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Commit | Line | Data |
---|---|---|
7bd9bcf3 MH |
1 | /* |
2 | * The backend-independent part of the reference module. | |
3 | */ | |
4 | ||
95fc7512 | 5 | #include "cache.h" |
7d4558c4 | 6 | #include "hashmap.h" |
697cc8ef | 7 | #include "lockfile.h" |
b05855b5 | 8 | #include "iterator.h" |
85023577 | 9 | #include "refs.h" |
4cb77009 | 10 | #include "refs/refs-internal.h" |
cf0adba7 JH |
11 | #include "object.h" |
12 | #include "tag.h" | |
5d0bc90e | 13 | #include "submodule.h" |
17eff96b | 14 | #include "worktree.h" |
3581d793 | 15 | |
3dce444f RS |
16 | /* |
17 | * List of all available backends | |
18 | */ | |
19 | static struct ref_storage_be *refs_backends = &refs_be_files; | |
20 | ||
21 | static struct ref_storage_be *find_ref_storage_backend(const char *name) | |
22 | { | |
23 | struct ref_storage_be *be; | |
24 | for (be = refs_backends; be; be = be->next) | |
25 | if (!strcmp(be->name, name)) | |
26 | return be; | |
27 | return NULL; | |
28 | } | |
29 | ||
30 | int ref_storage_backend_exists(const char *name) | |
31 | { | |
32 | return find_ref_storage_backend(name) != NULL; | |
33 | } | |
34 | ||
bc5fd6d3 | 35 | /* |
dde8a902 DT |
36 | * How to handle various characters in refnames: |
37 | * 0: An acceptable character for refs | |
5e650228 JH |
38 | * 1: End-of-component |
39 | * 2: ., look for a preceding . to reject .. in refs | |
40 | * 3: {, look for a preceding @ to reject @{ in refs | |
53a8555e | 41 | * 4: A bad character: ASCII control characters, and |
cd377f45 JK |
42 | * ":", "?", "[", "\", "^", "~", SP, or TAB |
43 | * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set | |
dde8a902 DT |
44 | */ |
45 | static unsigned char refname_disposition[256] = { | |
5e650228 JH |
46 | 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
47 | 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
cd377f45 | 48 | 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1, |
5e650228 | 49 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4, |
dde8a902 | 50 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
5e650228 JH |
51 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0, |
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, 3, 0, 0, 4, 4 | |
dde8a902 DT |
54 | }; |
55 | ||
56 | /* | |
57 | * Try to read one refname component from the front of refname. | |
58 | * Return the length of the component found, or -1 if the component is | |
59 | * not legal. It is legal if it is something reasonable to have under | |
60 | * ".git/refs/"; We do not like it if: | |
bc5fd6d3 MH |
61 | * |
62 | * - any path component of it begins with ".", or | |
63 | * - it has double dots "..", or | |
53a8555e | 64 | * - it has ASCII control characters, or |
cd377f45 JK |
65 | * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or |
66 | * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or | |
53a8555e JK |
67 | * - it ends with a "/", or |
68 | * - it ends with ".lock", or | |
69 | * - it contains a "@{" portion | |
bc5fd6d3 | 70 | */ |
cd377f45 | 71 | static int check_refname_component(const char *refname, int *flags) |
bc5fd6d3 MH |
72 | { |
73 | const char *cp; | |
74 | char last = '\0'; | |
75 | ||
76 | for (cp = refname; ; cp++) { | |
dde8a902 DT |
77 | int ch = *cp & 255; |
78 | unsigned char disp = refname_disposition[ch]; | |
79 | switch (disp) { | |
5e650228 | 80 | case 1: |
dde8a902 | 81 | goto out; |
5e650228 | 82 | case 2: |
dde8a902 DT |
83 | if (last == '.') |
84 | return -1; /* Refname contains "..". */ | |
85 | break; | |
5e650228 | 86 | case 3: |
dde8a902 DT |
87 | if (last == '@') |
88 | return -1; /* Refname contains "@{". */ | |
bc5fd6d3 | 89 | break; |
5e650228 | 90 | case 4: |
dde8a902 | 91 | return -1; |
cd377f45 JK |
92 | case 5: |
93 | if (!(*flags & REFNAME_REFSPEC_PATTERN)) | |
94 | return -1; /* refspec can't be a pattern */ | |
95 | ||
96 | /* | |
97 | * Unset the pattern flag so that we only accept | |
98 | * a single asterisk for one side of refspec. | |
99 | */ | |
100 | *flags &= ~ REFNAME_REFSPEC_PATTERN; | |
101 | break; | |
dde8a902 | 102 | } |
bc5fd6d3 MH |
103 | last = ch; |
104 | } | |
dde8a902 | 105 | out: |
bc5fd6d3 | 106 | if (cp == refname) |
dac529e4 | 107 | return 0; /* Component has zero length. */ |
f3cc52d8 JN |
108 | if (refname[0] == '.') |
109 | return -1; /* Component starts with '.'. */ | |
7108ad23 MH |
110 | if (cp - refname >= LOCK_SUFFIX_LEN && |
111 | !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN)) | |
bc5fd6d3 MH |
112 | return -1; /* Refname ends with ".lock". */ |
113 | return cp - refname; | |
114 | } | |
115 | ||
5e650228 | 116 | int check_refname_format(const char *refname, int flags) |
bc5fd6d3 MH |
117 | { |
118 | int component_len, component_count = 0; | |
119 | ||
9ba89f48 FC |
120 | if (!strcmp(refname, "@")) |
121 | /* Refname is a single character '@'. */ | |
122 | return -1; | |
123 | ||
bc5fd6d3 MH |
124 | while (1) { |
125 | /* We are at the start of a path component. */ | |
cd377f45 JK |
126 | component_len = check_refname_component(refname, &flags); |
127 | if (component_len <= 0) | |
128 | return -1; | |
129 | ||
bc5fd6d3 MH |
130 | component_count++; |
131 | if (refname[component_len] == '\0') | |
132 | break; | |
133 | /* Skip to next component. */ | |
134 | refname += component_len + 1; | |
135 | } | |
136 | ||
137 | if (refname[component_len - 1] == '.') | |
138 | return -1; /* Refname ends with '.'. */ | |
139 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) | |
140 | return -1; /* Refname has only one component. */ | |
141 | return 0; | |
142 | } | |
143 | ||
4cb77009 | 144 | int refname_is_safe(const char *refname) |
d0f810f0 | 145 | { |
39950fef MH |
146 | const char *rest; |
147 | ||
148 | if (skip_prefix(refname, "refs/", &rest)) { | |
d0f810f0 RS |
149 | char *buf; |
150 | int result; | |
e40f3557 MH |
151 | size_t restlen = strlen(rest); |
152 | ||
153 | /* rest must not be empty, or start or end with "/" */ | |
154 | if (!restlen || *rest == '/' || rest[restlen - 1] == '/') | |
155 | return 0; | |
d0f810f0 | 156 | |
d0f810f0 RS |
157 | /* |
158 | * Does the refname try to escape refs/? | |
159 | * For example: refs/foo/../bar is safe but refs/foo/../../bar | |
160 | * is not. | |
161 | */ | |
e40f3557 MH |
162 | buf = xmallocz(restlen); |
163 | result = !normalize_path_copy(buf, rest) && !strcmp(buf, rest); | |
d0f810f0 RS |
164 | free(buf); |
165 | return result; | |
166 | } | |
35db25c6 MH |
167 | |
168 | do { | |
d0f810f0 RS |
169 | if (!isupper(*refname) && *refname != '_') |
170 | return 0; | |
171 | refname++; | |
35db25c6 | 172 | } while (*refname); |
d0f810f0 RS |
173 | return 1; |
174 | } | |
175 | ||
7d2df051 NTND |
176 | char *refs_resolve_refdup(struct ref_store *refs, |
177 | const char *refname, int resolve_flags, | |
178 | unsigned char *sha1, int *flags) | |
179 | { | |
180 | const char *result; | |
181 | ||
182 | result = refs_resolve_ref_unsafe(refs, refname, resolve_flags, | |
183 | sha1, flags); | |
184 | return xstrdup_or_null(result); | |
185 | } | |
186 | ||
7bd9bcf3 MH |
187 | char *resolve_refdup(const char *refname, int resolve_flags, |
188 | unsigned char *sha1, int *flags) | |
e1e22e37 | 189 | { |
7d2df051 NTND |
190 | return refs_resolve_refdup(get_main_ref_store(), |
191 | refname, resolve_flags, | |
192 | sha1, flags); | |
cddc4258 MH |
193 | } |
194 | ||
7bd9bcf3 MH |
195 | /* The argument to filter_refs */ |
196 | struct ref_filter { | |
197 | const char *pattern; | |
198 | each_ref_fn *fn; | |
199 | void *cb_data; | |
200 | }; | |
432ad41e | 201 | |
7d2df051 NTND |
202 | int refs_read_ref_full(struct ref_store *refs, const char *refname, |
203 | int resolve_flags, unsigned char *sha1, int *flags) | |
732134ed | 204 | { |
7d2df051 | 205 | if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, sha1, flags)) |
7bd9bcf3 MH |
206 | return 0; |
207 | return -1; | |
732134ed MH |
208 | } |
209 | ||
7d2df051 NTND |
210 | int read_ref_full(const char *refname, int resolve_flags, unsigned char *sha1, int *flags) |
211 | { | |
212 | return refs_read_ref_full(get_main_ref_store(), refname, | |
213 | resolve_flags, sha1, flags); | |
214 | } | |
215 | ||
7bd9bcf3 | 216 | int read_ref(const char *refname, unsigned char *sha1) |
cddc4258 | 217 | { |
7bd9bcf3 | 218 | return read_ref_full(refname, RESOLVE_REF_READING, sha1, NULL); |
c774aab9 JP |
219 | } |
220 | ||
7bd9bcf3 | 221 | int ref_exists(const char *refname) |
bc5fd6d3 | 222 | { |
7bd9bcf3 MH |
223 | unsigned char sha1[20]; |
224 | return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, sha1, NULL); | |
bc5fd6d3 MH |
225 | } |
226 | ||
7bd9bcf3 MH |
227 | static int filter_refs(const char *refname, const struct object_id *oid, |
228 | int flags, void *data) | |
432ad41e | 229 | { |
7bd9bcf3 MH |
230 | struct ref_filter *filter = (struct ref_filter *)data; |
231 | ||
232 | if (wildmatch(filter->pattern, refname, 0, NULL)) | |
233 | return 0; | |
234 | return filter->fn(refname, oid, flags, filter->cb_data); | |
432ad41e MH |
235 | } |
236 | ||
7bd9bcf3 | 237 | enum peel_status peel_object(const unsigned char *name, unsigned char *sha1) |
c774aab9 | 238 | { |
7bd9bcf3 | 239 | struct object *o = lookup_unknown_object(name); |
c774aab9 | 240 | |
7bd9bcf3 MH |
241 | if (o->type == OBJ_NONE) { |
242 | int type = sha1_object_info(name, NULL); | |
243 | if (type < 0 || !object_as_type(o, type, 0)) | |
244 | return PEEL_INVALID; | |
245 | } | |
bc5fd6d3 | 246 | |
7bd9bcf3 MH |
247 | if (o->type != OBJ_TAG) |
248 | return PEEL_NON_TAG; | |
e1980c9d | 249 | |
7bd9bcf3 MH |
250 | o = deref_tag_noverify(o); |
251 | if (!o) | |
252 | return PEEL_INVALID; | |
253 | ||
844a9ce4 | 254 | hashcpy(sha1, o->oid.hash); |
7bd9bcf3 | 255 | return PEEL_PEELED; |
e1980c9d JH |
256 | } |
257 | ||
7bd9bcf3 MH |
258 | struct warn_if_dangling_data { |
259 | FILE *fp; | |
260 | const char *refname; | |
261 | const struct string_list *refnames; | |
262 | const char *msg_fmt; | |
263 | }; | |
bc5fd6d3 | 264 | |
7bd9bcf3 MH |
265 | static int warn_if_dangling_symref(const char *refname, const struct object_id *oid, |
266 | int flags, void *cb_data) | |
267 | { | |
268 | struct warn_if_dangling_data *d = cb_data; | |
269 | const char *resolves_to; | |
270 | struct object_id junk; | |
bc5fd6d3 | 271 | |
7bd9bcf3 MH |
272 | if (!(flags & REF_ISSYMREF)) |
273 | return 0; | |
bc5fd6d3 | 274 | |
7bd9bcf3 MH |
275 | resolves_to = resolve_ref_unsafe(refname, 0, junk.hash, NULL); |
276 | if (!resolves_to | |
277 | || (d->refname | |
278 | ? strcmp(resolves_to, d->refname) | |
279 | : !string_list_has_string(d->refnames, resolves_to))) { | |
280 | return 0; | |
281 | } | |
bc5fd6d3 | 282 | |
7bd9bcf3 MH |
283 | fprintf(d->fp, d->msg_fmt, refname); |
284 | fputc('\n', d->fp); | |
285 | return 0; | |
bc5fd6d3 MH |
286 | } |
287 | ||
7bd9bcf3 | 288 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f348ac92 | 289 | { |
7bd9bcf3 MH |
290 | struct warn_if_dangling_data data; |
291 | ||
292 | data.fp = fp; | |
293 | data.refname = refname; | |
294 | data.refnames = NULL; | |
295 | data.msg_fmt = msg_fmt; | |
296 | for_each_rawref(warn_if_dangling_symref, &data); | |
f348ac92 MH |
297 | } |
298 | ||
7bd9bcf3 | 299 | void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames) |
432ad41e | 300 | { |
7bd9bcf3 | 301 | struct warn_if_dangling_data data; |
432ad41e | 302 | |
7bd9bcf3 MH |
303 | data.fp = fp; |
304 | data.refname = NULL; | |
305 | data.refnames = refnames; | |
306 | data.msg_fmt = msg_fmt; | |
307 | for_each_rawref(warn_if_dangling_symref, &data); | |
432ad41e MH |
308 | } |
309 | ||
7d2df051 NTND |
310 | int refs_for_each_tag_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
311 | { | |
312 | return refs_for_each_ref_in(refs, "refs/tags/", fn, cb_data); | |
313 | } | |
314 | ||
7bd9bcf3 | 315 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 316 | { |
7d2df051 | 317 | return refs_for_each_tag_ref(get_main_ref_store(), fn, cb_data); |
432ad41e MH |
318 | } |
319 | ||
7bd9bcf3 | 320 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
506a760d | 321 | { |
7d2df051 NTND |
322 | return refs_for_each_tag_ref(get_submodule_ref_store(submodule), |
323 | fn, cb_data); | |
324 | } | |
325 | ||
326 | int refs_for_each_branch_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
327 | { | |
328 | return refs_for_each_ref_in(refs, "refs/heads/", fn, cb_data); | |
432ad41e MH |
329 | } |
330 | ||
7bd9bcf3 | 331 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 332 | { |
7d2df051 | 333 | return refs_for_each_branch_ref(get_main_ref_store(), fn, cb_data); |
432ad41e MH |
334 | } |
335 | ||
7bd9bcf3 | 336 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
202a56a9 | 337 | { |
7d2df051 NTND |
338 | return refs_for_each_branch_ref(get_submodule_ref_store(submodule), |
339 | fn, cb_data); | |
340 | } | |
341 | ||
342 | int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
343 | { | |
344 | return refs_for_each_ref_in(refs, "refs/remotes/", fn, cb_data); | |
202a56a9 | 345 | } |
432ad41e | 346 | |
7bd9bcf3 | 347 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
e9c4c111 | 348 | { |
7d2df051 | 349 | return refs_for_each_remote_ref(get_main_ref_store(), fn, cb_data); |
202a56a9 MH |
350 | } |
351 | ||
7bd9bcf3 | 352 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
e9c4c111 | 353 | { |
7d2df051 NTND |
354 | return refs_for_each_remote_ref(get_submodule_ref_store(submodule), |
355 | fn, cb_data); | |
662428f4 | 356 | } |
c774aab9 | 357 | |
7bd9bcf3 MH |
358 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
359 | { | |
360 | struct strbuf buf = STRBUF_INIT; | |
361 | int ret = 0; | |
362 | struct object_id oid; | |
363 | int flag; | |
c774aab9 | 364 | |
7bd9bcf3 MH |
365 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); |
366 | if (!read_ref_full(buf.buf, RESOLVE_REF_READING, oid.hash, &flag)) | |
367 | ret = fn(buf.buf, &oid, flag, cb_data); | |
368 | strbuf_release(&buf); | |
c774aab9 | 369 | |
7bd9bcf3 | 370 | return ret; |
e9c4c111 | 371 | } |
c774aab9 | 372 | |
7bd9bcf3 MH |
373 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
374 | const char *prefix, void *cb_data) | |
662428f4 | 375 | { |
7bd9bcf3 MH |
376 | struct strbuf real_pattern = STRBUF_INIT; |
377 | struct ref_filter filter; | |
378 | int ret; | |
d08bae7e | 379 | |
59556548 | 380 | if (!prefix && !starts_with(pattern, "refs/")) |
d08bae7e | 381 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
382 | else if (prefix) |
383 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
384 | strbuf_addstr(&real_pattern, pattern); |
385 | ||
894a9d33 | 386 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 387 | /* Append implied '/' '*' if not present. */ |
00b6c178 | 388 | strbuf_complete(&real_pattern, '/'); |
d08bae7e IL |
389 | /* No need to check for '*', there is none. */ |
390 | strbuf_addch(&real_pattern, '*'); | |
391 | } | |
392 | ||
393 | filter.pattern = real_pattern.buf; | |
394 | filter.fn = fn; | |
395 | filter.cb_data = cb_data; | |
396 | ret = for_each_ref(filter_refs, &filter); | |
397 | ||
398 | strbuf_release(&real_pattern); | |
399 | return ret; | |
400 | } | |
401 | ||
b09fe971 IL |
402 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
403 | { | |
404 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
405 | } | |
406 | ||
4577e483 | 407 | const char *prettify_refname(const char *name) |
a9c37a72 | 408 | { |
3e5b36c6 SG |
409 | if (skip_prefix(name, "refs/heads/", &name) || |
410 | skip_prefix(name, "refs/tags/", &name) || | |
411 | skip_prefix(name, "refs/remotes/", &name)) | |
412 | ; /* nothing */ | |
413 | return name; | |
a9c37a72 DB |
414 | } |
415 | ||
54457fe5 | 416 | static const char *ref_rev_parse_rules[] = { |
79803322 SP |
417 | "%.*s", |
418 | "refs/%.*s", | |
419 | "refs/tags/%.*s", | |
420 | "refs/heads/%.*s", | |
421 | "refs/remotes/%.*s", | |
422 | "refs/remotes/%.*s/HEAD", | |
423 | NULL | |
424 | }; | |
425 | ||
54457fe5 | 426 | int refname_match(const char *abbrev_name, const char *full_name) |
79803322 SP |
427 | { |
428 | const char **p; | |
429 | const int abbrev_name_len = strlen(abbrev_name); | |
430 | ||
54457fe5 | 431 | for (p = ref_rev_parse_rules; *p; p++) { |
79803322 SP |
432 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { |
433 | return 1; | |
434 | } | |
435 | } | |
436 | ||
437 | return 0; | |
438 | } | |
439 | ||
ff74f7f1 JH |
440 | /* |
441 | * *string and *len will only be substituted, and *string returned (for | |
442 | * later free()ing) if the string passed in is a magic short-hand form | |
443 | * to name a branch. | |
444 | */ | |
445 | static char *substitute_branch_name(const char **string, int *len) | |
446 | { | |
447 | struct strbuf buf = STRBUF_INIT; | |
0e9f62da | 448 | int ret = interpret_branch_name(*string, *len, &buf, 0); |
ff74f7f1 JH |
449 | |
450 | if (ret == *len) { | |
451 | size_t size; | |
452 | *string = strbuf_detach(&buf, &size); | |
453 | *len = size; | |
454 | return (char *)*string; | |
455 | } | |
456 | ||
457 | return NULL; | |
458 | } | |
459 | ||
460 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
461 | { | |
462 | char *last_branch = substitute_branch_name(&str, &len); | |
41da7111 NTND |
463 | int refs_found = expand_ref(str, len, sha1, ref); |
464 | free(last_branch); | |
465 | return refs_found; | |
466 | } | |
467 | ||
468 | int expand_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
469 | { | |
ff74f7f1 JH |
470 | const char **p, *r; |
471 | int refs_found = 0; | |
6cd4a898 | 472 | struct strbuf fullref = STRBUF_INIT; |
ff74f7f1 JH |
473 | |
474 | *ref = NULL; | |
475 | for (p = ref_rev_parse_rules; *p; p++) { | |
ff74f7f1 JH |
476 | unsigned char sha1_from_ref[20]; |
477 | unsigned char *this_result; | |
478 | int flag; | |
479 | ||
480 | this_result = refs_found ? sha1_from_ref : sha1; | |
6cd4a898 JK |
481 | strbuf_reset(&fullref); |
482 | strbuf_addf(&fullref, *p, len, str); | |
483 | r = resolve_ref_unsafe(fullref.buf, RESOLVE_REF_READING, | |
7695d118 | 484 | this_result, &flag); |
ff74f7f1 JH |
485 | if (r) { |
486 | if (!refs_found++) | |
487 | *ref = xstrdup(r); | |
488 | if (!warn_ambiguous_refs) | |
489 | break; | |
6cd4a898 JK |
490 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) { |
491 | warning("ignoring dangling symref %s.", fullref.buf); | |
492 | } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) { | |
493 | warning("ignoring broken ref %s.", fullref.buf); | |
55956350 | 494 | } |
ff74f7f1 | 495 | } |
6cd4a898 | 496 | strbuf_release(&fullref); |
ff74f7f1 JH |
497 | return refs_found; |
498 | } | |
499 | ||
500 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
501 | { | |
502 | char *last_branch = substitute_branch_name(&str, &len); | |
503 | const char **p; | |
504 | int logs_found = 0; | |
6cd4a898 | 505 | struct strbuf path = STRBUF_INIT; |
ff74f7f1 JH |
506 | |
507 | *log = NULL; | |
508 | for (p = ref_rev_parse_rules; *p; p++) { | |
ff74f7f1 | 509 | unsigned char hash[20]; |
ff74f7f1 JH |
510 | const char *ref, *it; |
511 | ||
6cd4a898 JK |
512 | strbuf_reset(&path); |
513 | strbuf_addf(&path, *p, len, str); | |
514 | ref = resolve_ref_unsafe(path.buf, RESOLVE_REF_READING, | |
7695d118 | 515 | hash, NULL); |
ff74f7f1 JH |
516 | if (!ref) |
517 | continue; | |
6cd4a898 JK |
518 | if (reflog_exists(path.buf)) |
519 | it = path.buf; | |
520 | else if (strcmp(ref, path.buf) && reflog_exists(ref)) | |
ff74f7f1 JH |
521 | it = ref; |
522 | else | |
523 | continue; | |
524 | if (!logs_found++) { | |
525 | *log = xstrdup(it); | |
526 | hashcpy(sha1, hash); | |
527 | } | |
7bd9bcf3 MH |
528 | if (!warn_ambiguous_refs) |
529 | break; | |
c0277d15 | 530 | } |
6cd4a898 | 531 | strbuf_release(&path); |
7bd9bcf3 MH |
532 | free(last_branch); |
533 | return logs_found; | |
2ddb5d17 BK |
534 | } |
535 | ||
266b1827 DT |
536 | static int is_per_worktree_ref(const char *refname) |
537 | { | |
ce414b33 DT |
538 | return !strcmp(refname, "HEAD") || |
539 | starts_with(refname, "refs/bisect/"); | |
266b1827 DT |
540 | } |
541 | ||
542 | static int is_pseudoref_syntax(const char *refname) | |
543 | { | |
544 | const char *c; | |
545 | ||
546 | for (c = refname; *c; c++) { | |
547 | if (!isupper(*c) && *c != '-' && *c != '_') | |
548 | return 0; | |
549 | } | |
550 | ||
551 | return 1; | |
552 | } | |
553 | ||
554 | enum ref_type ref_type(const char *refname) | |
555 | { | |
556 | if (is_per_worktree_ref(refname)) | |
557 | return REF_TYPE_PER_WORKTREE; | |
558 | if (is_pseudoref_syntax(refname)) | |
559 | return REF_TYPE_PSEUDOREF; | |
560 | return REF_TYPE_NORMAL; | |
561 | } | |
562 | ||
74ec19d4 DT |
563 | static int write_pseudoref(const char *pseudoref, const unsigned char *sha1, |
564 | const unsigned char *old_sha1, struct strbuf *err) | |
565 | { | |
566 | const char *filename; | |
567 | int fd; | |
568 | static struct lock_file lock; | |
569 | struct strbuf buf = STRBUF_INIT; | |
570 | int ret = -1; | |
571 | ||
572 | strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1)); | |
573 | ||
574 | filename = git_path("%s", pseudoref); | |
575 | fd = hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR); | |
576 | if (fd < 0) { | |
0568c8e9 | 577 | strbuf_addf(err, "could not open '%s' for writing: %s", |
74ec19d4 DT |
578 | filename, strerror(errno)); |
579 | return -1; | |
580 | } | |
581 | ||
582 | if (old_sha1) { | |
583 | unsigned char actual_old_sha1[20]; | |
2c3aed13 DT |
584 | |
585 | if (read_ref(pseudoref, actual_old_sha1)) | |
586 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 | 587 | if (hashcmp(actual_old_sha1, old_sha1)) { |
0568c8e9 | 588 | strbuf_addf(err, "unexpected sha1 when writing '%s'", pseudoref); |
74ec19d4 DT |
589 | rollback_lock_file(&lock); |
590 | goto done; | |
591 | } | |
592 | } | |
593 | ||
594 | if (write_in_full(fd, buf.buf, buf.len) != buf.len) { | |
0568c8e9 | 595 | strbuf_addf(err, "could not write to '%s'", filename); |
74ec19d4 DT |
596 | rollback_lock_file(&lock); |
597 | goto done; | |
598 | } | |
599 | ||
600 | commit_lock_file(&lock); | |
601 | ret = 0; | |
602 | done: | |
603 | strbuf_release(&buf); | |
604 | return ret; | |
605 | } | |
606 | ||
607 | static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1) | |
608 | { | |
609 | static struct lock_file lock; | |
610 | const char *filename; | |
611 | ||
612 | filename = git_path("%s", pseudoref); | |
613 | ||
614 | if (old_sha1 && !is_null_sha1(old_sha1)) { | |
615 | int fd; | |
616 | unsigned char actual_old_sha1[20]; | |
617 | ||
618 | fd = hold_lock_file_for_update(&lock, filename, | |
619 | LOCK_DIE_ON_ERROR); | |
620 | if (fd < 0) | |
621 | die_errno(_("Could not open '%s' for writing"), filename); | |
2c3aed13 DT |
622 | if (read_ref(pseudoref, actual_old_sha1)) |
623 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 DT |
624 | if (hashcmp(actual_old_sha1, old_sha1)) { |
625 | warning("Unexpected sha1 when deleting %s", pseudoref); | |
626 | rollback_lock_file(&lock); | |
627 | return -1; | |
a4c653df | 628 | } |
74ec19d4 DT |
629 | |
630 | unlink(filename); | |
631 | rollback_lock_file(&lock); | |
632 | } else { | |
633 | unlink(filename); | |
4bd18c43 | 634 | } |
a4c653df | 635 | |
4bd18c43 | 636 | return 0; |
95fc7512 | 637 | } |
d556fae2 | 638 | |
c0fe4e8b NTND |
639 | int refs_delete_ref(struct ref_store *refs, const char *msg, |
640 | const char *refname, | |
641 | const unsigned char *old_sha1, | |
642 | unsigned int flags) | |
41b625b0 | 643 | { |
7521cc46 | 644 | struct ref_transaction *transaction; |
a4c653df | 645 | struct strbuf err = STRBUF_INIT; |
8b5157e4 | 646 | |
c0fe4e8b NTND |
647 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { |
648 | assert(refs == get_main_ref_store()); | |
080cc646 | 649 | return delete_pseudoref(refname, old_sha1); |
c0fe4e8b | 650 | } |
d48744d1 | 651 | |
c0fe4e8b | 652 | transaction = ref_store_transaction_begin(refs, &err); |
7521cc46 | 653 | if (!transaction || |
fc67a082 | 654 | ref_transaction_delete(transaction, refname, old_sha1, |
755b49ae | 655 | flags, msg, &err) || |
db7516ab | 656 | ref_transaction_commit(transaction, &err)) { |
7521cc46 RS |
657 | error("%s", err.buf); |
658 | ref_transaction_free(transaction); | |
659 | strbuf_release(&err); | |
c0277d15 | 660 | return 1; |
41b625b0 | 661 | } |
7bd9bcf3 MH |
662 | ref_transaction_free(transaction); |
663 | strbuf_release(&err); | |
b531394d BC |
664 | return 0; |
665 | } | |
41b625b0 | 666 | |
c0fe4e8b NTND |
667 | int delete_ref(const char *msg, const char *refname, |
668 | const unsigned char *old_sha1, unsigned int flags) | |
669 | { | |
670 | return refs_delete_ref(get_main_ref_store(), msg, refname, | |
671 | old_sha1, flags); | |
672 | } | |
673 | ||
4cb77009 | 674 | int copy_reflog_msg(char *buf, const char *msg) |
0ec29a47 JH |
675 | { |
676 | char *cp = buf; | |
677 | char c; | |
678 | int wasspace = 1; | |
8b5157e4 | 679 | |
0ec29a47 JH |
680 | *cp++ = '\t'; |
681 | while ((c = *msg++)) { | |
682 | if (wasspace && isspace(c)) | |
683 | continue; | |
684 | wasspace = isspace(c); | |
685 | if (wasspace) | |
686 | c = ' '; | |
687 | *cp++ = c; | |
a4c653df | 688 | } |
0ec29a47 JH |
689 | while (buf < cp && isspace(cp[-1])) |
690 | cp--; | |
691 | *cp++ = '\n'; | |
692 | return cp - buf; | |
693 | } | |
8b5157e4 | 694 | |
4cb77009 | 695 | int should_autocreate_reflog(const char *refname) |
4e2bef57 | 696 | { |
341fb286 CW |
697 | switch (log_all_ref_updates) { |
698 | case LOG_REFS_ALWAYS: | |
699 | return 1; | |
700 | case LOG_REFS_NORMAL: | |
701 | return starts_with(refname, "refs/heads/") || | |
702 | starts_with(refname, "refs/remotes/") || | |
703 | starts_with(refname, "refs/notes/") || | |
704 | !strcmp(refname, "HEAD"); | |
705 | default: | |
4e2bef57 | 706 | return 0; |
341fb286 | 707 | } |
4e2bef57 DT |
708 | } |
709 | ||
e7e0f26e | 710 | int is_branch(const char *refname) |
c3b0dec5 | 711 | { |
59556548 | 712 | return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/"); |
41b625b0 NP |
713 | } |
714 | ||
4207ed28 RS |
715 | struct read_ref_at_cb { |
716 | const char *refname; | |
dddbad72 | 717 | timestamp_t at_time; |
4207ed28 RS |
718 | int cnt; |
719 | int reccnt; | |
720 | unsigned char *sha1; | |
721 | int found_it; | |
722 | ||
723 | unsigned char osha1[20]; | |
724 | unsigned char nsha1[20]; | |
725 | int tz; | |
dddbad72 | 726 | timestamp_t date; |
4207ed28 | 727 | char **msg; |
dddbad72 | 728 | timestamp_t *cutoff_time; |
4207ed28 RS |
729 | int *cutoff_tz; |
730 | int *cutoff_cnt; | |
731 | }; | |
732 | ||
9461d272 | 733 | static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid, |
dddbad72 | 734 | const char *email, timestamp_t timestamp, int tz, |
4207ed28 RS |
735 | const char *message, void *cb_data) |
736 | { | |
737 | struct read_ref_at_cb *cb = cb_data; | |
738 | ||
739 | cb->reccnt++; | |
740 | cb->tz = tz; | |
741 | cb->date = timestamp; | |
742 | ||
743 | if (timestamp <= cb->at_time || cb->cnt == 0) { | |
744 | if (cb->msg) | |
745 | *cb->msg = xstrdup(message); | |
746 | if (cb->cutoff_time) | |
747 | *cb->cutoff_time = timestamp; | |
748 | if (cb->cutoff_tz) | |
749 | *cb->cutoff_tz = tz; | |
750 | if (cb->cutoff_cnt) | |
751 | *cb->cutoff_cnt = cb->reccnt - 1; | |
752 | /* | |
753 | * we have not yet updated cb->[n|o]sha1 so they still | |
754 | * hold the values for the previous record. | |
755 | */ | |
756 | if (!is_null_sha1(cb->osha1)) { | |
9461d272 | 757 | hashcpy(cb->sha1, noid->hash); |
758 | if (hashcmp(cb->osha1, noid->hash)) | |
4207ed28 | 759 | warning("Log for ref %s has gap after %s.", |
a5481a6c | 760 | cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822))); |
4207ed28 RS |
761 | } |
762 | else if (cb->date == cb->at_time) | |
9461d272 | 763 | hashcpy(cb->sha1, noid->hash); |
764 | else if (hashcmp(noid->hash, cb->sha1)) | |
4207ed28 RS |
765 | warning("Log for ref %s unexpectedly ended on %s.", |
766 | cb->refname, show_date(cb->date, cb->tz, | |
a5481a6c | 767 | DATE_MODE(RFC2822))); |
9461d272 | 768 | hashcpy(cb->osha1, ooid->hash); |
769 | hashcpy(cb->nsha1, noid->hash); | |
4207ed28 RS |
770 | cb->found_it = 1; |
771 | return 1; | |
772 | } | |
9461d272 | 773 | hashcpy(cb->osha1, ooid->hash); |
774 | hashcpy(cb->nsha1, noid->hash); | |
4207ed28 RS |
775 | if (cb->cnt > 0) |
776 | cb->cnt--; | |
777 | return 0; | |
778 | } | |
779 | ||
9461d272 | 780 | static int read_ref_at_ent_oldest(struct object_id *ooid, struct object_id *noid, |
dddbad72 | 781 | const char *email, timestamp_t timestamp, |
4207ed28 RS |
782 | int tz, const char *message, void *cb_data) |
783 | { | |
784 | struct read_ref_at_cb *cb = cb_data; | |
785 | ||
786 | if (cb->msg) | |
787 | *cb->msg = xstrdup(message); | |
788 | if (cb->cutoff_time) | |
789 | *cb->cutoff_time = timestamp; | |
790 | if (cb->cutoff_tz) | |
791 | *cb->cutoff_tz = tz; | |
792 | if (cb->cutoff_cnt) | |
793 | *cb->cutoff_cnt = cb->reccnt; | |
9461d272 | 794 | hashcpy(cb->sha1, ooid->hash); |
4207ed28 | 795 | if (is_null_sha1(cb->sha1)) |
9461d272 | 796 | hashcpy(cb->sha1, noid->hash); |
4207ed28 RS |
797 | /* We just want the first entry */ |
798 | return 1; | |
16d7cc90 JH |
799 | } |
800 | ||
dddbad72 | 801 | int read_ref_at(const char *refname, unsigned int flags, timestamp_t at_time, int cnt, |
dfefa935 | 802 | unsigned char *sha1, char **msg, |
dddbad72 | 803 | timestamp_t *cutoff_time, int *cutoff_tz, int *cutoff_cnt) |
d556fae2 | 804 | { |
4207ed28 | 805 | struct read_ref_at_cb cb; |
d556fae2 | 806 | |
4207ed28 RS |
807 | memset(&cb, 0, sizeof(cb)); |
808 | cb.refname = refname; | |
809 | cb.at_time = at_time; | |
810 | cb.cnt = cnt; | |
811 | cb.msg = msg; | |
812 | cb.cutoff_time = cutoff_time; | |
813 | cb.cutoff_tz = cutoff_tz; | |
814 | cb.cutoff_cnt = cutoff_cnt; | |
815 | cb.sha1 = sha1; | |
816 | ||
817 | for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb); | |
818 | ||
c41a87dd DA |
819 | if (!cb.reccnt) { |
820 | if (flags & GET_SHA1_QUIETLY) | |
821 | exit(128); | |
822 | else | |
823 | die("Log for %s is empty.", refname); | |
824 | } | |
4207ed28 RS |
825 | if (cb.found_it) |
826 | return 0; | |
827 | ||
828 | for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb); | |
d556fae2 | 829 | |
16d7cc90 | 830 | return 1; |
d556fae2 | 831 | } |
2ff81662 | 832 | |
c0fe4e8b NTND |
833 | struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs, |
834 | struct strbuf *err) | |
caa4046c | 835 | { |
c0fe4e8b | 836 | struct ref_transaction *tr; |
5a603b04 JN |
837 | assert(err); |
838 | ||
c0fe4e8b NTND |
839 | tr = xcalloc(1, sizeof(struct ref_transaction)); |
840 | tr->ref_store = refs; | |
841 | return tr; | |
842 | } | |
843 | ||
844 | struct ref_transaction *ref_transaction_begin(struct strbuf *err) | |
845 | { | |
846 | return ref_store_transaction_begin(get_main_ref_store(), err); | |
caa4046c MH |
847 | } |
848 | ||
026bd1d3 | 849 | void ref_transaction_free(struct ref_transaction *transaction) |
caa4046c | 850 | { |
43a2dfde | 851 | size_t i; |
caa4046c | 852 | |
1b07255c RS |
853 | if (!transaction) |
854 | return; | |
855 | ||
30173b88 MH |
856 | switch (transaction->state) { |
857 | case REF_TRANSACTION_OPEN: | |
858 | case REF_TRANSACTION_CLOSED: | |
859 | /* OK */ | |
860 | break; | |
861 | case REF_TRANSACTION_PREPARED: | |
862 | die("BUG: free called on a prepared reference transaction"); | |
863 | break; | |
864 | default: | |
865 | die("BUG: unexpected reference transaction state"); | |
866 | break; | |
867 | } | |
868 | ||
db7516ab RS |
869 | for (i = 0; i < transaction->nr; i++) { |
870 | free(transaction->updates[i]->msg); | |
88615910 | 871 | free(transaction->updates[i]); |
db7516ab | 872 | } |
caa4046c MH |
873 | free(transaction->updates); |
874 | free(transaction); | |
875 | } | |
876 | ||
71564516 MH |
877 | struct ref_update *ref_transaction_add_update( |
878 | struct ref_transaction *transaction, | |
879 | const char *refname, unsigned int flags, | |
880 | const unsigned char *new_sha1, | |
881 | const unsigned char *old_sha1, | |
882 | const char *msg) | |
caa4046c | 883 | { |
96ffc06f | 884 | struct ref_update *update; |
71564516 MH |
885 | |
886 | if (transaction->state != REF_TRANSACTION_OPEN) | |
887 | die("BUG: update called for transaction that is not open"); | |
888 | ||
889 | if ((flags & REF_ISPRUNING) && !(flags & REF_NODEREF)) | |
890 | die("BUG: REF_ISPRUNING set without REF_NODEREF"); | |
891 | ||
96ffc06f | 892 | FLEX_ALLOC_STR(update, refname, refname); |
caa4046c MH |
893 | ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc); |
894 | transaction->updates[transaction->nr++] = update; | |
71564516 MH |
895 | |
896 | update->flags = flags; | |
897 | ||
898 | if (flags & REF_HAVE_NEW) | |
98491298 | 899 | hashcpy(update->new_oid.hash, new_sha1); |
71564516 | 900 | if (flags & REF_HAVE_OLD) |
98491298 | 901 | hashcpy(update->old_oid.hash, old_sha1); |
13092a91 | 902 | update->msg = xstrdup_or_null(msg); |
caa4046c MH |
903 | return update; |
904 | } | |
905 | ||
8e34800e RS |
906 | int ref_transaction_update(struct ref_transaction *transaction, |
907 | const char *refname, | |
908 | const unsigned char *new_sha1, | |
909 | const unsigned char *old_sha1, | |
1d147bdf | 910 | unsigned int flags, const char *msg, |
8e34800e | 911 | struct strbuf *err) |
caa4046c | 912 | { |
5a603b04 JN |
913 | assert(err); |
914 | ||
8a679de6 MH |
915 | if ((new_sha1 && !is_null_sha1(new_sha1)) ? |
916 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) : | |
917 | !refname_is_safe(refname)) { | |
0568c8e9 | 918 | strbuf_addf(err, "refusing to update ref with bad name '%s'", |
d0f810f0 RS |
919 | refname); |
920 | return -1; | |
921 | } | |
922 | ||
71564516 MH |
923 | flags |= (new_sha1 ? REF_HAVE_NEW : 0) | (old_sha1 ? REF_HAVE_OLD : 0); |
924 | ||
925 | ref_transaction_add_update(transaction, refname, flags, | |
926 | new_sha1, old_sha1, msg); | |
8e34800e | 927 | return 0; |
caa4046c MH |
928 | } |
929 | ||
b416af5b RS |
930 | int ref_transaction_create(struct ref_transaction *transaction, |
931 | const char *refname, | |
932 | const unsigned char *new_sha1, | |
fec14ec3 | 933 | unsigned int flags, const char *msg, |
b416af5b | 934 | struct strbuf *err) |
caa4046c | 935 | { |
f04c5b55 MH |
936 | if (!new_sha1 || is_null_sha1(new_sha1)) |
937 | die("BUG: create called without valid new_sha1"); | |
bc9f2925 | 938 | return ref_transaction_update(transaction, refname, new_sha1, |
1d147bdf | 939 | null_sha1, flags, msg, err); |
caa4046c MH |
940 | } |
941 | ||
8c8bdc0d RS |
942 | int ref_transaction_delete(struct ref_transaction *transaction, |
943 | const char *refname, | |
944 | const unsigned char *old_sha1, | |
fb5a6bb6 | 945 | unsigned int flags, const char *msg, |
8c8bdc0d | 946 | struct strbuf *err) |
caa4046c | 947 | { |
60294596 MH |
948 | if (old_sha1 && is_null_sha1(old_sha1)) |
949 | die("BUG: delete called with old_sha1 set to zeros"); | |
1d147bdf | 950 | return ref_transaction_update(transaction, refname, |
fb5a6bb6 | 951 | null_sha1, old_sha1, |
1d147bdf | 952 | flags, msg, err); |
caa4046c MH |
953 | } |
954 | ||
16180334 MH |
955 | int ref_transaction_verify(struct ref_transaction *transaction, |
956 | const char *refname, | |
957 | const unsigned char *old_sha1, | |
958 | unsigned int flags, | |
959 | struct strbuf *err) | |
960 | { | |
961 | if (!old_sha1) | |
962 | die("BUG: verify called with old_sha1 set to NULL"); | |
963 | return ref_transaction_update(transaction, refname, | |
964 | NULL, old_sha1, | |
965 | flags, NULL, err); | |
966 | } | |
967 | ||
8f6dc7e3 | 968 | int update_ref_oid(const char *msg, const char *refname, |
969 | const struct object_id *new_oid, const struct object_id *old_oid, | |
970 | unsigned int flags, enum action_on_err onerr) | |
971 | { | |
972 | return update_ref(msg, refname, new_oid ? new_oid->hash : NULL, | |
973 | old_oid ? old_oid->hash : NULL, flags, onerr); | |
974 | } | |
975 | ||
c0fe4e8b NTND |
976 | int refs_update_ref(struct ref_store *refs, const char *msg, |
977 | const char *refname, const unsigned char *new_sha1, | |
978 | const unsigned char *old_sha1, unsigned int flags, | |
979 | enum action_on_err onerr) | |
4738a333 | 980 | { |
74ec19d4 | 981 | struct ref_transaction *t = NULL; |
b4d75ac1 | 982 | struct strbuf err = STRBUF_INIT; |
74ec19d4 | 983 | int ret = 0; |
b4d75ac1 | 984 | |
74ec19d4 | 985 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { |
c0fe4e8b | 986 | assert(refs == get_main_ref_store()); |
74ec19d4 DT |
987 | ret = write_pseudoref(refname, new_sha1, old_sha1, &err); |
988 | } else { | |
c0fe4e8b | 989 | t = ref_store_transaction_begin(refs, &err); |
74ec19d4 DT |
990 | if (!t || |
991 | ref_transaction_update(t, refname, new_sha1, old_sha1, | |
992 | flags, msg, &err) || | |
993 | ref_transaction_commit(t, &err)) { | |
994 | ret = 1; | |
995 | ref_transaction_free(t); | |
996 | } | |
997 | } | |
998 | if (ret) { | |
b4d75ac1 RS |
999 | const char *str = "update_ref failed for ref '%s': %s"; |
1000 | ||
b4d75ac1 RS |
1001 | switch (onerr) { |
1002 | case UPDATE_REFS_MSG_ON_ERR: | |
1003 | error(str, refname, err.buf); | |
1004 | break; | |
1005 | case UPDATE_REFS_DIE_ON_ERR: | |
1006 | die(str, refname, err.buf); | |
1007 | break; | |
1008 | case UPDATE_REFS_QUIET_ON_ERR: | |
1009 | break; | |
1010 | } | |
1011 | strbuf_release(&err); | |
4738a333 | 1012 | return 1; |
b4d75ac1 RS |
1013 | } |
1014 | strbuf_release(&err); | |
74ec19d4 DT |
1015 | if (t) |
1016 | ref_transaction_free(t); | |
b4d75ac1 | 1017 | return 0; |
4738a333 BK |
1018 | } |
1019 | ||
c0fe4e8b NTND |
1020 | int update_ref(const char *msg, const char *refname, |
1021 | const unsigned char *new_sha1, | |
1022 | const unsigned char *old_sha1, | |
1023 | unsigned int flags, enum action_on_err onerr) | |
1024 | { | |
1025 | return refs_update_ref(get_main_ref_store(), msg, refname, new_sha1, | |
1026 | old_sha1, flags, onerr); | |
1027 | } | |
1028 | ||
dfefa935 | 1029 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
1030 | { |
1031 | int i; | |
1032 | static char **scanf_fmts; | |
1033 | static int nr_rules; | |
1034 | char *short_name; | |
6cd4a898 | 1035 | struct strbuf resolved_buf = STRBUF_INIT; |
7c2b3029 | 1036 | |
7c2b3029 | 1037 | if (!nr_rules) { |
4346663a MH |
1038 | /* |
1039 | * Pre-generate scanf formats from ref_rev_parse_rules[]. | |
1040 | * Generate a format suitable for scanf from a | |
1041 | * ref_rev_parse_rules rule by interpolating "%s" at the | |
1042 | * location of the "%.*s". | |
1043 | */ | |
7c2b3029 | 1044 | size_t total_len = 0; |
84d5633f | 1045 | size_t offset = 0; |
7c2b3029 JK |
1046 | |
1047 | /* the rule list is NULL terminated, count them first */ | |
a4165851 | 1048 | for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++) |
7902fe03 MH |
1049 | /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */ |
1050 | total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1; | |
7c2b3029 | 1051 | |
50492f7b | 1052 | scanf_fmts = xmalloc(st_add(st_mult(sizeof(char *), nr_rules), total_len)); |
7c2b3029 | 1053 | |
84d5633f | 1054 | offset = 0; |
7c2b3029 | 1055 | for (i = 0; i < nr_rules; i++) { |
4346663a | 1056 | assert(offset < total_len); |
84d5633f | 1057 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset; |
4346663a MH |
1058 | offset += snprintf(scanf_fmts[i], total_len - offset, |
1059 | ref_rev_parse_rules[i], 2, "%s") + 1; | |
7c2b3029 JK |
1060 | } |
1061 | } | |
1062 | ||
1063 | /* bail out if there are no rules */ | |
1064 | if (!nr_rules) | |
dfefa935 | 1065 | return xstrdup(refname); |
7c2b3029 | 1066 | |
dfefa935 MH |
1067 | /* buffer for scanf result, at most refname must fit */ |
1068 | short_name = xstrdup(refname); | |
7c2b3029 JK |
1069 | |
1070 | /* skip first rule, it will always match */ | |
1071 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1072 | int j; | |
6e7b3309 | 1073 | int rules_to_fail = i; |
7c2b3029 JK |
1074 | int short_name_len; |
1075 | ||
dfefa935 | 1076 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
1077 | continue; |
1078 | ||
1079 | short_name_len = strlen(short_name); | |
1080 | ||
6e7b3309 BW |
1081 | /* |
1082 | * in strict mode, all (except the matched one) rules | |
1083 | * must fail to resolve to a valid non-ambiguous ref | |
1084 | */ | |
1085 | if (strict) | |
1086 | rules_to_fail = nr_rules; | |
1087 | ||
7c2b3029 JK |
1088 | /* |
1089 | * check if the short name resolves to a valid ref, | |
1090 | * but use only rules prior to the matched one | |
1091 | */ | |
6e7b3309 | 1092 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 1093 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 | 1094 | |
6e7b3309 BW |
1095 | /* skip matched rule */ |
1096 | if (i == j) | |
1097 | continue; | |
1098 | ||
7c2b3029 JK |
1099 | /* |
1100 | * the short name is ambiguous, if it resolves | |
1101 | * (with this previous rule) to a valid ref | |
1102 | * read_ref() returns 0 on success | |
1103 | */ | |
6cd4a898 JK |
1104 | strbuf_reset(&resolved_buf); |
1105 | strbuf_addf(&resolved_buf, rule, | |
1106 | short_name_len, short_name); | |
1107 | if (ref_exists(resolved_buf.buf)) | |
7c2b3029 JK |
1108 | break; |
1109 | } | |
1110 | ||
1111 | /* | |
1112 | * short name is non-ambiguous if all previous rules | |
1113 | * haven't resolved to a valid ref | |
1114 | */ | |
6cd4a898 JK |
1115 | if (j == rules_to_fail) { |
1116 | strbuf_release(&resolved_buf); | |
7c2b3029 | 1117 | return short_name; |
6cd4a898 | 1118 | } |
7c2b3029 JK |
1119 | } |
1120 | ||
6cd4a898 | 1121 | strbuf_release(&resolved_buf); |
7c2b3029 | 1122 | free(short_name); |
dfefa935 | 1123 | return xstrdup(refname); |
7c2b3029 | 1124 | } |
daebaa78 JH |
1125 | |
1126 | static struct string_list *hide_refs; | |
1127 | ||
1128 | int parse_hide_refs_config(const char *var, const char *value, const char *section) | |
1129 | { | |
ad8c7cda | 1130 | const char *key; |
daebaa78 | 1131 | if (!strcmp("transfer.hiderefs", var) || |
ad8c7cda JK |
1132 | (!parse_config_key(var, section, NULL, NULL, &key) && |
1133 | !strcmp(key, "hiderefs"))) { | |
daebaa78 JH |
1134 | char *ref; |
1135 | int len; | |
1136 | ||
1137 | if (!value) | |
1138 | return config_error_nonbool(var); | |
1139 | ref = xstrdup(value); | |
1140 | len = strlen(ref); | |
1141 | while (len && ref[len - 1] == '/') | |
1142 | ref[--len] = '\0'; | |
1143 | if (!hide_refs) { | |
1144 | hide_refs = xcalloc(1, sizeof(*hide_refs)); | |
1145 | hide_refs->strdup_strings = 1; | |
1146 | } | |
1147 | string_list_append(hide_refs, ref); | |
1148 | } | |
1149 | return 0; | |
1150 | } | |
1151 | ||
78a766ab | 1152 | int ref_is_hidden(const char *refname, const char *refname_full) |
daebaa78 | 1153 | { |
2bc31d16 | 1154 | int i; |
daebaa78 JH |
1155 | |
1156 | if (!hide_refs) | |
1157 | return 0; | |
2bc31d16 JK |
1158 | for (i = hide_refs->nr - 1; i >= 0; i--) { |
1159 | const char *match = hide_refs->items[i].string; | |
78a766ab | 1160 | const char *subject; |
2bc31d16 | 1161 | int neg = 0; |
daebaa78 | 1162 | int len; |
2bc31d16 JK |
1163 | |
1164 | if (*match == '!') { | |
1165 | neg = 1; | |
1166 | match++; | |
1167 | } | |
1168 | ||
78a766ab LF |
1169 | if (*match == '^') { |
1170 | subject = refname_full; | |
1171 | match++; | |
1172 | } else { | |
1173 | subject = refname; | |
1174 | } | |
1175 | ||
1176 | /* refname can be NULL when namespaces are used. */ | |
1177 | if (!subject || !starts_with(subject, match)) | |
daebaa78 | 1178 | continue; |
2bc31d16 | 1179 | len = strlen(match); |
78a766ab | 1180 | if (!subject[len] || subject[len] == '/') |
2bc31d16 | 1181 | return !neg; |
daebaa78 JH |
1182 | } |
1183 | return 0; | |
1184 | } | |
fa5b1830 | 1185 | |
0845122c DT |
1186 | const char *find_descendant_ref(const char *dirname, |
1187 | const struct string_list *extras, | |
1188 | const struct string_list *skip) | |
fa5b1830 | 1189 | { |
0845122c | 1190 | int pos; |
fa5b1830 | 1191 | |
0845122c DT |
1192 | if (!extras) |
1193 | return NULL; | |
fa5b1830 MH |
1194 | |
1195 | /* | |
0845122c DT |
1196 | * Look at the place where dirname would be inserted into |
1197 | * extras. If there is an entry at that position that starts | |
1198 | * with dirname (remember, dirname includes the trailing | |
1199 | * slash) and is not in skip, then we have a conflict. | |
fa5b1830 | 1200 | */ |
0845122c DT |
1201 | for (pos = string_list_find_insert_index(extras, dirname, 0); |
1202 | pos < extras->nr; pos++) { | |
1203 | const char *extra_refname = extras->items[pos].string; | |
fa5b1830 | 1204 | |
0845122c DT |
1205 | if (!starts_with(extra_refname, dirname)) |
1206 | break; | |
1207 | ||
1208 | if (!skip || !string_list_has_string(skip, extra_refname)) | |
1209 | return extra_refname; | |
fa5b1830 | 1210 | } |
0845122c DT |
1211 | return NULL; |
1212 | } | |
fa5b1830 | 1213 | |
7d2df051 NTND |
1214 | int refs_rename_ref_available(struct ref_store *refs, |
1215 | const char *old_refname, | |
1216 | const char *new_refname) | |
0845122c DT |
1217 | { |
1218 | struct string_list skip = STRING_LIST_INIT_NODUP; | |
1219 | struct strbuf err = STRBUF_INIT; | |
ff3a299c | 1220 | int ok; |
fa5b1830 | 1221 | |
ff3a299c | 1222 | string_list_insert(&skip, old_refname); |
7d2df051 NTND |
1223 | ok = !refs_verify_refname_available(refs, new_refname, |
1224 | NULL, &skip, &err); | |
ff3a299c | 1225 | if (!ok) |
0845122c DT |
1226 | error("%s", err.buf); |
1227 | ||
1228 | string_list_clear(&skip, 0); | |
1229 | strbuf_release(&err); | |
ff3a299c | 1230 | return ok; |
fa5b1830 | 1231 | } |
2bf68ed5 DT |
1232 | |
1233 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1234 | { | |
1235 | struct object_id oid; | |
1236 | int flag; | |
1237 | ||
1238 | if (submodule) { | |
1239 | if (resolve_gitlink_ref(submodule, "HEAD", oid.hash) == 0) | |
1240 | return fn("HEAD", &oid, 0, cb_data); | |
1241 | ||
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | if (!read_ref_full("HEAD", RESOLVE_REF_READING, oid.hash, &flag)) | |
1246 | return fn("HEAD", &oid, flag, cb_data); | |
1247 | ||
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | int head_ref(each_ref_fn fn, void *cb_data) | |
1252 | { | |
1253 | return head_ref_submodule(NULL, fn, cb_data); | |
1254 | } | |
93770590 | 1255 | |
e121b9cb MH |
1256 | struct ref_iterator *refs_ref_iterator_begin( |
1257 | struct ref_store *refs, | |
1258 | const char *prefix, int trim, int flags) | |
1259 | { | |
1260 | struct ref_iterator *iter; | |
1261 | ||
0a0865b8 MH |
1262 | if (ref_paranoia < 0) |
1263 | ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 0); | |
1264 | if (ref_paranoia) | |
1265 | flags |= DO_FOR_EACH_INCLUDE_BROKEN; | |
1266 | ||
e121b9cb | 1267 | iter = refs->be->iterator_begin(refs, prefix, flags); |
c7599718 MH |
1268 | |
1269 | /* | |
1270 | * `iterator_begin()` already takes care of prefix, but we | |
1271 | * might need to do some trimming: | |
1272 | */ | |
1273 | if (trim) | |
1274 | iter = prefix_ref_iterator_begin(iter, "", trim); | |
e121b9cb MH |
1275 | |
1276 | return iter; | |
1277 | } | |
1278 | ||
4c4de895 MH |
1279 | /* |
1280 | * Call fn for each reference in the specified submodule for which the | |
1281 | * refname begins with prefix. If trim is non-zero, then trim that | |
1282 | * many characters off the beginning of each refname before passing | |
1283 | * the refname to fn. flags can be DO_FOR_EACH_INCLUDE_BROKEN to | |
1284 | * include broken references in the iteration. If fn ever returns a | |
1285 | * non-zero value, stop the iteration and return that value; | |
1286 | * otherwise, return 0. | |
1287 | */ | |
7d2df051 | 1288 | static int do_for_each_ref(struct ref_store *refs, const char *prefix, |
4c4de895 MH |
1289 | each_ref_fn fn, int trim, int flags, void *cb_data) |
1290 | { | |
1291 | struct ref_iterator *iter; | |
1292 | ||
00eebe35 MH |
1293 | if (!refs) |
1294 | return 0; | |
1295 | ||
e121b9cb | 1296 | iter = refs_ref_iterator_begin(refs, prefix, trim, flags); |
4c4de895 MH |
1297 | |
1298 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1299 | } | |
1300 | ||
7d2df051 NTND |
1301 | int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
1302 | { | |
1303 | return do_for_each_ref(refs, "", fn, 0, 0, cb_data); | |
1304 | } | |
1305 | ||
93770590 DT |
1306 | int for_each_ref(each_ref_fn fn, void *cb_data) |
1307 | { | |
7d2df051 | 1308 | return refs_for_each_ref(get_main_ref_store(), fn, cb_data); |
93770590 DT |
1309 | } |
1310 | ||
1311 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1312 | { | |
7d2df051 NTND |
1313 | return refs_for_each_ref(get_submodule_ref_store(submodule), fn, cb_data); |
1314 | } | |
1315 | ||
1316 | int refs_for_each_ref_in(struct ref_store *refs, const char *prefix, | |
1317 | each_ref_fn fn, void *cb_data) | |
1318 | { | |
1319 | return do_for_each_ref(refs, prefix, fn, strlen(prefix), 0, cb_data); | |
93770590 DT |
1320 | } |
1321 | ||
1322 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) | |
1323 | { | |
7d2df051 | 1324 | return refs_for_each_ref_in(get_main_ref_store(), prefix, fn, cb_data); |
93770590 DT |
1325 | } |
1326 | ||
1327 | int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken) | |
1328 | { | |
1329 | unsigned int flag = 0; | |
1330 | ||
1331 | if (broken) | |
1332 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
7d2df051 NTND |
1333 | return do_for_each_ref(get_main_ref_store(), |
1334 | prefix, fn, 0, flag, cb_data); | |
93770590 DT |
1335 | } |
1336 | ||
1337 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, | |
7d2df051 | 1338 | each_ref_fn fn, void *cb_data) |
93770590 | 1339 | { |
7d2df051 NTND |
1340 | return refs_for_each_ref_in(get_submodule_ref_store(submodule), |
1341 | prefix, fn, cb_data); | |
93770590 DT |
1342 | } |
1343 | ||
1344 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) | |
1345 | { | |
7d2df051 NTND |
1346 | return do_for_each_ref(get_main_ref_store(), |
1347 | git_replace_ref_base, fn, | |
1348 | strlen(git_replace_ref_base), | |
1349 | 0, cb_data); | |
93770590 DT |
1350 | } |
1351 | ||
1352 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
1353 | { | |
1354 | struct strbuf buf = STRBUF_INIT; | |
1355 | int ret; | |
1356 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
7d2df051 NTND |
1357 | ret = do_for_each_ref(get_main_ref_store(), |
1358 | buf.buf, fn, 0, 0, cb_data); | |
93770590 DT |
1359 | strbuf_release(&buf); |
1360 | return ret; | |
1361 | } | |
1362 | ||
7d2df051 | 1363 | int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
93770590 | 1364 | { |
7d2df051 | 1365 | return do_for_each_ref(refs, "", fn, 0, |
93770590 DT |
1366 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); |
1367 | } | |
2d0663b2 | 1368 | |
7d2df051 NTND |
1369 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
1370 | { | |
1371 | return refs_for_each_rawref(get_main_ref_store(), fn, cb_data); | |
1372 | } | |
1373 | ||
470be518 MH |
1374 | int refs_read_raw_ref(struct ref_store *ref_store, |
1375 | const char *refname, unsigned char *sha1, | |
1376 | struct strbuf *referent, unsigned int *type) | |
1377 | { | |
1378 | return ref_store->be->read_raw_ref(ref_store, refname, sha1, referent, type); | |
1379 | } | |
1380 | ||
2d0663b2 | 1381 | /* This function needs to return a meaningful errno on failure */ |
7d2df051 | 1382 | const char *refs_resolve_ref_unsafe(struct ref_store *refs, |
3c0cb0cb MH |
1383 | const char *refname, |
1384 | int resolve_flags, | |
1385 | unsigned char *sha1, int *flags) | |
2d0663b2 DT |
1386 | { |
1387 | static struct strbuf sb_refname = STRBUF_INIT; | |
1388 | int unused_flags; | |
1389 | int symref_count; | |
1390 | ||
1391 | if (!flags) | |
1392 | flags = &unused_flags; | |
1393 | ||
1394 | *flags = 0; | |
1395 | ||
1396 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1397 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1398 | !refname_is_safe(refname)) { | |
1399 | errno = EINVAL; | |
1400 | return NULL; | |
1401 | } | |
1402 | ||
1403 | /* | |
1404 | * dwim_ref() uses REF_ISBROKEN to distinguish between | |
1405 | * missing refs and refs that were present but invalid, | |
1406 | * to complain about the latter to stderr. | |
1407 | * | |
1408 | * We don't know whether the ref exists, so don't set | |
1409 | * REF_ISBROKEN yet. | |
1410 | */ | |
1411 | *flags |= REF_BAD_NAME; | |
1412 | } | |
1413 | ||
1414 | for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) { | |
1415 | unsigned int read_flags = 0; | |
1416 | ||
470be518 MH |
1417 | if (refs_read_raw_ref(refs, refname, |
1418 | sha1, &sb_refname, &read_flags)) { | |
2d0663b2 DT |
1419 | *flags |= read_flags; |
1420 | if (errno != ENOENT || (resolve_flags & RESOLVE_REF_READING)) | |
1421 | return NULL; | |
1422 | hashclr(sha1); | |
1423 | if (*flags & REF_BAD_NAME) | |
1424 | *flags |= REF_ISBROKEN; | |
1425 | return refname; | |
1426 | } | |
1427 | ||
1428 | *flags |= read_flags; | |
1429 | ||
1430 | if (!(read_flags & REF_ISSYMREF)) { | |
1431 | if (*flags & REF_BAD_NAME) { | |
1432 | hashclr(sha1); | |
1433 | *flags |= REF_ISBROKEN; | |
1434 | } | |
1435 | return refname; | |
1436 | } | |
1437 | ||
1438 | refname = sb_refname.buf; | |
1439 | if (resolve_flags & RESOLVE_REF_NO_RECURSE) { | |
1440 | hashclr(sha1); | |
1441 | return refname; | |
1442 | } | |
1443 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1444 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1445 | !refname_is_safe(refname)) { | |
1446 | errno = EINVAL; | |
1447 | return NULL; | |
1448 | } | |
1449 | ||
1450 | *flags |= REF_ISBROKEN | REF_BAD_NAME; | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | errno = ELOOP; | |
1455 | return NULL; | |
1456 | } | |
00eebe35 | 1457 | |
6fb5acfd DT |
1458 | /* backend functions */ |
1459 | int refs_init_db(struct strbuf *err) | |
1460 | { | |
077be78d | 1461 | struct ref_store *refs = get_main_ref_store(); |
6fb5acfd DT |
1462 | |
1463 | return refs->be->init_db(refs, err); | |
1464 | } | |
1465 | ||
bd40dcda MH |
1466 | const char *resolve_ref_unsafe(const char *refname, int resolve_flags, |
1467 | unsigned char *sha1, int *flags) | |
1468 | { | |
7d2df051 | 1469 | return refs_resolve_ref_unsafe(get_main_ref_store(), refname, |
bd40dcda MH |
1470 | resolve_flags, sha1, flags); |
1471 | } | |
1472 | ||
a8355bb7 MH |
1473 | int resolve_gitlink_ref(const char *submodule, const char *refname, |
1474 | unsigned char *sha1) | |
424dcc76 | 1475 | { |
a8355bb7 | 1476 | size_t len = strlen(submodule); |
424dcc76 MH |
1477 | struct ref_store *refs; |
1478 | int flags; | |
1479 | ||
a8355bb7 | 1480 | while (len && submodule[len - 1] == '/') |
424dcc76 | 1481 | len--; |
48a8475f | 1482 | |
424dcc76 MH |
1483 | if (!len) |
1484 | return -1; | |
1485 | ||
a8355bb7 | 1486 | if (submodule[len]) { |
48a8475f | 1487 | /* We need to strip off one or more trailing slashes */ |
a8355bb7 | 1488 | char *stripped = xmemdupz(submodule, len); |
48a8475f | 1489 | |
18d0002d | 1490 | refs = get_submodule_ref_store(stripped); |
48a8475f MH |
1491 | free(stripped); |
1492 | } else { | |
18d0002d | 1493 | refs = get_submodule_ref_store(submodule); |
48a8475f MH |
1494 | } |
1495 | ||
424dcc76 MH |
1496 | if (!refs) |
1497 | return -1; | |
1498 | ||
7d2df051 | 1499 | if (!refs_resolve_ref_unsafe(refs, refname, 0, sha1, &flags) || |
424dcc76 MH |
1500 | is_null_sha1(sha1)) |
1501 | return -1; | |
1502 | return 0; | |
1503 | } | |
1504 | ||
0c064d90 | 1505 | struct ref_store_hash_entry |
7d4558c4 MH |
1506 | { |
1507 | struct hashmap_entry ent; /* must be the first member! */ | |
1508 | ||
1509 | struct ref_store *refs; | |
1510 | ||
0c064d90 NTND |
1511 | /* NUL-terminated identifier of the ref store: */ |
1512 | char name[FLEX_ARRAY]; | |
7d4558c4 MH |
1513 | }; |
1514 | ||
0c064d90 | 1515 | static int ref_store_hash_cmp(const void *entry, const void *entry_or_key, |
7d4558c4 MH |
1516 | const void *keydata) |
1517 | { | |
0c064d90 NTND |
1518 | const struct ref_store_hash_entry *e1 = entry, *e2 = entry_or_key; |
1519 | const char *name = keydata ? keydata : e2->name; | |
7d4558c4 | 1520 | |
0c064d90 | 1521 | return strcmp(e1->name, name); |
7d4558c4 MH |
1522 | } |
1523 | ||
0c064d90 NTND |
1524 | static struct ref_store_hash_entry *alloc_ref_store_hash_entry( |
1525 | const char *name, struct ref_store *refs) | |
7d4558c4 | 1526 | { |
0c064d90 | 1527 | struct ref_store_hash_entry *entry; |
7d4558c4 | 1528 | |
0c064d90 NTND |
1529 | FLEX_ALLOC_STR(entry, name, name); |
1530 | hashmap_entry_init(entry, strhash(name)); | |
7d4558c4 MH |
1531 | entry->refs = refs; |
1532 | return entry; | |
1533 | } | |
1534 | ||
00eebe35 MH |
1535 | /* A pointer to the ref_store for the main repository: */ |
1536 | static struct ref_store *main_ref_store; | |
1537 | ||
7d4558c4 MH |
1538 | /* A hashmap of ref_stores, stored by submodule name: */ |
1539 | static struct hashmap submodule_ref_stores; | |
00eebe35 | 1540 | |
17eff96b NTND |
1541 | /* A hashmap of ref_stores, stored by worktree id: */ |
1542 | static struct hashmap worktree_ref_stores; | |
1543 | ||
c468da4e | 1544 | /* |
0c064d90 NTND |
1545 | * Look up a ref store by name. If that ref_store hasn't been |
1546 | * registered yet, return NULL. | |
c468da4e | 1547 | */ |
0c064d90 NTND |
1548 | static struct ref_store *lookup_ref_store_map(struct hashmap *map, |
1549 | const char *name) | |
00eebe35 | 1550 | { |
0c064d90 | 1551 | struct ref_store_hash_entry *entry; |
00eebe35 | 1552 | |
0c064d90 | 1553 | if (!map->tablesize) |
7d4558c4 MH |
1554 | /* It's initialized on demand in register_ref_store(). */ |
1555 | return NULL; | |
620a66b9 | 1556 | |
0c064d90 | 1557 | entry = hashmap_get_from_hash(map, strhash(name), name); |
7d4558c4 | 1558 | return entry ? entry->refs : NULL; |
00eebe35 MH |
1559 | } |
1560 | ||
c468da4e MH |
1561 | /* |
1562 | * Create, record, and return a ref_store instance for the specified | |
5d0bc90e | 1563 | * gitdir. |
c468da4e | 1564 | */ |
9e7ec634 NTND |
1565 | static struct ref_store *ref_store_init(const char *gitdir, |
1566 | unsigned int flags) | |
00eebe35 MH |
1567 | { |
1568 | const char *be_name = "files"; | |
1569 | struct ref_storage_be *be = find_ref_storage_backend(be_name); | |
ba88add5 | 1570 | struct ref_store *refs; |
00eebe35 MH |
1571 | |
1572 | if (!be) | |
1573 | die("BUG: reference backend %s is unknown", be_name); | |
1574 | ||
9e7ec634 | 1575 | refs = be->init(gitdir, flags); |
ba88add5 | 1576 | return refs; |
00eebe35 MH |
1577 | } |
1578 | ||
077be78d | 1579 | struct ref_store *get_main_ref_store(void) |
24c8407e NTND |
1580 | { |
1581 | if (main_ref_store) | |
1582 | return main_ref_store; | |
1583 | ||
0d8a814d | 1584 | main_ref_store = ref_store_init(get_git_dir(), REF_STORE_ALL_CAPS); |
378dc910 NTND |
1585 | return main_ref_store; |
1586 | } | |
1587 | ||
1588 | /* | |
0c064d90 NTND |
1589 | * Associate a ref store with a name. It is a fatal error to call this |
1590 | * function twice for the same name. | |
378dc910 | 1591 | */ |
0c064d90 NTND |
1592 | static void register_ref_store_map(struct hashmap *map, |
1593 | const char *type, | |
1594 | struct ref_store *refs, | |
1595 | const char *name) | |
378dc910 | 1596 | { |
0c064d90 NTND |
1597 | if (!map->tablesize) |
1598 | hashmap_init(map, ref_store_hash_cmp, 0); | |
378dc910 | 1599 | |
0c064d90 NTND |
1600 | if (hashmap_put(map, alloc_ref_store_hash_entry(name, refs))) |
1601 | die("BUG: %s ref_store '%s' initialized twice", type, name); | |
24c8407e NTND |
1602 | } |
1603 | ||
18d0002d | 1604 | struct ref_store *get_submodule_ref_store(const char *submodule) |
00eebe35 | 1605 | { |
126c9e05 | 1606 | struct strbuf submodule_sb = STRBUF_INIT; |
00eebe35 | 1607 | struct ref_store *refs; |
126c9e05 | 1608 | int ret; |
00eebe35 MH |
1609 | |
1610 | if (!submodule || !*submodule) { | |
18d0002d NTND |
1611 | /* |
1612 | * FIXME: This case is ideally not allowed. But that | |
1613 | * can't happen until we clean up all the callers. | |
1614 | */ | |
24c8407e | 1615 | return get_main_ref_store(); |
126c9e05 | 1616 | } |
00eebe35 | 1617 | |
0c064d90 | 1618 | refs = lookup_ref_store_map(&submodule_ref_stores, submodule); |
126c9e05 NTND |
1619 | if (refs) |
1620 | return refs; | |
00eebe35 | 1621 | |
126c9e05 NTND |
1622 | strbuf_addstr(&submodule_sb, submodule); |
1623 | ret = is_nonbare_repository_dir(&submodule_sb); | |
1624 | strbuf_release(&submodule_sb); | |
1625 | if (!ret) | |
1626 | return NULL; | |
00eebe35 | 1627 | |
5d0bc90e NTND |
1628 | ret = submodule_to_gitdir(&submodule_sb, submodule); |
1629 | if (ret) { | |
1630 | strbuf_release(&submodule_sb); | |
1631 | return NULL; | |
00eebe35 MH |
1632 | } |
1633 | ||
9e7ec634 NTND |
1634 | /* assume that add_submodule_odb() has been called */ |
1635 | refs = ref_store_init(submodule_sb.buf, | |
1636 | REF_STORE_READ | REF_STORE_ODB); | |
0c064d90 NTND |
1637 | register_ref_store_map(&submodule_ref_stores, "submodule", |
1638 | refs, submodule); | |
5d0bc90e NTND |
1639 | |
1640 | strbuf_release(&submodule_sb); | |
00eebe35 MH |
1641 | return refs; |
1642 | } | |
1643 | ||
17eff96b NTND |
1644 | struct ref_store *get_worktree_ref_store(const struct worktree *wt) |
1645 | { | |
1646 | struct ref_store *refs; | |
1647 | const char *id; | |
1648 | ||
1649 | if (wt->is_current) | |
1650 | return get_main_ref_store(); | |
1651 | ||
1652 | id = wt->id ? wt->id : "/"; | |
1653 | refs = lookup_ref_store_map(&worktree_ref_stores, id); | |
1654 | if (refs) | |
1655 | return refs; | |
1656 | ||
1657 | if (wt->id) | |
1658 | refs = ref_store_init(git_common_path("worktrees/%s", wt->id), | |
1659 | REF_STORE_ALL_CAPS); | |
1660 | else | |
1661 | refs = ref_store_init(get_git_common_dir(), | |
1662 | REF_STORE_ALL_CAPS); | |
1663 | ||
1664 | if (refs) | |
1665 | register_ref_store_map(&worktree_ref_stores, "worktree", | |
1666 | refs, id); | |
1667 | return refs; | |
1668 | } | |
1669 | ||
620a66b9 | 1670 | void base_ref_store_init(struct ref_store *refs, |
fbfd0a29 | 1671 | const struct ref_storage_be *be) |
00eebe35 | 1672 | { |
620a66b9 | 1673 | refs->be = be; |
00eebe35 | 1674 | } |
127b42a1 RS |
1675 | |
1676 | /* backend functions */ | |
7d2df051 | 1677 | int refs_pack_refs(struct ref_store *refs, unsigned int flags) |
8231527e | 1678 | { |
8231527e MH |
1679 | return refs->be->pack_refs(refs, flags); |
1680 | } | |
1681 | ||
7d2df051 NTND |
1682 | int refs_peel_ref(struct ref_store *refs, const char *refname, |
1683 | unsigned char *sha1) | |
1684 | { | |
1685 | return refs->be->peel_ref(refs, refname, sha1); | |
8231527e MH |
1686 | } |
1687 | ||
bd427cf2 MH |
1688 | int peel_ref(const char *refname, unsigned char *sha1) |
1689 | { | |
7d2df051 NTND |
1690 | return refs_peel_ref(get_main_ref_store(), refname, sha1); |
1691 | } | |
bd427cf2 | 1692 | |
7d2df051 NTND |
1693 | int refs_create_symref(struct ref_store *refs, |
1694 | const char *ref_target, | |
1695 | const char *refs_heads_master, | |
1696 | const char *logmsg) | |
1697 | { | |
1698 | return refs->be->create_symref(refs, ref_target, | |
1699 | refs_heads_master, | |
1700 | logmsg); | |
bd427cf2 MH |
1701 | } |
1702 | ||
284689ba MH |
1703 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1704 | const char *logmsg) | |
1705 | { | |
7d2df051 NTND |
1706 | return refs_create_symref(get_main_ref_store(), ref_target, |
1707 | refs_heads_master, logmsg); | |
284689ba MH |
1708 | } |
1709 | ||
2ced105c MH |
1710 | int ref_update_reject_duplicates(struct string_list *refnames, |
1711 | struct strbuf *err) | |
1712 | { | |
a552e50e | 1713 | size_t i, n = refnames->nr; |
2ced105c MH |
1714 | |
1715 | assert(err); | |
1716 | ||
8556f8d6 MH |
1717 | for (i = 1; i < n; i++) { |
1718 | int cmp = strcmp(refnames->items[i - 1].string, | |
1719 | refnames->items[i].string); | |
1720 | ||
1721 | if (!cmp) { | |
2ced105c MH |
1722 | strbuf_addf(err, |
1723 | "multiple updates for ref '%s' not allowed.", | |
1724 | refnames->items[i].string); | |
1725 | return 1; | |
8556f8d6 MH |
1726 | } else if (cmp > 0) { |
1727 | die("BUG: ref_update_reject_duplicates() received unsorted list"); | |
2ced105c | 1728 | } |
8556f8d6 | 1729 | } |
2ced105c MH |
1730 | return 0; |
1731 | } | |
1732 | ||
30173b88 MH |
1733 | int ref_transaction_prepare(struct ref_transaction *transaction, |
1734 | struct strbuf *err) | |
127b42a1 | 1735 | { |
c0fe4e8b | 1736 | struct ref_store *refs = transaction->ref_store; |
127b42a1 | 1737 | |
8d4240d3 MH |
1738 | switch (transaction->state) { |
1739 | case REF_TRANSACTION_OPEN: | |
1740 | /* Good. */ | |
1741 | break; | |
30173b88 MH |
1742 | case REF_TRANSACTION_PREPARED: |
1743 | die("BUG: prepare called twice on reference transaction"); | |
1744 | break; | |
8d4240d3 MH |
1745 | case REF_TRANSACTION_CLOSED: |
1746 | die("BUG: prepare called on a closed reference transaction"); | |
1747 | break; | |
1748 | default: | |
1749 | die("BUG: unexpected reference transaction state"); | |
1750 | break; | |
1751 | } | |
1752 | ||
d8f4481c JK |
1753 | if (getenv(GIT_QUARANTINE_ENVIRONMENT)) { |
1754 | strbuf_addstr(err, | |
1755 | _("ref updates forbidden inside quarantine environment")); | |
1756 | return -1; | |
1757 | } | |
1758 | ||
30173b88 MH |
1759 | return refs->be->transaction_prepare(refs, transaction, err); |
1760 | } | |
1761 | ||
1762 | int ref_transaction_abort(struct ref_transaction *transaction, | |
1763 | struct strbuf *err) | |
1764 | { | |
1765 | struct ref_store *refs = transaction->ref_store; | |
1766 | int ret = 0; | |
1767 | ||
1768 | switch (transaction->state) { | |
1769 | case REF_TRANSACTION_OPEN: | |
1770 | /* No need to abort explicitly. */ | |
1771 | break; | |
1772 | case REF_TRANSACTION_PREPARED: | |
1773 | ret = refs->be->transaction_abort(refs, transaction, err); | |
1774 | break; | |
1775 | case REF_TRANSACTION_CLOSED: | |
1776 | die("BUG: abort called on a closed reference transaction"); | |
1777 | break; | |
1778 | default: | |
1779 | die("BUG: unexpected reference transaction state"); | |
1780 | break; | |
1781 | } | |
1782 | ||
1783 | ref_transaction_free(transaction); | |
1784 | return ret; | |
1785 | } | |
1786 | ||
1787 | int ref_transaction_commit(struct ref_transaction *transaction, | |
1788 | struct strbuf *err) | |
1789 | { | |
1790 | struct ref_store *refs = transaction->ref_store; | |
1791 | int ret; | |
1792 | ||
1793 | switch (transaction->state) { | |
1794 | case REF_TRANSACTION_OPEN: | |
1795 | /* Need to prepare first. */ | |
1796 | ret = ref_transaction_prepare(transaction, err); | |
1797 | if (ret) | |
1798 | return ret; | |
1799 | break; | |
1800 | case REF_TRANSACTION_PREPARED: | |
1801 | /* Fall through to finish. */ | |
1802 | break; | |
1803 | case REF_TRANSACTION_CLOSED: | |
1804 | die("BUG: commit called on a closed reference transaction"); | |
1805 | break; | |
1806 | default: | |
1807 | die("BUG: unexpected reference transaction state"); | |
1808 | break; | |
1809 | } | |
1810 | ||
1811 | return refs->be->transaction_finish(refs, transaction, err); | |
127b42a1 | 1812 | } |
62665823 | 1813 | |
7d2df051 NTND |
1814 | int refs_verify_refname_available(struct ref_store *refs, |
1815 | const char *refname, | |
b05855b5 | 1816 | const struct string_list *extras, |
7d2df051 NTND |
1817 | const struct string_list *skip, |
1818 | struct strbuf *err) | |
62665823 | 1819 | { |
b05855b5 MH |
1820 | const char *slash; |
1821 | const char *extra_refname; | |
1822 | struct strbuf dirname = STRBUF_INIT; | |
1823 | struct strbuf referent = STRBUF_INIT; | |
1824 | struct object_id oid; | |
1825 | unsigned int type; | |
1826 | struct ref_iterator *iter; | |
1827 | int ok; | |
1828 | int ret = -1; | |
1829 | ||
1830 | /* | |
1831 | * For the sake of comments in this function, suppose that | |
1832 | * refname is "refs/foo/bar". | |
1833 | */ | |
1834 | ||
1835 | assert(err); | |
1836 | ||
1837 | strbuf_grow(&dirname, strlen(refname) + 1); | |
1838 | for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) { | |
1839 | /* Expand dirname to the new prefix, not including the trailing slash: */ | |
1840 | strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len); | |
1841 | ||
1842 | /* | |
1843 | * We are still at a leading dir of the refname (e.g., | |
1844 | * "refs/foo"; if there is a reference with that name, | |
1845 | * it is a conflict, *unless* it is in skip. | |
1846 | */ | |
1847 | if (skip && string_list_has_string(skip, dirname.buf)) | |
1848 | continue; | |
1849 | ||
1850 | if (!refs_read_raw_ref(refs, dirname.buf, oid.hash, &referent, &type)) { | |
1851 | strbuf_addf(err, "'%s' exists; cannot create '%s'", | |
1852 | dirname.buf, refname); | |
1853 | goto cleanup; | |
1854 | } | |
1855 | ||
1856 | if (extras && string_list_has_string(extras, dirname.buf)) { | |
1857 | strbuf_addf(err, "cannot process '%s' and '%s' at the same time", | |
1858 | refname, dirname.buf); | |
1859 | goto cleanup; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | /* | |
1864 | * We are at the leaf of our refname (e.g., "refs/foo/bar"). | |
1865 | * There is no point in searching for a reference with that | |
1866 | * name, because a refname isn't considered to conflict with | |
1867 | * itself. But we still need to check for references whose | |
1868 | * names are in the "refs/foo/bar/" namespace, because they | |
1869 | * *do* conflict. | |
1870 | */ | |
1871 | strbuf_addstr(&dirname, refname + dirname.len); | |
1872 | strbuf_addch(&dirname, '/'); | |
1873 | ||
1874 | iter = refs_ref_iterator_begin(refs, dirname.buf, 0, | |
1875 | DO_FOR_EACH_INCLUDE_BROKEN); | |
1876 | while ((ok = ref_iterator_advance(iter)) == ITER_OK) { | |
1877 | if (skip && | |
1878 | string_list_has_string(skip, iter->refname)) | |
1879 | continue; | |
1880 | ||
1881 | strbuf_addf(err, "'%s' exists; cannot create '%s'", | |
1882 | iter->refname, refname); | |
1883 | ref_iterator_abort(iter); | |
1884 | goto cleanup; | |
1885 | } | |
1886 | ||
1887 | if (ok != ITER_DONE) | |
1888 | die("BUG: error while iterating over references"); | |
1889 | ||
1890 | extra_refname = find_descendant_ref(dirname.buf, extras, skip); | |
1891 | if (extra_refname) | |
1892 | strbuf_addf(err, "cannot process '%s' and '%s' at the same time", | |
1893 | refname, extra_refname); | |
1894 | else | |
1895 | ret = 0; | |
1896 | ||
1897 | cleanup: | |
1898 | strbuf_release(&referent); | |
1899 | strbuf_release(&dirname); | |
1900 | return ret; | |
62665823 | 1901 | } |
e3688bd6 | 1902 | |
7d2df051 | 1903 | int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
e3688bd6 | 1904 | { |
e3688bd6 DT |
1905 | struct ref_iterator *iter; |
1906 | ||
1907 | iter = refs->be->reflog_iterator_begin(refs); | |
1908 | ||
1909 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1910 | } | |
1911 | ||
7d2df051 | 1912 | int for_each_reflog(each_ref_fn fn, void *cb_data) |
e3688bd6 | 1913 | { |
7d2df051 NTND |
1914 | return refs_for_each_reflog(get_main_ref_store(), fn, cb_data); |
1915 | } | |
e3688bd6 | 1916 | |
7d2df051 NTND |
1917 | int refs_for_each_reflog_ent_reverse(struct ref_store *refs, |
1918 | const char *refname, | |
1919 | each_reflog_ent_fn fn, | |
1920 | void *cb_data) | |
1921 | { | |
e3688bd6 DT |
1922 | return refs->be->for_each_reflog_ent_reverse(refs, refname, |
1923 | fn, cb_data); | |
1924 | } | |
1925 | ||
7d2df051 NTND |
1926 | int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, |
1927 | void *cb_data) | |
1928 | { | |
1929 | return refs_for_each_reflog_ent_reverse(get_main_ref_store(), | |
1930 | refname, fn, cb_data); | |
1931 | } | |
1932 | ||
1933 | int refs_for_each_reflog_ent(struct ref_store *refs, const char *refname, | |
1934 | each_reflog_ent_fn fn, void *cb_data) | |
1935 | { | |
1936 | return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data); | |
1937 | } | |
1938 | ||
e3688bd6 DT |
1939 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, |
1940 | void *cb_data) | |
1941 | { | |
7d2df051 NTND |
1942 | return refs_for_each_reflog_ent(get_main_ref_store(), refname, |
1943 | fn, cb_data); | |
1944 | } | |
e3688bd6 | 1945 | |
7d2df051 NTND |
1946 | int refs_reflog_exists(struct ref_store *refs, const char *refname) |
1947 | { | |
1948 | return refs->be->reflog_exists(refs, refname); | |
e3688bd6 DT |
1949 | } |
1950 | ||
1951 | int reflog_exists(const char *refname) | |
1952 | { | |
7d2df051 NTND |
1953 | return refs_reflog_exists(get_main_ref_store(), refname); |
1954 | } | |
e3688bd6 | 1955 | |
7d2df051 NTND |
1956 | int refs_create_reflog(struct ref_store *refs, const char *refname, |
1957 | int force_create, struct strbuf *err) | |
1958 | { | |
1959 | return refs->be->create_reflog(refs, refname, force_create, err); | |
e3688bd6 DT |
1960 | } |
1961 | ||
1962 | int safe_create_reflog(const char *refname, int force_create, | |
1963 | struct strbuf *err) | |
1964 | { | |
7d2df051 NTND |
1965 | return refs_create_reflog(get_main_ref_store(), refname, |
1966 | force_create, err); | |
1967 | } | |
e3688bd6 | 1968 | |
7d2df051 NTND |
1969 | int refs_delete_reflog(struct ref_store *refs, const char *refname) |
1970 | { | |
1971 | return refs->be->delete_reflog(refs, refname); | |
e3688bd6 DT |
1972 | } |
1973 | ||
1974 | int delete_reflog(const char *refname) | |
1975 | { | |
7d2df051 NTND |
1976 | return refs_delete_reflog(get_main_ref_store(), refname); |
1977 | } | |
e3688bd6 | 1978 | |
7d2df051 NTND |
1979 | int refs_reflog_expire(struct ref_store *refs, |
1980 | const char *refname, const unsigned char *sha1, | |
1981 | unsigned int flags, | |
1982 | reflog_expiry_prepare_fn prepare_fn, | |
1983 | reflog_expiry_should_prune_fn should_prune_fn, | |
1984 | reflog_expiry_cleanup_fn cleanup_fn, | |
1985 | void *policy_cb_data) | |
1986 | { | |
1987 | return refs->be->reflog_expire(refs, refname, sha1, flags, | |
1988 | prepare_fn, should_prune_fn, | |
1989 | cleanup_fn, policy_cb_data); | |
e3688bd6 DT |
1990 | } |
1991 | ||
1992 | int reflog_expire(const char *refname, const unsigned char *sha1, | |
1993 | unsigned int flags, | |
1994 | reflog_expiry_prepare_fn prepare_fn, | |
1995 | reflog_expiry_should_prune_fn should_prune_fn, | |
1996 | reflog_expiry_cleanup_fn cleanup_fn, | |
1997 | void *policy_cb_data) | |
1998 | { | |
7d2df051 NTND |
1999 | return refs_reflog_expire(get_main_ref_store(), |
2000 | refname, sha1, flags, | |
2001 | prepare_fn, should_prune_fn, | |
2002 | cleanup_fn, policy_cb_data); | |
e3688bd6 | 2003 | } |
fc681463 DT |
2004 | |
2005 | int initial_ref_transaction_commit(struct ref_transaction *transaction, | |
2006 | struct strbuf *err) | |
2007 | { | |
c0fe4e8b | 2008 | struct ref_store *refs = transaction->ref_store; |
fc681463 DT |
2009 | |
2010 | return refs->be->initial_transaction_commit(refs, transaction, err); | |
2011 | } | |
a27dcf89 | 2012 | |
64da4199 MH |
2013 | int refs_delete_refs(struct ref_store *refs, const char *msg, |
2014 | struct string_list *refnames, unsigned int flags) | |
a27dcf89 | 2015 | { |
64da4199 | 2016 | return refs->be->delete_refs(refs, msg, refnames, flags); |
a27dcf89 | 2017 | } |
9b6b40d9 | 2018 | |
64da4199 MH |
2019 | int delete_refs(const char *msg, struct string_list *refnames, |
2020 | unsigned int flags) | |
9b6b40d9 | 2021 | { |
64da4199 | 2022 | return refs_delete_refs(get_main_ref_store(), msg, refnames, flags); |
7d2df051 | 2023 | } |
9b6b40d9 | 2024 | |
7d2df051 NTND |
2025 | int refs_rename_ref(struct ref_store *refs, const char *oldref, |
2026 | const char *newref, const char *logmsg) | |
2027 | { | |
9b6b40d9 DT |
2028 | return refs->be->rename_ref(refs, oldref, newref, logmsg); |
2029 | } | |
7d2df051 NTND |
2030 | |
2031 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) | |
2032 | { | |
2033 | return refs_rename_ref(get_main_ref_store(), oldref, newref, logmsg); | |
2034 | } |