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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" |
697cc8ef | 6 | #include "lockfile.h" |
85023577 | 7 | #include "refs.h" |
4cb77009 | 8 | #include "refs/refs-internal.h" |
cf0adba7 JH |
9 | #include "object.h" |
10 | #include "tag.h" | |
3581d793 | 11 | |
3dce444f RS |
12 | /* |
13 | * List of all available backends | |
14 | */ | |
15 | static struct ref_storage_be *refs_backends = &refs_be_files; | |
16 | ||
17 | static struct ref_storage_be *find_ref_storage_backend(const char *name) | |
18 | { | |
19 | struct ref_storage_be *be; | |
20 | for (be = refs_backends; be; be = be->next) | |
21 | if (!strcmp(be->name, name)) | |
22 | return be; | |
23 | return NULL; | |
24 | } | |
25 | ||
26 | int ref_storage_backend_exists(const char *name) | |
27 | { | |
28 | return find_ref_storage_backend(name) != NULL; | |
29 | } | |
30 | ||
bc5fd6d3 | 31 | /* |
dde8a902 DT |
32 | * How to handle various characters in refnames: |
33 | * 0: An acceptable character for refs | |
5e650228 JH |
34 | * 1: End-of-component |
35 | * 2: ., look for a preceding . to reject .. in refs | |
36 | * 3: {, look for a preceding @ to reject @{ in refs | |
53a8555e | 37 | * 4: A bad character: ASCII control characters, and |
cd377f45 JK |
38 | * ":", "?", "[", "\", "^", "~", SP, or TAB |
39 | * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set | |
dde8a902 DT |
40 | */ |
41 | static unsigned char refname_disposition[256] = { | |
5e650228 JH |
42 | 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
43 | 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
cd377f45 | 44 | 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1, |
5e650228 | 45 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4, |
dde8a902 | 46 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
5e650228 JH |
47 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0, |
48 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
49 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4 | |
dde8a902 DT |
50 | }; |
51 | ||
52 | /* | |
53 | * Try to read one refname component from the front of refname. | |
54 | * Return the length of the component found, or -1 if the component is | |
55 | * not legal. It is legal if it is something reasonable to have under | |
56 | * ".git/refs/"; We do not like it if: | |
bc5fd6d3 MH |
57 | * |
58 | * - any path component of it begins with ".", or | |
59 | * - it has double dots "..", or | |
53a8555e | 60 | * - it has ASCII control characters, or |
cd377f45 JK |
61 | * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or |
62 | * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or | |
53a8555e JK |
63 | * - it ends with a "/", or |
64 | * - it ends with ".lock", or | |
65 | * - it contains a "@{" portion | |
bc5fd6d3 | 66 | */ |
cd377f45 | 67 | static int check_refname_component(const char *refname, int *flags) |
bc5fd6d3 MH |
68 | { |
69 | const char *cp; | |
70 | char last = '\0'; | |
71 | ||
72 | for (cp = refname; ; cp++) { | |
dde8a902 DT |
73 | int ch = *cp & 255; |
74 | unsigned char disp = refname_disposition[ch]; | |
75 | switch (disp) { | |
5e650228 | 76 | case 1: |
dde8a902 | 77 | goto out; |
5e650228 | 78 | case 2: |
dde8a902 DT |
79 | if (last == '.') |
80 | return -1; /* Refname contains "..". */ | |
81 | break; | |
5e650228 | 82 | case 3: |
dde8a902 DT |
83 | if (last == '@') |
84 | return -1; /* Refname contains "@{". */ | |
bc5fd6d3 | 85 | break; |
5e650228 | 86 | case 4: |
dde8a902 | 87 | return -1; |
cd377f45 JK |
88 | case 5: |
89 | if (!(*flags & REFNAME_REFSPEC_PATTERN)) | |
90 | return -1; /* refspec can't be a pattern */ | |
91 | ||
92 | /* | |
93 | * Unset the pattern flag so that we only accept | |
94 | * a single asterisk for one side of refspec. | |
95 | */ | |
96 | *flags &= ~ REFNAME_REFSPEC_PATTERN; | |
97 | break; | |
dde8a902 | 98 | } |
bc5fd6d3 MH |
99 | last = ch; |
100 | } | |
dde8a902 | 101 | out: |
bc5fd6d3 | 102 | if (cp == refname) |
dac529e4 | 103 | return 0; /* Component has zero length. */ |
f3cc52d8 JN |
104 | if (refname[0] == '.') |
105 | return -1; /* Component starts with '.'. */ | |
7108ad23 MH |
106 | if (cp - refname >= LOCK_SUFFIX_LEN && |
107 | !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN)) | |
bc5fd6d3 MH |
108 | return -1; /* Refname ends with ".lock". */ |
109 | return cp - refname; | |
110 | } | |
111 | ||
5e650228 | 112 | int check_refname_format(const char *refname, int flags) |
bc5fd6d3 MH |
113 | { |
114 | int component_len, component_count = 0; | |
115 | ||
9ba89f48 FC |
116 | if (!strcmp(refname, "@")) |
117 | /* Refname is a single character '@'. */ | |
118 | return -1; | |
119 | ||
bc5fd6d3 MH |
120 | while (1) { |
121 | /* We are at the start of a path component. */ | |
cd377f45 JK |
122 | component_len = check_refname_component(refname, &flags); |
123 | if (component_len <= 0) | |
124 | return -1; | |
125 | ||
bc5fd6d3 MH |
126 | component_count++; |
127 | if (refname[component_len] == '\0') | |
128 | break; | |
129 | /* Skip to next component. */ | |
130 | refname += component_len + 1; | |
131 | } | |
132 | ||
133 | if (refname[component_len - 1] == '.') | |
134 | return -1; /* Refname ends with '.'. */ | |
135 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) | |
136 | return -1; /* Refname has only one component. */ | |
137 | return 0; | |
138 | } | |
139 | ||
4cb77009 | 140 | int refname_is_safe(const char *refname) |
d0f810f0 | 141 | { |
39950fef MH |
142 | const char *rest; |
143 | ||
144 | if (skip_prefix(refname, "refs/", &rest)) { | |
d0f810f0 RS |
145 | char *buf; |
146 | int result; | |
e40f3557 MH |
147 | size_t restlen = strlen(rest); |
148 | ||
149 | /* rest must not be empty, or start or end with "/" */ | |
150 | if (!restlen || *rest == '/' || rest[restlen - 1] == '/') | |
151 | return 0; | |
d0f810f0 | 152 | |
d0f810f0 RS |
153 | /* |
154 | * Does the refname try to escape refs/? | |
155 | * For example: refs/foo/../bar is safe but refs/foo/../../bar | |
156 | * is not. | |
157 | */ | |
e40f3557 MH |
158 | buf = xmallocz(restlen); |
159 | result = !normalize_path_copy(buf, rest) && !strcmp(buf, rest); | |
d0f810f0 RS |
160 | free(buf); |
161 | return result; | |
162 | } | |
35db25c6 MH |
163 | |
164 | do { | |
d0f810f0 RS |
165 | if (!isupper(*refname) && *refname != '_') |
166 | return 0; | |
167 | refname++; | |
35db25c6 | 168 | } while (*refname); |
d0f810f0 RS |
169 | return 1; |
170 | } | |
171 | ||
7bd9bcf3 MH |
172 | char *resolve_refdup(const char *refname, int resolve_flags, |
173 | unsigned char *sha1, int *flags) | |
e1e22e37 | 174 | { |
7bd9bcf3 MH |
175 | return xstrdup_or_null(resolve_ref_unsafe(refname, resolve_flags, |
176 | sha1, flags)); | |
cddc4258 MH |
177 | } |
178 | ||
7bd9bcf3 MH |
179 | /* The argument to filter_refs */ |
180 | struct ref_filter { | |
181 | const char *pattern; | |
182 | each_ref_fn *fn; | |
183 | void *cb_data; | |
184 | }; | |
432ad41e | 185 | |
7bd9bcf3 | 186 | int read_ref_full(const char *refname, int resolve_flags, unsigned char *sha1, int *flags) |
732134ed | 187 | { |
7bd9bcf3 MH |
188 | if (resolve_ref_unsafe(refname, resolve_flags, sha1, flags)) |
189 | return 0; | |
190 | return -1; | |
732134ed MH |
191 | } |
192 | ||
7bd9bcf3 | 193 | int read_ref(const char *refname, unsigned char *sha1) |
cddc4258 | 194 | { |
7bd9bcf3 | 195 | return read_ref_full(refname, RESOLVE_REF_READING, sha1, NULL); |
c774aab9 JP |
196 | } |
197 | ||
7bd9bcf3 | 198 | int ref_exists(const char *refname) |
bc5fd6d3 | 199 | { |
7bd9bcf3 MH |
200 | unsigned char sha1[20]; |
201 | return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, sha1, NULL); | |
bc5fd6d3 MH |
202 | } |
203 | ||
7bd9bcf3 MH |
204 | static int filter_refs(const char *refname, const struct object_id *oid, |
205 | int flags, void *data) | |
432ad41e | 206 | { |
7bd9bcf3 MH |
207 | struct ref_filter *filter = (struct ref_filter *)data; |
208 | ||
209 | if (wildmatch(filter->pattern, refname, 0, NULL)) | |
210 | return 0; | |
211 | return filter->fn(refname, oid, flags, filter->cb_data); | |
432ad41e MH |
212 | } |
213 | ||
7bd9bcf3 | 214 | enum peel_status peel_object(const unsigned char *name, unsigned char *sha1) |
c774aab9 | 215 | { |
7bd9bcf3 | 216 | struct object *o = lookup_unknown_object(name); |
c774aab9 | 217 | |
7bd9bcf3 MH |
218 | if (o->type == OBJ_NONE) { |
219 | int type = sha1_object_info(name, NULL); | |
220 | if (type < 0 || !object_as_type(o, type, 0)) | |
221 | return PEEL_INVALID; | |
222 | } | |
bc5fd6d3 | 223 | |
7bd9bcf3 MH |
224 | if (o->type != OBJ_TAG) |
225 | return PEEL_NON_TAG; | |
e1980c9d | 226 | |
7bd9bcf3 MH |
227 | o = deref_tag_noverify(o); |
228 | if (!o) | |
229 | return PEEL_INVALID; | |
230 | ||
844a9ce4 | 231 | hashcpy(sha1, o->oid.hash); |
7bd9bcf3 | 232 | return PEEL_PEELED; |
e1980c9d JH |
233 | } |
234 | ||
7bd9bcf3 MH |
235 | struct warn_if_dangling_data { |
236 | FILE *fp; | |
237 | const char *refname; | |
238 | const struct string_list *refnames; | |
239 | const char *msg_fmt; | |
240 | }; | |
bc5fd6d3 | 241 | |
7bd9bcf3 MH |
242 | static int warn_if_dangling_symref(const char *refname, const struct object_id *oid, |
243 | int flags, void *cb_data) | |
244 | { | |
245 | struct warn_if_dangling_data *d = cb_data; | |
246 | const char *resolves_to; | |
247 | struct object_id junk; | |
bc5fd6d3 | 248 | |
7bd9bcf3 MH |
249 | if (!(flags & REF_ISSYMREF)) |
250 | return 0; | |
bc5fd6d3 | 251 | |
7bd9bcf3 MH |
252 | resolves_to = resolve_ref_unsafe(refname, 0, junk.hash, NULL); |
253 | if (!resolves_to | |
254 | || (d->refname | |
255 | ? strcmp(resolves_to, d->refname) | |
256 | : !string_list_has_string(d->refnames, resolves_to))) { | |
257 | return 0; | |
258 | } | |
bc5fd6d3 | 259 | |
7bd9bcf3 MH |
260 | fprintf(d->fp, d->msg_fmt, refname); |
261 | fputc('\n', d->fp); | |
262 | return 0; | |
bc5fd6d3 MH |
263 | } |
264 | ||
7bd9bcf3 | 265 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f348ac92 | 266 | { |
7bd9bcf3 MH |
267 | struct warn_if_dangling_data data; |
268 | ||
269 | data.fp = fp; | |
270 | data.refname = refname; | |
271 | data.refnames = NULL; | |
272 | data.msg_fmt = msg_fmt; | |
273 | for_each_rawref(warn_if_dangling_symref, &data); | |
f348ac92 MH |
274 | } |
275 | ||
7bd9bcf3 | 276 | void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames) |
432ad41e | 277 | { |
7bd9bcf3 | 278 | struct warn_if_dangling_data data; |
432ad41e | 279 | |
7bd9bcf3 MH |
280 | data.fp = fp; |
281 | data.refname = NULL; | |
282 | data.refnames = refnames; | |
283 | data.msg_fmt = msg_fmt; | |
284 | for_each_rawref(warn_if_dangling_symref, &data); | |
432ad41e MH |
285 | } |
286 | ||
7bd9bcf3 | 287 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 288 | { |
7bd9bcf3 | 289 | return for_each_ref_in("refs/tags/", fn, cb_data); |
432ad41e MH |
290 | } |
291 | ||
7bd9bcf3 | 292 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
506a760d | 293 | { |
7bd9bcf3 | 294 | return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data); |
432ad41e MH |
295 | } |
296 | ||
7bd9bcf3 | 297 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 298 | { |
7bd9bcf3 | 299 | return for_each_ref_in("refs/heads/", fn, cb_data); |
432ad41e MH |
300 | } |
301 | ||
7bd9bcf3 | 302 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
202a56a9 | 303 | { |
7bd9bcf3 | 304 | return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data); |
202a56a9 | 305 | } |
432ad41e | 306 | |
7bd9bcf3 | 307 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
e9c4c111 | 308 | { |
7bd9bcf3 | 309 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
202a56a9 MH |
310 | } |
311 | ||
7bd9bcf3 | 312 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
e9c4c111 | 313 | { |
7bd9bcf3 | 314 | return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data); |
662428f4 | 315 | } |
c774aab9 | 316 | |
7bd9bcf3 MH |
317 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
318 | { | |
319 | struct strbuf buf = STRBUF_INIT; | |
320 | int ret = 0; | |
321 | struct object_id oid; | |
322 | int flag; | |
c774aab9 | 323 | |
7bd9bcf3 MH |
324 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); |
325 | if (!read_ref_full(buf.buf, RESOLVE_REF_READING, oid.hash, &flag)) | |
326 | ret = fn(buf.buf, &oid, flag, cb_data); | |
327 | strbuf_release(&buf); | |
c774aab9 | 328 | |
7bd9bcf3 | 329 | return ret; |
e9c4c111 | 330 | } |
c774aab9 | 331 | |
7bd9bcf3 MH |
332 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
333 | const char *prefix, void *cb_data) | |
662428f4 | 334 | { |
7bd9bcf3 MH |
335 | struct strbuf real_pattern = STRBUF_INIT; |
336 | struct ref_filter filter; | |
337 | int ret; | |
d08bae7e | 338 | |
59556548 | 339 | if (!prefix && !starts_with(pattern, "refs/")) |
d08bae7e | 340 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
341 | else if (prefix) |
342 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
343 | strbuf_addstr(&real_pattern, pattern); |
344 | ||
894a9d33 | 345 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 346 | /* Append implied '/' '*' if not present. */ |
00b6c178 | 347 | strbuf_complete(&real_pattern, '/'); |
d08bae7e IL |
348 | /* No need to check for '*', there is none. */ |
349 | strbuf_addch(&real_pattern, '*'); | |
350 | } | |
351 | ||
352 | filter.pattern = real_pattern.buf; | |
353 | filter.fn = fn; | |
354 | filter.cb_data = cb_data; | |
355 | ret = for_each_ref(filter_refs, &filter); | |
356 | ||
357 | strbuf_release(&real_pattern); | |
358 | return ret; | |
359 | } | |
360 | ||
b09fe971 IL |
361 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
362 | { | |
363 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
364 | } | |
365 | ||
4577e483 | 366 | const char *prettify_refname(const char *name) |
a9c37a72 | 367 | { |
a9c37a72 | 368 | return name + ( |
59556548 CC |
369 | starts_with(name, "refs/heads/") ? 11 : |
370 | starts_with(name, "refs/tags/") ? 10 : | |
371 | starts_with(name, "refs/remotes/") ? 13 : | |
a9c37a72 DB |
372 | 0); |
373 | } | |
374 | ||
54457fe5 | 375 | static const char *ref_rev_parse_rules[] = { |
79803322 SP |
376 | "%.*s", |
377 | "refs/%.*s", | |
378 | "refs/tags/%.*s", | |
379 | "refs/heads/%.*s", | |
380 | "refs/remotes/%.*s", | |
381 | "refs/remotes/%.*s/HEAD", | |
382 | NULL | |
383 | }; | |
384 | ||
54457fe5 | 385 | int refname_match(const char *abbrev_name, const char *full_name) |
79803322 SP |
386 | { |
387 | const char **p; | |
388 | const int abbrev_name_len = strlen(abbrev_name); | |
389 | ||
54457fe5 | 390 | for (p = ref_rev_parse_rules; *p; p++) { |
79803322 SP |
391 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { |
392 | return 1; | |
393 | } | |
394 | } | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
ff74f7f1 JH |
399 | /* |
400 | * *string and *len will only be substituted, and *string returned (for | |
401 | * later free()ing) if the string passed in is a magic short-hand form | |
402 | * to name a branch. | |
403 | */ | |
404 | static char *substitute_branch_name(const char **string, int *len) | |
405 | { | |
406 | struct strbuf buf = STRBUF_INIT; | |
cf99a761 | 407 | int ret = interpret_branch_name(*string, *len, &buf); |
ff74f7f1 JH |
408 | |
409 | if (ret == *len) { | |
410 | size_t size; | |
411 | *string = strbuf_detach(&buf, &size); | |
412 | *len = size; | |
413 | return (char *)*string; | |
414 | } | |
415 | ||
416 | return NULL; | |
417 | } | |
418 | ||
419 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
420 | { | |
421 | char *last_branch = substitute_branch_name(&str, &len); | |
41da7111 NTND |
422 | int refs_found = expand_ref(str, len, sha1, ref); |
423 | free(last_branch); | |
424 | return refs_found; | |
425 | } | |
426 | ||
427 | int expand_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
428 | { | |
ff74f7f1 JH |
429 | const char **p, *r; |
430 | int refs_found = 0; | |
431 | ||
432 | *ref = NULL; | |
433 | for (p = ref_rev_parse_rules; *p; p++) { | |
434 | char fullref[PATH_MAX]; | |
435 | unsigned char sha1_from_ref[20]; | |
436 | unsigned char *this_result; | |
437 | int flag; | |
438 | ||
439 | this_result = refs_found ? sha1_from_ref : sha1; | |
440 | mksnpath(fullref, sizeof(fullref), *p, len, str); | |
7695d118 RS |
441 | r = resolve_ref_unsafe(fullref, RESOLVE_REF_READING, |
442 | this_result, &flag); | |
ff74f7f1 JH |
443 | if (r) { |
444 | if (!refs_found++) | |
445 | *ref = xstrdup(r); | |
446 | if (!warn_ambiguous_refs) | |
447 | break; | |
55956350 | 448 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) { |
ff74f7f1 | 449 | warning("ignoring dangling symref %s.", fullref); |
55956350 JH |
450 | } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) { |
451 | warning("ignoring broken ref %s.", fullref); | |
452 | } | |
ff74f7f1 | 453 | } |
ff74f7f1 JH |
454 | return refs_found; |
455 | } | |
456 | ||
457 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
458 | { | |
459 | char *last_branch = substitute_branch_name(&str, &len); | |
460 | const char **p; | |
461 | int logs_found = 0; | |
462 | ||
463 | *log = NULL; | |
464 | for (p = ref_rev_parse_rules; *p; p++) { | |
ff74f7f1 JH |
465 | unsigned char hash[20]; |
466 | char path[PATH_MAX]; | |
467 | const char *ref, *it; | |
468 | ||
469 | mksnpath(path, sizeof(path), *p, len, str); | |
7695d118 RS |
470 | ref = resolve_ref_unsafe(path, RESOLVE_REF_READING, |
471 | hash, NULL); | |
ff74f7f1 JH |
472 | if (!ref) |
473 | continue; | |
4da58835 | 474 | if (reflog_exists(path)) |
ff74f7f1 | 475 | it = path; |
4da58835 | 476 | else if (strcmp(ref, path) && reflog_exists(ref)) |
ff74f7f1 JH |
477 | it = ref; |
478 | else | |
479 | continue; | |
480 | if (!logs_found++) { | |
481 | *log = xstrdup(it); | |
482 | hashcpy(sha1, hash); | |
483 | } | |
7bd9bcf3 MH |
484 | if (!warn_ambiguous_refs) |
485 | break; | |
c0277d15 | 486 | } |
7bd9bcf3 MH |
487 | free(last_branch); |
488 | return logs_found; | |
2ddb5d17 BK |
489 | } |
490 | ||
266b1827 DT |
491 | static int is_per_worktree_ref(const char *refname) |
492 | { | |
ce414b33 DT |
493 | return !strcmp(refname, "HEAD") || |
494 | starts_with(refname, "refs/bisect/"); | |
266b1827 DT |
495 | } |
496 | ||
497 | static int is_pseudoref_syntax(const char *refname) | |
498 | { | |
499 | const char *c; | |
500 | ||
501 | for (c = refname; *c; c++) { | |
502 | if (!isupper(*c) && *c != '-' && *c != '_') | |
503 | return 0; | |
504 | } | |
505 | ||
506 | return 1; | |
507 | } | |
508 | ||
509 | enum ref_type ref_type(const char *refname) | |
510 | { | |
511 | if (is_per_worktree_ref(refname)) | |
512 | return REF_TYPE_PER_WORKTREE; | |
513 | if (is_pseudoref_syntax(refname)) | |
514 | return REF_TYPE_PSEUDOREF; | |
515 | return REF_TYPE_NORMAL; | |
516 | } | |
517 | ||
74ec19d4 DT |
518 | static int write_pseudoref(const char *pseudoref, const unsigned char *sha1, |
519 | const unsigned char *old_sha1, struct strbuf *err) | |
520 | { | |
521 | const char *filename; | |
522 | int fd; | |
523 | static struct lock_file lock; | |
524 | struct strbuf buf = STRBUF_INIT; | |
525 | int ret = -1; | |
526 | ||
527 | strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1)); | |
528 | ||
529 | filename = git_path("%s", pseudoref); | |
530 | fd = hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR); | |
531 | if (fd < 0) { | |
0568c8e9 | 532 | strbuf_addf(err, "could not open '%s' for writing: %s", |
74ec19d4 DT |
533 | filename, strerror(errno)); |
534 | return -1; | |
535 | } | |
536 | ||
537 | if (old_sha1) { | |
538 | unsigned char actual_old_sha1[20]; | |
2c3aed13 DT |
539 | |
540 | if (read_ref(pseudoref, actual_old_sha1)) | |
541 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 | 542 | if (hashcmp(actual_old_sha1, old_sha1)) { |
0568c8e9 | 543 | strbuf_addf(err, "unexpected sha1 when writing '%s'", pseudoref); |
74ec19d4 DT |
544 | rollback_lock_file(&lock); |
545 | goto done; | |
546 | } | |
547 | } | |
548 | ||
549 | if (write_in_full(fd, buf.buf, buf.len) != buf.len) { | |
0568c8e9 | 550 | strbuf_addf(err, "could not write to '%s'", filename); |
74ec19d4 DT |
551 | rollback_lock_file(&lock); |
552 | goto done; | |
553 | } | |
554 | ||
555 | commit_lock_file(&lock); | |
556 | ret = 0; | |
557 | done: | |
558 | strbuf_release(&buf); | |
559 | return ret; | |
560 | } | |
561 | ||
562 | static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1) | |
563 | { | |
564 | static struct lock_file lock; | |
565 | const char *filename; | |
566 | ||
567 | filename = git_path("%s", pseudoref); | |
568 | ||
569 | if (old_sha1 && !is_null_sha1(old_sha1)) { | |
570 | int fd; | |
571 | unsigned char actual_old_sha1[20]; | |
572 | ||
573 | fd = hold_lock_file_for_update(&lock, filename, | |
574 | LOCK_DIE_ON_ERROR); | |
575 | if (fd < 0) | |
576 | die_errno(_("Could not open '%s' for writing"), filename); | |
2c3aed13 DT |
577 | if (read_ref(pseudoref, actual_old_sha1)) |
578 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 DT |
579 | if (hashcmp(actual_old_sha1, old_sha1)) { |
580 | warning("Unexpected sha1 when deleting %s", pseudoref); | |
581 | rollback_lock_file(&lock); | |
582 | return -1; | |
a4c653df | 583 | } |
74ec19d4 DT |
584 | |
585 | unlink(filename); | |
586 | rollback_lock_file(&lock); | |
587 | } else { | |
588 | unlink(filename); | |
4bd18c43 | 589 | } |
a4c653df | 590 | |
4bd18c43 | 591 | return 0; |
95fc7512 | 592 | } |
d556fae2 | 593 | |
fc1c2168 MH |
594 | int delete_ref(const char *refname, const unsigned char *old_sha1, |
595 | unsigned int flags) | |
41b625b0 | 596 | { |
7521cc46 | 597 | struct ref_transaction *transaction; |
a4c653df | 598 | struct strbuf err = STRBUF_INIT; |
8b5157e4 | 599 | |
74ec19d4 | 600 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) |
080cc646 | 601 | return delete_pseudoref(refname, old_sha1); |
d48744d1 | 602 | |
7521cc46 RS |
603 | transaction = ref_transaction_begin(&err); |
604 | if (!transaction || | |
fc67a082 | 605 | ref_transaction_delete(transaction, refname, old_sha1, |
fb5a6bb6 | 606 | flags, NULL, &err) || |
db7516ab | 607 | ref_transaction_commit(transaction, &err)) { |
7521cc46 RS |
608 | error("%s", err.buf); |
609 | ref_transaction_free(transaction); | |
610 | strbuf_release(&err); | |
c0277d15 | 611 | return 1; |
41b625b0 | 612 | } |
7bd9bcf3 MH |
613 | ref_transaction_free(transaction); |
614 | strbuf_release(&err); | |
b531394d BC |
615 | return 0; |
616 | } | |
41b625b0 | 617 | |
4cb77009 | 618 | int copy_reflog_msg(char *buf, const char *msg) |
0ec29a47 JH |
619 | { |
620 | char *cp = buf; | |
621 | char c; | |
622 | int wasspace = 1; | |
8b5157e4 | 623 | |
0ec29a47 JH |
624 | *cp++ = '\t'; |
625 | while ((c = *msg++)) { | |
626 | if (wasspace && isspace(c)) | |
627 | continue; | |
628 | wasspace = isspace(c); | |
629 | if (wasspace) | |
630 | c = ' '; | |
631 | *cp++ = c; | |
a4c653df | 632 | } |
0ec29a47 JH |
633 | while (buf < cp && isspace(cp[-1])) |
634 | cp--; | |
635 | *cp++ = '\n'; | |
636 | return cp - buf; | |
637 | } | |
8b5157e4 | 638 | |
4cb77009 | 639 | int should_autocreate_reflog(const char *refname) |
4e2bef57 DT |
640 | { |
641 | if (!log_all_ref_updates) | |
642 | return 0; | |
643 | return starts_with(refname, "refs/heads/") || | |
644 | starts_with(refname, "refs/remotes/") || | |
645 | starts_with(refname, "refs/notes/") || | |
646 | !strcmp(refname, "HEAD"); | |
647 | } | |
648 | ||
e7e0f26e | 649 | int is_branch(const char *refname) |
c3b0dec5 | 650 | { |
59556548 | 651 | return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/"); |
41b625b0 NP |
652 | } |
653 | ||
4207ed28 RS |
654 | struct read_ref_at_cb { |
655 | const char *refname; | |
656 | unsigned long at_time; | |
657 | int cnt; | |
658 | int reccnt; | |
659 | unsigned char *sha1; | |
660 | int found_it; | |
661 | ||
662 | unsigned char osha1[20]; | |
663 | unsigned char nsha1[20]; | |
664 | int tz; | |
665 | unsigned long date; | |
666 | char **msg; | |
667 | unsigned long *cutoff_time; | |
668 | int *cutoff_tz; | |
669 | int *cutoff_cnt; | |
670 | }; | |
671 | ||
672 | static int read_ref_at_ent(unsigned char *osha1, unsigned char *nsha1, | |
673 | const char *email, unsigned long timestamp, int tz, | |
674 | const char *message, void *cb_data) | |
675 | { | |
676 | struct read_ref_at_cb *cb = cb_data; | |
677 | ||
678 | cb->reccnt++; | |
679 | cb->tz = tz; | |
680 | cb->date = timestamp; | |
681 | ||
682 | if (timestamp <= cb->at_time || cb->cnt == 0) { | |
683 | if (cb->msg) | |
684 | *cb->msg = xstrdup(message); | |
685 | if (cb->cutoff_time) | |
686 | *cb->cutoff_time = timestamp; | |
687 | if (cb->cutoff_tz) | |
688 | *cb->cutoff_tz = tz; | |
689 | if (cb->cutoff_cnt) | |
690 | *cb->cutoff_cnt = cb->reccnt - 1; | |
691 | /* | |
692 | * we have not yet updated cb->[n|o]sha1 so they still | |
693 | * hold the values for the previous record. | |
694 | */ | |
695 | if (!is_null_sha1(cb->osha1)) { | |
696 | hashcpy(cb->sha1, nsha1); | |
697 | if (hashcmp(cb->osha1, nsha1)) | |
698 | warning("Log for ref %s has gap after %s.", | |
a5481a6c | 699 | cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822))); |
4207ed28 RS |
700 | } |
701 | else if (cb->date == cb->at_time) | |
702 | hashcpy(cb->sha1, nsha1); | |
703 | else if (hashcmp(nsha1, cb->sha1)) | |
704 | warning("Log for ref %s unexpectedly ended on %s.", | |
705 | cb->refname, show_date(cb->date, cb->tz, | |
a5481a6c | 706 | DATE_MODE(RFC2822))); |
4207ed28 RS |
707 | hashcpy(cb->osha1, osha1); |
708 | hashcpy(cb->nsha1, nsha1); | |
709 | cb->found_it = 1; | |
710 | return 1; | |
711 | } | |
712 | hashcpy(cb->osha1, osha1); | |
713 | hashcpy(cb->nsha1, nsha1); | |
714 | if (cb->cnt > 0) | |
715 | cb->cnt--; | |
716 | return 0; | |
717 | } | |
718 | ||
719 | static int read_ref_at_ent_oldest(unsigned char *osha1, unsigned char *nsha1, | |
720 | const char *email, unsigned long timestamp, | |
721 | int tz, const char *message, void *cb_data) | |
722 | { | |
723 | struct read_ref_at_cb *cb = cb_data; | |
724 | ||
725 | if (cb->msg) | |
726 | *cb->msg = xstrdup(message); | |
727 | if (cb->cutoff_time) | |
728 | *cb->cutoff_time = timestamp; | |
729 | if (cb->cutoff_tz) | |
730 | *cb->cutoff_tz = tz; | |
731 | if (cb->cutoff_cnt) | |
732 | *cb->cutoff_cnt = cb->reccnt; | |
733 | hashcpy(cb->sha1, osha1); | |
734 | if (is_null_sha1(cb->sha1)) | |
735 | hashcpy(cb->sha1, nsha1); | |
736 | /* We just want the first entry */ | |
737 | return 1; | |
16d7cc90 JH |
738 | } |
739 | ||
c41a87dd | 740 | int read_ref_at(const char *refname, unsigned int flags, unsigned long at_time, int cnt, |
dfefa935 MH |
741 | unsigned char *sha1, char **msg, |
742 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 743 | { |
4207ed28 | 744 | struct read_ref_at_cb cb; |
d556fae2 | 745 | |
4207ed28 RS |
746 | memset(&cb, 0, sizeof(cb)); |
747 | cb.refname = refname; | |
748 | cb.at_time = at_time; | |
749 | cb.cnt = cnt; | |
750 | cb.msg = msg; | |
751 | cb.cutoff_time = cutoff_time; | |
752 | cb.cutoff_tz = cutoff_tz; | |
753 | cb.cutoff_cnt = cutoff_cnt; | |
754 | cb.sha1 = sha1; | |
755 | ||
756 | for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb); | |
757 | ||
c41a87dd DA |
758 | if (!cb.reccnt) { |
759 | if (flags & GET_SHA1_QUIETLY) | |
760 | exit(128); | |
761 | else | |
762 | die("Log for %s is empty.", refname); | |
763 | } | |
4207ed28 RS |
764 | if (cb.found_it) |
765 | return 0; | |
766 | ||
767 | for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb); | |
d556fae2 | 768 | |
16d7cc90 | 769 | return 1; |
d556fae2 | 770 | } |
2ff81662 | 771 | |
93a644ea | 772 | struct ref_transaction *ref_transaction_begin(struct strbuf *err) |
caa4046c | 773 | { |
5a603b04 JN |
774 | assert(err); |
775 | ||
caa4046c MH |
776 | return xcalloc(1, sizeof(struct ref_transaction)); |
777 | } | |
778 | ||
026bd1d3 | 779 | void ref_transaction_free(struct ref_transaction *transaction) |
caa4046c MH |
780 | { |
781 | int i; | |
782 | ||
1b07255c RS |
783 | if (!transaction) |
784 | return; | |
785 | ||
db7516ab RS |
786 | for (i = 0; i < transaction->nr; i++) { |
787 | free(transaction->updates[i]->msg); | |
88615910 | 788 | free(transaction->updates[i]); |
db7516ab | 789 | } |
caa4046c MH |
790 | free(transaction->updates); |
791 | free(transaction); | |
792 | } | |
793 | ||
71564516 MH |
794 | struct ref_update *ref_transaction_add_update( |
795 | struct ref_transaction *transaction, | |
796 | const char *refname, unsigned int flags, | |
797 | const unsigned char *new_sha1, | |
798 | const unsigned char *old_sha1, | |
799 | const char *msg) | |
caa4046c | 800 | { |
96ffc06f | 801 | struct ref_update *update; |
71564516 MH |
802 | |
803 | if (transaction->state != REF_TRANSACTION_OPEN) | |
804 | die("BUG: update called for transaction that is not open"); | |
805 | ||
806 | if ((flags & REF_ISPRUNING) && !(flags & REF_NODEREF)) | |
807 | die("BUG: REF_ISPRUNING set without REF_NODEREF"); | |
808 | ||
96ffc06f | 809 | FLEX_ALLOC_STR(update, refname, refname); |
caa4046c MH |
810 | ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc); |
811 | transaction->updates[transaction->nr++] = update; | |
71564516 MH |
812 | |
813 | update->flags = flags; | |
814 | ||
815 | if (flags & REF_HAVE_NEW) | |
816 | hashcpy(update->new_sha1, new_sha1); | |
817 | if (flags & REF_HAVE_OLD) | |
818 | hashcpy(update->old_sha1, old_sha1); | |
13092a91 | 819 | update->msg = xstrdup_or_null(msg); |
caa4046c MH |
820 | return update; |
821 | } | |
822 | ||
8e34800e RS |
823 | int ref_transaction_update(struct ref_transaction *transaction, |
824 | const char *refname, | |
825 | const unsigned char *new_sha1, | |
826 | const unsigned char *old_sha1, | |
1d147bdf | 827 | unsigned int flags, const char *msg, |
8e34800e | 828 | struct strbuf *err) |
caa4046c | 829 | { |
5a603b04 JN |
830 | assert(err); |
831 | ||
8a679de6 MH |
832 | if ((new_sha1 && !is_null_sha1(new_sha1)) ? |
833 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) : | |
834 | !refname_is_safe(refname)) { | |
0568c8e9 | 835 | strbuf_addf(err, "refusing to update ref with bad name '%s'", |
d0f810f0 RS |
836 | refname); |
837 | return -1; | |
838 | } | |
839 | ||
71564516 MH |
840 | flags |= (new_sha1 ? REF_HAVE_NEW : 0) | (old_sha1 ? REF_HAVE_OLD : 0); |
841 | ||
842 | ref_transaction_add_update(transaction, refname, flags, | |
843 | new_sha1, old_sha1, msg); | |
8e34800e | 844 | return 0; |
caa4046c MH |
845 | } |
846 | ||
b416af5b RS |
847 | int ref_transaction_create(struct ref_transaction *transaction, |
848 | const char *refname, | |
849 | const unsigned char *new_sha1, | |
fec14ec3 | 850 | unsigned int flags, const char *msg, |
b416af5b | 851 | struct strbuf *err) |
caa4046c | 852 | { |
f04c5b55 MH |
853 | if (!new_sha1 || is_null_sha1(new_sha1)) |
854 | die("BUG: create called without valid new_sha1"); | |
bc9f2925 | 855 | return ref_transaction_update(transaction, refname, new_sha1, |
1d147bdf | 856 | null_sha1, flags, msg, err); |
caa4046c MH |
857 | } |
858 | ||
8c8bdc0d RS |
859 | int ref_transaction_delete(struct ref_transaction *transaction, |
860 | const char *refname, | |
861 | const unsigned char *old_sha1, | |
fb5a6bb6 | 862 | unsigned int flags, const char *msg, |
8c8bdc0d | 863 | struct strbuf *err) |
caa4046c | 864 | { |
60294596 MH |
865 | if (old_sha1 && is_null_sha1(old_sha1)) |
866 | die("BUG: delete called with old_sha1 set to zeros"); | |
1d147bdf | 867 | return ref_transaction_update(transaction, refname, |
fb5a6bb6 | 868 | null_sha1, old_sha1, |
1d147bdf | 869 | flags, msg, err); |
caa4046c MH |
870 | } |
871 | ||
16180334 MH |
872 | int ref_transaction_verify(struct ref_transaction *transaction, |
873 | const char *refname, | |
874 | const unsigned char *old_sha1, | |
875 | unsigned int flags, | |
876 | struct strbuf *err) | |
877 | { | |
878 | if (!old_sha1) | |
879 | die("BUG: verify called with old_sha1 set to NULL"); | |
880 | return ref_transaction_update(transaction, refname, | |
881 | NULL, old_sha1, | |
882 | flags, NULL, err); | |
883 | } | |
884 | ||
8f6dc7e3 | 885 | int update_ref_oid(const char *msg, const char *refname, |
886 | const struct object_id *new_oid, const struct object_id *old_oid, | |
887 | unsigned int flags, enum action_on_err onerr) | |
888 | { | |
889 | return update_ref(msg, refname, new_oid ? new_oid->hash : NULL, | |
890 | old_oid ? old_oid->hash : NULL, flags, onerr); | |
891 | } | |
892 | ||
4b7b520b MH |
893 | int update_ref(const char *msg, const char *refname, |
894 | const unsigned char *new_sha1, const unsigned char *old_sha1, | |
fec14ec3 | 895 | unsigned int flags, enum action_on_err onerr) |
4738a333 | 896 | { |
74ec19d4 | 897 | struct ref_transaction *t = NULL; |
b4d75ac1 | 898 | struct strbuf err = STRBUF_INIT; |
74ec19d4 | 899 | int ret = 0; |
b4d75ac1 | 900 | |
74ec19d4 DT |
901 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { |
902 | ret = write_pseudoref(refname, new_sha1, old_sha1, &err); | |
903 | } else { | |
904 | t = ref_transaction_begin(&err); | |
905 | if (!t || | |
906 | ref_transaction_update(t, refname, new_sha1, old_sha1, | |
907 | flags, msg, &err) || | |
908 | ref_transaction_commit(t, &err)) { | |
909 | ret = 1; | |
910 | ref_transaction_free(t); | |
911 | } | |
912 | } | |
913 | if (ret) { | |
b4d75ac1 RS |
914 | const char *str = "update_ref failed for ref '%s': %s"; |
915 | ||
b4d75ac1 RS |
916 | switch (onerr) { |
917 | case UPDATE_REFS_MSG_ON_ERR: | |
918 | error(str, refname, err.buf); | |
919 | break; | |
920 | case UPDATE_REFS_DIE_ON_ERR: | |
921 | die(str, refname, err.buf); | |
922 | break; | |
923 | case UPDATE_REFS_QUIET_ON_ERR: | |
924 | break; | |
925 | } | |
926 | strbuf_release(&err); | |
4738a333 | 927 | return 1; |
b4d75ac1 RS |
928 | } |
929 | strbuf_release(&err); | |
74ec19d4 DT |
930 | if (t) |
931 | ref_transaction_free(t); | |
b4d75ac1 | 932 | return 0; |
4738a333 BK |
933 | } |
934 | ||
dfefa935 | 935 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
936 | { |
937 | int i; | |
938 | static char **scanf_fmts; | |
939 | static int nr_rules; | |
940 | char *short_name; | |
941 | ||
7c2b3029 | 942 | if (!nr_rules) { |
4346663a MH |
943 | /* |
944 | * Pre-generate scanf formats from ref_rev_parse_rules[]. | |
945 | * Generate a format suitable for scanf from a | |
946 | * ref_rev_parse_rules rule by interpolating "%s" at the | |
947 | * location of the "%.*s". | |
948 | */ | |
7c2b3029 | 949 | size_t total_len = 0; |
84d5633f | 950 | size_t offset = 0; |
7c2b3029 JK |
951 | |
952 | /* the rule list is NULL terminated, count them first */ | |
a4165851 | 953 | for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++) |
7902fe03 MH |
954 | /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */ |
955 | total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1; | |
7c2b3029 | 956 | |
50492f7b | 957 | scanf_fmts = xmalloc(st_add(st_mult(sizeof(char *), nr_rules), total_len)); |
7c2b3029 | 958 | |
84d5633f | 959 | offset = 0; |
7c2b3029 | 960 | for (i = 0; i < nr_rules; i++) { |
4346663a | 961 | assert(offset < total_len); |
84d5633f | 962 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset; |
4346663a MH |
963 | offset += snprintf(scanf_fmts[i], total_len - offset, |
964 | ref_rev_parse_rules[i], 2, "%s") + 1; | |
7c2b3029 JK |
965 | } |
966 | } | |
967 | ||
968 | /* bail out if there are no rules */ | |
969 | if (!nr_rules) | |
dfefa935 | 970 | return xstrdup(refname); |
7c2b3029 | 971 | |
dfefa935 MH |
972 | /* buffer for scanf result, at most refname must fit */ |
973 | short_name = xstrdup(refname); | |
7c2b3029 JK |
974 | |
975 | /* skip first rule, it will always match */ | |
976 | for (i = nr_rules - 1; i > 0 ; --i) { | |
977 | int j; | |
6e7b3309 | 978 | int rules_to_fail = i; |
7c2b3029 JK |
979 | int short_name_len; |
980 | ||
dfefa935 | 981 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
982 | continue; |
983 | ||
984 | short_name_len = strlen(short_name); | |
985 | ||
6e7b3309 BW |
986 | /* |
987 | * in strict mode, all (except the matched one) rules | |
988 | * must fail to resolve to a valid non-ambiguous ref | |
989 | */ | |
990 | if (strict) | |
991 | rules_to_fail = nr_rules; | |
992 | ||
7c2b3029 JK |
993 | /* |
994 | * check if the short name resolves to a valid ref, | |
995 | * but use only rules prior to the matched one | |
996 | */ | |
6e7b3309 | 997 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 998 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 JK |
999 | char refname[PATH_MAX]; |
1000 | ||
6e7b3309 BW |
1001 | /* skip matched rule */ |
1002 | if (i == j) | |
1003 | continue; | |
1004 | ||
7c2b3029 JK |
1005 | /* |
1006 | * the short name is ambiguous, if it resolves | |
1007 | * (with this previous rule) to a valid ref | |
1008 | * read_ref() returns 0 on success | |
1009 | */ | |
1010 | mksnpath(refname, sizeof(refname), | |
1011 | rule, short_name_len, short_name); | |
c6893323 | 1012 | if (ref_exists(refname)) |
7c2b3029 JK |
1013 | break; |
1014 | } | |
1015 | ||
1016 | /* | |
1017 | * short name is non-ambiguous if all previous rules | |
1018 | * haven't resolved to a valid ref | |
1019 | */ | |
6e7b3309 | 1020 | if (j == rules_to_fail) |
7c2b3029 JK |
1021 | return short_name; |
1022 | } | |
1023 | ||
1024 | free(short_name); | |
dfefa935 | 1025 | return xstrdup(refname); |
7c2b3029 | 1026 | } |
daebaa78 JH |
1027 | |
1028 | static struct string_list *hide_refs; | |
1029 | ||
1030 | int parse_hide_refs_config(const char *var, const char *value, const char *section) | |
1031 | { | |
1032 | if (!strcmp("transfer.hiderefs", var) || | |
1033 | /* NEEDSWORK: use parse_config_key() once both are merged */ | |
59556548 | 1034 | (starts_with(var, section) && var[strlen(section)] == '.' && |
daebaa78 JH |
1035 | !strcmp(var + strlen(section), ".hiderefs"))) { |
1036 | char *ref; | |
1037 | int len; | |
1038 | ||
1039 | if (!value) | |
1040 | return config_error_nonbool(var); | |
1041 | ref = xstrdup(value); | |
1042 | len = strlen(ref); | |
1043 | while (len && ref[len - 1] == '/') | |
1044 | ref[--len] = '\0'; | |
1045 | if (!hide_refs) { | |
1046 | hide_refs = xcalloc(1, sizeof(*hide_refs)); | |
1047 | hide_refs->strdup_strings = 1; | |
1048 | } | |
1049 | string_list_append(hide_refs, ref); | |
1050 | } | |
1051 | return 0; | |
1052 | } | |
1053 | ||
78a766ab | 1054 | int ref_is_hidden(const char *refname, const char *refname_full) |
daebaa78 | 1055 | { |
2bc31d16 | 1056 | int i; |
daebaa78 JH |
1057 | |
1058 | if (!hide_refs) | |
1059 | return 0; | |
2bc31d16 JK |
1060 | for (i = hide_refs->nr - 1; i >= 0; i--) { |
1061 | const char *match = hide_refs->items[i].string; | |
78a766ab | 1062 | const char *subject; |
2bc31d16 | 1063 | int neg = 0; |
daebaa78 | 1064 | int len; |
2bc31d16 JK |
1065 | |
1066 | if (*match == '!') { | |
1067 | neg = 1; | |
1068 | match++; | |
1069 | } | |
1070 | ||
78a766ab LF |
1071 | if (*match == '^') { |
1072 | subject = refname_full; | |
1073 | match++; | |
1074 | } else { | |
1075 | subject = refname; | |
1076 | } | |
1077 | ||
1078 | /* refname can be NULL when namespaces are used. */ | |
1079 | if (!subject || !starts_with(subject, match)) | |
daebaa78 | 1080 | continue; |
2bc31d16 | 1081 | len = strlen(match); |
78a766ab | 1082 | if (!subject[len] || subject[len] == '/') |
2bc31d16 | 1083 | return !neg; |
daebaa78 JH |
1084 | } |
1085 | return 0; | |
1086 | } | |
fa5b1830 | 1087 | |
0845122c DT |
1088 | const char *find_descendant_ref(const char *dirname, |
1089 | const struct string_list *extras, | |
1090 | const struct string_list *skip) | |
fa5b1830 | 1091 | { |
0845122c | 1092 | int pos; |
fa5b1830 | 1093 | |
0845122c DT |
1094 | if (!extras) |
1095 | return NULL; | |
fa5b1830 MH |
1096 | |
1097 | /* | |
0845122c DT |
1098 | * Look at the place where dirname would be inserted into |
1099 | * extras. If there is an entry at that position that starts | |
1100 | * with dirname (remember, dirname includes the trailing | |
1101 | * slash) and is not in skip, then we have a conflict. | |
fa5b1830 | 1102 | */ |
0845122c DT |
1103 | for (pos = string_list_find_insert_index(extras, dirname, 0); |
1104 | pos < extras->nr; pos++) { | |
1105 | const char *extra_refname = extras->items[pos].string; | |
fa5b1830 | 1106 | |
0845122c DT |
1107 | if (!starts_with(extra_refname, dirname)) |
1108 | break; | |
1109 | ||
1110 | if (!skip || !string_list_has_string(skip, extra_refname)) | |
1111 | return extra_refname; | |
fa5b1830 | 1112 | } |
0845122c DT |
1113 | return NULL; |
1114 | } | |
fa5b1830 | 1115 | |
ff3a299c | 1116 | int rename_ref_available(const char *old_refname, const char *new_refname) |
0845122c DT |
1117 | { |
1118 | struct string_list skip = STRING_LIST_INIT_NODUP; | |
1119 | struct strbuf err = STRBUF_INIT; | |
ff3a299c | 1120 | int ok; |
fa5b1830 | 1121 | |
ff3a299c DT |
1122 | string_list_insert(&skip, old_refname); |
1123 | ok = !verify_refname_available(new_refname, NULL, &skip, &err); | |
1124 | if (!ok) | |
0845122c DT |
1125 | error("%s", err.buf); |
1126 | ||
1127 | string_list_clear(&skip, 0); | |
1128 | strbuf_release(&err); | |
ff3a299c | 1129 | return ok; |
fa5b1830 | 1130 | } |
2bf68ed5 DT |
1131 | |
1132 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1133 | { | |
1134 | struct object_id oid; | |
1135 | int flag; | |
1136 | ||
1137 | if (submodule) { | |
1138 | if (resolve_gitlink_ref(submodule, "HEAD", oid.hash) == 0) | |
1139 | return fn("HEAD", &oid, 0, cb_data); | |
1140 | ||
1141 | return 0; | |
1142 | } | |
1143 | ||
1144 | if (!read_ref_full("HEAD", RESOLVE_REF_READING, oid.hash, &flag)) | |
1145 | return fn("HEAD", &oid, flag, cb_data); | |
1146 | ||
1147 | return 0; | |
1148 | } | |
1149 | ||
1150 | int head_ref(each_ref_fn fn, void *cb_data) | |
1151 | { | |
1152 | return head_ref_submodule(NULL, fn, cb_data); | |
1153 | } | |
93770590 | 1154 | |
4c4de895 MH |
1155 | /* |
1156 | * Call fn for each reference in the specified submodule for which the | |
1157 | * refname begins with prefix. If trim is non-zero, then trim that | |
1158 | * many characters off the beginning of each refname before passing | |
1159 | * the refname to fn. flags can be DO_FOR_EACH_INCLUDE_BROKEN to | |
1160 | * include broken references in the iteration. If fn ever returns a | |
1161 | * non-zero value, stop the iteration and return that value; | |
1162 | * otherwise, return 0. | |
1163 | */ | |
1164 | static int do_for_each_ref(const char *submodule, const char *prefix, | |
1165 | each_ref_fn fn, int trim, int flags, void *cb_data) | |
1166 | { | |
00eebe35 | 1167 | struct ref_store *refs = get_ref_store(submodule); |
4c4de895 MH |
1168 | struct ref_iterator *iter; |
1169 | ||
00eebe35 MH |
1170 | if (!refs) |
1171 | return 0; | |
1172 | ||
1a769003 | 1173 | iter = refs->be->iterator_begin(refs, prefix, flags); |
4c4de895 MH |
1174 | iter = prefix_ref_iterator_begin(iter, prefix, trim); |
1175 | ||
1176 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1177 | } | |
1178 | ||
93770590 DT |
1179 | int for_each_ref(each_ref_fn fn, void *cb_data) |
1180 | { | |
1181 | return do_for_each_ref(NULL, "", fn, 0, 0, cb_data); | |
1182 | } | |
1183 | ||
1184 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1185 | { | |
1186 | return do_for_each_ref(submodule, "", fn, 0, 0, cb_data); | |
1187 | } | |
1188 | ||
1189 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) | |
1190 | { | |
1191 | return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data); | |
1192 | } | |
1193 | ||
1194 | int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken) | |
1195 | { | |
1196 | unsigned int flag = 0; | |
1197 | ||
1198 | if (broken) | |
1199 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
1200 | return do_for_each_ref(NULL, prefix, fn, 0, flag, cb_data); | |
1201 | } | |
1202 | ||
1203 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, | |
1204 | each_ref_fn fn, void *cb_data) | |
1205 | { | |
1206 | return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data); | |
1207 | } | |
1208 | ||
1209 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) | |
1210 | { | |
1211 | return do_for_each_ref(NULL, git_replace_ref_base, fn, | |
1212 | strlen(git_replace_ref_base), 0, cb_data); | |
1213 | } | |
1214 | ||
1215 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
1216 | { | |
1217 | struct strbuf buf = STRBUF_INIT; | |
1218 | int ret; | |
1219 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
1220 | ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data); | |
1221 | strbuf_release(&buf); | |
1222 | return ret; | |
1223 | } | |
1224 | ||
1225 | int for_each_rawref(each_ref_fn fn, void *cb_data) | |
1226 | { | |
1227 | return do_for_each_ref(NULL, "", fn, 0, | |
1228 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
1229 | } | |
2d0663b2 DT |
1230 | |
1231 | /* This function needs to return a meaningful errno on failure */ | |
bd40dcda MH |
1232 | static const char *resolve_ref_recursively(struct ref_store *refs, |
1233 | const char *refname, | |
1234 | int resolve_flags, | |
1235 | unsigned char *sha1, int *flags) | |
2d0663b2 DT |
1236 | { |
1237 | static struct strbuf sb_refname = STRBUF_INIT; | |
1238 | int unused_flags; | |
1239 | int symref_count; | |
1240 | ||
1241 | if (!flags) | |
1242 | flags = &unused_flags; | |
1243 | ||
1244 | *flags = 0; | |
1245 | ||
1246 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1247 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1248 | !refname_is_safe(refname)) { | |
1249 | errno = EINVAL; | |
1250 | return NULL; | |
1251 | } | |
1252 | ||
1253 | /* | |
1254 | * dwim_ref() uses REF_ISBROKEN to distinguish between | |
1255 | * missing refs and refs that were present but invalid, | |
1256 | * to complain about the latter to stderr. | |
1257 | * | |
1258 | * We don't know whether the ref exists, so don't set | |
1259 | * REF_ISBROKEN yet. | |
1260 | */ | |
1261 | *flags |= REF_BAD_NAME; | |
1262 | } | |
1263 | ||
1264 | for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) { | |
1265 | unsigned int read_flags = 0; | |
1266 | ||
e1e33b72 MH |
1267 | if (refs->be->read_raw_ref(refs, refname, |
1268 | sha1, &sb_refname, &read_flags)) { | |
2d0663b2 DT |
1269 | *flags |= read_flags; |
1270 | if (errno != ENOENT || (resolve_flags & RESOLVE_REF_READING)) | |
1271 | return NULL; | |
1272 | hashclr(sha1); | |
1273 | if (*flags & REF_BAD_NAME) | |
1274 | *flags |= REF_ISBROKEN; | |
1275 | return refname; | |
1276 | } | |
1277 | ||
1278 | *flags |= read_flags; | |
1279 | ||
1280 | if (!(read_flags & REF_ISSYMREF)) { | |
1281 | if (*flags & REF_BAD_NAME) { | |
1282 | hashclr(sha1); | |
1283 | *flags |= REF_ISBROKEN; | |
1284 | } | |
1285 | return refname; | |
1286 | } | |
1287 | ||
1288 | refname = sb_refname.buf; | |
1289 | if (resolve_flags & RESOLVE_REF_NO_RECURSE) { | |
1290 | hashclr(sha1); | |
1291 | return refname; | |
1292 | } | |
1293 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1294 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1295 | !refname_is_safe(refname)) { | |
1296 | errno = EINVAL; | |
1297 | return NULL; | |
1298 | } | |
1299 | ||
1300 | *flags |= REF_ISBROKEN | REF_BAD_NAME; | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | errno = ELOOP; | |
1305 | return NULL; | |
1306 | } | |
00eebe35 | 1307 | |
6fb5acfd DT |
1308 | /* backend functions */ |
1309 | int refs_init_db(struct strbuf *err) | |
1310 | { | |
1311 | struct ref_store *refs = get_ref_store(NULL); | |
1312 | ||
1313 | return refs->be->init_db(refs, err); | |
1314 | } | |
1315 | ||
bd40dcda MH |
1316 | const char *resolve_ref_unsafe(const char *refname, int resolve_flags, |
1317 | unsigned char *sha1, int *flags) | |
1318 | { | |
1319 | return resolve_ref_recursively(get_ref_store(NULL), refname, | |
1320 | resolve_flags, sha1, flags); | |
1321 | } | |
1322 | ||
a8355bb7 MH |
1323 | int resolve_gitlink_ref(const char *submodule, const char *refname, |
1324 | unsigned char *sha1) | |
424dcc76 | 1325 | { |
a8355bb7 | 1326 | size_t len = strlen(submodule); |
424dcc76 MH |
1327 | struct ref_store *refs; |
1328 | int flags; | |
1329 | ||
a8355bb7 | 1330 | while (len && submodule[len - 1] == '/') |
424dcc76 | 1331 | len--; |
48a8475f | 1332 | |
424dcc76 MH |
1333 | if (!len) |
1334 | return -1; | |
1335 | ||
a8355bb7 | 1336 | if (submodule[len]) { |
48a8475f | 1337 | /* We need to strip off one or more trailing slashes */ |
a8355bb7 | 1338 | char *stripped = xmemdupz(submodule, len); |
48a8475f MH |
1339 | |
1340 | refs = get_ref_store(stripped); | |
1341 | free(stripped); | |
1342 | } else { | |
a8355bb7 | 1343 | refs = get_ref_store(submodule); |
48a8475f MH |
1344 | } |
1345 | ||
424dcc76 MH |
1346 | if (!refs) |
1347 | return -1; | |
1348 | ||
1349 | if (!resolve_ref_recursively(refs, refname, 0, sha1, &flags) || | |
1350 | is_null_sha1(sha1)) | |
1351 | return -1; | |
1352 | return 0; | |
1353 | } | |
1354 | ||
00eebe35 MH |
1355 | /* A pointer to the ref_store for the main repository: */ |
1356 | static struct ref_store *main_ref_store; | |
1357 | ||
1358 | /* A linked list of ref_stores for submodules: */ | |
1359 | static struct ref_store *submodule_ref_stores; | |
1360 | ||
1361 | void base_ref_store_init(struct ref_store *refs, | |
1362 | const struct ref_storage_be *be, | |
1363 | const char *submodule) | |
1364 | { | |
1365 | refs->be = be; | |
1366 | if (!submodule) { | |
1367 | if (main_ref_store) | |
1368 | die("BUG: main_ref_store initialized twice"); | |
1369 | ||
1370 | refs->submodule = ""; | |
1371 | refs->next = NULL; | |
1372 | main_ref_store = refs; | |
1373 | } else { | |
1374 | if (lookup_ref_store(submodule)) | |
1375 | die("BUG: ref_store for submodule '%s' initialized twice", | |
1376 | submodule); | |
1377 | ||
1378 | refs->submodule = xstrdup(submodule); | |
1379 | refs->next = submodule_ref_stores; | |
1380 | submodule_ref_stores = refs; | |
1381 | } | |
1382 | } | |
1383 | ||
1384 | struct ref_store *ref_store_init(const char *submodule) | |
1385 | { | |
1386 | const char *be_name = "files"; | |
1387 | struct ref_storage_be *be = find_ref_storage_backend(be_name); | |
1388 | ||
1389 | if (!be) | |
1390 | die("BUG: reference backend %s is unknown", be_name); | |
1391 | ||
1392 | if (!submodule || !*submodule) | |
1393 | return be->init(NULL); | |
1394 | else | |
1395 | return be->init(submodule); | |
1396 | } | |
1397 | ||
1398 | struct ref_store *lookup_ref_store(const char *submodule) | |
1399 | { | |
1400 | struct ref_store *refs; | |
1401 | ||
1402 | if (!submodule || !*submodule) | |
1403 | return main_ref_store; | |
1404 | ||
1405 | for (refs = submodule_ref_stores; refs; refs = refs->next) { | |
1406 | if (!strcmp(submodule, refs->submodule)) | |
1407 | return refs; | |
1408 | } | |
1409 | ||
1410 | return NULL; | |
1411 | } | |
1412 | ||
1413 | struct ref_store *get_ref_store(const char *submodule) | |
1414 | { | |
1415 | struct ref_store *refs; | |
1416 | ||
1417 | if (!submodule || !*submodule) { | |
1418 | refs = lookup_ref_store(NULL); | |
1419 | ||
1420 | if (!refs) | |
1421 | refs = ref_store_init(NULL); | |
1422 | } else { | |
1423 | refs = lookup_ref_store(submodule); | |
1424 | ||
1425 | if (!refs) { | |
1426 | struct strbuf submodule_sb = STRBUF_INIT; | |
1427 | ||
1428 | strbuf_addstr(&submodule_sb, submodule); | |
1429 | if (is_nonbare_repository_dir(&submodule_sb)) | |
1430 | refs = ref_store_init(submodule); | |
1431 | strbuf_release(&submodule_sb); | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | return refs; | |
1436 | } | |
1437 | ||
1438 | void assert_main_repository(struct ref_store *refs, const char *caller) | |
1439 | { | |
1440 | if (*refs->submodule) | |
1441 | die("BUG: %s called for a submodule", caller); | |
1442 | } | |
127b42a1 RS |
1443 | |
1444 | /* backend functions */ | |
8231527e MH |
1445 | int pack_refs(unsigned int flags) |
1446 | { | |
1447 | struct ref_store *refs = get_ref_store(NULL); | |
1448 | ||
1449 | return refs->be->pack_refs(refs, flags); | |
1450 | } | |
1451 | ||
bd427cf2 MH |
1452 | int peel_ref(const char *refname, unsigned char *sha1) |
1453 | { | |
1454 | struct ref_store *refs = get_ref_store(NULL); | |
1455 | ||
1456 | return refs->be->peel_ref(refs, refname, sha1); | |
1457 | } | |
1458 | ||
284689ba MH |
1459 | int create_symref(const char *ref_target, const char *refs_heads_master, |
1460 | const char *logmsg) | |
1461 | { | |
1462 | struct ref_store *refs = get_ref_store(NULL); | |
1463 | ||
1464 | return refs->be->create_symref(refs, ref_target, refs_heads_master, | |
1465 | logmsg); | |
1466 | } | |
1467 | ||
127b42a1 RS |
1468 | int ref_transaction_commit(struct ref_transaction *transaction, |
1469 | struct strbuf *err) | |
1470 | { | |
1471 | struct ref_store *refs = get_ref_store(NULL); | |
1472 | ||
1473 | return refs->be->transaction_commit(refs, transaction, err); | |
1474 | } | |
62665823 MH |
1475 | |
1476 | int verify_refname_available(const char *refname, | |
1477 | const struct string_list *extra, | |
1478 | const struct string_list *skip, | |
1479 | struct strbuf *err) | |
1480 | { | |
1481 | struct ref_store *refs = get_ref_store(NULL); | |
1482 | ||
1483 | return refs->be->verify_refname_available(refs, refname, extra, skip, err); | |
1484 | } | |
e3688bd6 DT |
1485 | |
1486 | int for_each_reflog(each_ref_fn fn, void *cb_data) | |
1487 | { | |
1488 | struct ref_store *refs = get_ref_store(NULL); | |
1489 | struct ref_iterator *iter; | |
1490 | ||
1491 | iter = refs->be->reflog_iterator_begin(refs); | |
1492 | ||
1493 | return do_for_each_ref_iterator(iter, fn, cb_data); | |
1494 | } | |
1495 | ||
1496 | int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, | |
1497 | void *cb_data) | |
1498 | { | |
1499 | struct ref_store *refs = get_ref_store(NULL); | |
1500 | ||
1501 | return refs->be->for_each_reflog_ent_reverse(refs, refname, | |
1502 | fn, cb_data); | |
1503 | } | |
1504 | ||
1505 | int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, | |
1506 | void *cb_data) | |
1507 | { | |
1508 | struct ref_store *refs = get_ref_store(NULL); | |
1509 | ||
1510 | return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data); | |
1511 | } | |
1512 | ||
1513 | int reflog_exists(const char *refname) | |
1514 | { | |
1515 | struct ref_store *refs = get_ref_store(NULL); | |
1516 | ||
1517 | return refs->be->reflog_exists(refs, refname); | |
1518 | } | |
1519 | ||
1520 | int safe_create_reflog(const char *refname, int force_create, | |
1521 | struct strbuf *err) | |
1522 | { | |
1523 | struct ref_store *refs = get_ref_store(NULL); | |
1524 | ||
1525 | return refs->be->create_reflog(refs, refname, force_create, err); | |
1526 | } | |
1527 | ||
1528 | int delete_reflog(const char *refname) | |
1529 | { | |
1530 | struct ref_store *refs = get_ref_store(NULL); | |
1531 | ||
1532 | return refs->be->delete_reflog(refs, refname); | |
1533 | } | |
1534 | ||
1535 | int reflog_expire(const char *refname, const unsigned char *sha1, | |
1536 | unsigned int flags, | |
1537 | reflog_expiry_prepare_fn prepare_fn, | |
1538 | reflog_expiry_should_prune_fn should_prune_fn, | |
1539 | reflog_expiry_cleanup_fn cleanup_fn, | |
1540 | void *policy_cb_data) | |
1541 | { | |
1542 | struct ref_store *refs = get_ref_store(NULL); | |
1543 | ||
1544 | return refs->be->reflog_expire(refs, refname, sha1, flags, | |
1545 | prepare_fn, should_prune_fn, | |
1546 | cleanup_fn, policy_cb_data); | |
1547 | } | |
fc681463 DT |
1548 | |
1549 | int initial_ref_transaction_commit(struct ref_transaction *transaction, | |
1550 | struct strbuf *err) | |
1551 | { | |
1552 | struct ref_store *refs = get_ref_store(NULL); | |
1553 | ||
1554 | return refs->be->initial_transaction_commit(refs, transaction, err); | |
1555 | } | |
a27dcf89 DT |
1556 | |
1557 | int delete_refs(struct string_list *refnames, unsigned int flags) | |
1558 | { | |
1559 | struct ref_store *refs = get_ref_store(NULL); | |
1560 | ||
1561 | return refs->be->delete_refs(refs, refnames, flags); | |
1562 | } | |
9b6b40d9 DT |
1563 | |
1564 | int rename_ref(const char *oldref, const char *newref, const char *logmsg) | |
1565 | { | |
1566 | struct ref_store *refs = get_ref_store(NULL); | |
1567 | ||
1568 | return refs->be->rename_ref(refs, oldref, newref, logmsg); | |
1569 | } |