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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" |
85023577 | 8 | #include "refs.h" |
4cb77009 | 9 | #include "refs/refs-internal.h" |
cf0adba7 JH |
10 | #include "object.h" |
11 | #include "tag.h" | |
5d0bc90e | 12 | #include "submodule.h" |
3581d793 | 13 | |
3dce444f RS |
14 | /* |
15 | * List of all available backends | |
16 | */ | |
17 | static struct ref_storage_be *refs_backends = &refs_be_files; | |
18 | ||
19 | static struct ref_storage_be *find_ref_storage_backend(const char *name) | |
20 | { | |
21 | struct ref_storage_be *be; | |
22 | for (be = refs_backends; be; be = be->next) | |
23 | if (!strcmp(be->name, name)) | |
24 | return be; | |
25 | return NULL; | |
26 | } | |
27 | ||
28 | int ref_storage_backend_exists(const char *name) | |
29 | { | |
30 | return find_ref_storage_backend(name) != NULL; | |
31 | } | |
32 | ||
bc5fd6d3 | 33 | /* |
dde8a902 DT |
34 | * How to handle various characters in refnames: |
35 | * 0: An acceptable character for refs | |
5e650228 JH |
36 | * 1: End-of-component |
37 | * 2: ., look for a preceding . to reject .. in refs | |
38 | * 3: {, look for a preceding @ to reject @{ in refs | |
53a8555e | 39 | * 4: A bad character: ASCII control characters, and |
cd377f45 JK |
40 | * ":", "?", "[", "\", "^", "~", SP, or TAB |
41 | * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set | |
dde8a902 DT |
42 | */ |
43 | static unsigned char refname_disposition[256] = { | |
5e650228 JH |
44 | 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
45 | 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
cd377f45 | 46 | 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1, |
5e650228 | 47 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4, |
dde8a902 | 48 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
5e650228 JH |
49 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0, |
50 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
51 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4 | |
dde8a902 DT |
52 | }; |
53 | ||
54 | /* | |
55 | * Try to read one refname component from the front of refname. | |
56 | * Return the length of the component found, or -1 if the component is | |
57 | * not legal. It is legal if it is something reasonable to have under | |
58 | * ".git/refs/"; We do not like it if: | |
bc5fd6d3 MH |
59 | * |
60 | * - any path component of it begins with ".", or | |
61 | * - it has double dots "..", or | |
53a8555e | 62 | * - it has ASCII control characters, or |
cd377f45 JK |
63 | * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or |
64 | * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or | |
53a8555e JK |
65 | * - it ends with a "/", or |
66 | * - it ends with ".lock", or | |
67 | * - it contains a "@{" portion | |
bc5fd6d3 | 68 | */ |
cd377f45 | 69 | static int check_refname_component(const char *refname, int *flags) |
bc5fd6d3 MH |
70 | { |
71 | const char *cp; | |
72 | char last = '\0'; | |
73 | ||
74 | for (cp = refname; ; cp++) { | |
dde8a902 DT |
75 | int ch = *cp & 255; |
76 | unsigned char disp = refname_disposition[ch]; | |
77 | switch (disp) { | |
5e650228 | 78 | case 1: |
dde8a902 | 79 | goto out; |
5e650228 | 80 | case 2: |
dde8a902 DT |
81 | if (last == '.') |
82 | return -1; /* Refname contains "..". */ | |
83 | break; | |
5e650228 | 84 | case 3: |
dde8a902 DT |
85 | if (last == '@') |
86 | return -1; /* Refname contains "@{". */ | |
bc5fd6d3 | 87 | break; |
5e650228 | 88 | case 4: |
dde8a902 | 89 | return -1; |
cd377f45 JK |
90 | case 5: |
91 | if (!(*flags & REFNAME_REFSPEC_PATTERN)) | |
92 | return -1; /* refspec can't be a pattern */ | |
93 | ||
94 | /* | |
95 | * Unset the pattern flag so that we only accept | |
96 | * a single asterisk for one side of refspec. | |
97 | */ | |
98 | *flags &= ~ REFNAME_REFSPEC_PATTERN; | |
99 | break; | |
dde8a902 | 100 | } |
bc5fd6d3 MH |
101 | last = ch; |
102 | } | |
dde8a902 | 103 | out: |
bc5fd6d3 | 104 | if (cp == refname) |
dac529e4 | 105 | return 0; /* Component has zero length. */ |
f3cc52d8 JN |
106 | if (refname[0] == '.') |
107 | return -1; /* Component starts with '.'. */ | |
7108ad23 MH |
108 | if (cp - refname >= LOCK_SUFFIX_LEN && |
109 | !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN)) | |
bc5fd6d3 MH |
110 | return -1; /* Refname ends with ".lock". */ |
111 | return cp - refname; | |
112 | } | |
113 | ||
5e650228 | 114 | int check_refname_format(const char *refname, int flags) |
bc5fd6d3 MH |
115 | { |
116 | int component_len, component_count = 0; | |
117 | ||
9ba89f48 FC |
118 | if (!strcmp(refname, "@")) |
119 | /* Refname is a single character '@'. */ | |
120 | return -1; | |
121 | ||
bc5fd6d3 MH |
122 | while (1) { |
123 | /* We are at the start of a path component. */ | |
cd377f45 JK |
124 | component_len = check_refname_component(refname, &flags); |
125 | if (component_len <= 0) | |
126 | return -1; | |
127 | ||
bc5fd6d3 MH |
128 | component_count++; |
129 | if (refname[component_len] == '\0') | |
130 | break; | |
131 | /* Skip to next component. */ | |
132 | refname += component_len + 1; | |
133 | } | |
134 | ||
135 | if (refname[component_len - 1] == '.') | |
136 | return -1; /* Refname ends with '.'. */ | |
137 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) | |
138 | return -1; /* Refname has only one component. */ | |
139 | return 0; | |
140 | } | |
141 | ||
4cb77009 | 142 | int refname_is_safe(const char *refname) |
d0f810f0 | 143 | { |
39950fef MH |
144 | const char *rest; |
145 | ||
146 | if (skip_prefix(refname, "refs/", &rest)) { | |
d0f810f0 RS |
147 | char *buf; |
148 | int result; | |
e40f3557 MH |
149 | size_t restlen = strlen(rest); |
150 | ||
151 | /* rest must not be empty, or start or end with "/" */ | |
152 | if (!restlen || *rest == '/' || rest[restlen - 1] == '/') | |
153 | return 0; | |
d0f810f0 | 154 | |
d0f810f0 RS |
155 | /* |
156 | * Does the refname try to escape refs/? | |
157 | * For example: refs/foo/../bar is safe but refs/foo/../../bar | |
158 | * is not. | |
159 | */ | |
e40f3557 MH |
160 | buf = xmallocz(restlen); |
161 | result = !normalize_path_copy(buf, rest) && !strcmp(buf, rest); | |
d0f810f0 RS |
162 | free(buf); |
163 | return result; | |
164 | } | |
35db25c6 MH |
165 | |
166 | do { | |
d0f810f0 RS |
167 | if (!isupper(*refname) && *refname != '_') |
168 | return 0; | |
169 | refname++; | |
35db25c6 | 170 | } while (*refname); |
d0f810f0 RS |
171 | return 1; |
172 | } | |
173 | ||
7d2df051 NTND |
174 | char *refs_resolve_refdup(struct ref_store *refs, |
175 | const char *refname, int resolve_flags, | |
176 | unsigned char *sha1, int *flags) | |
177 | { | |
178 | const char *result; | |
179 | ||
180 | result = refs_resolve_ref_unsafe(refs, refname, resolve_flags, | |
181 | sha1, flags); | |
182 | return xstrdup_or_null(result); | |
183 | } | |
184 | ||
7bd9bcf3 MH |
185 | char *resolve_refdup(const char *refname, int resolve_flags, |
186 | unsigned char *sha1, int *flags) | |
e1e22e37 | 187 | { |
7d2df051 NTND |
188 | return refs_resolve_refdup(get_main_ref_store(), |
189 | refname, resolve_flags, | |
190 | sha1, flags); | |
cddc4258 MH |
191 | } |
192 | ||
7bd9bcf3 MH |
193 | /* The argument to filter_refs */ |
194 | struct ref_filter { | |
195 | const char *pattern; | |
196 | each_ref_fn *fn; | |
197 | void *cb_data; | |
198 | }; | |
432ad41e | 199 | |
7d2df051 NTND |
200 | int refs_read_ref_full(struct ref_store *refs, const char *refname, |
201 | int resolve_flags, unsigned char *sha1, int *flags) | |
732134ed | 202 | { |
7d2df051 | 203 | if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, sha1, flags)) |
7bd9bcf3 MH |
204 | return 0; |
205 | return -1; | |
732134ed MH |
206 | } |
207 | ||
7d2df051 NTND |
208 | int read_ref_full(const char *refname, int resolve_flags, unsigned char *sha1, int *flags) |
209 | { | |
210 | return refs_read_ref_full(get_main_ref_store(), refname, | |
211 | resolve_flags, sha1, flags); | |
212 | } | |
213 | ||
7bd9bcf3 | 214 | int read_ref(const char *refname, unsigned char *sha1) |
cddc4258 | 215 | { |
7bd9bcf3 | 216 | return read_ref_full(refname, RESOLVE_REF_READING, sha1, NULL); |
c774aab9 JP |
217 | } |
218 | ||
7bd9bcf3 | 219 | int ref_exists(const char *refname) |
bc5fd6d3 | 220 | { |
7bd9bcf3 MH |
221 | unsigned char sha1[20]; |
222 | return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, sha1, NULL); | |
bc5fd6d3 MH |
223 | } |
224 | ||
7bd9bcf3 MH |
225 | static int filter_refs(const char *refname, const struct object_id *oid, |
226 | int flags, void *data) | |
432ad41e | 227 | { |
7bd9bcf3 MH |
228 | struct ref_filter *filter = (struct ref_filter *)data; |
229 | ||
230 | if (wildmatch(filter->pattern, refname, 0, NULL)) | |
231 | return 0; | |
232 | return filter->fn(refname, oid, flags, filter->cb_data); | |
432ad41e MH |
233 | } |
234 | ||
7bd9bcf3 | 235 | enum peel_status peel_object(const unsigned char *name, unsigned char *sha1) |
c774aab9 | 236 | { |
7bd9bcf3 | 237 | struct object *o = lookup_unknown_object(name); |
c774aab9 | 238 | |
7bd9bcf3 MH |
239 | if (o->type == OBJ_NONE) { |
240 | int type = sha1_object_info(name, NULL); | |
241 | if (type < 0 || !object_as_type(o, type, 0)) | |
242 | return PEEL_INVALID; | |
243 | } | |
bc5fd6d3 | 244 | |
7bd9bcf3 MH |
245 | if (o->type != OBJ_TAG) |
246 | return PEEL_NON_TAG; | |
e1980c9d | 247 | |
7bd9bcf3 MH |
248 | o = deref_tag_noverify(o); |
249 | if (!o) | |
250 | return PEEL_INVALID; | |
251 | ||
844a9ce4 | 252 | hashcpy(sha1, o->oid.hash); |
7bd9bcf3 | 253 | return PEEL_PEELED; |
e1980c9d JH |
254 | } |
255 | ||
7bd9bcf3 MH |
256 | struct warn_if_dangling_data { |
257 | FILE *fp; | |
258 | const char *refname; | |
259 | const struct string_list *refnames; | |
260 | const char *msg_fmt; | |
261 | }; | |
bc5fd6d3 | 262 | |
7bd9bcf3 MH |
263 | static int warn_if_dangling_symref(const char *refname, const struct object_id *oid, |
264 | int flags, void *cb_data) | |
265 | { | |
266 | struct warn_if_dangling_data *d = cb_data; | |
267 | const char *resolves_to; | |
268 | struct object_id junk; | |
bc5fd6d3 | 269 | |
7bd9bcf3 MH |
270 | if (!(flags & REF_ISSYMREF)) |
271 | return 0; | |
bc5fd6d3 | 272 | |
7bd9bcf3 MH |
273 | resolves_to = resolve_ref_unsafe(refname, 0, junk.hash, NULL); |
274 | if (!resolves_to | |
275 | || (d->refname | |
276 | ? strcmp(resolves_to, d->refname) | |
277 | : !string_list_has_string(d->refnames, resolves_to))) { | |
278 | return 0; | |
279 | } | |
bc5fd6d3 | 280 | |
7bd9bcf3 MH |
281 | fprintf(d->fp, d->msg_fmt, refname); |
282 | fputc('\n', d->fp); | |
283 | return 0; | |
bc5fd6d3 MH |
284 | } |
285 | ||
7bd9bcf3 | 286 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f348ac92 | 287 | { |
7bd9bcf3 MH |
288 | struct warn_if_dangling_data data; |
289 | ||
290 | data.fp = fp; | |
291 | data.refname = refname; | |
292 | data.refnames = NULL; | |
293 | data.msg_fmt = msg_fmt; | |
294 | for_each_rawref(warn_if_dangling_symref, &data); | |
f348ac92 MH |
295 | } |
296 | ||
7bd9bcf3 | 297 | void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames) |
432ad41e | 298 | { |
7bd9bcf3 | 299 | struct warn_if_dangling_data data; |
432ad41e | 300 | |
7bd9bcf3 MH |
301 | data.fp = fp; |
302 | data.refname = NULL; | |
303 | data.refnames = refnames; | |
304 | data.msg_fmt = msg_fmt; | |
305 | for_each_rawref(warn_if_dangling_symref, &data); | |
432ad41e MH |
306 | } |
307 | ||
7d2df051 NTND |
308 | int refs_for_each_tag_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
309 | { | |
310 | return refs_for_each_ref_in(refs, "refs/tags/", fn, cb_data); | |
311 | } | |
312 | ||
7bd9bcf3 | 313 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 314 | { |
7d2df051 | 315 | return refs_for_each_tag_ref(get_main_ref_store(), fn, cb_data); |
432ad41e MH |
316 | } |
317 | ||
7bd9bcf3 | 318 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
506a760d | 319 | { |
7d2df051 NTND |
320 | return refs_for_each_tag_ref(get_submodule_ref_store(submodule), |
321 | fn, cb_data); | |
322 | } | |
323 | ||
324 | int refs_for_each_branch_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
325 | { | |
326 | return refs_for_each_ref_in(refs, "refs/heads/", fn, cb_data); | |
432ad41e MH |
327 | } |
328 | ||
7bd9bcf3 | 329 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 330 | { |
7d2df051 | 331 | return refs_for_each_branch_ref(get_main_ref_store(), fn, cb_data); |
432ad41e MH |
332 | } |
333 | ||
7bd9bcf3 | 334 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
202a56a9 | 335 | { |
7d2df051 NTND |
336 | return refs_for_each_branch_ref(get_submodule_ref_store(submodule), |
337 | fn, cb_data); | |
338 | } | |
339 | ||
340 | int refs_for_each_remote_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) | |
341 | { | |
342 | return refs_for_each_ref_in(refs, "refs/remotes/", fn, cb_data); | |
202a56a9 | 343 | } |
432ad41e | 344 | |
7bd9bcf3 | 345 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
e9c4c111 | 346 | { |
7d2df051 | 347 | return refs_for_each_remote_ref(get_main_ref_store(), fn, cb_data); |
202a56a9 MH |
348 | } |
349 | ||
7bd9bcf3 | 350 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
e9c4c111 | 351 | { |
7d2df051 NTND |
352 | return refs_for_each_remote_ref(get_submodule_ref_store(submodule), |
353 | fn, cb_data); | |
662428f4 | 354 | } |
c774aab9 | 355 | |
7bd9bcf3 MH |
356 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
357 | { | |
358 | struct strbuf buf = STRBUF_INIT; | |
359 | int ret = 0; | |
360 | struct object_id oid; | |
361 | int flag; | |
c774aab9 | 362 | |
7bd9bcf3 MH |
363 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); |
364 | if (!read_ref_full(buf.buf, RESOLVE_REF_READING, oid.hash, &flag)) | |
365 | ret = fn(buf.buf, &oid, flag, cb_data); | |
366 | strbuf_release(&buf); | |
c774aab9 | 367 | |
7bd9bcf3 | 368 | return ret; |
e9c4c111 | 369 | } |
c774aab9 | 370 | |
7bd9bcf3 MH |
371 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
372 | const char *prefix, void *cb_data) | |
662428f4 | 373 | { |
7bd9bcf3 MH |
374 | struct strbuf real_pattern = STRBUF_INIT; |
375 | struct ref_filter filter; | |
376 | int ret; | |
d08bae7e | 377 | |
59556548 | 378 | if (!prefix && !starts_with(pattern, "refs/")) |
d08bae7e | 379 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
380 | else if (prefix) |
381 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
382 | strbuf_addstr(&real_pattern, pattern); |
383 | ||
894a9d33 | 384 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 385 | /* Append implied '/' '*' if not present. */ |
00b6c178 | 386 | strbuf_complete(&real_pattern, '/'); |
d08bae7e IL |
387 | /* No need to check for '*', there is none. */ |
388 | strbuf_addch(&real_pattern, '*'); | |
389 | } | |
390 | ||
391 | filter.pattern = real_pattern.buf; | |
392 | filter.fn = fn; | |
393 | filter.cb_data = cb_data; | |
394 | ret = for_each_ref(filter_refs, &filter); | |
395 | ||
396 | strbuf_release(&real_pattern); | |
397 | return ret; | |
398 | } | |
399 | ||
b09fe971 IL |
400 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
401 | { | |
402 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
403 | } | |
404 | ||
4577e483 | 405 | const char *prettify_refname(const char *name) |
a9c37a72 | 406 | { |
3e5b36c6 SG |
407 | if (skip_prefix(name, "refs/heads/", &name) || |
408 | skip_prefix(name, "refs/tags/", &name) || | |
409 | skip_prefix(name, "refs/remotes/", &name)) | |
410 | ; /* nothing */ | |
411 | return name; | |
a9c37a72 DB |
412 | } |
413 | ||
54457fe5 | 414 | static const char *ref_rev_parse_rules[] = { |
79803322 SP |
415 | "%.*s", |
416 | "refs/%.*s", | |
417 | "refs/tags/%.*s", | |
418 | "refs/heads/%.*s", | |
419 | "refs/remotes/%.*s", | |
420 | "refs/remotes/%.*s/HEAD", | |
421 | NULL | |
422 | }; | |
423 | ||
54457fe5 | 424 | int refname_match(const char *abbrev_name, const char *full_name) |
79803322 SP |
425 | { |
426 | const char **p; | |
427 | const int abbrev_name_len = strlen(abbrev_name); | |
428 | ||
54457fe5 | 429 | for (p = ref_rev_parse_rules; *p; p++) { |
79803322 SP |
430 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { |
431 | return 1; | |
432 | } | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
ff74f7f1 JH |
438 | /* |
439 | * *string and *len will only be substituted, and *string returned (for | |
440 | * later free()ing) if the string passed in is a magic short-hand form | |
441 | * to name a branch. | |
442 | */ | |
443 | static char *substitute_branch_name(const char **string, int *len) | |
444 | { | |
445 | struct strbuf buf = STRBUF_INIT; | |
0e9f62da | 446 | int ret = interpret_branch_name(*string, *len, &buf, 0); |
ff74f7f1 JH |
447 | |
448 | if (ret == *len) { | |
449 | size_t size; | |
450 | *string = strbuf_detach(&buf, &size); | |
451 | *len = size; | |
452 | return (char *)*string; | |
453 | } | |
454 | ||
455 | return NULL; | |
456 | } | |
457 | ||
458 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
459 | { | |
460 | char *last_branch = substitute_branch_name(&str, &len); | |
41da7111 NTND |
461 | int refs_found = expand_ref(str, len, sha1, ref); |
462 | free(last_branch); | |
463 | return refs_found; | |
464 | } | |
465 | ||
466 | int expand_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
467 | { | |
ff74f7f1 JH |
468 | const char **p, *r; |
469 | int refs_found = 0; | |
6cd4a898 | 470 | struct strbuf fullref = STRBUF_INIT; |
ff74f7f1 JH |
471 | |
472 | *ref = NULL; | |
473 | for (p = ref_rev_parse_rules; *p; p++) { | |
ff74f7f1 JH |
474 | unsigned char sha1_from_ref[20]; |
475 | unsigned char *this_result; | |
476 | int flag; | |
477 | ||
478 | this_result = refs_found ? sha1_from_ref : sha1; | |
6cd4a898 JK |
479 | strbuf_reset(&fullref); |
480 | strbuf_addf(&fullref, *p, len, str); | |
481 | r = resolve_ref_unsafe(fullref.buf, RESOLVE_REF_READING, | |
7695d118 | 482 | this_result, &flag); |
ff74f7f1 JH |
483 | if (r) { |
484 | if (!refs_found++) | |
485 | *ref = xstrdup(r); | |
486 | if (!warn_ambiguous_refs) | |
487 | break; | |
6cd4a898 JK |
488 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref.buf, "HEAD")) { |
489 | warning("ignoring dangling symref %s.", fullref.buf); | |
490 | } else if ((flag & REF_ISBROKEN) && strchr(fullref.buf, '/')) { | |
491 | warning("ignoring broken ref %s.", fullref.buf); | |
55956350 | 492 | } |
ff74f7f1 | 493 | } |
6cd4a898 | 494 | strbuf_release(&fullref); |
ff74f7f1 JH |
495 | return refs_found; |
496 | } | |
497 | ||
498 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
499 | { | |
500 | char *last_branch = substitute_branch_name(&str, &len); | |
501 | const char **p; | |
502 | int logs_found = 0; | |
6cd4a898 | 503 | struct strbuf path = STRBUF_INIT; |
ff74f7f1 JH |
504 | |
505 | *log = NULL; | |
506 | for (p = ref_rev_parse_rules; *p; p++) { | |
ff74f7f1 | 507 | unsigned char hash[20]; |
ff74f7f1 JH |
508 | const char *ref, *it; |
509 | ||
6cd4a898 JK |
510 | strbuf_reset(&path); |
511 | strbuf_addf(&path, *p, len, str); | |
512 | ref = resolve_ref_unsafe(path.buf, RESOLVE_REF_READING, | |
7695d118 | 513 | hash, NULL); |
ff74f7f1 JH |
514 | if (!ref) |
515 | continue; | |
6cd4a898 JK |
516 | if (reflog_exists(path.buf)) |
517 | it = path.buf; | |
518 | else if (strcmp(ref, path.buf) && reflog_exists(ref)) | |
ff74f7f1 JH |
519 | it = ref; |
520 | else | |
521 | continue; | |
522 | if (!logs_found++) { | |
523 | *log = xstrdup(it); | |
524 | hashcpy(sha1, hash); | |
525 | } | |
7bd9bcf3 MH |
526 | if (!warn_ambiguous_refs) |
527 | break; | |
c0277d15 | 528 | } |
6cd4a898 | 529 | strbuf_release(&path); |
7bd9bcf3 MH |
530 | free(last_branch); |
531 | return logs_found; | |
2ddb5d17 BK |
532 | } |
533 | ||
266b1827 DT |
534 | static int is_per_worktree_ref(const char *refname) |
535 | { | |
ce414b33 DT |
536 | return !strcmp(refname, "HEAD") || |
537 | starts_with(refname, "refs/bisect/"); | |
266b1827 DT |
538 | } |
539 | ||
540 | static int is_pseudoref_syntax(const char *refname) | |
541 | { | |
542 | const char *c; | |
543 | ||
544 | for (c = refname; *c; c++) { | |
545 | if (!isupper(*c) && *c != '-' && *c != '_') | |
546 | return 0; | |
547 | } | |
548 | ||
549 | return 1; | |
550 | } | |
551 | ||
552 | enum ref_type ref_type(const char *refname) | |
553 | { | |
554 | if (is_per_worktree_ref(refname)) | |
555 | return REF_TYPE_PER_WORKTREE; | |
556 | if (is_pseudoref_syntax(refname)) | |
557 | return REF_TYPE_PSEUDOREF; | |
558 | return REF_TYPE_NORMAL; | |
559 | } | |
560 | ||
74ec19d4 DT |
561 | static int write_pseudoref(const char *pseudoref, const unsigned char *sha1, |
562 | const unsigned char *old_sha1, struct strbuf *err) | |
563 | { | |
564 | const char *filename; | |
565 | int fd; | |
566 | static struct lock_file lock; | |
567 | struct strbuf buf = STRBUF_INIT; | |
568 | int ret = -1; | |
569 | ||
570 | strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1)); | |
571 | ||
572 | filename = git_path("%s", pseudoref); | |
573 | fd = hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR); | |
574 | if (fd < 0) { | |
0568c8e9 | 575 | strbuf_addf(err, "could not open '%s' for writing: %s", |
74ec19d4 DT |
576 | filename, strerror(errno)); |
577 | return -1; | |
578 | } | |
579 | ||
580 | if (old_sha1) { | |
581 | unsigned char actual_old_sha1[20]; | |
2c3aed13 DT |
582 | |
583 | if (read_ref(pseudoref, actual_old_sha1)) | |
584 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 | 585 | if (hashcmp(actual_old_sha1, old_sha1)) { |
0568c8e9 | 586 | strbuf_addf(err, "unexpected sha1 when writing '%s'", pseudoref); |
74ec19d4 DT |
587 | rollback_lock_file(&lock); |
588 | goto done; | |
589 | } | |
590 | } | |
591 | ||
592 | if (write_in_full(fd, buf.buf, buf.len) != buf.len) { | |
0568c8e9 | 593 | strbuf_addf(err, "could not write to '%s'", filename); |
74ec19d4 DT |
594 | rollback_lock_file(&lock); |
595 | goto done; | |
596 | } | |
597 | ||
598 | commit_lock_file(&lock); | |
599 | ret = 0; | |
600 | done: | |
601 | strbuf_release(&buf); | |
602 | return ret; | |
603 | } | |
604 | ||
605 | static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1) | |
606 | { | |
607 | static struct lock_file lock; | |
608 | const char *filename; | |
609 | ||
610 | filename = git_path("%s", pseudoref); | |
611 | ||
612 | if (old_sha1 && !is_null_sha1(old_sha1)) { | |
613 | int fd; | |
614 | unsigned char actual_old_sha1[20]; | |
615 | ||
616 | fd = hold_lock_file_for_update(&lock, filename, | |
617 | LOCK_DIE_ON_ERROR); | |
618 | if (fd < 0) | |
619 | die_errno(_("Could not open '%s' for writing"), filename); | |
2c3aed13 DT |
620 | if (read_ref(pseudoref, actual_old_sha1)) |
621 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 DT |
622 | if (hashcmp(actual_old_sha1, old_sha1)) { |
623 | warning("Unexpected sha1 when deleting %s", pseudoref); | |
624 | rollback_lock_file(&lock); | |
625 | return -1; | |
a4c653df | 626 | } |
74ec19d4 DT |
627 | |
628 | unlink(filename); | |
629 | rollback_lock_file(&lock); | |
630 | } else { | |
631 | unlink(filename); | |
4bd18c43 | 632 | } |
a4c653df | 633 | |
4bd18c43 | 634 | return 0; |
95fc7512 | 635 | } |
d556fae2 | 636 | |
c0fe4e8b NTND |
637 | int refs_delete_ref(struct ref_store *refs, const char *msg, |
638 | const char *refname, | |
639 | const unsigned char *old_sha1, | |
640 | unsigned int flags) | |
41b625b0 | 641 | { |
7521cc46 | 642 | struct ref_transaction *transaction; |
a4c653df | 643 | struct strbuf err = STRBUF_INIT; |
8b5157e4 | 644 | |
c0fe4e8b NTND |
645 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { |
646 | assert(refs == get_main_ref_store()); | |
080cc646 | 647 | return delete_pseudoref(refname, old_sha1); |
c0fe4e8b | 648 | } |
d48744d1 | 649 | |
c0fe4e8b | 650 | transaction = ref_store_transaction_begin(refs, &err); |
7521cc46 | 651 | if (!transaction || |
fc67a082 | 652 | ref_transaction_delete(transaction, refname, old_sha1, |
755b49ae | 653 | flags, msg, &err) || |
db7516ab | 654 | ref_transaction_commit(transaction, &err)) { |
7521cc46 RS |
655 | error("%s", err.buf); |
656 | ref_transaction_free(transaction); | |
657 | strbuf_release(&err); | |
c0277d15 | 658 | return 1; |
41b625b0 | 659 | } |
7bd9bcf3 MH |
660 | ref_transaction_free(transaction); |
661 | strbuf_release(&err); | |
b531394d BC |
662 | return 0; |
663 | } | |
41b625b0 | 664 | |
c0fe4e8b NTND |
665 | int delete_ref(const char *msg, const char *refname, |
666 | const unsigned char *old_sha1, unsigned int flags) | |
667 | { | |
668 | return refs_delete_ref(get_main_ref_store(), msg, refname, | |
669 | old_sha1, flags); | |
670 | } | |
671 | ||
4cb77009 | 672 | int copy_reflog_msg(char *buf, const char *msg) |
0ec29a47 JH |
673 | { |
674 | char *cp = buf; | |
675 | char c; | |
676 | int wasspace = 1; | |
8b5157e4 | 677 | |
0ec29a47 JH |
678 | *cp++ = '\t'; |
679 | while ((c = *msg++)) { | |
680 | if (wasspace && isspace(c)) | |
681 | continue; | |
682 | wasspace = isspace(c); | |
683 | if (wasspace) | |
684 | c = ' '; | |
685 | *cp++ = c; | |
a4c653df | 686 | } |
0ec29a47 JH |
687 | while (buf < cp && isspace(cp[-1])) |
688 | cp--; | |
689 | *cp++ = '\n'; | |
690 | return cp - buf; | |
691 | } | |
8b5157e4 | 692 | |
4cb77009 | 693 | int should_autocreate_reflog(const char *refname) |
4e2bef57 | 694 | { |
341fb286 CW |
695 | switch (log_all_ref_updates) { |
696 | case LOG_REFS_ALWAYS: | |
697 | return 1; | |
698 | case LOG_REFS_NORMAL: | |
699 | return starts_with(refname, "refs/heads/") || | |
700 | starts_with(refname, "refs/remotes/") || | |
701 | starts_with(refname, "refs/notes/") || | |
702 | !strcmp(refname, "HEAD"); | |
703 | default: | |
4e2bef57 | 704 | return 0; |
341fb286 | 705 | } |
4e2bef57 DT |
706 | } |
707 | ||
e7e0f26e | 708 | int is_branch(const char *refname) |
c3b0dec5 | 709 | { |
59556548 | 710 | return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/"); |
41b625b0 NP |
711 | } |
712 | ||
4207ed28 RS |
713 | struct read_ref_at_cb { |
714 | const char *refname; | |
715 | unsigned long at_time; | |
716 | int cnt; | |
717 | int reccnt; | |
718 | unsigned char *sha1; | |
719 | int found_it; | |
720 | ||
721 | unsigned char osha1[20]; | |
722 | unsigned char nsha1[20]; | |
723 | int tz; | |
724 | unsigned long date; | |
725 | char **msg; | |
726 | unsigned long *cutoff_time; | |
727 | int *cutoff_tz; | |
728 | int *cutoff_cnt; | |
729 | }; | |
730 | ||
9461d272 | 731 | static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid, |
4207ed28 RS |
732 | const char *email, unsigned long timestamp, int tz, |
733 | const char *message, void *cb_data) | |
734 | { | |
735 | struct read_ref_at_cb *cb = cb_data; | |
736 | ||
737 | cb->reccnt++; | |
738 | cb->tz = tz; | |
739 | cb->date = timestamp; | |
740 | ||
741 | if (timestamp <= cb->at_time || cb->cnt == 0) { | |
742 | if (cb->msg) | |
743 | *cb->msg = xstrdup(message); | |
744 | if (cb->cutoff_time) | |
745 | *cb->cutoff_time = timestamp; | |
746 | if (cb->cutoff_tz) | |
747 | *cb->cutoff_tz = tz; | |
748 | if (cb->cutoff_cnt) | |
749 | *cb->cutoff_cnt = cb->reccnt - 1; | |
750 | /* | |
751 | * we have not yet updated cb->[n|o]sha1 so they still | |
752 | * hold the values for the previous record. | |
753 | */ | |
754 | if (!is_null_sha1(cb->osha1)) { | |
9461d272 | 755 | hashcpy(cb->sha1, noid->hash); |
756 | if (hashcmp(cb->osha1, noid->hash)) | |
4207ed28 | 757 | warning("Log for ref %s has gap after %s.", |
a5481a6c | 758 | cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822))); |
4207ed28 RS |
759 | } |
760 | else if (cb->date == cb->at_time) | |
9461d272 | 761 | hashcpy(cb->sha1, noid->hash); |
762 | else if (hashcmp(noid->hash, cb->sha1)) | |
4207ed28 RS |
763 | warning("Log for ref %s unexpectedly ended on %s.", |
764 | cb->refname, show_date(cb->date, cb->tz, | |
a5481a6c | 765 | DATE_MODE(RFC2822))); |
9461d272 | 766 | hashcpy(cb->osha1, ooid->hash); |
767 | hashcpy(cb->nsha1, noid->hash); | |
4207ed28 RS |
768 | cb->found_it = 1; |
769 | return 1; | |
770 | } | |
9461d272 | 771 | hashcpy(cb->osha1, ooid->hash); |
772 | hashcpy(cb->nsha1, noid->hash); | |
4207ed28 RS |
773 | if (cb->cnt > 0) |
774 | cb->cnt--; | |
775 | return 0; | |
776 | } | |
777 | ||
9461d272 | 778 | static int read_ref_at_ent_oldest(struct object_id *ooid, struct object_id *noid, |
4207ed28 RS |
779 | const char *email, unsigned long timestamp, |
780 | int tz, const char *message, void *cb_data) | |
781 | { | |
782 | struct read_ref_at_cb *cb = cb_data; | |
783 | ||
784 | if (cb->msg) | |
785 | *cb->msg = xstrdup(message); | |
786 | if (cb->cutoff_time) | |
787 | *cb->cutoff_time = timestamp; | |
788 | if (cb->cutoff_tz) | |
789 | *cb->cutoff_tz = tz; | |
790 | if (cb->cutoff_cnt) | |
791 | *cb->cutoff_cnt = cb->reccnt; | |
9461d272 | 792 | hashcpy(cb->sha1, ooid->hash); |
4207ed28 | 793 | if (is_null_sha1(cb->sha1)) |
9461d272 | 794 | hashcpy(cb->sha1, noid->hash); |
4207ed28 RS |
795 | /* We just want the first entry */ |
796 | return 1; | |
16d7cc90 JH |
797 | } |
798 | ||
c41a87dd | 799 | int read_ref_at(const char *refname, unsigned int flags, unsigned long at_time, int cnt, |
dfefa935 MH |
800 | unsigned char *sha1, char **msg, |
801 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 802 | { |
4207ed28 | 803 | struct read_ref_at_cb cb; |
d556fae2 | 804 | |
4207ed28 RS |
805 | memset(&cb, 0, sizeof(cb)); |
806 | cb.refname = refname; | |
807 | cb.at_time = at_time; | |
808 | cb.cnt = cnt; | |
809 | cb.msg = msg; | |
810 | cb.cutoff_time = cutoff_time; | |
811 | cb.cutoff_tz = cutoff_tz; | |
812 | cb.cutoff_cnt = cutoff_cnt; | |
813 | cb.sha1 = sha1; | |
814 | ||
815 | for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb); | |
816 | ||
c41a87dd DA |
817 | if (!cb.reccnt) { |
818 | if (flags & GET_SHA1_QUIETLY) | |
819 | exit(128); | |
820 | else | |
821 | die("Log for %s is empty.", refname); | |
822 | } | |
4207ed28 RS |
823 | if (cb.found_it) |
824 | return 0; | |
825 | ||
826 | for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb); | |
d556fae2 | 827 | |
16d7cc90 | 828 | return 1; |
d556fae2 | 829 | } |
2ff81662 | 830 | |
c0fe4e8b NTND |
831 | struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs, |
832 | struct strbuf *err) | |
caa4046c | 833 | { |
c0fe4e8b | 834 | struct ref_transaction *tr; |
5a603b04 JN |
835 | assert(err); |
836 | ||
c0fe4e8b NTND |
837 | tr = xcalloc(1, sizeof(struct ref_transaction)); |
838 | tr->ref_store = refs; | |
839 | return tr; | |
840 | } | |
841 | ||
842 | struct ref_transaction *ref_transaction_begin(struct strbuf *err) | |
843 | { | |
844 | return ref_store_transaction_begin(get_main_ref_store(), err); | |
caa4046c MH |
845 | } |
846 | ||
026bd1d3 | 847 | void ref_transaction_free(struct ref_transaction *transaction) |
caa4046c MH |
848 | { |
849 | int i; | |
850 | ||
1b07255c RS |
851 | if (!transaction) |
852 | return; | |
853 | ||
db7516ab RS |
854 | for (i = 0; i < transaction->nr; i++) { |
855 | free(transaction->updates[i]->msg); | |
88615910 | 856 | free(transaction->updates[i]); |
db7516ab | 857 | } |
caa4046c MH |
858 | free(transaction->updates); |
859 | free(transaction); | |
860 | } | |
861 | ||
71564516 MH |
862 | struct ref_update *ref_transaction_add_update( |
863 | struct ref_transaction *transaction, | |
864 | const char *refname, unsigned int flags, | |
865 | const unsigned char *new_sha1, | |
866 | const unsigned char *old_sha1, | |
867 | const char *msg) | |
caa4046c | 868 | { |
96ffc06f | 869 | struct ref_update *update; |
71564516 MH |
870 | |
871 | if (transaction->state != REF_TRANSACTION_OPEN) | |
872 | die("BUG: update called for transaction that is not open"); | |
873 | ||
874 | if ((flags & REF_ISPRUNING) && !(flags & REF_NODEREF)) | |
875 | die("BUG: REF_ISPRUNING set without REF_NODEREF"); | |
876 | ||
96ffc06f | 877 | FLEX_ALLOC_STR(update, refname, refname); |
caa4046c MH |
878 | ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc); |
879 | transaction->updates[transaction->nr++] = update; | |
71564516 MH |
880 | |
881 | update->flags = flags; | |
882 | ||
883 | if (flags & REF_HAVE_NEW) | |
884 | hashcpy(update->new_sha1, new_sha1); | |
885 | if (flags & REF_HAVE_OLD) | |
886 | hashcpy(update->old_sha1, old_sha1); | |
13092a91 | 887 | update->msg = xstrdup_or_null(msg); |
caa4046c MH |
888 | return update; |
889 | } | |
890 | ||
8e34800e RS |
891 | int ref_transaction_update(struct ref_transaction *transaction, |
892 | const char *refname, | |
893 | const unsigned char *new_sha1, | |
894 | const unsigned char *old_sha1, | |
1d147bdf | 895 | unsigned int flags, const char *msg, |
8e34800e | 896 | struct strbuf *err) |
caa4046c | 897 | { |
5a603b04 JN |
898 | assert(err); |
899 | ||
8a679de6 MH |
900 | if ((new_sha1 && !is_null_sha1(new_sha1)) ? |
901 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) : | |
902 | !refname_is_safe(refname)) { | |
0568c8e9 | 903 | strbuf_addf(err, "refusing to update ref with bad name '%s'", |
d0f810f0 RS |
904 | refname); |
905 | return -1; | |
906 | } | |
907 | ||
71564516 MH |
908 | flags |= (new_sha1 ? REF_HAVE_NEW : 0) | (old_sha1 ? REF_HAVE_OLD : 0); |
909 | ||
910 | ref_transaction_add_update(transaction, refname, flags, | |
911 | new_sha1, old_sha1, msg); | |
8e34800e | 912 | return 0; |
caa4046c MH |
913 | } |
914 | ||
b416af5b RS |
915 | int ref_transaction_create(struct ref_transaction *transaction, |
916 | const char *refname, | |
917 | const unsigned char *new_sha1, | |
fec14ec3 | 918 | unsigned int flags, const char *msg, |
b416af5b | 919 | struct strbuf *err) |
caa4046c | 920 | { |
f04c5b55 MH |
921 | if (!new_sha1 || is_null_sha1(new_sha1)) |
922 | die("BUG: create called without valid new_sha1"); | |
bc9f2925 | 923 | return ref_transaction_update(transaction, refname, new_sha1, |
1d147bdf | 924 | null_sha1, flags, msg, err); |
caa4046c MH |
925 | } |
926 | ||
8c8bdc0d RS |
927 | int ref_transaction_delete(struct ref_transaction *transaction, |
928 | const char *refname, | |
929 | const unsigned char *old_sha1, | |
fb5a6bb6 | 930 | unsigned int flags, const char *msg, |
8c8bdc0d | 931 | struct strbuf *err) |
caa4046c | 932 | { |
60294596 MH |
933 | if (old_sha1 && is_null_sha1(old_sha1)) |
934 | die("BUG: delete called with old_sha1 set to zeros"); | |
1d147bdf | 935 | return ref_transaction_update(transaction, refname, |
fb5a6bb6 | 936 | null_sha1, old_sha1, |
1d147bdf | 937 | flags, msg, err); |
caa4046c MH |
938 | } |
939 | ||
16180334 MH |
940 | int ref_transaction_verify(struct ref_transaction *transaction, |
941 | const char *refname, | |
942 | const unsigned char *old_sha1, | |
943 | unsigned int flags, | |
944 | struct strbuf *err) | |
945 | { | |
946 | if (!old_sha1) | |
947 | die("BUG: verify called with old_sha1 set to NULL"); | |
948 | return ref_transaction_update(transaction, refname, | |
949 | NULL, old_sha1, | |
950 | flags, NULL, err); | |
951 | } | |
952 | ||
8f6dc7e3 | 953 | int update_ref_oid(const char *msg, const char *refname, |
954 | const struct object_id *new_oid, const struct object_id *old_oid, | |
955 | unsigned int flags, enum action_on_err onerr) | |
956 | { | |
957 | return update_ref(msg, refname, new_oid ? new_oid->hash : NULL, | |
958 | old_oid ? old_oid->hash : NULL, flags, onerr); | |
959 | } | |
960 | ||
c0fe4e8b NTND |
961 | int refs_update_ref(struct ref_store *refs, const char *msg, |
962 | const char *refname, const unsigned char *new_sha1, | |
963 | const unsigned char *old_sha1, unsigned int flags, | |
964 | enum action_on_err onerr) | |
4738a333 | 965 | { |
74ec19d4 | 966 | struct ref_transaction *t = NULL; |
b4d75ac1 | 967 | struct strbuf err = STRBUF_INIT; |
74ec19d4 | 968 | int ret = 0; |
b4d75ac1 | 969 | |
74ec19d4 | 970 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { |
c0fe4e8b | 971 | assert(refs == get_main_ref_store()); |
74ec19d4 DT |
972 | ret = write_pseudoref(refname, new_sha1, old_sha1, &err); |
973 | } else { | |
c0fe4e8b | 974 | t = ref_store_transaction_begin(refs, &err); |
74ec19d4 DT |
975 | if (!t || |
976 | ref_transaction_update(t, refname, new_sha1, old_sha1, | |
977 | flags, msg, &err) || | |
978 | ref_transaction_commit(t, &err)) { | |
979 | ret = 1; | |
980 | ref_transaction_free(t); | |
981 | } | |
982 | } | |
983 | if (ret) { | |
b4d75ac1 RS |
984 | const char *str = "update_ref failed for ref '%s': %s"; |
985 | ||
b4d75ac1 RS |
986 | switch (onerr) { |
987 | case UPDATE_REFS_MSG_ON_ERR: | |
988 | error(str, refname, err.buf); | |
989 | break; | |
990 | case UPDATE_REFS_DIE_ON_ERR: | |
991 | die(str, refname, err.buf); | |
992 | break; | |
993 | case UPDATE_REFS_QUIET_ON_ERR: | |
994 | break; | |
995 | } | |
996 | strbuf_release(&err); | |
4738a333 | 997 | return 1; |
b4d75ac1 RS |
998 | } |
999 | strbuf_release(&err); | |
74ec19d4 DT |
1000 | if (t) |
1001 | ref_transaction_free(t); | |
b4d75ac1 | 1002 | return 0; |
4738a333 BK |
1003 | } |
1004 | ||
c0fe4e8b NTND |
1005 | int update_ref(const char *msg, const char *refname, |
1006 | const unsigned char *new_sha1, | |
1007 | const unsigned char *old_sha1, | |
1008 | unsigned int flags, enum action_on_err onerr) | |
1009 | { | |
1010 | return refs_update_ref(get_main_ref_store(), msg, refname, new_sha1, | |
1011 | old_sha1, flags, onerr); | |
1012 | } | |
1013 | ||
dfefa935 | 1014 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
1015 | { |
1016 | int i; | |
1017 | static char **scanf_fmts; | |
1018 | static int nr_rules; | |
1019 | char *short_name; | |
6cd4a898 | 1020 | struct strbuf resolved_buf = STRBUF_INIT; |
7c2b3029 | 1021 | |
7c2b3029 | 1022 | if (!nr_rules) { |
4346663a MH |
1023 | /* |
1024 | * Pre-generate scanf formats from ref_rev_parse_rules[]. | |
1025 | * Generate a format suitable for scanf from a | |
1026 | * ref_rev_parse_rules rule by interpolating "%s" at the | |
1027 | * location of the "%.*s". | |
1028 | */ | |
7c2b3029 | 1029 | size_t total_len = 0; |
84d5633f | 1030 | size_t offset = 0; |
7c2b3029 JK |
1031 | |
1032 | /* the rule list is NULL terminated, count them first */ | |
a4165851 | 1033 | for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++) |
7902fe03 MH |
1034 | /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */ |
1035 | total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1; | |
7c2b3029 | 1036 | |
50492f7b | 1037 | scanf_fmts = xmalloc(st_add(st_mult(sizeof(char *), nr_rules), total_len)); |
7c2b3029 | 1038 | |
84d5633f | 1039 | offset = 0; |
7c2b3029 | 1040 | for (i = 0; i < nr_rules; i++) { |
4346663a | 1041 | assert(offset < total_len); |
84d5633f | 1042 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset; |
4346663a MH |
1043 | offset += snprintf(scanf_fmts[i], total_len - offset, |
1044 | ref_rev_parse_rules[i], 2, "%s") + 1; | |
7c2b3029 JK |
1045 | } |
1046 | } | |
1047 | ||
1048 | /* bail out if there are no rules */ | |
1049 | if (!nr_rules) | |
dfefa935 | 1050 | return xstrdup(refname); |
7c2b3029 | 1051 | |
dfefa935 MH |
1052 | /* buffer for scanf result, at most refname must fit */ |
1053 | short_name = xstrdup(refname); | |
7c2b3029 JK |
1054 | |
1055 | /* skip first rule, it will always match */ | |
1056 | for (i = nr_rules - 1; i > 0 ; --i) { | |
1057 | int j; | |
6e7b3309 | 1058 | int rules_to_fail = i; |
7c2b3029 JK |
1059 | int short_name_len; |
1060 | ||
dfefa935 | 1061 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
1062 | continue; |
1063 | ||
1064 | short_name_len = strlen(short_name); | |
1065 | ||
6e7b3309 BW |
1066 | /* |
1067 | * in strict mode, all (except the matched one) rules | |
1068 | * must fail to resolve to a valid non-ambiguous ref | |
1069 | */ | |
1070 | if (strict) | |
1071 | rules_to_fail = nr_rules; | |
1072 | ||
7c2b3029 JK |
1073 | /* |
1074 | * check if the short name resolves to a valid ref, | |
1075 | * but use only rules prior to the matched one | |
1076 | */ | |
6e7b3309 | 1077 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 1078 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 | 1079 | |
6e7b3309 BW |
1080 | /* skip matched rule */ |
1081 | if (i == j) | |
1082 | continue; | |
1083 | ||
7c2b3029 JK |
1084 | /* |
1085 | * the short name is ambiguous, if it resolves | |
1086 | * (with this previous rule) to a valid ref | |
1087 | * read_ref() returns 0 on success | |
1088 | */ | |
6cd4a898 JK |
1089 | strbuf_reset(&resolved_buf); |
1090 | strbuf_addf(&resolved_buf, rule, | |
1091 | short_name_len, short_name); | |
1092 | if (ref_exists(resolved_buf.buf)) | |
7c2b3029 JK |
1093 | break; |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * short name is non-ambiguous if all previous rules | |
1098 | * haven't resolved to a valid ref | |
1099 | */ | |
6cd4a898 JK |
1100 | if (j == rules_to_fail) { |
1101 | strbuf_release(&resolved_buf); | |
7c2b3029 | 1102 | return short_name; |
6cd4a898 | 1103 | } |
7c2b3029 JK |
1104 | } |
1105 | ||
6cd4a898 | 1106 | strbuf_release(&resolved_buf); |
7c2b3029 | 1107 | free(short_name); |
dfefa935 | 1108 | return xstrdup(refname); |
7c2b3029 | 1109 | } |
daebaa78 JH |
1110 | |
1111 | static struct string_list *hide_refs; | |
1112 | ||
1113 | int parse_hide_refs_config(const char *var, const char *value, const char *section) | |
1114 | { | |
ad8c7cda | 1115 | const char *key; |
daebaa78 | 1116 | if (!strcmp("transfer.hiderefs", var) || |
ad8c7cda JK |
1117 | (!parse_config_key(var, section, NULL, NULL, &key) && |
1118 | !strcmp(key, "hiderefs"))) { | |
daebaa78 JH |
1119 | char *ref; |
1120 | int len; | |
1121 | ||
1122 | if (!value) | |
1123 | return config_error_nonbool(var); | |
1124 | ref = xstrdup(value); | |
1125 | len = strlen(ref); | |
1126 | while (len && ref[len - 1] == '/') | |
1127 | ref[--len] = '\0'; | |
1128 | if (!hide_refs) { | |
1129 | hide_refs = xcalloc(1, sizeof(*hide_refs)); | |
1130 | hide_refs->strdup_strings = 1; | |
1131 | } | |
1132 | string_list_append(hide_refs, ref); | |
1133 | } | |
1134 | return 0; | |
1135 | } | |
1136 | ||
78a766ab | 1137 | int ref_is_hidden(const char *refname, const char *refname_full) |
daebaa78 | 1138 | { |
2bc31d16 | 1139 | int i; |
daebaa78 JH |
1140 | |
1141 | if (!hide_refs) | |
1142 | return 0; | |
2bc31d16 JK |
1143 | for (i = hide_refs->nr - 1; i >= 0; i--) { |
1144 | const char *match = hide_refs->items[i].string; | |
78a766ab | 1145 | const char *subject; |
2bc31d16 | 1146 | int neg = 0; |
daebaa78 | 1147 | int len; |
2bc31d16 JK |
1148 | |
1149 | if (*match == '!') { | |
1150 | neg = 1; | |
1151 | match++; | |
1152 | } | |
1153 | ||
78a766ab LF |
1154 | if (*match == '^') { |
1155 | subject = refname_full; | |
1156 | match++; | |
1157 | } else { | |
1158 | subject = refname; | |
1159 | } | |
1160 | ||
1161 | /* refname can be NULL when namespaces are used. */ | |
1162 | if (!subject || !starts_with(subject, match)) | |
daebaa78 | 1163 | continue; |
2bc31d16 | 1164 | len = strlen(match); |
78a766ab | 1165 | if (!subject[len] || subject[len] == '/') |
2bc31d16 | 1166 | return !neg; |
daebaa78 JH |
1167 | } |
1168 | return 0; | |
1169 | } | |
fa5b1830 | 1170 | |
0845122c DT |
1171 | const char *find_descendant_ref(const char *dirname, |
1172 | const struct string_list *extras, | |
1173 | const struct string_list *skip) | |
fa5b1830 | 1174 | { |
0845122c | 1175 | int pos; |
fa5b1830 | 1176 | |
0845122c DT |
1177 | if (!extras) |
1178 | return NULL; | |
fa5b1830 MH |
1179 | |
1180 | /* | |
0845122c DT |
1181 | * Look at the place where dirname would be inserted into |
1182 | * extras. If there is an entry at that position that starts | |
1183 | * with dirname (remember, dirname includes the trailing | |
1184 | * slash) and is not in skip, then we have a conflict. | |
fa5b1830 | 1185 | */ |
0845122c DT |
1186 | for (pos = string_list_find_insert_index(extras, dirname, 0); |
1187 | pos < extras->nr; pos++) { | |
1188 | const char *extra_refname = extras->items[pos].string; | |
fa5b1830 | 1189 | |
0845122c DT |
1190 | if (!starts_with(extra_refname, dirname)) |
1191 | break; | |
1192 | ||
1193 | if (!skip || !string_list_has_string(skip, extra_refname)) | |
1194 | return extra_refname; | |
fa5b1830 | 1195 | } |
0845122c DT |
1196 | return NULL; |
1197 | } | |
fa5b1830 | 1198 | |
7d2df051 NTND |
1199 | int refs_rename_ref_available(struct ref_store *refs, |
1200 | const char *old_refname, | |
1201 | const char *new_refname) | |
0845122c DT |
1202 | { |
1203 | struct string_list skip = STRING_LIST_INIT_NODUP; | |
1204 | struct strbuf err = STRBUF_INIT; | |
ff3a299c | 1205 | int ok; |
fa5b1830 | 1206 | |
ff3a299c | 1207 | string_list_insert(&skip, old_refname); |
7d2df051 NTND |
1208 | ok = !refs_verify_refname_available(refs, new_refname, |
1209 | NULL, &skip, &err); | |
ff3a299c | 1210 | if (!ok) |
0845122c DT |
1211 | error("%s", err.buf); |
1212 | ||
1213 | string_list_clear(&skip, 0); | |
1214 | strbuf_release(&err); | |
ff3a299c | 1215 | return ok; |
fa5b1830 | 1216 | } |
2bf68ed5 DT |
1217 | |
1218 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1219 | { | |
1220 | struct object_id oid; | |
1221 | int flag; | |
1222 | ||
1223 | if (submodule) { | |
1224 | if (resolve_gitlink_ref(submodule, "HEAD", oid.hash) == 0) | |
1225 | return fn("HEAD", &oid, 0, cb_data); | |
1226 | ||
1227 | return 0; | |
1228 | } | |
1229 | ||
1230 | if (!read_ref_full("HEAD", RESOLVE_REF_READING, oid.hash, &flag)) | |
1231 | return fn("HEAD", &oid, flag, cb_data); | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | int head_ref(each_ref_fn fn, void *cb_data) | |
1237 | { | |
1238 | return head_ref_submodule(NULL, fn, cb_data); | |
1239 | } | |
93770590 | 1240 | |
4c4de895 MH |
1241 | /* |
1242 | * Call fn for each reference in the specified submodule for which the | |
1243 | * refname begins with prefix. If trim is non-zero, then trim that | |
1244 | * many characters off the beginning of each refname before passing | |
1245 | * the refname to fn. flags can be DO_FOR_EACH_INCLUDE_BROKEN to | |
1246 | * include broken references in the iteration. If fn ever returns a | |
1247 | * non-zero value, stop the iteration and return that value; | |
1248 | * otherwise, return 0. | |
1249 | */ | |
7d2df051 | 1250 | static int do_for_each_ref(struct ref_store *refs, const char *prefix, |
4c4de895 MH |
1251 | each_ref_fn fn, int trim, int flags, void *cb_data) |
1252 | { | |
1253 | struct ref_iterator *iter; | |
1254 | ||
00eebe35 MH |
1255 | if (!refs) |
1256 | return 0; | |
1257 | ||
1a769003 | 1258 | iter = refs->be->iterator_begin(refs, prefix, flags); |
4c4de895 MH |
1259 | iter = prefix_ref_iterator_begin(iter, prefix, trim); |
1260 | ||
1261 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1262 | } | |
1263 | ||
7d2df051 NTND |
1264 | int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
1265 | { | |
1266 | return do_for_each_ref(refs, "", fn, 0, 0, cb_data); | |
1267 | } | |
1268 | ||
93770590 DT |
1269 | int for_each_ref(each_ref_fn fn, void *cb_data) |
1270 | { | |
7d2df051 | 1271 | return refs_for_each_ref(get_main_ref_store(), fn, cb_data); |
93770590 DT |
1272 | } |
1273 | ||
1274 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1275 | { | |
7d2df051 NTND |
1276 | return refs_for_each_ref(get_submodule_ref_store(submodule), fn, cb_data); |
1277 | } | |
1278 | ||
1279 | int refs_for_each_ref_in(struct ref_store *refs, const char *prefix, | |
1280 | each_ref_fn fn, void *cb_data) | |
1281 | { | |
1282 | return do_for_each_ref(refs, prefix, fn, strlen(prefix), 0, cb_data); | |
93770590 DT |
1283 | } |
1284 | ||
1285 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) | |
1286 | { | |
7d2df051 | 1287 | return refs_for_each_ref_in(get_main_ref_store(), prefix, fn, cb_data); |
93770590 DT |
1288 | } |
1289 | ||
1290 | int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken) | |
1291 | { | |
1292 | unsigned int flag = 0; | |
1293 | ||
1294 | if (broken) | |
1295 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
7d2df051 NTND |
1296 | return do_for_each_ref(get_main_ref_store(), |
1297 | prefix, fn, 0, flag, cb_data); | |
93770590 DT |
1298 | } |
1299 | ||
1300 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, | |
7d2df051 | 1301 | each_ref_fn fn, void *cb_data) |
93770590 | 1302 | { |
7d2df051 NTND |
1303 | return refs_for_each_ref_in(get_submodule_ref_store(submodule), |
1304 | prefix, fn, cb_data); | |
93770590 DT |
1305 | } |
1306 | ||
1307 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) | |
1308 | { | |
7d2df051 NTND |
1309 | return do_for_each_ref(get_main_ref_store(), |
1310 | git_replace_ref_base, fn, | |
1311 | strlen(git_replace_ref_base), | |
1312 | 0, cb_data); | |
93770590 DT |
1313 | } |
1314 | ||
1315 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
1316 | { | |
1317 | struct strbuf buf = STRBUF_INIT; | |
1318 | int ret; | |
1319 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
7d2df051 NTND |
1320 | ret = do_for_each_ref(get_main_ref_store(), |
1321 | buf.buf, fn, 0, 0, cb_data); | |
93770590 DT |
1322 | strbuf_release(&buf); |
1323 | return ret; | |
1324 | } | |
1325 | ||
7d2df051 | 1326 | int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
93770590 | 1327 | { |
7d2df051 | 1328 | return do_for_each_ref(refs, "", fn, 0, |
93770590 DT |
1329 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); |
1330 | } | |
2d0663b2 | 1331 | |
7d2df051 NTND |
1332 | int for_each_rawref(each_ref_fn fn, void *cb_data) |
1333 | { | |
1334 | return refs_for_each_rawref(get_main_ref_store(), fn, cb_data); | |
1335 | } | |
1336 | ||
2d0663b2 | 1337 | /* This function needs to return a meaningful errno on failure */ |
7d2df051 | 1338 | const char *refs_resolve_ref_unsafe(struct ref_store *refs, |
3c0cb0cb MH |
1339 | const char *refname, |
1340 | int resolve_flags, | |
1341 | unsigned char *sha1, int *flags) | |
2d0663b2 DT |
1342 | { |
1343 | static struct strbuf sb_refname = STRBUF_INIT; | |
1344 | int unused_flags; | |
1345 | int symref_count; | |
1346 | ||
1347 | if (!flags) | |
1348 | flags = &unused_flags; | |
1349 | ||
1350 | *flags = 0; | |
1351 | ||
1352 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1353 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1354 | !refname_is_safe(refname)) { | |
1355 | errno = EINVAL; | |
1356 | return NULL; | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * dwim_ref() uses REF_ISBROKEN to distinguish between | |
1361 | * missing refs and refs that were present but invalid, | |
1362 | * to complain about the latter to stderr. | |
1363 | * | |
1364 | * We don't know whether the ref exists, so don't set | |
1365 | * REF_ISBROKEN yet. | |
1366 | */ | |
1367 | *flags |= REF_BAD_NAME; | |
1368 | } | |
1369 | ||
1370 | for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) { | |
1371 | unsigned int read_flags = 0; | |
1372 | ||
e1e33b72 MH |
1373 | if (refs->be->read_raw_ref(refs, refname, |
1374 | sha1, &sb_refname, &read_flags)) { | |
2d0663b2 DT |
1375 | *flags |= read_flags; |
1376 | if (errno != ENOENT || (resolve_flags & RESOLVE_REF_READING)) | |
1377 | return NULL; | |
1378 | hashclr(sha1); | |
1379 | if (*flags & REF_BAD_NAME) | |
1380 | *flags |= REF_ISBROKEN; | |
1381 | return refname; | |
1382 | } | |
1383 | ||
1384 | *flags |= read_flags; | |
1385 | ||
1386 | if (!(read_flags & REF_ISSYMREF)) { | |
1387 | if (*flags & REF_BAD_NAME) { | |
1388 | hashclr(sha1); | |
1389 | *flags |= REF_ISBROKEN; | |
1390 | } | |
1391 | return refname; | |
1392 | } | |
1393 | ||
1394 | refname = sb_refname.buf; | |
1395 | if (resolve_flags & RESOLVE_REF_NO_RECURSE) { | |
1396 | hashclr(sha1); | |
1397 | return refname; | |
1398 | } | |
1399 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1400 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1401 | !refname_is_safe(refname)) { | |
1402 | errno = EINVAL; | |
1403 | return NULL; | |
1404 | } | |
1405 | ||
1406 | *flags |= REF_ISBROKEN | REF_BAD_NAME; | |
1407 | } | |
1408 | } | |
1409 | ||
1410 | errno = ELOOP; | |
1411 | return NULL; | |
1412 | } | |
00eebe35 | 1413 | |
6fb5acfd DT |
1414 | /* backend functions */ |
1415 | int refs_init_db(struct strbuf *err) | |
1416 | { | |
077be78d | 1417 | struct ref_store *refs = get_main_ref_store(); |
6fb5acfd DT |
1418 | |
1419 | return refs->be->init_db(refs, err); | |
1420 | } | |
1421 | ||
bd40dcda MH |
1422 | const char *resolve_ref_unsafe(const char *refname, int resolve_flags, |
1423 | unsigned char *sha1, int *flags) | |
1424 | { | |
7d2df051 | 1425 | return refs_resolve_ref_unsafe(get_main_ref_store(), refname, |
bd40dcda MH |
1426 | resolve_flags, sha1, flags); |
1427 | } | |
1428 | ||
a8355bb7 MH |
1429 | int resolve_gitlink_ref(const char *submodule, const char *refname, |
1430 | unsigned char *sha1) | |
424dcc76 | 1431 | { |
a8355bb7 | 1432 | size_t len = strlen(submodule); |
424dcc76 MH |
1433 | struct ref_store *refs; |
1434 | int flags; | |
1435 | ||
a8355bb7 | 1436 | while (len && submodule[len - 1] == '/') |
424dcc76 | 1437 | len--; |
48a8475f | 1438 | |
424dcc76 MH |
1439 | if (!len) |
1440 | return -1; | |
1441 | ||
a8355bb7 | 1442 | if (submodule[len]) { |
48a8475f | 1443 | /* We need to strip off one or more trailing slashes */ |
a8355bb7 | 1444 | char *stripped = xmemdupz(submodule, len); |
48a8475f | 1445 | |
18d0002d | 1446 | refs = get_submodule_ref_store(stripped); |
48a8475f MH |
1447 | free(stripped); |
1448 | } else { | |
18d0002d | 1449 | refs = get_submodule_ref_store(submodule); |
48a8475f MH |
1450 | } |
1451 | ||
424dcc76 MH |
1452 | if (!refs) |
1453 | return -1; | |
1454 | ||
7d2df051 | 1455 | if (!refs_resolve_ref_unsafe(refs, refname, 0, sha1, &flags) || |
424dcc76 MH |
1456 | is_null_sha1(sha1)) |
1457 | return -1; | |
1458 | return 0; | |
1459 | } | |
1460 | ||
7d4558c4 MH |
1461 | struct submodule_hash_entry |
1462 | { | |
1463 | struct hashmap_entry ent; /* must be the first member! */ | |
1464 | ||
1465 | struct ref_store *refs; | |
1466 | ||
1467 | /* NUL-terminated name of submodule: */ | |
1468 | char submodule[FLEX_ARRAY]; | |
1469 | }; | |
1470 | ||
1471 | static int submodule_hash_cmp(const void *entry, const void *entry_or_key, | |
1472 | const void *keydata) | |
1473 | { | |
1474 | const struct submodule_hash_entry *e1 = entry, *e2 = entry_or_key; | |
1475 | const char *submodule = keydata ? keydata : e2->submodule; | |
1476 | ||
1477 | return strcmp(e1->submodule, submodule); | |
1478 | } | |
1479 | ||
1480 | static struct submodule_hash_entry *alloc_submodule_hash_entry( | |
1481 | const char *submodule, struct ref_store *refs) | |
1482 | { | |
1483 | struct submodule_hash_entry *entry; | |
1484 | ||
1485 | FLEX_ALLOC_STR(entry, submodule, submodule); | |
1486 | hashmap_entry_init(entry, strhash(submodule)); | |
1487 | entry->refs = refs; | |
1488 | return entry; | |
1489 | } | |
1490 | ||
00eebe35 MH |
1491 | /* A pointer to the ref_store for the main repository: */ |
1492 | static struct ref_store *main_ref_store; | |
1493 | ||
7d4558c4 MH |
1494 | /* A hashmap of ref_stores, stored by submodule name: */ |
1495 | static struct hashmap submodule_ref_stores; | |
00eebe35 | 1496 | |
c468da4e | 1497 | /* |
9476c6ed NTND |
1498 | * Return the ref_store instance for the specified submodule. If that |
1499 | * ref_store hasn't been initialized yet, return NULL. | |
c468da4e | 1500 | */ |
9476c6ed | 1501 | static struct ref_store *lookup_submodule_ref_store(const char *submodule) |
00eebe35 | 1502 | { |
7d4558c4 | 1503 | struct submodule_hash_entry *entry; |
00eebe35 | 1504 | |
7d4558c4 MH |
1505 | if (!submodule_ref_stores.tablesize) |
1506 | /* It's initialized on demand in register_ref_store(). */ | |
1507 | return NULL; | |
620a66b9 | 1508 | |
7d4558c4 MH |
1509 | entry = hashmap_get_from_hash(&submodule_ref_stores, |
1510 | strhash(submodule), submodule); | |
1511 | return entry ? entry->refs : NULL; | |
00eebe35 MH |
1512 | } |
1513 | ||
c468da4e MH |
1514 | /* |
1515 | * Create, record, and return a ref_store instance for the specified | |
5d0bc90e | 1516 | * gitdir. |
c468da4e | 1517 | */ |
9e7ec634 NTND |
1518 | static struct ref_store *ref_store_init(const char *gitdir, |
1519 | unsigned int flags) | |
00eebe35 MH |
1520 | { |
1521 | const char *be_name = "files"; | |
1522 | struct ref_storage_be *be = find_ref_storage_backend(be_name); | |
ba88add5 | 1523 | struct ref_store *refs; |
00eebe35 MH |
1524 | |
1525 | if (!be) | |
1526 | die("BUG: reference backend %s is unknown", be_name); | |
1527 | ||
9e7ec634 | 1528 | refs = be->init(gitdir, flags); |
ba88add5 | 1529 | return refs; |
00eebe35 MH |
1530 | } |
1531 | ||
077be78d | 1532 | struct ref_store *get_main_ref_store(void) |
24c8407e NTND |
1533 | { |
1534 | if (main_ref_store) | |
1535 | return main_ref_store; | |
1536 | ||
9e7ec634 NTND |
1537 | main_ref_store = ref_store_init(get_git_dir(), |
1538 | (REF_STORE_READ | | |
1539 | REF_STORE_WRITE | | |
1540 | REF_STORE_ODB | | |
1541 | REF_STORE_MAIN)); | |
378dc910 NTND |
1542 | return main_ref_store; |
1543 | } | |
1544 | ||
1545 | /* | |
1546 | * Register the specified ref_store to be the one that should be used | |
1547 | * for submodule. It is a fatal error to call this function twice for | |
1548 | * the same submodule. | |
1549 | */ | |
1550 | static void register_submodule_ref_store(struct ref_store *refs, | |
1551 | const char *submodule) | |
1552 | { | |
1553 | if (!submodule_ref_stores.tablesize) | |
1554 | hashmap_init(&submodule_ref_stores, submodule_hash_cmp, 0); | |
1555 | ||
1556 | if (hashmap_put(&submodule_ref_stores, | |
1557 | alloc_submodule_hash_entry(submodule, refs))) | |
1558 | die("BUG: ref_store for submodule '%s' initialized twice", | |
1559 | submodule); | |
24c8407e NTND |
1560 | } |
1561 | ||
18d0002d | 1562 | struct ref_store *get_submodule_ref_store(const char *submodule) |
00eebe35 | 1563 | { |
126c9e05 | 1564 | struct strbuf submodule_sb = STRBUF_INIT; |
00eebe35 | 1565 | struct ref_store *refs; |
126c9e05 | 1566 | int ret; |
00eebe35 MH |
1567 | |
1568 | if (!submodule || !*submodule) { | |
18d0002d NTND |
1569 | /* |
1570 | * FIXME: This case is ideally not allowed. But that | |
1571 | * can't happen until we clean up all the callers. | |
1572 | */ | |
24c8407e | 1573 | return get_main_ref_store(); |
126c9e05 | 1574 | } |
00eebe35 | 1575 | |
126c9e05 NTND |
1576 | refs = lookup_submodule_ref_store(submodule); |
1577 | if (refs) | |
1578 | return refs; | |
00eebe35 | 1579 | |
126c9e05 NTND |
1580 | strbuf_addstr(&submodule_sb, submodule); |
1581 | ret = is_nonbare_repository_dir(&submodule_sb); | |
1582 | strbuf_release(&submodule_sb); | |
1583 | if (!ret) | |
1584 | return NULL; | |
00eebe35 | 1585 | |
5d0bc90e NTND |
1586 | ret = submodule_to_gitdir(&submodule_sb, submodule); |
1587 | if (ret) { | |
1588 | strbuf_release(&submodule_sb); | |
1589 | return NULL; | |
00eebe35 MH |
1590 | } |
1591 | ||
9e7ec634 NTND |
1592 | /* assume that add_submodule_odb() has been called */ |
1593 | refs = ref_store_init(submodule_sb.buf, | |
1594 | REF_STORE_READ | REF_STORE_ODB); | |
378dc910 | 1595 | register_submodule_ref_store(refs, submodule); |
5d0bc90e NTND |
1596 | |
1597 | strbuf_release(&submodule_sb); | |
00eebe35 MH |
1598 | return refs; |
1599 | } | |
1600 | ||
620a66b9 | 1601 | void base_ref_store_init(struct ref_store *refs, |
fbfd0a29 | 1602 | const struct ref_storage_be *be) |
00eebe35 | 1603 | { |
620a66b9 | 1604 | refs->be = be; |
00eebe35 | 1605 | } |
127b42a1 RS |
1606 | |
1607 | /* backend functions */ | |
7d2df051 | 1608 | int refs_pack_refs(struct ref_store *refs, unsigned int flags) |
8231527e | 1609 | { |
8231527e MH |
1610 | return refs->be->pack_refs(refs, flags); |
1611 | } | |
1612 | ||
7d2df051 NTND |
1613 | int refs_peel_ref(struct ref_store *refs, const char *refname, |
1614 | unsigned char *sha1) | |
1615 | { | |
1616 | return refs->be->peel_ref(refs, refname, sha1); | |
8231527e MH |
1617 | } |
1618 | ||
bd427cf2 MH |
1619 | int peel_ref(const char *refname, unsigned char *sha1) |
1620 | { | |
7d2df051 NTND |
1621 | return refs_peel_ref(get_main_ref_store(), refname, sha1); |
1622 | } | |
bd427cf2 | 1623 | |
7d2df051 NTND |
1624 | int refs_create_symref(struct ref_store *refs, |
1625 | const char *ref_target, | |
1626 | const char *refs_heads_master, | |
1627 | const char *logmsg) | |
1628 | { | |
1629 | return refs->be->create_symref(refs, ref_target, | |
1630 | refs_heads_master, | |
1631 | logmsg); | |
bd427cf2 MH |
1632 | } |
1633 | ||
284689ba MH |
1634 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1635 | const char *logmsg) | |
1636 | { | |
7d2df051 NTND |
1637 | return refs_create_symref(get_main_ref_store(), ref_target, |
1638 | refs_heads_master, logmsg); | |
284689ba MH |
1639 | } |
1640 | ||
127b42a1 RS |
1641 | int ref_transaction_commit(struct ref_transaction *transaction, |
1642 | struct strbuf *err) | |
1643 | { | |
c0fe4e8b | 1644 | struct ref_store *refs = transaction->ref_store; |
127b42a1 RS |
1645 | |
1646 | return refs->be->transaction_commit(refs, transaction, err); | |
1647 | } | |
62665823 | 1648 | |
7d2df051 NTND |
1649 | int refs_verify_refname_available(struct ref_store *refs, |
1650 | const char *refname, | |
1651 | const struct string_list *extra, | |
1652 | const struct string_list *skip, | |
1653 | struct strbuf *err) | |
62665823 | 1654 | { |
62665823 MH |
1655 | return refs->be->verify_refname_available(refs, refname, extra, skip, err); |
1656 | } | |
e3688bd6 | 1657 | |
7d2df051 | 1658 | int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data) |
e3688bd6 | 1659 | { |
e3688bd6 DT |
1660 | struct ref_iterator *iter; |
1661 | ||
1662 | iter = refs->be->reflog_iterator_begin(refs); | |
1663 | ||
1664 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1665 | } | |
1666 | ||
7d2df051 | 1667 | int for_each_reflog(each_ref_fn fn, void *cb_data) |
e3688bd6 | 1668 | { |
7d2df051 NTND |
1669 | return refs_for_each_reflog(get_main_ref_store(), fn, cb_data); |
1670 | } | |
e3688bd6 | 1671 | |
7d2df051 NTND |
1672 | int refs_for_each_reflog_ent_reverse(struct ref_store *refs, |
1673 | const char *refname, | |
1674 | each_reflog_ent_fn fn, | |
1675 | void *cb_data) | |
1676 | { | |
e3688bd6 DT |
1677 | return refs->be->for_each_reflog_ent_reverse(refs, refname, |
1678 | fn, cb_data); | |
1679 | } | |
1680 | ||
7d2df051 NTND |
1681 | int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, |
1682 | void *cb_data) | |
1683 | { | |
1684 | return refs_for_each_reflog_ent_reverse(get_main_ref_store(), | |
1685 | refname, fn, cb_data); | |
1686 | } | |
1687 | ||
1688 | int refs_for_each_reflog_ent(struct ref_store *refs, const char *refname, | |
1689 | each_reflog_ent_fn fn, void *cb_data) | |
1690 | { | |
1691 | return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data); | |
1692 | } | |
1693 | ||
e3688bd6 DT |
1694 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, |
1695 | void *cb_data) | |
1696 | { | |
7d2df051 NTND |
1697 | return refs_for_each_reflog_ent(get_main_ref_store(), refname, |
1698 | fn, cb_data); | |
1699 | } | |
e3688bd6 | 1700 | |
7d2df051 NTND |
1701 | int refs_reflog_exists(struct ref_store *refs, const char *refname) |
1702 | { | |
1703 | return refs->be->reflog_exists(refs, refname); | |
e3688bd6 DT |
1704 | } |
1705 | ||
1706 | int reflog_exists(const char *refname) | |
1707 | { | |
7d2df051 NTND |
1708 | return refs_reflog_exists(get_main_ref_store(), refname); |
1709 | } | |
e3688bd6 | 1710 | |
7d2df051 NTND |
1711 | int refs_create_reflog(struct ref_store *refs, const char *refname, |
1712 | int force_create, struct strbuf *err) | |
1713 | { | |
1714 | return refs->be->create_reflog(refs, refname, force_create, err); | |
e3688bd6 DT |
1715 | } |
1716 | ||
1717 | int safe_create_reflog(const char *refname, int force_create, | |
1718 | struct strbuf *err) | |
1719 | { | |
7d2df051 NTND |
1720 | return refs_create_reflog(get_main_ref_store(), refname, |
1721 | force_create, err); | |
1722 | } | |
e3688bd6 | 1723 | |
7d2df051 NTND |
1724 | int refs_delete_reflog(struct ref_store *refs, const char *refname) |
1725 | { | |
1726 | return refs->be->delete_reflog(refs, refname); | |
e3688bd6 DT |
1727 | } |
1728 | ||
1729 | int delete_reflog(const char *refname) | |
1730 | { | |
7d2df051 NTND |
1731 | return refs_delete_reflog(get_main_ref_store(), refname); |
1732 | } | |
e3688bd6 | 1733 | |
7d2df051 NTND |
1734 | int refs_reflog_expire(struct ref_store *refs, |
1735 | const char *refname, const unsigned char *sha1, | |
1736 | unsigned int flags, | |
1737 | reflog_expiry_prepare_fn prepare_fn, | |
1738 | reflog_expiry_should_prune_fn should_prune_fn, | |
1739 | reflog_expiry_cleanup_fn cleanup_fn, | |
1740 | void *policy_cb_data) | |
1741 | { | |
1742 | return refs->be->reflog_expire(refs, refname, sha1, flags, | |
1743 | prepare_fn, should_prune_fn, | |
1744 | cleanup_fn, policy_cb_data); | |
e3688bd6 DT |
1745 | } |
1746 | ||
1747 | int reflog_expire(const char *refname, const unsigned char *sha1, | |
1748 | unsigned int flags, | |
1749 | reflog_expiry_prepare_fn prepare_fn, | |
1750 | reflog_expiry_should_prune_fn should_prune_fn, | |
1751 | reflog_expiry_cleanup_fn cleanup_fn, | |
1752 | void *policy_cb_data) | |
1753 | { | |
7d2df051 NTND |
1754 | return refs_reflog_expire(get_main_ref_store(), |
1755 | refname, sha1, flags, | |
1756 | prepare_fn, should_prune_fn, | |
1757 | cleanup_fn, policy_cb_data); | |
e3688bd6 | 1758 | } |
fc681463 DT |
1759 | |
1760 | int initial_ref_transaction_commit(struct ref_transaction *transaction, | |
1761 | struct strbuf *err) | |
1762 | { | |
c0fe4e8b | 1763 | struct ref_store *refs = transaction->ref_store; |
fc681463 DT |
1764 | |
1765 | return refs->be->initial_transaction_commit(refs, transaction, err); | |
1766 | } | |
a27dcf89 | 1767 | |
7d2df051 NTND |
1768 | int refs_delete_refs(struct ref_store *refs, struct string_list *refnames, |
1769 | unsigned int flags) | |
a27dcf89 | 1770 | { |
a27dcf89 DT |
1771 | return refs->be->delete_refs(refs, refnames, flags); |
1772 | } | |
9b6b40d9 | 1773 | |
7d2df051 | 1774 | int delete_refs(struct string_list *refnames, unsigned int flags) |
9b6b40d9 | 1775 | { |
7d2df051 NTND |
1776 | return refs_delete_refs(get_main_ref_store(), refnames, flags); |
1777 | } | |
9b6b40d9 | 1778 | |
7d2df051 NTND |
1779 | int refs_rename_ref(struct ref_store *refs, const char *oldref, |
1780 | const char *newref, const char *logmsg) | |
1781 | { | |
9b6b40d9 DT |
1782 | return refs->be->rename_ref(refs, oldref, newref, logmsg); |
1783 | } | |
7d2df051 NTND |
1784 | |
1785 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) | |
1786 | { | |
1787 | return refs_rename_ref(get_main_ref_store(), oldref, newref, logmsg); | |
1788 | } |