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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 | |
bc5fd6d3 | 12 | /* |
dde8a902 DT |
13 | * How to handle various characters in refnames: |
14 | * 0: An acceptable character for refs | |
5e650228 JH |
15 | * 1: End-of-component |
16 | * 2: ., look for a preceding . to reject .. in refs | |
17 | * 3: {, look for a preceding @ to reject @{ in refs | |
53a8555e | 18 | * 4: A bad character: ASCII control characters, and |
cd377f45 JK |
19 | * ":", "?", "[", "\", "^", "~", SP, or TAB |
20 | * 5: *, reject unless REFNAME_REFSPEC_PATTERN is set | |
dde8a902 DT |
21 | */ |
22 | static unsigned char refname_disposition[256] = { | |
5e650228 JH |
23 | 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, |
24 | 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, | |
cd377f45 | 25 | 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 2, 1, |
5e650228 | 26 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0, 0, 0, 4, |
dde8a902 | 27 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
5e650228 JH |
28 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 4, 0, |
29 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
30 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4 | |
dde8a902 DT |
31 | }; |
32 | ||
33 | /* | |
34 | * Try to read one refname component from the front of refname. | |
35 | * Return the length of the component found, or -1 if the component is | |
36 | * not legal. It is legal if it is something reasonable to have under | |
37 | * ".git/refs/"; We do not like it if: | |
bc5fd6d3 MH |
38 | * |
39 | * - any path component of it begins with ".", or | |
40 | * - it has double dots "..", or | |
53a8555e | 41 | * - it has ASCII control characters, or |
cd377f45 JK |
42 | * - it has ":", "?", "[", "\", "^", "~", SP, or TAB anywhere, or |
43 | * - it has "*" anywhere unless REFNAME_REFSPEC_PATTERN is set, or | |
53a8555e JK |
44 | * - it ends with a "/", or |
45 | * - it ends with ".lock", or | |
46 | * - it contains a "@{" portion | |
bc5fd6d3 | 47 | */ |
cd377f45 | 48 | static int check_refname_component(const char *refname, int *flags) |
bc5fd6d3 MH |
49 | { |
50 | const char *cp; | |
51 | char last = '\0'; | |
52 | ||
53 | for (cp = refname; ; cp++) { | |
dde8a902 DT |
54 | int ch = *cp & 255; |
55 | unsigned char disp = refname_disposition[ch]; | |
56 | switch (disp) { | |
5e650228 | 57 | case 1: |
dde8a902 | 58 | goto out; |
5e650228 | 59 | case 2: |
dde8a902 DT |
60 | if (last == '.') |
61 | return -1; /* Refname contains "..". */ | |
62 | break; | |
5e650228 | 63 | case 3: |
dde8a902 DT |
64 | if (last == '@') |
65 | return -1; /* Refname contains "@{". */ | |
bc5fd6d3 | 66 | break; |
5e650228 | 67 | case 4: |
dde8a902 | 68 | return -1; |
cd377f45 JK |
69 | case 5: |
70 | if (!(*flags & REFNAME_REFSPEC_PATTERN)) | |
71 | return -1; /* refspec can't be a pattern */ | |
72 | ||
73 | /* | |
74 | * Unset the pattern flag so that we only accept | |
75 | * a single asterisk for one side of refspec. | |
76 | */ | |
77 | *flags &= ~ REFNAME_REFSPEC_PATTERN; | |
78 | break; | |
dde8a902 | 79 | } |
bc5fd6d3 MH |
80 | last = ch; |
81 | } | |
dde8a902 | 82 | out: |
bc5fd6d3 | 83 | if (cp == refname) |
dac529e4 | 84 | return 0; /* Component has zero length. */ |
f3cc52d8 JN |
85 | if (refname[0] == '.') |
86 | return -1; /* Component starts with '.'. */ | |
7108ad23 MH |
87 | if (cp - refname >= LOCK_SUFFIX_LEN && |
88 | !memcmp(cp - LOCK_SUFFIX_LEN, LOCK_SUFFIX, LOCK_SUFFIX_LEN)) | |
bc5fd6d3 MH |
89 | return -1; /* Refname ends with ".lock". */ |
90 | return cp - refname; | |
91 | } | |
92 | ||
5e650228 | 93 | int check_refname_format(const char *refname, int flags) |
bc5fd6d3 MH |
94 | { |
95 | int component_len, component_count = 0; | |
96 | ||
9ba89f48 FC |
97 | if (!strcmp(refname, "@")) |
98 | /* Refname is a single character '@'. */ | |
99 | return -1; | |
100 | ||
bc5fd6d3 MH |
101 | while (1) { |
102 | /* We are at the start of a path component. */ | |
cd377f45 JK |
103 | component_len = check_refname_component(refname, &flags); |
104 | if (component_len <= 0) | |
105 | return -1; | |
106 | ||
bc5fd6d3 MH |
107 | component_count++; |
108 | if (refname[component_len] == '\0') | |
109 | break; | |
110 | /* Skip to next component. */ | |
111 | refname += component_len + 1; | |
112 | } | |
113 | ||
114 | if (refname[component_len - 1] == '.') | |
115 | return -1; /* Refname ends with '.'. */ | |
116 | if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2) | |
117 | return -1; /* Refname has only one component. */ | |
118 | return 0; | |
119 | } | |
120 | ||
4cb77009 | 121 | int refname_is_safe(const char *refname) |
d0f810f0 RS |
122 | { |
123 | if (starts_with(refname, "refs/")) { | |
124 | char *buf; | |
125 | int result; | |
126 | ||
3733e694 | 127 | buf = xmallocz(strlen(refname)); |
d0f810f0 RS |
128 | /* |
129 | * Does the refname try to escape refs/? | |
130 | * For example: refs/foo/../bar is safe but refs/foo/../../bar | |
131 | * is not. | |
132 | */ | |
133 | result = !normalize_path_copy(buf, refname + strlen("refs/")); | |
134 | free(buf); | |
135 | return result; | |
136 | } | |
137 | while (*refname) { | |
138 | if (!isupper(*refname) && *refname != '_') | |
139 | return 0; | |
140 | refname++; | |
141 | } | |
142 | return 1; | |
143 | } | |
144 | ||
7bd9bcf3 MH |
145 | char *resolve_refdup(const char *refname, int resolve_flags, |
146 | unsigned char *sha1, int *flags) | |
e1e22e37 | 147 | { |
7bd9bcf3 MH |
148 | return xstrdup_or_null(resolve_ref_unsafe(refname, resolve_flags, |
149 | sha1, flags)); | |
cddc4258 MH |
150 | } |
151 | ||
7bd9bcf3 MH |
152 | /* The argument to filter_refs */ |
153 | struct ref_filter { | |
154 | const char *pattern; | |
155 | each_ref_fn *fn; | |
156 | void *cb_data; | |
157 | }; | |
432ad41e | 158 | |
7bd9bcf3 | 159 | int read_ref_full(const char *refname, int resolve_flags, unsigned char *sha1, int *flags) |
732134ed | 160 | { |
7bd9bcf3 MH |
161 | if (resolve_ref_unsafe(refname, resolve_flags, sha1, flags)) |
162 | return 0; | |
163 | return -1; | |
732134ed MH |
164 | } |
165 | ||
7bd9bcf3 | 166 | int read_ref(const char *refname, unsigned char *sha1) |
cddc4258 | 167 | { |
7bd9bcf3 | 168 | return read_ref_full(refname, RESOLVE_REF_READING, sha1, NULL); |
c774aab9 JP |
169 | } |
170 | ||
7bd9bcf3 | 171 | int ref_exists(const char *refname) |
bc5fd6d3 | 172 | { |
7bd9bcf3 MH |
173 | unsigned char sha1[20]; |
174 | return !!resolve_ref_unsafe(refname, RESOLVE_REF_READING, sha1, NULL); | |
bc5fd6d3 MH |
175 | } |
176 | ||
7bd9bcf3 MH |
177 | static int filter_refs(const char *refname, const struct object_id *oid, |
178 | int flags, void *data) | |
432ad41e | 179 | { |
7bd9bcf3 MH |
180 | struct ref_filter *filter = (struct ref_filter *)data; |
181 | ||
182 | if (wildmatch(filter->pattern, refname, 0, NULL)) | |
183 | return 0; | |
184 | return filter->fn(refname, oid, flags, filter->cb_data); | |
432ad41e MH |
185 | } |
186 | ||
7bd9bcf3 | 187 | enum peel_status peel_object(const unsigned char *name, unsigned char *sha1) |
c774aab9 | 188 | { |
7bd9bcf3 | 189 | struct object *o = lookup_unknown_object(name); |
c774aab9 | 190 | |
7bd9bcf3 MH |
191 | if (o->type == OBJ_NONE) { |
192 | int type = sha1_object_info(name, NULL); | |
193 | if (type < 0 || !object_as_type(o, type, 0)) | |
194 | return PEEL_INVALID; | |
195 | } | |
bc5fd6d3 | 196 | |
7bd9bcf3 MH |
197 | if (o->type != OBJ_TAG) |
198 | return PEEL_NON_TAG; | |
e1980c9d | 199 | |
7bd9bcf3 MH |
200 | o = deref_tag_noverify(o); |
201 | if (!o) | |
202 | return PEEL_INVALID; | |
203 | ||
844a9ce4 | 204 | hashcpy(sha1, o->oid.hash); |
7bd9bcf3 | 205 | return PEEL_PEELED; |
e1980c9d JH |
206 | } |
207 | ||
7bd9bcf3 MH |
208 | struct warn_if_dangling_data { |
209 | FILE *fp; | |
210 | const char *refname; | |
211 | const struct string_list *refnames; | |
212 | const char *msg_fmt; | |
213 | }; | |
bc5fd6d3 | 214 | |
7bd9bcf3 MH |
215 | static int warn_if_dangling_symref(const char *refname, const struct object_id *oid, |
216 | int flags, void *cb_data) | |
217 | { | |
218 | struct warn_if_dangling_data *d = cb_data; | |
219 | const char *resolves_to; | |
220 | struct object_id junk; | |
bc5fd6d3 | 221 | |
7bd9bcf3 MH |
222 | if (!(flags & REF_ISSYMREF)) |
223 | return 0; | |
bc5fd6d3 | 224 | |
7bd9bcf3 MH |
225 | resolves_to = resolve_ref_unsafe(refname, 0, junk.hash, NULL); |
226 | if (!resolves_to | |
227 | || (d->refname | |
228 | ? strcmp(resolves_to, d->refname) | |
229 | : !string_list_has_string(d->refnames, resolves_to))) { | |
230 | return 0; | |
231 | } | |
bc5fd6d3 | 232 | |
7bd9bcf3 MH |
233 | fprintf(d->fp, d->msg_fmt, refname); |
234 | fputc('\n', d->fp); | |
235 | return 0; | |
bc5fd6d3 MH |
236 | } |
237 | ||
7bd9bcf3 | 238 | void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname) |
f348ac92 | 239 | { |
7bd9bcf3 MH |
240 | struct warn_if_dangling_data data; |
241 | ||
242 | data.fp = fp; | |
243 | data.refname = refname; | |
244 | data.refnames = NULL; | |
245 | data.msg_fmt = msg_fmt; | |
246 | for_each_rawref(warn_if_dangling_symref, &data); | |
f348ac92 MH |
247 | } |
248 | ||
7bd9bcf3 | 249 | void warn_dangling_symrefs(FILE *fp, const char *msg_fmt, const struct string_list *refnames) |
432ad41e | 250 | { |
7bd9bcf3 | 251 | struct warn_if_dangling_data data; |
432ad41e | 252 | |
7bd9bcf3 MH |
253 | data.fp = fp; |
254 | data.refname = NULL; | |
255 | data.refnames = refnames; | |
256 | data.msg_fmt = msg_fmt; | |
257 | for_each_rawref(warn_if_dangling_symref, &data); | |
432ad41e MH |
258 | } |
259 | ||
7bd9bcf3 | 260 | int for_each_tag_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 261 | { |
7bd9bcf3 | 262 | return for_each_ref_in("refs/tags/", fn, cb_data); |
432ad41e MH |
263 | } |
264 | ||
7bd9bcf3 | 265 | int for_each_tag_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
506a760d | 266 | { |
7bd9bcf3 | 267 | return for_each_ref_in_submodule(submodule, "refs/tags/", fn, cb_data); |
432ad41e MH |
268 | } |
269 | ||
7bd9bcf3 | 270 | int for_each_branch_ref(each_ref_fn fn, void *cb_data) |
432ad41e | 271 | { |
7bd9bcf3 | 272 | return for_each_ref_in("refs/heads/", fn, cb_data); |
432ad41e MH |
273 | } |
274 | ||
7bd9bcf3 | 275 | int for_each_branch_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
202a56a9 | 276 | { |
7bd9bcf3 | 277 | return for_each_ref_in_submodule(submodule, "refs/heads/", fn, cb_data); |
202a56a9 | 278 | } |
432ad41e | 279 | |
7bd9bcf3 | 280 | int for_each_remote_ref(each_ref_fn fn, void *cb_data) |
e9c4c111 | 281 | { |
7bd9bcf3 | 282 | return for_each_ref_in("refs/remotes/", fn, cb_data); |
202a56a9 MH |
283 | } |
284 | ||
7bd9bcf3 | 285 | int for_each_remote_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) |
e9c4c111 | 286 | { |
7bd9bcf3 | 287 | return for_each_ref_in_submodule(submodule, "refs/remotes/", fn, cb_data); |
662428f4 | 288 | } |
c774aab9 | 289 | |
7bd9bcf3 MH |
290 | int head_ref_namespaced(each_ref_fn fn, void *cb_data) |
291 | { | |
292 | struct strbuf buf = STRBUF_INIT; | |
293 | int ret = 0; | |
294 | struct object_id oid; | |
295 | int flag; | |
c774aab9 | 296 | |
7bd9bcf3 MH |
297 | strbuf_addf(&buf, "%sHEAD", get_git_namespace()); |
298 | if (!read_ref_full(buf.buf, RESOLVE_REF_READING, oid.hash, &flag)) | |
299 | ret = fn(buf.buf, &oid, flag, cb_data); | |
300 | strbuf_release(&buf); | |
c774aab9 | 301 | |
7bd9bcf3 | 302 | return ret; |
e9c4c111 | 303 | } |
c774aab9 | 304 | |
7bd9bcf3 MH |
305 | int for_each_glob_ref_in(each_ref_fn fn, const char *pattern, |
306 | const char *prefix, void *cb_data) | |
662428f4 | 307 | { |
7bd9bcf3 MH |
308 | struct strbuf real_pattern = STRBUF_INIT; |
309 | struct ref_filter filter; | |
310 | int ret; | |
d08bae7e | 311 | |
59556548 | 312 | if (!prefix && !starts_with(pattern, "refs/")) |
d08bae7e | 313 | strbuf_addstr(&real_pattern, "refs/"); |
b09fe971 IL |
314 | else if (prefix) |
315 | strbuf_addstr(&real_pattern, prefix); | |
d08bae7e IL |
316 | strbuf_addstr(&real_pattern, pattern); |
317 | ||
894a9d33 | 318 | if (!has_glob_specials(pattern)) { |
9517e6b8 | 319 | /* Append implied '/' '*' if not present. */ |
00b6c178 | 320 | strbuf_complete(&real_pattern, '/'); |
d08bae7e IL |
321 | /* No need to check for '*', there is none. */ |
322 | strbuf_addch(&real_pattern, '*'); | |
323 | } | |
324 | ||
325 | filter.pattern = real_pattern.buf; | |
326 | filter.fn = fn; | |
327 | filter.cb_data = cb_data; | |
328 | ret = for_each_ref(filter_refs, &filter); | |
329 | ||
330 | strbuf_release(&real_pattern); | |
331 | return ret; | |
332 | } | |
333 | ||
b09fe971 IL |
334 | int for_each_glob_ref(each_ref_fn fn, const char *pattern, void *cb_data) |
335 | { | |
336 | return for_each_glob_ref_in(fn, pattern, NULL, cb_data); | |
337 | } | |
338 | ||
4577e483 | 339 | const char *prettify_refname(const char *name) |
a9c37a72 | 340 | { |
a9c37a72 | 341 | return name + ( |
59556548 CC |
342 | starts_with(name, "refs/heads/") ? 11 : |
343 | starts_with(name, "refs/tags/") ? 10 : | |
344 | starts_with(name, "refs/remotes/") ? 13 : | |
a9c37a72 DB |
345 | 0); |
346 | } | |
347 | ||
54457fe5 | 348 | static const char *ref_rev_parse_rules[] = { |
79803322 SP |
349 | "%.*s", |
350 | "refs/%.*s", | |
351 | "refs/tags/%.*s", | |
352 | "refs/heads/%.*s", | |
353 | "refs/remotes/%.*s", | |
354 | "refs/remotes/%.*s/HEAD", | |
355 | NULL | |
356 | }; | |
357 | ||
54457fe5 | 358 | int refname_match(const char *abbrev_name, const char *full_name) |
79803322 SP |
359 | { |
360 | const char **p; | |
361 | const int abbrev_name_len = strlen(abbrev_name); | |
362 | ||
54457fe5 | 363 | for (p = ref_rev_parse_rules; *p; p++) { |
79803322 SP |
364 | if (!strcmp(full_name, mkpath(*p, abbrev_name_len, abbrev_name))) { |
365 | return 1; | |
366 | } | |
367 | } | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
ff74f7f1 JH |
372 | /* |
373 | * *string and *len will only be substituted, and *string returned (for | |
374 | * later free()ing) if the string passed in is a magic short-hand form | |
375 | * to name a branch. | |
376 | */ | |
377 | static char *substitute_branch_name(const char **string, int *len) | |
378 | { | |
379 | struct strbuf buf = STRBUF_INIT; | |
cf99a761 | 380 | int ret = interpret_branch_name(*string, *len, &buf); |
ff74f7f1 JH |
381 | |
382 | if (ret == *len) { | |
383 | size_t size; | |
384 | *string = strbuf_detach(&buf, &size); | |
385 | *len = size; | |
386 | return (char *)*string; | |
387 | } | |
388 | ||
389 | return NULL; | |
390 | } | |
391 | ||
392 | int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref) | |
393 | { | |
394 | char *last_branch = substitute_branch_name(&str, &len); | |
395 | const char **p, *r; | |
396 | int refs_found = 0; | |
397 | ||
398 | *ref = NULL; | |
399 | for (p = ref_rev_parse_rules; *p; p++) { | |
400 | char fullref[PATH_MAX]; | |
401 | unsigned char sha1_from_ref[20]; | |
402 | unsigned char *this_result; | |
403 | int flag; | |
404 | ||
405 | this_result = refs_found ? sha1_from_ref : sha1; | |
406 | mksnpath(fullref, sizeof(fullref), *p, len, str); | |
7695d118 RS |
407 | r = resolve_ref_unsafe(fullref, RESOLVE_REF_READING, |
408 | this_result, &flag); | |
ff74f7f1 JH |
409 | if (r) { |
410 | if (!refs_found++) | |
411 | *ref = xstrdup(r); | |
412 | if (!warn_ambiguous_refs) | |
413 | break; | |
55956350 | 414 | } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD")) { |
ff74f7f1 | 415 | warning("ignoring dangling symref %s.", fullref); |
55956350 JH |
416 | } else if ((flag & REF_ISBROKEN) && strchr(fullref, '/')) { |
417 | warning("ignoring broken ref %s.", fullref); | |
418 | } | |
ff74f7f1 JH |
419 | } |
420 | free(last_branch); | |
421 | return refs_found; | |
422 | } | |
423 | ||
424 | int dwim_log(const char *str, int len, unsigned char *sha1, char **log) | |
425 | { | |
426 | char *last_branch = substitute_branch_name(&str, &len); | |
427 | const char **p; | |
428 | int logs_found = 0; | |
429 | ||
430 | *log = NULL; | |
431 | for (p = ref_rev_parse_rules; *p; p++) { | |
ff74f7f1 JH |
432 | unsigned char hash[20]; |
433 | char path[PATH_MAX]; | |
434 | const char *ref, *it; | |
435 | ||
436 | mksnpath(path, sizeof(path), *p, len, str); | |
7695d118 RS |
437 | ref = resolve_ref_unsafe(path, RESOLVE_REF_READING, |
438 | hash, NULL); | |
ff74f7f1 JH |
439 | if (!ref) |
440 | continue; | |
4da58835 | 441 | if (reflog_exists(path)) |
ff74f7f1 | 442 | it = path; |
4da58835 | 443 | else if (strcmp(ref, path) && reflog_exists(ref)) |
ff74f7f1 JH |
444 | it = ref; |
445 | else | |
446 | continue; | |
447 | if (!logs_found++) { | |
448 | *log = xstrdup(it); | |
449 | hashcpy(sha1, hash); | |
450 | } | |
7bd9bcf3 MH |
451 | if (!warn_ambiguous_refs) |
452 | break; | |
c0277d15 | 453 | } |
7bd9bcf3 MH |
454 | free(last_branch); |
455 | return logs_found; | |
2ddb5d17 BK |
456 | } |
457 | ||
266b1827 DT |
458 | static int is_per_worktree_ref(const char *refname) |
459 | { | |
ce414b33 DT |
460 | return !strcmp(refname, "HEAD") || |
461 | starts_with(refname, "refs/bisect/"); | |
266b1827 DT |
462 | } |
463 | ||
464 | static int is_pseudoref_syntax(const char *refname) | |
465 | { | |
466 | const char *c; | |
467 | ||
468 | for (c = refname; *c; c++) { | |
469 | if (!isupper(*c) && *c != '-' && *c != '_') | |
470 | return 0; | |
471 | } | |
472 | ||
473 | return 1; | |
474 | } | |
475 | ||
476 | enum ref_type ref_type(const char *refname) | |
477 | { | |
478 | if (is_per_worktree_ref(refname)) | |
479 | return REF_TYPE_PER_WORKTREE; | |
480 | if (is_pseudoref_syntax(refname)) | |
481 | return REF_TYPE_PSEUDOREF; | |
482 | return REF_TYPE_NORMAL; | |
483 | } | |
484 | ||
74ec19d4 DT |
485 | static int write_pseudoref(const char *pseudoref, const unsigned char *sha1, |
486 | const unsigned char *old_sha1, struct strbuf *err) | |
487 | { | |
488 | const char *filename; | |
489 | int fd; | |
490 | static struct lock_file lock; | |
491 | struct strbuf buf = STRBUF_INIT; | |
492 | int ret = -1; | |
493 | ||
494 | strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1)); | |
495 | ||
496 | filename = git_path("%s", pseudoref); | |
497 | fd = hold_lock_file_for_update(&lock, filename, LOCK_DIE_ON_ERROR); | |
498 | if (fd < 0) { | |
499 | strbuf_addf(err, "Could not open '%s' for writing: %s", | |
500 | filename, strerror(errno)); | |
501 | return -1; | |
502 | } | |
503 | ||
504 | if (old_sha1) { | |
505 | unsigned char actual_old_sha1[20]; | |
2c3aed13 DT |
506 | |
507 | if (read_ref(pseudoref, actual_old_sha1)) | |
508 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 DT |
509 | if (hashcmp(actual_old_sha1, old_sha1)) { |
510 | strbuf_addf(err, "Unexpected sha1 when writing %s", pseudoref); | |
511 | rollback_lock_file(&lock); | |
512 | goto done; | |
513 | } | |
514 | } | |
515 | ||
516 | if (write_in_full(fd, buf.buf, buf.len) != buf.len) { | |
517 | strbuf_addf(err, "Could not write to '%s'", filename); | |
518 | rollback_lock_file(&lock); | |
519 | goto done; | |
520 | } | |
521 | ||
522 | commit_lock_file(&lock); | |
523 | ret = 0; | |
524 | done: | |
525 | strbuf_release(&buf); | |
526 | return ret; | |
527 | } | |
528 | ||
529 | static int delete_pseudoref(const char *pseudoref, const unsigned char *old_sha1) | |
530 | { | |
531 | static struct lock_file lock; | |
532 | const char *filename; | |
533 | ||
534 | filename = git_path("%s", pseudoref); | |
535 | ||
536 | if (old_sha1 && !is_null_sha1(old_sha1)) { | |
537 | int fd; | |
538 | unsigned char actual_old_sha1[20]; | |
539 | ||
540 | fd = hold_lock_file_for_update(&lock, filename, | |
541 | LOCK_DIE_ON_ERROR); | |
542 | if (fd < 0) | |
543 | die_errno(_("Could not open '%s' for writing"), filename); | |
2c3aed13 DT |
544 | if (read_ref(pseudoref, actual_old_sha1)) |
545 | die("could not read ref '%s'", pseudoref); | |
74ec19d4 DT |
546 | if (hashcmp(actual_old_sha1, old_sha1)) { |
547 | warning("Unexpected sha1 when deleting %s", pseudoref); | |
548 | rollback_lock_file(&lock); | |
549 | return -1; | |
a4c653df | 550 | } |
74ec19d4 DT |
551 | |
552 | unlink(filename); | |
553 | rollback_lock_file(&lock); | |
554 | } else { | |
555 | unlink(filename); | |
4bd18c43 | 556 | } |
a4c653df | 557 | |
4bd18c43 | 558 | return 0; |
95fc7512 | 559 | } |
d556fae2 | 560 | |
fc1c2168 MH |
561 | int delete_ref(const char *refname, const unsigned char *old_sha1, |
562 | unsigned int flags) | |
41b625b0 | 563 | { |
7521cc46 | 564 | struct ref_transaction *transaction; |
a4c653df | 565 | struct strbuf err = STRBUF_INIT; |
8b5157e4 | 566 | |
74ec19d4 | 567 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) |
080cc646 | 568 | return delete_pseudoref(refname, old_sha1); |
d48744d1 | 569 | |
7521cc46 RS |
570 | transaction = ref_transaction_begin(&err); |
571 | if (!transaction || | |
fc67a082 | 572 | ref_transaction_delete(transaction, refname, old_sha1, |
fb5a6bb6 | 573 | flags, NULL, &err) || |
db7516ab | 574 | ref_transaction_commit(transaction, &err)) { |
7521cc46 RS |
575 | error("%s", err.buf); |
576 | ref_transaction_free(transaction); | |
577 | strbuf_release(&err); | |
c0277d15 | 578 | return 1; |
41b625b0 | 579 | } |
7bd9bcf3 MH |
580 | ref_transaction_free(transaction); |
581 | strbuf_release(&err); | |
b531394d BC |
582 | return 0; |
583 | } | |
41b625b0 | 584 | |
4cb77009 | 585 | int copy_reflog_msg(char *buf, const char *msg) |
0ec29a47 JH |
586 | { |
587 | char *cp = buf; | |
588 | char c; | |
589 | int wasspace = 1; | |
8b5157e4 | 590 | |
0ec29a47 JH |
591 | *cp++ = '\t'; |
592 | while ((c = *msg++)) { | |
593 | if (wasspace && isspace(c)) | |
594 | continue; | |
595 | wasspace = isspace(c); | |
596 | if (wasspace) | |
597 | c = ' '; | |
598 | *cp++ = c; | |
a4c653df | 599 | } |
0ec29a47 JH |
600 | while (buf < cp && isspace(cp[-1])) |
601 | cp--; | |
602 | *cp++ = '\n'; | |
603 | return cp - buf; | |
604 | } | |
8b5157e4 | 605 | |
4cb77009 | 606 | int should_autocreate_reflog(const char *refname) |
4e2bef57 DT |
607 | { |
608 | if (!log_all_ref_updates) | |
609 | return 0; | |
610 | return starts_with(refname, "refs/heads/") || | |
611 | starts_with(refname, "refs/remotes/") || | |
612 | starts_with(refname, "refs/notes/") || | |
613 | !strcmp(refname, "HEAD"); | |
614 | } | |
615 | ||
e7e0f26e | 616 | int is_branch(const char *refname) |
c3b0dec5 | 617 | { |
59556548 | 618 | return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/"); |
41b625b0 NP |
619 | } |
620 | ||
4207ed28 RS |
621 | struct read_ref_at_cb { |
622 | const char *refname; | |
623 | unsigned long at_time; | |
624 | int cnt; | |
625 | int reccnt; | |
626 | unsigned char *sha1; | |
627 | int found_it; | |
628 | ||
629 | unsigned char osha1[20]; | |
630 | unsigned char nsha1[20]; | |
631 | int tz; | |
632 | unsigned long date; | |
633 | char **msg; | |
634 | unsigned long *cutoff_time; | |
635 | int *cutoff_tz; | |
636 | int *cutoff_cnt; | |
637 | }; | |
638 | ||
639 | static int read_ref_at_ent(unsigned char *osha1, unsigned char *nsha1, | |
640 | const char *email, unsigned long timestamp, int tz, | |
641 | const char *message, void *cb_data) | |
642 | { | |
643 | struct read_ref_at_cb *cb = cb_data; | |
644 | ||
645 | cb->reccnt++; | |
646 | cb->tz = tz; | |
647 | cb->date = timestamp; | |
648 | ||
649 | if (timestamp <= cb->at_time || cb->cnt == 0) { | |
650 | if (cb->msg) | |
651 | *cb->msg = xstrdup(message); | |
652 | if (cb->cutoff_time) | |
653 | *cb->cutoff_time = timestamp; | |
654 | if (cb->cutoff_tz) | |
655 | *cb->cutoff_tz = tz; | |
656 | if (cb->cutoff_cnt) | |
657 | *cb->cutoff_cnt = cb->reccnt - 1; | |
658 | /* | |
659 | * we have not yet updated cb->[n|o]sha1 so they still | |
660 | * hold the values for the previous record. | |
661 | */ | |
662 | if (!is_null_sha1(cb->osha1)) { | |
663 | hashcpy(cb->sha1, nsha1); | |
664 | if (hashcmp(cb->osha1, nsha1)) | |
665 | warning("Log for ref %s has gap after %s.", | |
a5481a6c | 666 | cb->refname, show_date(cb->date, cb->tz, DATE_MODE(RFC2822))); |
4207ed28 RS |
667 | } |
668 | else if (cb->date == cb->at_time) | |
669 | hashcpy(cb->sha1, nsha1); | |
670 | else if (hashcmp(nsha1, cb->sha1)) | |
671 | warning("Log for ref %s unexpectedly ended on %s.", | |
672 | cb->refname, show_date(cb->date, cb->tz, | |
a5481a6c | 673 | DATE_MODE(RFC2822))); |
4207ed28 RS |
674 | hashcpy(cb->osha1, osha1); |
675 | hashcpy(cb->nsha1, nsha1); | |
676 | cb->found_it = 1; | |
677 | return 1; | |
678 | } | |
679 | hashcpy(cb->osha1, osha1); | |
680 | hashcpy(cb->nsha1, nsha1); | |
681 | if (cb->cnt > 0) | |
682 | cb->cnt--; | |
683 | return 0; | |
684 | } | |
685 | ||
686 | static int read_ref_at_ent_oldest(unsigned char *osha1, unsigned char *nsha1, | |
687 | const char *email, unsigned long timestamp, | |
688 | int tz, const char *message, void *cb_data) | |
689 | { | |
690 | struct read_ref_at_cb *cb = cb_data; | |
691 | ||
692 | if (cb->msg) | |
693 | *cb->msg = xstrdup(message); | |
694 | if (cb->cutoff_time) | |
695 | *cb->cutoff_time = timestamp; | |
696 | if (cb->cutoff_tz) | |
697 | *cb->cutoff_tz = tz; | |
698 | if (cb->cutoff_cnt) | |
699 | *cb->cutoff_cnt = cb->reccnt; | |
700 | hashcpy(cb->sha1, osha1); | |
701 | if (is_null_sha1(cb->sha1)) | |
702 | hashcpy(cb->sha1, nsha1); | |
703 | /* We just want the first entry */ | |
704 | return 1; | |
16d7cc90 JH |
705 | } |
706 | ||
c41a87dd | 707 | int read_ref_at(const char *refname, unsigned int flags, unsigned long at_time, int cnt, |
dfefa935 MH |
708 | unsigned char *sha1, char **msg, |
709 | unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt) | |
d556fae2 | 710 | { |
4207ed28 | 711 | struct read_ref_at_cb cb; |
d556fae2 | 712 | |
4207ed28 RS |
713 | memset(&cb, 0, sizeof(cb)); |
714 | cb.refname = refname; | |
715 | cb.at_time = at_time; | |
716 | cb.cnt = cnt; | |
717 | cb.msg = msg; | |
718 | cb.cutoff_time = cutoff_time; | |
719 | cb.cutoff_tz = cutoff_tz; | |
720 | cb.cutoff_cnt = cutoff_cnt; | |
721 | cb.sha1 = sha1; | |
722 | ||
723 | for_each_reflog_ent_reverse(refname, read_ref_at_ent, &cb); | |
724 | ||
c41a87dd DA |
725 | if (!cb.reccnt) { |
726 | if (flags & GET_SHA1_QUIETLY) | |
727 | exit(128); | |
728 | else | |
729 | die("Log for %s is empty.", refname); | |
730 | } | |
4207ed28 RS |
731 | if (cb.found_it) |
732 | return 0; | |
733 | ||
734 | for_each_reflog_ent(refname, read_ref_at_ent_oldest, &cb); | |
d556fae2 | 735 | |
16d7cc90 | 736 | return 1; |
d556fae2 | 737 | } |
2ff81662 | 738 | |
93a644ea | 739 | struct ref_transaction *ref_transaction_begin(struct strbuf *err) |
caa4046c | 740 | { |
5a603b04 JN |
741 | assert(err); |
742 | ||
caa4046c MH |
743 | return xcalloc(1, sizeof(struct ref_transaction)); |
744 | } | |
745 | ||
026bd1d3 | 746 | void ref_transaction_free(struct ref_transaction *transaction) |
caa4046c MH |
747 | { |
748 | int i; | |
749 | ||
1b07255c RS |
750 | if (!transaction) |
751 | return; | |
752 | ||
db7516ab RS |
753 | for (i = 0; i < transaction->nr; i++) { |
754 | free(transaction->updates[i]->msg); | |
88615910 | 755 | free(transaction->updates[i]); |
db7516ab | 756 | } |
caa4046c MH |
757 | free(transaction->updates); |
758 | free(transaction); | |
759 | } | |
760 | ||
caa4046c MH |
761 | static struct ref_update *add_update(struct ref_transaction *transaction, |
762 | const char *refname) | |
763 | { | |
96ffc06f JK |
764 | struct ref_update *update; |
765 | FLEX_ALLOC_STR(update, refname, refname); | |
caa4046c MH |
766 | ALLOC_GROW(transaction->updates, transaction->nr + 1, transaction->alloc); |
767 | transaction->updates[transaction->nr++] = update; | |
768 | return update; | |
769 | } | |
770 | ||
8e34800e RS |
771 | int ref_transaction_update(struct ref_transaction *transaction, |
772 | const char *refname, | |
773 | const unsigned char *new_sha1, | |
774 | const unsigned char *old_sha1, | |
1d147bdf | 775 | unsigned int flags, const char *msg, |
8e34800e | 776 | struct strbuf *err) |
caa4046c | 777 | { |
8e34800e | 778 | struct ref_update *update; |
caa4046c | 779 | |
5a603b04 JN |
780 | assert(err); |
781 | ||
2bdc785f RS |
782 | if (transaction->state != REF_TRANSACTION_OPEN) |
783 | die("BUG: update called for transaction that is not open"); | |
784 | ||
16180334 | 785 | if (new_sha1 && !is_null_sha1(new_sha1) && |
d0f810f0 RS |
786 | check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { |
787 | strbuf_addf(err, "refusing to update ref with bad name %s", | |
788 | refname); | |
789 | return -1; | |
790 | } | |
791 | ||
8e34800e | 792 | update = add_update(transaction, refname); |
16180334 MH |
793 | if (new_sha1) { |
794 | hashcpy(update->new_sha1, new_sha1); | |
795 | flags |= REF_HAVE_NEW; | |
796 | } | |
1d147bdf | 797 | if (old_sha1) { |
caa4046c | 798 | hashcpy(update->old_sha1, old_sha1); |
8df4e511 MH |
799 | flags |= REF_HAVE_OLD; |
800 | } | |
801 | update->flags = flags; | |
db7516ab RS |
802 | if (msg) |
803 | update->msg = xstrdup(msg); | |
8e34800e | 804 | return 0; |
caa4046c MH |
805 | } |
806 | ||
b416af5b RS |
807 | int ref_transaction_create(struct ref_transaction *transaction, |
808 | const char *refname, | |
809 | const unsigned char *new_sha1, | |
fec14ec3 | 810 | unsigned int flags, const char *msg, |
b416af5b | 811 | struct strbuf *err) |
caa4046c | 812 | { |
f04c5b55 MH |
813 | if (!new_sha1 || is_null_sha1(new_sha1)) |
814 | die("BUG: create called without valid new_sha1"); | |
bc9f2925 | 815 | return ref_transaction_update(transaction, refname, new_sha1, |
1d147bdf | 816 | null_sha1, flags, msg, err); |
caa4046c MH |
817 | } |
818 | ||
8c8bdc0d RS |
819 | int ref_transaction_delete(struct ref_transaction *transaction, |
820 | const char *refname, | |
821 | const unsigned char *old_sha1, | |
fb5a6bb6 | 822 | unsigned int flags, const char *msg, |
8c8bdc0d | 823 | struct strbuf *err) |
caa4046c | 824 | { |
60294596 MH |
825 | if (old_sha1 && is_null_sha1(old_sha1)) |
826 | die("BUG: delete called with old_sha1 set to zeros"); | |
1d147bdf | 827 | return ref_transaction_update(transaction, refname, |
fb5a6bb6 | 828 | null_sha1, old_sha1, |
1d147bdf | 829 | flags, msg, err); |
caa4046c MH |
830 | } |
831 | ||
16180334 MH |
832 | int ref_transaction_verify(struct ref_transaction *transaction, |
833 | const char *refname, | |
834 | const unsigned char *old_sha1, | |
835 | unsigned int flags, | |
836 | struct strbuf *err) | |
837 | { | |
838 | if (!old_sha1) | |
839 | die("BUG: verify called with old_sha1 set to NULL"); | |
840 | return ref_transaction_update(transaction, refname, | |
841 | NULL, old_sha1, | |
842 | flags, NULL, err); | |
843 | } | |
844 | ||
4b7b520b MH |
845 | int update_ref(const char *msg, const char *refname, |
846 | const unsigned char *new_sha1, const unsigned char *old_sha1, | |
fec14ec3 | 847 | unsigned int flags, enum action_on_err onerr) |
4738a333 | 848 | { |
74ec19d4 | 849 | struct ref_transaction *t = NULL; |
b4d75ac1 | 850 | struct strbuf err = STRBUF_INIT; |
74ec19d4 | 851 | int ret = 0; |
b4d75ac1 | 852 | |
74ec19d4 DT |
853 | if (ref_type(refname) == REF_TYPE_PSEUDOREF) { |
854 | ret = write_pseudoref(refname, new_sha1, old_sha1, &err); | |
855 | } else { | |
856 | t = ref_transaction_begin(&err); | |
857 | if (!t || | |
858 | ref_transaction_update(t, refname, new_sha1, old_sha1, | |
859 | flags, msg, &err) || | |
860 | ref_transaction_commit(t, &err)) { | |
861 | ret = 1; | |
862 | ref_transaction_free(t); | |
863 | } | |
864 | } | |
865 | if (ret) { | |
b4d75ac1 RS |
866 | const char *str = "update_ref failed for ref '%s': %s"; |
867 | ||
b4d75ac1 RS |
868 | switch (onerr) { |
869 | case UPDATE_REFS_MSG_ON_ERR: | |
870 | error(str, refname, err.buf); | |
871 | break; | |
872 | case UPDATE_REFS_DIE_ON_ERR: | |
873 | die(str, refname, err.buf); | |
874 | break; | |
875 | case UPDATE_REFS_QUIET_ON_ERR: | |
876 | break; | |
877 | } | |
878 | strbuf_release(&err); | |
4738a333 | 879 | return 1; |
b4d75ac1 RS |
880 | } |
881 | strbuf_release(&err); | |
74ec19d4 DT |
882 | if (t) |
883 | ref_transaction_free(t); | |
b4d75ac1 | 884 | return 0; |
4738a333 BK |
885 | } |
886 | ||
dfefa935 | 887 | char *shorten_unambiguous_ref(const char *refname, int strict) |
7c2b3029 JK |
888 | { |
889 | int i; | |
890 | static char **scanf_fmts; | |
891 | static int nr_rules; | |
892 | char *short_name; | |
893 | ||
7c2b3029 | 894 | if (!nr_rules) { |
4346663a MH |
895 | /* |
896 | * Pre-generate scanf formats from ref_rev_parse_rules[]. | |
897 | * Generate a format suitable for scanf from a | |
898 | * ref_rev_parse_rules rule by interpolating "%s" at the | |
899 | * location of the "%.*s". | |
900 | */ | |
7c2b3029 | 901 | size_t total_len = 0; |
84d5633f | 902 | size_t offset = 0; |
7c2b3029 JK |
903 | |
904 | /* the rule list is NULL terminated, count them first */ | |
a4165851 | 905 | for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++) |
7902fe03 MH |
906 | /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */ |
907 | total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1; | |
7c2b3029 | 908 | |
50a6c8ef | 909 | scanf_fmts = xmalloc(st_add(st_mult(nr_rules, sizeof(char *)), total_len)); |
7c2b3029 | 910 | |
84d5633f | 911 | offset = 0; |
7c2b3029 | 912 | for (i = 0; i < nr_rules; i++) { |
4346663a | 913 | assert(offset < total_len); |
84d5633f | 914 | scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset; |
4346663a MH |
915 | offset += snprintf(scanf_fmts[i], total_len - offset, |
916 | ref_rev_parse_rules[i], 2, "%s") + 1; | |
7c2b3029 JK |
917 | } |
918 | } | |
919 | ||
920 | /* bail out if there are no rules */ | |
921 | if (!nr_rules) | |
dfefa935 | 922 | return xstrdup(refname); |
7c2b3029 | 923 | |
dfefa935 MH |
924 | /* buffer for scanf result, at most refname must fit */ |
925 | short_name = xstrdup(refname); | |
7c2b3029 JK |
926 | |
927 | /* skip first rule, it will always match */ | |
928 | for (i = nr_rules - 1; i > 0 ; --i) { | |
929 | int j; | |
6e7b3309 | 930 | int rules_to_fail = i; |
7c2b3029 JK |
931 | int short_name_len; |
932 | ||
dfefa935 | 933 | if (1 != sscanf(refname, scanf_fmts[i], short_name)) |
7c2b3029 JK |
934 | continue; |
935 | ||
936 | short_name_len = strlen(short_name); | |
937 | ||
6e7b3309 BW |
938 | /* |
939 | * in strict mode, all (except the matched one) rules | |
940 | * must fail to resolve to a valid non-ambiguous ref | |
941 | */ | |
942 | if (strict) | |
943 | rules_to_fail = nr_rules; | |
944 | ||
7c2b3029 JK |
945 | /* |
946 | * check if the short name resolves to a valid ref, | |
947 | * but use only rules prior to the matched one | |
948 | */ | |
6e7b3309 | 949 | for (j = 0; j < rules_to_fail; j++) { |
7c2b3029 | 950 | const char *rule = ref_rev_parse_rules[j]; |
7c2b3029 JK |
951 | char refname[PATH_MAX]; |
952 | ||
6e7b3309 BW |
953 | /* skip matched rule */ |
954 | if (i == j) | |
955 | continue; | |
956 | ||
7c2b3029 JK |
957 | /* |
958 | * the short name is ambiguous, if it resolves | |
959 | * (with this previous rule) to a valid ref | |
960 | * read_ref() returns 0 on success | |
961 | */ | |
962 | mksnpath(refname, sizeof(refname), | |
963 | rule, short_name_len, short_name); | |
c6893323 | 964 | if (ref_exists(refname)) |
7c2b3029 JK |
965 | break; |
966 | } | |
967 | ||
968 | /* | |
969 | * short name is non-ambiguous if all previous rules | |
970 | * haven't resolved to a valid ref | |
971 | */ | |
6e7b3309 | 972 | if (j == rules_to_fail) |
7c2b3029 JK |
973 | return short_name; |
974 | } | |
975 | ||
976 | free(short_name); | |
dfefa935 | 977 | return xstrdup(refname); |
7c2b3029 | 978 | } |
daebaa78 JH |
979 | |
980 | static struct string_list *hide_refs; | |
981 | ||
982 | int parse_hide_refs_config(const char *var, const char *value, const char *section) | |
983 | { | |
984 | if (!strcmp("transfer.hiderefs", var) || | |
985 | /* NEEDSWORK: use parse_config_key() once both are merged */ | |
59556548 | 986 | (starts_with(var, section) && var[strlen(section)] == '.' && |
daebaa78 JH |
987 | !strcmp(var + strlen(section), ".hiderefs"))) { |
988 | char *ref; | |
989 | int len; | |
990 | ||
991 | if (!value) | |
992 | return config_error_nonbool(var); | |
993 | ref = xstrdup(value); | |
994 | len = strlen(ref); | |
995 | while (len && ref[len - 1] == '/') | |
996 | ref[--len] = '\0'; | |
997 | if (!hide_refs) { | |
998 | hide_refs = xcalloc(1, sizeof(*hide_refs)); | |
999 | hide_refs->strdup_strings = 1; | |
1000 | } | |
1001 | string_list_append(hide_refs, ref); | |
1002 | } | |
1003 | return 0; | |
1004 | } | |
1005 | ||
78a766ab | 1006 | int ref_is_hidden(const char *refname, const char *refname_full) |
daebaa78 | 1007 | { |
2bc31d16 | 1008 | int i; |
daebaa78 JH |
1009 | |
1010 | if (!hide_refs) | |
1011 | return 0; | |
2bc31d16 JK |
1012 | for (i = hide_refs->nr - 1; i >= 0; i--) { |
1013 | const char *match = hide_refs->items[i].string; | |
78a766ab | 1014 | const char *subject; |
2bc31d16 | 1015 | int neg = 0; |
daebaa78 | 1016 | int len; |
2bc31d16 JK |
1017 | |
1018 | if (*match == '!') { | |
1019 | neg = 1; | |
1020 | match++; | |
1021 | } | |
1022 | ||
78a766ab LF |
1023 | if (*match == '^') { |
1024 | subject = refname_full; | |
1025 | match++; | |
1026 | } else { | |
1027 | subject = refname; | |
1028 | } | |
1029 | ||
1030 | /* refname can be NULL when namespaces are used. */ | |
1031 | if (!subject || !starts_with(subject, match)) | |
daebaa78 | 1032 | continue; |
2bc31d16 | 1033 | len = strlen(match); |
78a766ab | 1034 | if (!subject[len] || subject[len] == '/') |
2bc31d16 | 1035 | return !neg; |
daebaa78 JH |
1036 | } |
1037 | return 0; | |
1038 | } | |
fa5b1830 | 1039 | |
0845122c DT |
1040 | const char *find_descendant_ref(const char *dirname, |
1041 | const struct string_list *extras, | |
1042 | const struct string_list *skip) | |
fa5b1830 | 1043 | { |
0845122c | 1044 | int pos; |
fa5b1830 | 1045 | |
0845122c DT |
1046 | if (!extras) |
1047 | return NULL; | |
fa5b1830 MH |
1048 | |
1049 | /* | |
0845122c DT |
1050 | * Look at the place where dirname would be inserted into |
1051 | * extras. If there is an entry at that position that starts | |
1052 | * with dirname (remember, dirname includes the trailing | |
1053 | * slash) and is not in skip, then we have a conflict. | |
fa5b1830 | 1054 | */ |
0845122c DT |
1055 | for (pos = string_list_find_insert_index(extras, dirname, 0); |
1056 | pos < extras->nr; pos++) { | |
1057 | const char *extra_refname = extras->items[pos].string; | |
fa5b1830 | 1058 | |
0845122c DT |
1059 | if (!starts_with(extra_refname, dirname)) |
1060 | break; | |
1061 | ||
1062 | if (!skip || !string_list_has_string(skip, extra_refname)) | |
1063 | return extra_refname; | |
fa5b1830 | 1064 | } |
0845122c DT |
1065 | return NULL; |
1066 | } | |
fa5b1830 | 1067 | |
0845122c DT |
1068 | int rename_ref_available(const char *oldname, const char *newname) |
1069 | { | |
1070 | struct string_list skip = STRING_LIST_INIT_NODUP; | |
1071 | struct strbuf err = STRBUF_INIT; | |
1072 | int ret; | |
fa5b1830 | 1073 | |
0845122c DT |
1074 | string_list_insert(&skip, oldname); |
1075 | ret = !verify_refname_available(newname, NULL, &skip, &err); | |
1076 | if (!ret) | |
1077 | error("%s", err.buf); | |
1078 | ||
1079 | string_list_clear(&skip, 0); | |
1080 | strbuf_release(&err); | |
1081 | return ret; | |
fa5b1830 | 1082 | } |
2bf68ed5 DT |
1083 | |
1084 | int head_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1085 | { | |
1086 | struct object_id oid; | |
1087 | int flag; | |
1088 | ||
1089 | if (submodule) { | |
1090 | if (resolve_gitlink_ref(submodule, "HEAD", oid.hash) == 0) | |
1091 | return fn("HEAD", &oid, 0, cb_data); | |
1092 | ||
1093 | return 0; | |
1094 | } | |
1095 | ||
1096 | if (!read_ref_full("HEAD", RESOLVE_REF_READING, oid.hash, &flag)) | |
1097 | return fn("HEAD", &oid, flag, cb_data); | |
1098 | ||
1099 | return 0; | |
1100 | } | |
1101 | ||
1102 | int head_ref(each_ref_fn fn, void *cb_data) | |
1103 | { | |
1104 | return head_ref_submodule(NULL, fn, cb_data); | |
1105 | } | |
93770590 DT |
1106 | |
1107 | int for_each_ref(each_ref_fn fn, void *cb_data) | |
1108 | { | |
1109 | return do_for_each_ref(NULL, "", fn, 0, 0, cb_data); | |
1110 | } | |
1111 | ||
1112 | int for_each_ref_submodule(const char *submodule, each_ref_fn fn, void *cb_data) | |
1113 | { | |
1114 | return do_for_each_ref(submodule, "", fn, 0, 0, cb_data); | |
1115 | } | |
1116 | ||
1117 | int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data) | |
1118 | { | |
1119 | return do_for_each_ref(NULL, prefix, fn, strlen(prefix), 0, cb_data); | |
1120 | } | |
1121 | ||
1122 | int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken) | |
1123 | { | |
1124 | unsigned int flag = 0; | |
1125 | ||
1126 | if (broken) | |
1127 | flag = DO_FOR_EACH_INCLUDE_BROKEN; | |
1128 | return do_for_each_ref(NULL, prefix, fn, 0, flag, cb_data); | |
1129 | } | |
1130 | ||
1131 | int for_each_ref_in_submodule(const char *submodule, const char *prefix, | |
1132 | each_ref_fn fn, void *cb_data) | |
1133 | { | |
1134 | return do_for_each_ref(submodule, prefix, fn, strlen(prefix), 0, cb_data); | |
1135 | } | |
1136 | ||
1137 | int for_each_replace_ref(each_ref_fn fn, void *cb_data) | |
1138 | { | |
1139 | return do_for_each_ref(NULL, git_replace_ref_base, fn, | |
1140 | strlen(git_replace_ref_base), 0, cb_data); | |
1141 | } | |
1142 | ||
1143 | int for_each_namespaced_ref(each_ref_fn fn, void *cb_data) | |
1144 | { | |
1145 | struct strbuf buf = STRBUF_INIT; | |
1146 | int ret; | |
1147 | strbuf_addf(&buf, "%srefs/", get_git_namespace()); | |
1148 | ret = do_for_each_ref(NULL, buf.buf, fn, 0, 0, cb_data); | |
1149 | strbuf_release(&buf); | |
1150 | return ret; | |
1151 | } | |
1152 | ||
1153 | int for_each_rawref(each_ref_fn fn, void *cb_data) | |
1154 | { | |
1155 | return do_for_each_ref(NULL, "", fn, 0, | |
1156 | DO_FOR_EACH_INCLUDE_BROKEN, cb_data); | |
1157 | } | |
2d0663b2 DT |
1158 | |
1159 | /* This function needs to return a meaningful errno on failure */ | |
1160 | const char *resolve_ref_unsafe(const char *refname, int resolve_flags, | |
1161 | unsigned char *sha1, int *flags) | |
1162 | { | |
1163 | static struct strbuf sb_refname = STRBUF_INIT; | |
1164 | int unused_flags; | |
1165 | int symref_count; | |
1166 | ||
1167 | if (!flags) | |
1168 | flags = &unused_flags; | |
1169 | ||
1170 | *flags = 0; | |
1171 | ||
1172 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1173 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1174 | !refname_is_safe(refname)) { | |
1175 | errno = EINVAL; | |
1176 | return NULL; | |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | * dwim_ref() uses REF_ISBROKEN to distinguish between | |
1181 | * missing refs and refs that were present but invalid, | |
1182 | * to complain about the latter to stderr. | |
1183 | * | |
1184 | * We don't know whether the ref exists, so don't set | |
1185 | * REF_ISBROKEN yet. | |
1186 | */ | |
1187 | *flags |= REF_BAD_NAME; | |
1188 | } | |
1189 | ||
1190 | for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) { | |
1191 | unsigned int read_flags = 0; | |
1192 | ||
1193 | if (read_raw_ref(refname, sha1, &sb_refname, &read_flags)) { | |
1194 | *flags |= read_flags; | |
1195 | if (errno != ENOENT || (resolve_flags & RESOLVE_REF_READING)) | |
1196 | return NULL; | |
1197 | hashclr(sha1); | |
1198 | if (*flags & REF_BAD_NAME) | |
1199 | *flags |= REF_ISBROKEN; | |
1200 | return refname; | |
1201 | } | |
1202 | ||
1203 | *flags |= read_flags; | |
1204 | ||
1205 | if (!(read_flags & REF_ISSYMREF)) { | |
1206 | if (*flags & REF_BAD_NAME) { | |
1207 | hashclr(sha1); | |
1208 | *flags |= REF_ISBROKEN; | |
1209 | } | |
1210 | return refname; | |
1211 | } | |
1212 | ||
1213 | refname = sb_refname.buf; | |
1214 | if (resolve_flags & RESOLVE_REF_NO_RECURSE) { | |
1215 | hashclr(sha1); | |
1216 | return refname; | |
1217 | } | |
1218 | if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) { | |
1219 | if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) || | |
1220 | !refname_is_safe(refname)) { | |
1221 | errno = EINVAL; | |
1222 | return NULL; | |
1223 | } | |
1224 | ||
1225 | *flags |= REF_ISBROKEN | REF_BAD_NAME; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | errno = ELOOP; | |
1230 | return NULL; | |
1231 | } |