489 | } | |
1490 | ||
1491 | for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) { | |
1492 | unsigned int read_flags = 0; | |
1493 | ||
1494 | if (refs_read_raw_ref(refs, refname, | |
1495 | oid, &sb_refname, &read_flags)) { | |
1496 | *flags |= read_flags; | |
1497 | ||
1498 | /* In reading mode, refs must eventually resolve */ | |
1499 | if (resolve_flags & RESOLVE_REF_READING) | |
1500 | return NULL; | |
1501 | ||
1502 | /* | |
1503 | * Otherwise a missing ref is OK. But the files backend | |
1504 | * may show errors besides ENOENT if there are | |
1505 | * similarly-named refs. | |
1506 | */ | |
1507 | if (errno != ENOENT && | |
1508 | errno != EISDIR && | |
1509 | errno != ENOTDIR) | |
1510 | return NULL; | |
1511 | ||
1512 | oidclr(oid); | |
1513 | if (*flags & REF_BAD_NAME) | |
1514 | *flags |= REF_ISBROKEN; | |
1515 | return refname; | |
1516 | } | |
1517 | ||
1518 | *flags |= read_flags; | |
1519 | ||
1520 | if (!(read_flags & REF_ISSYMREF)) { | |
1521 | if (*flags & REF_BAD_NAME) { | |
1522 | oidclr(oid); | |
1523 | *flags |= REF_ISBROKEN; | |
1524 | } | |
1525 | return refname; | |
1526 | } | |
1527 | ||
1528 | refname = sb_refname.buf; | |
1529 | if (resolve_flags & RESOLVE_REF_NO_RECURSE) { | |
1530 | oidclr(oid); | |
1531 | return refname; | |
1532 | } | |
1533 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1534 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1535 | !refname_is_safe(refname)) { | |
1536 | errno = EINVAL; | |
1537 | return NULL; | |
1538 | } | |
1539 | ||
1540 | *flags |= REF_ISBROKEN | REF_BAD_NAME; | |
1541 | } | |
1542 | } | |
1543 | ||
1544 | errno = ELOOP; | |
1545 | return NULL; | |
1546 | } | |
1547 | ||
1548 | /* backend functions */ | |
1549 | int refs_init_db(struct strbuf *err) | |
1550 | { | |
1551 | struct ref_store *refs = get_main_ref_store(the_repository); | |
1552 | ||
1553 | return refs->be->init_db(refs, err); | |
1554 | } | |
1555 | ||
1556 | const char *resolve_ref_unsafe(const char *refname, int resolve_flags, | |
1557 | struct object_id *oid, int *flags) | |
1558 | { | |
1559 | return refs_resolve_ref_unsafe(get_main_ref_store(the_repository), refname, | |
1560 | resolve_flags, oid, flags); | |
1561 | } | |
1562 | ||
1563 | int resolve_gitlink_ref(const char *submodule, const char *refname, | |
1564 | struct object_id *oid) | |
1565 | { | |
1566 | struct ref_store *refs; | |
1567 | int flags; | |
1568 | ||
1569 | refs = get_submodule_ref_store(submodule); | |
1570 | ||
1571 | if (!refs) | |
1572 | return -1; | |
1573 | ||
1574 | if (!refs_resolve_ref_unsafe(refs, refname, 0, oid, &flags) || | |
1575 | is_null_oid(oid)) | |
1576 | return -1; | |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | struct ref_store_hash_entry | |
1581 | { | |
1582 | struct hashmap_entry ent; /* must be the first member! */ | |
1583 | ||
1584 | struct ref_store *refs; | |
1585 | ||
1586 | /* NUL-terminated identifier of the ref store: */ | |
1587 | char name[FLEX_ARRAY]; | |
1588 | }; | |
1589 | ||
1590 | static int ref_store_hash_cmp(const void *unused_cmp_data, | |
1591 | const void *entry, const void *entry_or_key, | |
1592 | const void *keydata) | |
1593 | { | |
1594 | const struct ref_store_hash_entry *e1 = entry, *e2 = entry_or_key; | |
1595 | const char *name = keydata ? keydata : e2->name; | |
1596 | ||
1597 | return strcmp(e1->name, name); | |
1598 | } | |
1599 | ||
1600 | static struct ref_store_hash_entry *alloc_ref_store_hash_entry( | |
1601 | const char *name, struct ref_store *refs) | |
1602 | { | |
1603 | struct ref_store_hash_entry *entry; | |
1604 | ||
1605 | FLEX_ALLOC_STR(entry, name, name); | |
1606 | hashmap_entry_init(entry, strhash(name)); | |
1607 | entry->refs = refs; | |
1608 | return entry; | |
1609 | } | |
1610 | ||
1611 | /* A hashmap of ref_stores, stored by submodule name: */ | |
1612 | static struct hashmap submodule_ref_stores; | |
1613 | ||
1614 | /* A hashmap of ref_stores, stored by worktree id: */ | |
1615 | static struct hashmap worktree_ref_stores; | |
1616 | ||
1617 | /* | |
1618 | * Look up a ref store by name. If that ref_store hasn't been | |
1619 | * registered yet, return NULL. | |
1620 | */ | |
1621 | static struct ref_store *lookup_ref_store_map(struct hashmap *map, | |
1622 | const char *name) | |
1623 | { | |
1624 | struct ref_store_hash_entry *entry; | |
1625 | ||
1626 | if (!map->tablesize) | |
1627 | /* It's initialized on demand in register_ref_store(). */ | |
1628 | return NULL; | |
1629 | ||
1630 | entry = hashmap_get_from_hash(map, strhash(name), name); | |
1631 | return entry ? entry->refs : NULL; | |
1632 | } | |
1633 | ||
1634 | /* | |
1635 | * Create, record, and return a ref_store instance for the specified | |
1636 | * gitdir. | |
1637 | */ | |
1638 | static struct ref_store *ref_store_init(const char *gitdir, | |
1639 | unsigned int flags) | |
1640 | { | |
1641 | const char *be_name = "files"; | |
1642 | struct ref_storage_be *be = find_ref_storage_backend(be_name); | |
1643 | struct ref_store *refs; | |
1644 | ||
1645 | if (!be) | |
1646 | die("BUG: reference backend %s is unknown", be_name); | |
1647 | ||
1648 | refs = be->init(gitdir, flags); | |
1649 | return refs; | |
1650 | } | |
1651 | ||
1652 | struct ref_store *get_main_ref_store(struct repository *r) | |
1653 | { | |
1654 | if (r->refs) | |
1655 | return r->refs; | |
1656 | ||
1657 | r->refs = ref_store_init(r->gitdir, REF_STORE_ALL_CAPS); | |
1658 | return r->refs; | |
1659 | } | |
1660 | ||
1661 | /* | |
1662 | * Associate a ref store with a name. It is a fatal error to call this | |
1663 | * function twice for the same name. | |
1664 | */ | |
1665 | static void register_ref_store_map(struct hashmap *map, | |
1666 | const char *type, | |
1667 | struct ref_store *refs, | |
1668 | const char *name) | |
1669 | { | |
1670 | if (!map->tablesize) | |
1671 | hashmap_init(map, ref_store_hash_cmp, NULL, 0); | |
1672 | ||
1673 | if (hashmap_put(map, alloc_ref_store_hash_entry(name, refs))) | |
1674 | die("BUG: %s ref_store '%s' initialized twice", type, name); | |
1675 | } | |
1676 | ||
1677 | struct ref_store *get_submodule_ref_store(const char *submodule) | |
1678 | { | |
1679 | struct strbuf submodule_sb = STRBUF_INIT; | |
1680 | struct ref_store *refs; | |
1681 | char *to_free = NULL; | |
1682 | size_t len; | |
1683 | ||
1684 | if (!submodule) | |
1685 | return NULL; | |
1686 | ||
1687 | len = strlen(submodule); | |
1688 | while (len && is_dir_sep(submodule[len - 1])) | |
1689 | len--; | |
1690 | if (!len) | |
1691 | return NULL; | |
1692 | ||
1693 | if (submodule[len]) | |
1694 | /* We need to strip off one or more trailing slashes */ | |
1695 | submodule = to_free = xmemdupz(submodule, len); | |
1696 | ||
1697 | refs = lookup_ref_store_map(&submodule_ref_stores, submodule); | |
1698 | if (refs) | |
1699 | goto done; | |
1700 | ||
1701 | strbuf_addstr(&submodule_sb, submodule); | |
1702 | if (!is_nonbare_repository_dir(&submodule_sb)) | |
1703 | goto done; | |
1704 | ||
1705 | if (submodule_to_gitdir(&submodule_sb, submodule)) | |
1706 | goto done; | |
1707 | ||
1708 | /* assume that add_submodule_odb() has been called */ | |
1709 | refs = ref_store_init(submodule_sb.buf, | |
1710 | REF_STORE_READ | REF_STORE_ODB); | |
1711 | register_ref_store_map(&submodule_ref_stores, "submodule", | |
1712 | refs, submodule); | |
1713 | ||
1714 | done: | |
1715 | strbuf_release(&submodule_sb); | |
1716 | free(to_free); | |
1717 | ||
1718 | return refs; | |
1719 | } | |
1720 | ||
1721 | struct ref_store *get_worktree_ref_store(const struct worktree *wt) | |
1722 | { | |
1723 | struct ref_store *refs; | |
1724 | const char *id; | |
1725 | ||
1726 | if (wt->is_current) | |
1727 | return get_main_ref_store(the_repository); | |
1728 | ||
1729 | id = wt->id ? wt->id : "/"; | |
1730 | refs = lookup_ref_store_map(&worktree_ref_stores, id); | |
1731 | if (refs) | |
1732 | return refs; | |
1733 | ||
1734 | if (wt->id) | |
1735 | refs = ref_store_init(git_common_path("worktrees/%s", wt->id), | |
1736 | REF_STORE_ALL_CAPS); | |
1737 | else | |
1738 | refs = ref_store_init(get_git_common_dir(), | |
1739 | REF_STORE_ALL_CAPS); | |
1740 | ||
1741 | if (refs) | |
1742 | register_ref_store_map(&worktree_ref_stores, "worktree", | |
1743 | refs, id); | |
1744 | return refs; | |
1745 | } | |
1746 | ||
1747 | void base_ref_store_init(struct ref_store *refs, | |
1748 | const struct ref_storage_be *be) | |
1749 | { | |
1750 | refs->be = be; | |
1751 | } | |
1752 | ||
1753 | /* backend functions */ | |
1754 | int refs_pack_refs(struct ref_store *refs, unsigned int flags) | |
1755 | { | |
1756 | return refs->be->pack_refs(refs, flags); | |
1757 | } | |
1758 | ||
1759 | int refs_peel_ref(struct ref_store *refs, const char *refname, | |
1760 | struct object_id *oid) | |
1761 | { | |
1762 | int flag; | |
1763 | struct object_id base; | |
1764 | ||
1765 | if (current_ref_iter && current_ref_iter->refname == refname) { | |
1766 | struct object_id peeled; | |
1767 | ||
1768 | if (ref_iterator_peel(current_ref_iter, &peeled)) | |
1769 | return -1; | |
1770 | oidcpy(oid, &peeled); | |
1771 | return 0; | |
1772 | } | |
1773 | ||
1774 | if (refs_read_ref_full(refs, refname, | |
1775 | RESOLVE_REF_READING, &base, &flag)) | |
1776 | return -1; | |
1777 | ||
1778 | return peel_object(&base, oid); | |
1779 | } | |
1780 | ||
1781 | int peel_ref(const char *refname, struct object_id *oid) | |
1782 | { | |
1783 | return refs_peel_ref(get_main_ref_store(the_repository), refname, oid); | |
1784 | } | |
1785 | ||
1786 | int refs_create_symref(struct ref_store *refs, | |
1787 | const char *ref_target, | |
1788 | const char *refs_heads_master, | |
1789 | const char *logmsg) | |
1790 | { | |
1791 | return refs->be->create_symref(refs, ref_target, | |
1792 | refs_heads_master, | |
1793 | logmsg); | |
1794 | } | |
1795 | ||
1796 | int create_symref(const char *ref_target, const char *refs_heads_master, | |
1797 | const char *logmsg) | |
1798 | { | |
1799 | return refs_create_symref(get_main_ref_store(the_repository), ref_target, | |
1800 | refs_heads_master, logmsg); | |
1801 | } | |
1802 | ||
1803 | int ref_update_reject_duplicates(struct string_list *refnames, | |
1804 | struct strbuf *err) | |
1805 | { | |
1806 | size_t i, n = refnames->nr; | |
1807 | ||
1808 | assert(err); | |
1809 | ||
1810 | for (i = 1; i < n; i++) { | |
1811 | int cmp = strcmp(refnames->items[i - 1].string, | |
1812 | refnames->items[i].string); | |
1813 | ||
1814 | if (!cmp) { | |
1815 | strbuf_addf(err, | |
1816 | "multiple updates for ref '%s' not allowed.", | |
1817 | refnames->items[i].string); | |
1818 | return 1; | |
1819 | } else if (cmp > 0) { | |
1820 | die("BUG: ref_update_reject_duplicates() received unsorted list"); | |
1821 | } | |
1822 | } | |
1823 | return 0; | |
1824 | } | |
1825 | ||
1826 | int ref_transaction_prepare(struct ref_transaction *transaction, | |
1827 | struct strbuf *err) | |
1828 | { | |
1829 | struct ref_store *refs = transaction->ref_store; | |
1830 | ||
1831 | switch (transaction->state) { | |
1832 | case REF_TRANSACTION_OPEN: | |
1833 | /* Good. */ | |
1834 | break; | |
1835 | case REF_TRANSACTION_PREPARED: | |
1836 | die("BUG: prepare called twice on reference transaction"); | |
1837 | break; | |
1838 | case REF_TRANSACTION_CLOSED: | |
1839 | die("BUG: prepare called on a closed reference transaction"); | |
1840 | break; | |
1841 | default: | |
1842 | die("BUG: unexpected reference transaction state"); | |
1843 | break; | |
1844 | } | |
1845 | ||
1846 | if (getenv(GIT_QUARANTINE_ENVIRONMENT)) { | |
1847 | strbuf_addstr(err, | |
1848 | _("ref updates forbidden inside quarantine environment")); | |
1849 | return -1; | |
1850 | } | |
1851 | ||
1852 | return refs->be->transaction_prepare(refs, transaction, err); | |
1853 | } | |
1854 | ||
1855 | int ref_transaction_abort(struct ref_transaction *transaction, | |
1856 | struct strbuf *err) | |
1857 | { | |
1858 | struct ref_store *refs = transaction->ref_store; | |
1859 | int ret = 0; | |
1860 | ||
1861 | switch (transaction->state) { | |
1862 | case REF_TRANSACTION_OPEN: | |
1863 | /* No need to abort explicitly. */ | |
1864 | break; | |
1865 | case REF_TRANSACTION_PREPARED: | |
1866 | ret = refs->be->transaction_abort(refs, transaction, err); | |
1867 | break; | |
1868 | case REF_TRANSACTION_CLOSED: | |
1869 | die("BUG: abort called on a closed reference transaction"); | |
1870 | break; | |
1871 | default: | |
1872 | die("BUG: unexpected reference transaction state"); | |
1873 | break; | |
1874 | } | |
1875 | ||
1876 | ref_transaction_free(transaction); | |
1877 | return ret; | |
1878 | } | |
1879 | ||
1880 | int ref_transaction_commit(struct ref_transaction *transaction, | |
1881 | struct strbuf *err) | |
1882 | { | |
1883 | struct ref_store *refs = transaction->ref_store; | |
1884 | int ret; | |
1885 | ||
1886 | switch (transaction->state) { | |
1887 | case REF_TRANSACTION_OPEN: | |
1888 | /* Need to prepare first. */ | |
1889 | ret = ref_transaction_prepare(transaction, err); | |
1890 | if (ret) | |
1891 | return ret; | |
1892 | break; | |
1893 | case REF_TRANSACTION_PREPARED: | |
1894 | /* Fall through to finish. */ | |
1895 | break; | |
1896 | case REF_TRANSACTION_CLOSED: | |
1897 | die("BUG: commit called on a closed reference transaction"); | |
1898 | break; | |
1899 | default: | |
1900 | die("BUG: unexpected reference transaction state"); | |
1901 | break; | |
1902 | } | |
1903 | ||
1904 | return refs->be->transaction_finish(refs, transaction, err); | |
1905 | } | |
1906 | ||
1907 | int refs_verify_refname_available(struct ref_store *refs, | |
1908 | const char *refname, | |
1909 | const struct string_list *extras, | |
1910 | const struct string_list *skip, | |
1911 | struct strbuf *err) | |
1912 | { | |
1913 | const char *slash; | |
1914 | const char *extra_refname; | |
1915 | struct strbuf dirname = STRBUF_INIT; | |
1916 | struct strbuf referent = STRBUF_INIT; | |
1917 | struct object_id oid; | |
1918 | unsigned int type; | |
1919 | struct ref_iterator *iter; | |
1920 | int ok; | |
1921 | int ret = -1; | |
1922 | ||
1923 | /* | |
1924 | * For the sake of comments in this function, suppose that | |
1925 | * refname is "refs/foo/bar". | |
1926 | */ | |
1927 | ||
1928 | assert(err); | |
1929 | ||
1930 | strbuf_grow(&dirname, strlen(refname) + 1); | |
1931 | for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) { | |
1932 | /* Expand dirname to the new prefix, not including the trailing slash: */ | |
1933 | strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len); | |
1934 | ||
1935 | /* | |
1936 | * We are still at a leading dir of the refname (e.g., | |
1937 | * "refs/foo"; if there is a reference with that name, | |
1938 | * it is a conflict, *unless* it is in skip. | |
1939 | */ | |
1940 | if (skip && string_list_has_string(skip, dirname.buf)) | |
1941 | continue; | |
1942 | ||
1943 | if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, &type)) { | |
1944 | strbuf_addf(err, "'%s' exists; cannot create '%s'", | |
1945 | dirname.buf, refname); | |
1946 | goto cleanup; | |
1947 | } | |
1948 | ||
1949 | if (extras && string_list_has_string(extras, dirname.buf)) { | |
1950 | strbuf_addf(err, "cannot process '%s' and '%s' at the same time", | |
1951 | refname, dirname.buf); | |
1952 | goto cleanup; | |
1953 | } | |
1954 | } | |
1955 | ||
1956 | /* | |
1957 | * We are at the leaf of our refname (e.g., "refs/foo/bar"). | |
1958 | * There is no point in searching for a reference with that | |
1959 | * name, because a refname isn't considered to conflict with | |
1960 | * itself. But we still need to check for references whose | |
1961 | * names are in the "refs/foo/bar/" namespace, because they | |
1962 | * *do* conflict. | |
1963 | */ | |
1964 | strbuf_addstr(&dirname, refname + dirname.len); | |
1965 | strbuf_addch(&dirname, '/'); | |
1966 | ||
1967 | iter = refs_ref_iterator_begin(refs, dirname.buf, 0, | |
1968 | DO_FOR_EACH_INCLUDE_BROKEN); | |
1969 | while ((ok = ref_iterator_advance(iter)) == ITER_OK) { | |
1970 | if (skip && | |
1971 | string_list_has_string(skip, iter->refname)) | |
1972 | continue; | |
1973 | ||
1974 | strbuf_addf(err, "'%s' exists; cannot create '%s'", | |
1975 | iter->refname, refname); | |
1976 | ref_iterator_abort(iter); | |
1977 | goto cleanup; | |
1978 | } | |
1979 | ||
1980 | if (ok != ITER_DONE) | |
1981 | die("BUG: error while iterating over references"); | |
1982 | ||
1983 | extra_refname = find_descendant_ref(dirname.buf, extras, skip); | |
1984 | if (extra_refname) | |
1985 | strbuf_addf(err, "cannot process '%s' and '%s' at the same time", | |
1986 | refname, extra_refname); | |
1987 | else | |
1988 | ret = 0; | |
1989 | ||
1990 | cleanup: | |
1991 | strbuf_release(&referent); | |
1992 | strbuf_release(&dirname); | |
1993 | return ret; | |
1994 | } | |
1995 | ||
1996 | int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
1997 | { | |
1998 | struct ref_iterator *iter; | |
1999 | ||
2000 | iter = refs->be->reflog_iterator_begin(refs); | |
2001 | ||
2002 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
2003 | } | |
2004 | ||
2005 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
2006 | { | |
2007 | return refs_for_each_reflog(get_main_ref_store(the_repository), fn, cb_data); | |
2008 | } | |
2009 | ||
2010 | int refs_for_each_reflog_ent_reverse(struct ref_store *refs, | |
2011 | const char *refname, | |
2012 | each_reflog_ent_fn fn, | |
2013 | void *cb_data) | |
2014 | { | |
2015 | return refs->be->for_each_reflog_ent_reverse(refs, refname, | |
2016 | fn, cb_data); | |
2017 | } | |
2018 | ||
2019 | int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, | |
2020 | void *cb_data) | |
2021 | { | |
2022 | return refs_for_each_reflog_ent_reverse(get_main_ref_store(the_repository), | |
2023 | refname, fn, cb_data); | |
2024 | } | |
2025 | ||
2026 | int refs_for_each_reflog_ent(struct ref_store *refs, const char *refname, | |
2027 | each_reflog_ent_fn fn, void *cb_data) | |
2028 | { | |
2029 | return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data); | |
2030 | } | |
2031 | ||
2032 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, | |
2033 | void *cb_data) | |
2034 | { | |
2035 | return refs_for_each_reflog_ent(get_main_ref_store(the_repository), refname, | |
2036 | fn, cb_data); | |
2037 | } | |
2038 | ||
2039 | int refs_reflog_exists(struct ref_store *refs, const char *refname) | |
2040 | { | |
2041 | return refs->be->reflog_exists(refs, refname); | |
2042 | } | |
2043 | ||
2044 | int reflog_exists(const char *refname) | |
2045 | { | |
2046 | return refs_reflog_exists(get_main_ref_store(the_repository), refname); | |
2047 | } | |
2048 | ||
2049 | int refs_create_reflog(struct ref_store *refs, const char *refname, | |
2050 | int force_create, struct strbuf *err) | |
2051 | { | |
2052 | return refs->be->create_reflog(refs, refname, force_create, err); | |
2053 | } | |
2054 | ||
2055 | int safe_create_reflog(const char *refname, int force_create, | |
2056 | struct strbuf *err) | |
2057 | { | |
2058 | return refs_create_reflog(get_main_ref_store(the_repository), refname, | |
2059 | force_create, err); | |
2060 | } | |
2061 | ||
2062 | int refs_delete_reflog(struct ref_store *refs, const char *refname) | |
2063 | { | |
2064 | return refs->be->delete_reflog(refs, refname); | |
2065 | } | |
2066 | ||
2067 | int delete_reflog(const char *refname) | |
2068 | { | |
2069 | return refs_delete_reflog(get_main_ref_store(the_repository), refname); | |
2070 | } | |
2071 | ||
2072 | int refs_reflog_expire(struct ref_store *refs, | |
2073 | const char *refname, const struct object_id *oid, | |
2074 | unsigned int flags, | |
2075 | reflog_expiry_prepare_fn prepare_fn, | |
2076 | reflog_expiry_should_prune_fn should_prune_fn, | |
2077 | reflog_expiry_cleanup_fn cleanup_fn, | |
2078 | void *policy_cb_data) | |
2079 | { | |
2080 | return refs->be->reflog_expire(refs, refname, oid, flags, | |
2081 | prepare_fn, should_prune_fn, | |
2082 | cleanup_fn, policy_cb_data); | |
2083 | } | |
2084 | ||
2085 | int reflog_expire(const char *refname, const struct object_id *oid, | |
2086 | unsigned int flags, | |
2087 | reflog_expiry_prepare_fn prepare_fn, | |
2088 | reflog_expiry_should_prune_fn should_prune_fn, | |
2089 | reflog_expiry_cleanup_fn cleanup_fn, | |
2090 | void *policy_cb_data) | |
2091 | { | |
2092 | return refs_reflog_expire(get_main_ref_store(the_repository), | |
2093 | refname, oid, flags, | |
2094 | prepare_fn, should_prune_fn, | |
2095 | cleanup_fn, policy_cb_data); | |
2096 | } | |
2097 | ||
2098 | int initial_ref_transaction_commit(struct ref_transaction *transaction, | |
2099 | struct strbuf *err) | |
2100 | { | |
2101 | struct ref_store *refs = transaction->ref_store; | |
2102 | ||
2103 | return refs->be->initial_transaction_commit(refs, transaction, err); | |
2104 | } | |
2105 | ||
2106 | int refs_delete_refs(struct ref_store *refs, const char *msg, | |
2107 | struct string_list *refnames, unsigned int flags) | |
2108 | { | |
2109 | return refs->be->delete_refs(refs, msg, refnames, flags); | |
2110 | } | |
2111 | ||
2112 | int delete_refs(const char *msg, struct string_list *refnames, | |
2113 | unsigned int flags) | |
2114 | { | |
2115 | return refs_delete_refs(get_main_ref_store(the_repository), msg, refnames, flags); | |
2116 | } | |
2117 | ||
2118 | int refs_rename_ref(struct ref_store *refs, const char *oldref, | |
2119 | const char *newref, const char *logmsg) | |
2120 | { | |
2121 | return refs->be->rename_ref(refs, oldref, newref, logmsg); | |
2122 | } | |
2123 | ||
2124 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) | |
2125 | { | |
2126 | return refs_rename_ref(get_main_ref_store(the_repository), oldref, newref, logmsg); | |
2127 | } | |
2128 | ||
2129 | int refs_copy_existing_ref(struct ref_store *refs, const char *oldref, | |
2130 | const char *newref, const char *logmsg) | |
2131 | { | |
2132 | return refs->be->copy_ref(refs, oldref, newref, logmsg); | |
2133 | } | |
2134 | ||
2135 | int copy_existing_ref(const char *oldref, const char *newref, const char *logmsg) | |
2136 | { | |
2137 | return refs_copy_existing_ref(get_main_ref_store(the_repository), oldref, newref, logmsg); | |
2138 | } |