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Commit | Line | Data |
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86ab7f0c MH |
1 | /* |
2 | * Handle git attributes. See gitattributes(5) for a description of | |
3a1b3415 | 3 | * the file syntax, and attr.h for a description of the API. |
86ab7f0c MH |
4 | * |
5 | * One basic design decision here is that we are not going to support | |
6 | * an insanely large number of attributes. | |
7 | */ | |
8 | ||
d0bfd026 | 9 | #include "cache.h" |
36bf1958 | 10 | #include "alloc.h" |
b2141fc1 | 11 | #include "config.h" |
32a8f510 | 12 | #include "environment.h" |
d807c4a0 | 13 | #include "exec-cmd.h" |
d0bfd026 | 14 | #include "attr.h" |
6eba6210 | 15 | #include "dir.h" |
f394e093 | 16 | #include "gettext.h" |
27547e5f | 17 | #include "utf8.h" |
860a74d9 | 18 | #include "quote.h" |
47cfc9bd KN |
19 | #include "revision.h" |
20 | #include "object-store.h" | |
e38da487 | 21 | #include "setup.h" |
1a600b75 | 22 | #include "thread-utils.h" |
d0bfd026 | 23 | |
a5e92abd JH |
24 | const char git_attr__true[] = "(builtin)true"; |
25 | const char git_attr__false[] = "\0(builtin)false"; | |
26 | static const char git_attr__unknown[] = "(builtin)unknown"; | |
27 | #define ATTR__TRUE git_attr__true | |
28 | #define ATTR__FALSE git_attr__false | |
29 | #define ATTR__UNSET NULL | |
30 | #define ATTR__UNKNOWN git_attr__unknown | |
515106fa | 31 | |
d0bfd026 | 32 | struct git_attr { |
e1e12e97 | 33 | unsigned int attr_nr; /* unique attribute number */ |
1a600b75 | 34 | char name[FLEX_ARRAY]; /* attribute name */ |
d0bfd026 | 35 | }; |
7d42ec54 | 36 | |
ec4d77aa | 37 | const char *git_attr_name(const struct git_attr *attr) |
352404ac MH |
38 | { |
39 | return attr->name; | |
40 | } | |
41 | ||
1a600b75 BW |
42 | struct attr_hashmap { |
43 | struct hashmap map; | |
1a600b75 | 44 | pthread_mutex_t mutex; |
1a600b75 BW |
45 | }; |
46 | ||
47 | static inline void hashmap_lock(struct attr_hashmap *map) | |
48 | { | |
1a600b75 | 49 | pthread_mutex_lock(&map->mutex); |
1a600b75 BW |
50 | } |
51 | ||
52 | static inline void hashmap_unlock(struct attr_hashmap *map) | |
d0bfd026 | 53 | { |
1a600b75 | 54 | pthread_mutex_unlock(&map->mutex); |
1a600b75 | 55 | } |
d0bfd026 | 56 | |
1a600b75 BW |
57 | /* The container for objects stored in "struct attr_hashmap" */ |
58 | struct attr_hash_entry { | |
e2b5038d | 59 | struct hashmap_entry ent; |
1a600b75 BW |
60 | const char *key; /* the key; memory should be owned by value */ |
61 | size_t keylen; /* length of the key */ | |
62 | void *value; /* the stored value */ | |
63 | }; | |
64 | ||
65 | /* attr_hashmap comparison function */ | |
5cf88fd8 | 66 | static int attr_hash_entry_cmp(const void *cmp_data UNUSED, |
939af16e EW |
67 | const struct hashmap_entry *eptr, |
68 | const struct hashmap_entry *entry_or_key, | |
5cf88fd8 | 69 | const void *keydata UNUSED) |
1a600b75 | 70 | { |
939af16e EW |
71 | const struct attr_hash_entry *a, *b; |
72 | ||
73 | a = container_of(eptr, const struct attr_hash_entry, ent); | |
74 | b = container_of(entry_or_key, const struct attr_hash_entry, ent); | |
1a600b75 BW |
75 | return (a->keylen != b->keylen) || strncmp(a->key, b->key, a->keylen); |
76 | } | |
77 | ||
b19315d8 EN |
78 | /* |
79 | * The global dictionary of all interned attributes. This | |
80 | * is a singleton object which is shared between threads. | |
81 | * Access to this dictionary must be surrounded with a mutex. | |
82 | */ | |
83 | static struct attr_hashmap g_attr_hashmap = { | |
50103649 | 84 | .map = HASHMAP_INIT(attr_hash_entry_cmp, NULL), |
b19315d8 | 85 | }; |
1a600b75 BW |
86 | |
87 | /* | |
88 | * Retrieve the 'value' stored in a hashmap given the provided 'key'. | |
89 | * If there is no matching entry, return NULL. | |
90 | */ | |
91 | static void *attr_hashmap_get(struct attr_hashmap *map, | |
92 | const char *key, size_t keylen) | |
93 | { | |
94 | struct attr_hash_entry k; | |
95 | struct attr_hash_entry *e; | |
96 | ||
d22245a2 | 97 | hashmap_entry_init(&k.ent, memhash(key, keylen)); |
1a600b75 BW |
98 | k.key = key; |
99 | k.keylen = keylen; | |
404ab78e | 100 | e = hashmap_get_entry(&map->map, &k, ent, NULL); |
1a600b75 BW |
101 | |
102 | return e ? e->value : NULL; | |
103 | } | |
104 | ||
105 | /* Add 'value' to a hashmap based on the provided 'key'. */ | |
106 | static void attr_hashmap_add(struct attr_hashmap *map, | |
107 | const char *key, size_t keylen, | |
108 | void *value) | |
109 | { | |
110 | struct attr_hash_entry *e; | |
111 | ||
1a600b75 | 112 | e = xmalloc(sizeof(struct attr_hash_entry)); |
d22245a2 | 113 | hashmap_entry_init(&e->ent, memhash(key, keylen)); |
1a600b75 BW |
114 | e->key = key; |
115 | e->keylen = keylen; | |
116 | e->value = value; | |
117 | ||
b94e5c1d | 118 | hashmap_add(&map->map, &e->ent); |
d0bfd026 JH |
119 | } |
120 | ||
685b2925 BW |
121 | struct all_attrs_item { |
122 | const struct git_attr *attr; | |
123 | const char *value; | |
60a12722 BW |
124 | /* |
125 | * If 'macro' is non-NULL, indicates that 'attr' is a macro based on | |
126 | * the current attribute stack and contains a pointer to the match_attr | |
127 | * definition of the macro | |
128 | */ | |
129 | const struct match_attr *macro; | |
685b2925 BW |
130 | }; |
131 | ||
132 | /* | |
133 | * Reallocate and reinitialize the array of all attributes (which is used in | |
134 | * the attribute collection process) in 'check' based on the global dictionary | |
135 | * of attributes. | |
136 | */ | |
137 | static void all_attrs_init(struct attr_hashmap *map, struct attr_check *check) | |
138 | { | |
139 | int i; | |
8b604d19 | 140 | unsigned int size; |
685b2925 BW |
141 | |
142 | hashmap_lock(map); | |
143 | ||
8b604d19 JH |
144 | size = hashmap_get_size(&map->map); |
145 | if (size < check->all_attrs_nr) | |
033abf97 | 146 | BUG("interned attributes shouldn't be deleted"); |
685b2925 BW |
147 | |
148 | /* | |
149 | * If the number of attributes in the global dictionary has increased | |
150 | * (or this attr_check instance doesn't have an initialized all_attrs | |
151 | * field), reallocate the provided attr_check instance's all_attrs | |
152 | * field and fill each entry with its corresponding git_attr. | |
153 | */ | |
8b604d19 | 154 | if (size != check->all_attrs_nr) { |
685b2925 BW |
155 | struct attr_hash_entry *e; |
156 | struct hashmap_iter iter; | |
685b2925 | 157 | |
8b604d19 JH |
158 | REALLOC_ARRAY(check->all_attrs, size); |
159 | check->all_attrs_nr = size; | |
685b2925 | 160 | |
87571c3f | 161 | hashmap_for_each_entry(&map->map, &iter, e, |
87571c3f | 162 | ent /* member name */) { |
685b2925 BW |
163 | const struct git_attr *a = e->value; |
164 | check->all_attrs[a->attr_nr].attr = a; | |
165 | } | |
166 | } | |
167 | ||
168 | hashmap_unlock(map); | |
169 | ||
170 | /* | |
171 | * Re-initialize every entry in check->all_attrs. | |
172 | * This re-initialization can live outside of the locked region since | |
173 | * the attribute dictionary is no longer being accessed. | |
174 | */ | |
175 | for (i = 0; i < check->all_attrs_nr; i++) { | |
176 | check->all_attrs[i].value = ATTR__UNKNOWN; | |
60a12722 | 177 | check->all_attrs[i].macro = NULL; |
685b2925 BW |
178 | } |
179 | } | |
180 | ||
428103c7 | 181 | static int attr_name_valid(const char *name, size_t namelen) |
e4aee10a JH |
182 | { |
183 | /* | |
d42453ab MH |
184 | * Attribute name cannot begin with '-' and must consist of |
185 | * characters from [-A-Za-z0-9_.]. | |
e4aee10a | 186 | */ |
c0b13b21 | 187 | if (namelen <= 0 || *name == '-') |
428103c7 | 188 | return 0; |
e4aee10a JH |
189 | while (namelen--) { |
190 | char ch = *name++; | |
191 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
192 | ('0' <= ch && ch <= '9') || | |
193 | ('a' <= ch && ch <= 'z') || | |
194 | ('A' <= ch && ch <= 'Z')) ) | |
428103c7 | 195 | return 0; |
e4aee10a | 196 | } |
428103c7 JH |
197 | return 1; |
198 | } | |
199 | ||
200 | static void report_invalid_attr(const char *name, size_t len, | |
201 | const char *src, int lineno) | |
202 | { | |
203 | struct strbuf err = STRBUF_INIT; | |
204 | strbuf_addf(&err, _("%.*s is not a valid attribute name"), | |
205 | (int) len, name); | |
206 | fprintf(stderr, "%s: %s:%d\n", err.buf, src, lineno); | |
207 | strbuf_release(&err); | |
e4aee10a JH |
208 | } |
209 | ||
1a600b75 BW |
210 | /* |
211 | * Given a 'name', lookup and return the corresponding attribute in the global | |
212 | * dictionary. If no entry is found, create a new attribute and store it in | |
213 | * the dictionary. | |
214 | */ | |
eb22e7df | 215 | static const struct git_attr *git_attr_internal(const char *name, size_t namelen) |
d0bfd026 | 216 | { |
d0bfd026 JH |
217 | struct git_attr *a; |
218 | ||
1a600b75 | 219 | if (!attr_name_valid(name, namelen)) |
e4aee10a JH |
220 | return NULL; |
221 | ||
1a600b75 BW |
222 | hashmap_lock(&g_attr_hashmap); |
223 | ||
224 | a = attr_hashmap_get(&g_attr_hashmap, name, namelen); | |
225 | ||
226 | if (!a) { | |
227 | FLEX_ALLOC_MEM(a, name, name, namelen); | |
8b604d19 | 228 | a->attr_nr = hashmap_get_size(&g_attr_hashmap.map); |
1a600b75 BW |
229 | |
230 | attr_hashmap_add(&g_attr_hashmap, a->name, namelen, a); | |
e1e12e97 PS |
231 | if (a->attr_nr != hashmap_get_size(&g_attr_hashmap.map) - 1) |
232 | die(_("unable to add additional attribute")); | |
1a600b75 BW |
233 | } |
234 | ||
235 | hashmap_unlock(&g_attr_hashmap); | |
f48fd688 | 236 | |
d0bfd026 JH |
237 | return a; |
238 | } | |
239 | ||
e810e063 | 240 | const struct git_attr *git_attr(const char *name) |
7fb0eaa2 JH |
241 | { |
242 | return git_attr_internal(name, strlen(name)); | |
243 | } | |
244 | ||
515106fa | 245 | /* What does a matched pattern decide? */ |
d0bfd026 | 246 | struct attr_state { |
e810e063 | 247 | const struct git_attr *attr; |
a5e92abd | 248 | const char *setto; |
d0bfd026 JH |
249 | }; |
250 | ||
82dce998 NTND |
251 | struct pattern { |
252 | const char *pattern; | |
253 | int patternlen; | |
254 | int nowildcardlen; | |
4ff89ee5 | 255 | unsigned flags; /* PATTERN_FLAG_* */ |
82dce998 NTND |
256 | }; |
257 | ||
ba845b75 MH |
258 | /* |
259 | * One rule, as from a .gitattributes file. | |
260 | * | |
261 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
262 | * defined. | |
263 | * | |
4894f4ff JH |
264 | * If is_macro is false, then u.pat is the filename pattern to which the |
265 | * rule applies. | |
ba845b75 MH |
266 | * |
267 | * In either case, num_attr is the number of attributes affected by | |
268 | * this rule, and state is an array listing them. The attributes are | |
269 | * listed as they appear in the file (macros unexpanded). | |
270 | */ | |
d0bfd026 | 271 | struct match_attr { |
f48fd688 | 272 | union { |
82dce998 | 273 | struct pattern pat; |
e810e063 | 274 | const struct git_attr *attr; |
f48fd688 JH |
275 | } u; |
276 | char is_macro; | |
34ace8ba | 277 | size_t num_attr; |
d0bfd026 JH |
278 | struct attr_state state[FLEX_ARRAY]; |
279 | }; | |
280 | ||
281 | static const char blank[] = " \t\r\n"; | |
282 | ||
dbf387d5 JK |
283 | /* Flags usable in read_attr() and parse_attr_line() family of functions. */ |
284 | #define READ_ATTR_MACRO_OK (1<<0) | |
2ef579e2 | 285 | #define READ_ATTR_NOFOLLOW (1<<1) |
dbf387d5 | 286 | |
d1751298 MH |
287 | /* |
288 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
289 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
290 | * If e is not NULL, write the results to *e. Return a pointer to the | |
291 | * remainder of the string (with leading whitespace removed), or NULL | |
292 | * if there was an error. | |
293 | */ | |
515106fa | 294 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
d1751298 | 295 | struct attr_state *e) |
515106fa JH |
296 | { |
297 | const char *ep, *equals; | |
24557209 | 298 | size_t len; |
515106fa JH |
299 | |
300 | ep = cp + strcspn(cp, blank); | |
301 | equals = strchr(cp, '='); | |
302 | if (equals && ep < equals) | |
303 | equals = NULL; | |
304 | if (equals) | |
305 | len = equals - cp; | |
306 | else | |
307 | len = ep - cp; | |
d1751298 | 308 | if (!e) { |
515106fa JH |
309 | if (*cp == '-' || *cp == '!') { |
310 | cp++; | |
311 | len--; | |
312 | } | |
428103c7 JH |
313 | if (!attr_name_valid(cp, len)) { |
314 | report_invalid_attr(cp, len, src, lineno); | |
515106fa JH |
315 | return NULL; |
316 | } | |
317 | } else { | |
5a884019 JH |
318 | /* |
319 | * As this function is always called twice, once with | |
320 | * e == NULL in the first pass and then e != NULL in | |
428103c7 | 321 | * the second pass, no need for attr_name_valid() |
5a884019 JH |
322 | * check here. |
323 | */ | |
515106fa JH |
324 | if (*cp == '-' || *cp == '!') { |
325 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
326 | cp++; | |
327 | len--; | |
328 | } | |
329 | else if (!equals) | |
330 | e->setto = ATTR__TRUE; | |
331 | else { | |
182af834 | 332 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 333 | } |
7fb0eaa2 | 334 | e->attr = git_attr_internal(cp, len); |
515106fa | 335 | } |
515106fa JH |
336 | return ep + strspn(ep, blank); |
337 | } | |
338 | ||
f48fd688 | 339 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
dbf387d5 | 340 | int lineno, unsigned flags) |
d0bfd026 | 341 | { |
34ace8ba | 342 | size_t namelen, num_attr, i; |
85c4a0d0 | 343 | const char *cp, *name, *states; |
515106fa | 344 | struct match_attr *res = NULL; |
f48fd688 | 345 | int is_macro; |
860a74d9 | 346 | struct strbuf pattern = STRBUF_INIT; |
d0bfd026 JH |
347 | |
348 | cp = line + strspn(line, blank); | |
349 | if (!*cp || *cp == '#') | |
350 | return NULL; | |
351 | name = cp; | |
860a74d9 | 352 | |
dfa6b32b PS |
353 | if (strlen(line) >= ATTR_MAX_LINE_LENGTH) { |
354 | warning(_("ignoring overly long attributes line %d"), lineno); | |
355 | return NULL; | |
356 | } | |
357 | ||
860a74d9 NTND |
358 | if (*cp == '"' && !unquote_c_style(&pattern, name, &states)) { |
359 | name = pattern.buf; | |
360 | namelen = pattern.len; | |
361 | } else { | |
362 | namelen = strcspn(name, blank); | |
363 | states = name + namelen; | |
364 | } | |
365 | ||
f48fd688 | 366 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && |
59556548 | 367 | starts_with(name, ATTRIBUTE_MACRO_PREFIX)) { |
dbf387d5 | 368 | if (!(flags & READ_ATTR_MACRO_OK)) { |
ad8f8f4a NTND |
369 | fprintf_ln(stderr, _("%s not allowed: %s:%d"), |
370 | name, src, lineno); | |
62af8969 | 371 | goto fail_return; |
f48fd688 JH |
372 | } |
373 | is_macro = 1; | |
374 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
375 | name += strspn(name, blank); | |
376 | namelen = strcspn(name, blank); | |
428103c7 JH |
377 | if (!attr_name_valid(name, namelen)) { |
378 | report_invalid_attr(name, namelen, src, lineno); | |
62af8969 | 379 | goto fail_return; |
e4aee10a | 380 | } |
f48fd688 JH |
381 | } |
382 | else | |
383 | is_macro = 0; | |
d0bfd026 | 384 | |
85c4a0d0 MH |
385 | states += strspn(states, blank); |
386 | ||
d68e1c18 MH |
387 | /* First pass to count the attr_states */ |
388 | for (cp = states, num_attr = 0; *cp; num_attr++) { | |
389 | cp = parse_attr(src, lineno, cp, NULL); | |
390 | if (!cp) | |
62af8969 | 391 | goto fail_return; |
d0bfd026 | 392 | } |
d68e1c18 | 393 | |
a60a66e4 PS |
394 | res = xcalloc(1, st_add3(sizeof(*res), |
395 | st_mult(sizeof(struct attr_state), num_attr), | |
396 | is_macro ? 0 : namelen + 1)); | |
fad32bcd | 397 | if (is_macro) { |
d68e1c18 | 398 | res->u.attr = git_attr_internal(name, namelen); |
fad32bcd | 399 | } else { |
82dce998 NTND |
400 | char *p = (char *)&(res->state[num_attr]); |
401 | memcpy(p, name, namelen); | |
402 | res->u.pat.pattern = p; | |
65edd96a | 403 | parse_path_pattern(&res->u.pat.pattern, |
82dce998 NTND |
404 | &res->u.pat.patternlen, |
405 | &res->u.pat.flags, | |
406 | &res->u.pat.nowildcardlen); | |
4ff89ee5 | 407 | if (res->u.pat.flags & PATTERN_FLAG_NEGATIVE) { |
8b1bd024 TR |
408 | warning(_("Negative patterns are ignored in git attributes\n" |
409 | "Use '\\!' for literal leading exclamation.")); | |
62af8969 | 410 | goto fail_return; |
8b1bd024 | 411 | } |
d0bfd026 | 412 | } |
d68e1c18 MH |
413 | res->is_macro = is_macro; |
414 | res->num_attr = num_attr; | |
415 | ||
416 | /* Second pass to fill the attr_states */ | |
417 | for (cp = states, i = 0; *cp; i++) { | |
418 | cp = parse_attr(src, lineno, cp, &(res->state[i])); | |
419 | } | |
420 | ||
860a74d9 | 421 | strbuf_release(&pattern); |
d0bfd026 | 422 | return res; |
62af8969 JH |
423 | |
424 | fail_return: | |
860a74d9 | 425 | strbuf_release(&pattern); |
62af8969 JH |
426 | free(res); |
427 | return NULL; | |
d0bfd026 JH |
428 | } |
429 | ||
430 | /* | |
431 | * Like info/exclude and .gitignore, the attribute information can | |
432 | * come from many places. | |
433 | * | |
bb101aaf RD |
434 | * (1) .gitattributes file of the same directory; |
435 | * (2) .gitattributes file of the parent directory if (1) does not have | |
515106fa JH |
436 | * any match; this goes recursively upwards, just like .gitignore. |
437 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
438 | * |
439 | * In the same file, later entries override the earlier match, so in the | |
440 | * global list, we would have entries from info/attributes the earliest | |
bb101aaf | 441 | * (reading the file from top to bottom), .gitattributes of the root |
d0bfd026 JH |
442 | * directory (again, reading the file from top to bottom) down to the |
443 | * current directory, and then scan the list backwards to find the first match. | |
6d24e7a8 | 444 | * This is exactly the same as what is_excluded() does in dir.c to deal with |
6f416cba | 445 | * .gitignore file and info/excludes file as a fallback. |
d0bfd026 JH |
446 | */ |
447 | ||
dc81cf37 | 448 | struct attr_stack { |
d0bfd026 JH |
449 | struct attr_stack *prev; |
450 | char *origin; | |
cd6a0b26 | 451 | size_t originlen; |
d0bfd026 | 452 | unsigned num_matches; |
a4413118 | 453 | unsigned alloc; |
d0bfd026 | 454 | struct match_attr **attrs; |
dc81cf37 | 455 | }; |
d0bfd026 | 456 | |
dc81cf37 | 457 | static void attr_stack_free(struct attr_stack *e) |
d0bfd026 | 458 | { |
447ac906 | 459 | unsigned i; |
d0bfd026 | 460 | free(e->origin); |
515106fa JH |
461 | for (i = 0; i < e->num_matches; i++) { |
462 | struct match_attr *a = e->attrs[i]; | |
34ace8ba PS |
463 | size_t j; |
464 | ||
515106fa | 465 | for (j = 0; j < a->num_attr; j++) { |
a5e92abd | 466 | const char *setto = a->state[j].setto; |
515106fa JH |
467 | if (setto == ATTR__TRUE || |
468 | setto == ATTR__FALSE || | |
469 | setto == ATTR__UNSET || | |
470 | setto == ATTR__UNKNOWN) | |
471 | ; | |
472 | else | |
4b25d091 | 473 | free((char *) setto); |
515106fa JH |
474 | } |
475 | free(a); | |
476 | } | |
37475f97 | 477 | free(e->attrs); |
d0bfd026 JH |
478 | free(e); |
479 | } | |
480 | ||
dc81cf37 BW |
481 | static void drop_attr_stack(struct attr_stack **stack) |
482 | { | |
483 | while (*stack) { | |
484 | struct attr_stack *elem = *stack; | |
485 | *stack = elem->prev; | |
486 | attr_stack_free(elem); | |
487 | } | |
488 | } | |
489 | ||
490 | /* List of all attr_check structs; access should be surrounded by mutex */ | |
491 | static struct check_vector { | |
492 | size_t nr; | |
493 | size_t alloc; | |
494 | struct attr_check **checks; | |
dc81cf37 | 495 | pthread_mutex_t mutex; |
dc81cf37 BW |
496 | } check_vector; |
497 | ||
498 | static inline void vector_lock(void) | |
499 | { | |
dc81cf37 | 500 | pthread_mutex_lock(&check_vector.mutex); |
dc81cf37 BW |
501 | } |
502 | ||
503 | static inline void vector_unlock(void) | |
504 | { | |
dc81cf37 | 505 | pthread_mutex_unlock(&check_vector.mutex); |
dc81cf37 BW |
506 | } |
507 | ||
508 | static void check_vector_add(struct attr_check *c) | |
509 | { | |
510 | vector_lock(); | |
511 | ||
512 | ALLOC_GROW(check_vector.checks, | |
513 | check_vector.nr + 1, | |
514 | check_vector.alloc); | |
515 | check_vector.checks[check_vector.nr++] = c; | |
516 | ||
517 | vector_unlock(); | |
518 | } | |
519 | ||
520 | static void check_vector_remove(struct attr_check *check) | |
521 | { | |
522 | int i; | |
523 | ||
524 | vector_lock(); | |
525 | ||
526 | /* Find entry */ | |
527 | for (i = 0; i < check_vector.nr; i++) | |
528 | if (check_vector.checks[i] == check) | |
529 | break; | |
530 | ||
531 | if (i >= check_vector.nr) | |
033abf97 | 532 | BUG("no entry found"); |
dc81cf37 BW |
533 | |
534 | /* shift entries over */ | |
535 | for (; i < check_vector.nr - 1; i++) | |
536 | check_vector.checks[i] = check_vector.checks[i + 1]; | |
537 | ||
538 | check_vector.nr--; | |
539 | ||
540 | vector_unlock(); | |
541 | } | |
542 | ||
543 | /* Iterate through all attr_check instances and drop their stacks */ | |
544 | static void drop_all_attr_stacks(void) | |
545 | { | |
546 | int i; | |
547 | ||
548 | vector_lock(); | |
549 | ||
550 | for (i = 0; i < check_vector.nr; i++) { | |
551 | drop_attr_stack(&check_vector.checks[i]->stack); | |
552 | } | |
553 | ||
554 | vector_unlock(); | |
555 | } | |
556 | ||
37293768 JH |
557 | struct attr_check *attr_check_alloc(void) |
558 | { | |
dc81cf37 BW |
559 | struct attr_check *c = xcalloc(1, sizeof(struct attr_check)); |
560 | ||
561 | /* save pointer to the check struct */ | |
562 | check_vector_add(c); | |
563 | ||
564 | return c; | |
37293768 JH |
565 | } |
566 | ||
567 | struct attr_check *attr_check_initl(const char *one, ...) | |
568 | { | |
569 | struct attr_check *check; | |
570 | int cnt; | |
571 | va_list params; | |
572 | const char *param; | |
573 | ||
574 | va_start(params, one); | |
575 | for (cnt = 1; (param = va_arg(params, const char *)) != NULL; cnt++) | |
576 | ; | |
577 | va_end(params); | |
578 | ||
579 | check = attr_check_alloc(); | |
580 | check->nr = cnt; | |
581 | check->alloc = cnt; | |
ca56dadb | 582 | CALLOC_ARRAY(check->items, cnt); |
37293768 JH |
583 | |
584 | check->items[0].attr = git_attr(one); | |
585 | va_start(params, one); | |
586 | for (cnt = 1; cnt < check->nr; cnt++) { | |
587 | const struct git_attr *attr; | |
588 | param = va_arg(params, const char *); | |
589 | if (!param) | |
033abf97 | 590 | BUG("counted %d != ended at %d", |
37293768 JH |
591 | check->nr, cnt); |
592 | attr = git_attr(param); | |
593 | if (!attr) | |
033abf97 | 594 | BUG("%s: not a valid attribute name", param); |
37293768 JH |
595 | check->items[cnt].attr = attr; |
596 | } | |
597 | va_end(params); | |
598 | return check; | |
599 | } | |
600 | ||
b0db7046 BW |
601 | struct attr_check *attr_check_dup(const struct attr_check *check) |
602 | { | |
603 | struct attr_check *ret; | |
604 | ||
605 | if (!check) | |
606 | return NULL; | |
607 | ||
608 | ret = attr_check_alloc(); | |
609 | ||
610 | ret->nr = check->nr; | |
611 | ret->alloc = check->alloc; | |
6e578410 | 612 | DUP_ARRAY(ret->items, check->items, ret->nr); |
b0db7046 BW |
613 | |
614 | return ret; | |
615 | } | |
616 | ||
37293768 JH |
617 | struct attr_check_item *attr_check_append(struct attr_check *check, |
618 | const struct git_attr *attr) | |
619 | { | |
620 | struct attr_check_item *item; | |
621 | ||
622 | ALLOC_GROW(check->items, check->nr + 1, check->alloc); | |
623 | item = &check->items[check->nr++]; | |
624 | item->attr = attr; | |
625 | return item; | |
626 | } | |
627 | ||
628 | void attr_check_reset(struct attr_check *check) | |
629 | { | |
630 | check->nr = 0; | |
631 | } | |
632 | ||
633 | void attr_check_clear(struct attr_check *check) | |
634 | { | |
6a83d902 | 635 | FREE_AND_NULL(check->items); |
37293768 JH |
636 | check->alloc = 0; |
637 | check->nr = 0; | |
685b2925 | 638 | |
6a83d902 | 639 | FREE_AND_NULL(check->all_attrs); |
685b2925 | 640 | check->all_attrs_nr = 0; |
dc81cf37 BW |
641 | |
642 | drop_attr_stack(&check->stack); | |
37293768 JH |
643 | } |
644 | ||
645 | void attr_check_free(struct attr_check *check) | |
646 | { | |
dc81cf37 BW |
647 | if (check) { |
648 | /* Remove check from the check vector */ | |
649 | check_vector_remove(check); | |
650 | ||
651 | attr_check_clear(check); | |
652 | free(check); | |
653 | } | |
37293768 JH |
654 | } |
655 | ||
d0bfd026 | 656 | static const char *builtin_attr[] = { |
155a4b71 | 657 | "[attr]binary -diff -merge -text", |
d0bfd026 JH |
658 | NULL, |
659 | }; | |
660 | ||
a4413118 JH |
661 | static void handle_attr_line(struct attr_stack *res, |
662 | const char *line, | |
663 | const char *src, | |
664 | int lineno, | |
dbf387d5 | 665 | unsigned flags) |
a4413118 JH |
666 | { |
667 | struct match_attr *a; | |
668 | ||
dbf387d5 | 669 | a = parse_attr_line(line, src, lineno, flags); |
a4413118 JH |
670 | if (!a) |
671 | return; | |
447ac906 PS |
672 | ALLOC_GROW_BY(res->attrs, res->num_matches, 1, res->alloc); |
673 | res->attrs[res->num_matches - 1] = a; | |
a4413118 JH |
674 | } |
675 | ||
d0bfd026 JH |
676 | static struct attr_stack *read_attr_from_array(const char **list) |
677 | { | |
678 | struct attr_stack *res; | |
679 | const char *line; | |
f48fd688 | 680 | int lineno = 0; |
d0bfd026 | 681 | |
ca56dadb | 682 | CALLOC_ARRAY(res, 1); |
a4413118 | 683 | while ((line = *(list++)) != NULL) |
dbf387d5 JK |
684 | handle_attr_line(res, line, "[builtin]", ++lineno, |
685 | READ_ATTR_MACRO_OK); | |
d0bfd026 JH |
686 | return res; |
687 | } | |
688 | ||
7d42ec54 | 689 | /* |
f0dd0421 BW |
690 | * Callers into the attribute system assume there is a single, system-wide |
691 | * global state where attributes are read from and when the state is flipped by | |
692 | * calling git_attr_set_direction(), the stack frames that have been | |
abcb66c6 | 693 | * constructed need to be discarded so that subsequent calls into the |
f0dd0421 BW |
694 | * attribute system will lazily read from the right place. Since changing |
695 | * direction causes a global paradigm shift, it should not ever be called while | |
696 | * another thread could potentially be calling into the attribute system. | |
7d42ec54 | 697 | */ |
06f33c17 | 698 | static enum git_attr_direction direction; |
06f33c17 | 699 | |
c4500e25 | 700 | void git_attr_set_direction(enum git_attr_direction new_direction) |
f0dd0421 BW |
701 | { |
702 | if (is_bare_repository() && new_direction != GIT_ATTR_INDEX) | |
033abf97 | 703 | BUG("non-INDEX attr direction in a bare repo"); |
f0dd0421 BW |
704 | |
705 | if (new_direction != direction) | |
706 | drop_all_attr_stacks(); | |
707 | ||
708 | direction = new_direction; | |
f0dd0421 BW |
709 | } |
710 | ||
dbf387d5 | 711 | static struct attr_stack *read_attr_from_file(const char *path, unsigned flags) |
d0bfd026 | 712 | { |
d74b1fd5 | 713 | struct strbuf buf = STRBUF_INIT; |
2ef579e2 JK |
714 | int fd; |
715 | FILE *fp; | |
d0bfd026 | 716 | struct attr_stack *res; |
f48fd688 | 717 | int lineno = 0; |
3c50032f | 718 | struct stat st; |
d0bfd026 | 719 | |
2ef579e2 JK |
720 | if (flags & READ_ATTR_NOFOLLOW) |
721 | fd = open_nofollow(path, O_RDONLY); | |
722 | else | |
723 | fd = open(path, O_RDONLY); | |
724 | ||
725 | if (fd < 0) { | |
726 | warn_on_fopen_errors(path); | |
a4413118 | 727 | return NULL; |
2ef579e2 JK |
728 | } |
729 | fp = xfdopen(fd, "r"); | |
3c50032f PS |
730 | if (fstat(fd, &st)) { |
731 | warning_errno(_("cannot fstat gitattributes file '%s'"), path); | |
732 | fclose(fp); | |
733 | return NULL; | |
734 | } | |
735 | if (st.st_size >= ATTR_MAX_FILE_SIZE) { | |
736 | warning(_("ignoring overly large gitattributes file '%s'"), path); | |
737 | fclose(fp); | |
738 | return NULL; | |
739 | } | |
2ef579e2 | 740 | |
ca56dadb | 741 | CALLOC_ARRAY(res, 1); |
d74b1fd5 PS |
742 | while (strbuf_getline(&buf, fp) != EOF) { |
743 | if (!lineno && starts_with(buf.buf, utf8_bom)) | |
744 | strbuf_remove(&buf, 0, strlen(utf8_bom)); | |
8a755edd | 745 | handle_attr_line(res, buf.buf, path, ++lineno, flags); |
27547e5f | 746 | } |
d74b1fd5 | 747 | |
a4413118 | 748 | fclose(fp); |
d74b1fd5 | 749 | strbuf_release(&buf); |
a4413118 JH |
750 | return res; |
751 | } | |
d0bfd026 | 752 | |
47cfc9bd KN |
753 | static struct attr_stack *read_attr_from_buf(char *buf, const char *path, |
754 | unsigned flags) | |
a4413118 JH |
755 | { |
756 | struct attr_stack *res; | |
47cfc9bd | 757 | char *sp; |
1a9d7e9b | 758 | int lineno = 0; |
f48fd688 | 759 | |
47cfc9bd KN |
760 | if (!buf) |
761 | return NULL; | |
762 | ||
763 | CALLOC_ARRAY(res, 1); | |
764 | for (sp = buf; *sp;) { | |
765 | char *ep; | |
766 | int more; | |
767 | ||
768 | ep = strchrnul(sp, '\n'); | |
769 | more = (*ep == '\n'); | |
770 | *ep = '\0'; | |
771 | handle_attr_line(res, sp, path, ++lineno, flags); | |
772 | sp = ep + more; | |
773 | } | |
774 | free(buf); | |
775 | ||
776 | return res; | |
777 | } | |
778 | ||
779 | static struct attr_stack *read_attr_from_blob(struct index_state *istate, | |
780 | const struct object_id *tree_oid, | |
781 | const char *path, unsigned flags) | |
782 | { | |
783 | struct object_id oid; | |
784 | unsigned long sz; | |
785 | enum object_type type; | |
786 | void *buf; | |
787 | unsigned short mode; | |
788 | ||
789 | if (!tree_oid) | |
790 | return NULL; | |
791 | ||
792 | if (get_tree_entry(istate->repo, tree_oid, path, &oid, &mode)) | |
793 | return NULL; | |
794 | ||
795 | buf = repo_read_object_file(istate->repo, &oid, &type, &sz); | |
796 | if (!buf || type != OBJ_BLOB) { | |
797 | free(buf); | |
798 | return NULL; | |
799 | } | |
800 | ||
801 | return read_attr_from_buf(buf, path, flags); | |
802 | } | |
803 | ||
804 | static struct attr_stack *read_attr_from_index(struct index_state *istate, | |
805 | const char *path, unsigned flags) | |
806 | { | |
807 | char *buf; | |
37537d64 | 808 | unsigned long size; |
f48fd688 | 809 | |
c4500e25 | 810 | if (!istate) |
7a400a2c NTND |
811 | return NULL; |
812 | ||
77efbb36 DS |
813 | /* |
814 | * The .gitattributes file only applies to files within its | |
815 | * parent directory. In the case of cone-mode sparse-checkout, | |
816 | * the .gitattributes file is sparse if and only if all paths | |
817 | * within that directory are also sparse. Thus, don't load the | |
818 | * .gitattributes file since it will not matter. | |
819 | * | |
820 | * In the case of a sparse index, it is critical that we don't go | |
821 | * looking for a .gitattributes file, as doing so would cause the | |
822 | * index to expand. | |
823 | */ | |
824 | if (!path_in_cone_mode_sparse_checkout(path, istate)) | |
825 | return NULL; | |
826 | ||
3c50032f | 827 | buf = read_blob_data_from_index(istate, path, &size); |
1a9d7e9b | 828 | if (!buf) |
06f33c17 | 829 | return NULL; |
3c50032f PS |
830 | if (size >= ATTR_MAX_FILE_SIZE) { |
831 | warning(_("ignoring overly large gitattributes blob '%s'"), path); | |
832 | return NULL; | |
833 | } | |
1a9d7e9b | 834 | |
47cfc9bd | 835 | return read_attr_from_buf(buf, path, flags); |
d0bfd026 JH |
836 | } |
837 | ||
847a9e5d | 838 | static struct attr_stack *read_attr(struct index_state *istate, |
47cfc9bd | 839 | const struct object_id *tree_oid, |
dbf387d5 | 840 | const char *path, unsigned flags) |
06f33c17 | 841 | { |
0787dafd | 842 | struct attr_stack *res = NULL; |
06f33c17 | 843 | |
0787dafd | 844 | if (direction == GIT_ATTR_INDEX) { |
dbf387d5 | 845 | res = read_attr_from_index(istate, path, flags); |
47cfc9bd KN |
846 | } else if (tree_oid) { |
847 | res = read_attr_from_blob(istate, tree_oid, path, flags); | |
0787dafd BW |
848 | } else if (!is_bare_repository()) { |
849 | if (direction == GIT_ATTR_CHECKOUT) { | |
dbf387d5 | 850 | res = read_attr_from_index(istate, path, flags); |
0787dafd | 851 | if (!res) |
dbf387d5 | 852 | res = read_attr_from_file(path, flags); |
0787dafd | 853 | } else if (direction == GIT_ATTR_CHECKIN) { |
dbf387d5 | 854 | res = read_attr_from_file(path, flags); |
0787dafd BW |
855 | if (!res) |
856 | /* | |
857 | * There is no checked out .gitattributes file | |
858 | * there, but we might have it in the index. | |
859 | * We allow operation in a sparsely checked out | |
860 | * work tree, so read from it. | |
861 | */ | |
dbf387d5 | 862 | res = read_attr_from_index(istate, path, flags); |
0787dafd | 863 | } |
06f33c17 | 864 | } |
0787dafd | 865 | |
06f33c17 | 866 | if (!res) |
ca56dadb | 867 | CALLOC_ARRAY(res, 1); |
06f33c17 JH |
868 | return res; |
869 | } | |
870 | ||
c5147722 | 871 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
872 | { |
873 | static const char *system_wide; | |
874 | if (!system_wide) | |
875 | system_wide = system_path(ETC_GITATTRIBUTES); | |
876 | return system_wide; | |
877 | } | |
878 | ||
dc81cf37 BW |
879 | static const char *get_home_gitattributes(void) |
880 | { | |
881 | if (!git_attributes_file) | |
882 | git_attributes_file = xdg_config_home("attributes"); | |
883 | ||
884 | return git_attributes_file; | |
885 | } | |
886 | ||
c5147722 | 887 | static int git_attr_system(void) |
6df42ab9 PO |
888 | { |
889 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
890 | } | |
891 | ||
f932729c JK |
892 | static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE) |
893 | ||
4c0ce074 JH |
894 | static void push_stack(struct attr_stack **attr_stack_p, |
895 | struct attr_stack *elem, char *origin, size_t originlen) | |
896 | { | |
897 | if (elem) { | |
898 | elem->origin = origin; | |
899 | if (origin) | |
900 | elem->originlen = originlen; | |
901 | elem->prev = *attr_stack_p; | |
902 | *attr_stack_p = elem; | |
903 | } | |
904 | } | |
905 | ||
847a9e5d | 906 | static void bootstrap_attr_stack(struct index_state *istate, |
47cfc9bd | 907 | const struct object_id *tree_oid, |
7a400a2c | 908 | struct attr_stack **stack) |
f48fd688 | 909 | { |
dc81cf37 | 910 | struct attr_stack *e; |
dbf387d5 | 911 | unsigned flags = READ_ATTR_MACRO_OK; |
f48fd688 | 912 | |
dc81cf37 | 913 | if (*stack) |
909ca7b9 | 914 | return; |
f48fd688 | 915 | |
dc81cf37 BW |
916 | /* builtin frame */ |
917 | e = read_attr_from_array(builtin_attr); | |
918 | push_stack(stack, e, NULL, 0); | |
6df42ab9 | 919 | |
dc81cf37 BW |
920 | /* system-wide frame */ |
921 | if (git_attr_system()) { | |
dbf387d5 | 922 | e = read_attr_from_file(git_etc_gitattributes(), flags); |
dc81cf37 BW |
923 | push_stack(stack, e, NULL, 0); |
924 | } | |
f48fd688 | 925 | |
dc81cf37 BW |
926 | /* home directory */ |
927 | if (get_home_gitattributes()) { | |
dbf387d5 | 928 | e = read_attr_from_file(get_home_gitattributes(), flags); |
dc81cf37 | 929 | push_stack(stack, e, NULL, 0); |
f48fd688 | 930 | } |
909ca7b9 | 931 | |
dc81cf37 | 932 | /* root directory */ |
47cfc9bd | 933 | e = read_attr(istate, tree_oid, GITATTRIBUTES_FILE, flags | READ_ATTR_NOFOLLOW); |
dc81cf37 | 934 | push_stack(stack, e, xstrdup(""), 0); |
f0056f64 | 935 | |
dc81cf37 BW |
936 | /* info frame */ |
937 | if (startup_info->have_repository) | |
dbf387d5 | 938 | e = read_attr_from_file(git_path_info_attributes(), flags); |
dc81cf37 BW |
939 | else |
940 | e = NULL; | |
941 | if (!e) | |
ca56dadb | 942 | CALLOC_ARRAY(e, 1); |
dc81cf37 | 943 | push_stack(stack, e, NULL, 0); |
f48fd688 JH |
944 | } |
945 | ||
847a9e5d | 946 | static void prepare_attr_stack(struct index_state *istate, |
47cfc9bd | 947 | const struct object_id *tree_oid, |
7a400a2c | 948 | const char *path, int dirlen, |
dc81cf37 | 949 | struct attr_stack **stack) |
d0bfd026 | 950 | { |
dc81cf37 | 951 | struct attr_stack *info; |
0787dafd | 952 | struct strbuf pathbuf = STRBUF_INIT; |
a8727017 | 953 | |
d0bfd026 JH |
954 | /* |
955 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
956 | * set of attribute definitions, followed by the contents |
957 | * of $(prefix)/etc/gitattributes and a file specified by | |
958 | * core.attributesfile. Then, contents from | |
bb101aaf | 959 | * .gitattributes files from directories closer to the |
d0bfd026 JH |
960 | * root to the ones in deeper directories are pushed |
961 | * to the stack. Finally, at the very top of the stack | |
962 | * we always keep the contents of $GIT_DIR/info/attributes. | |
963 | * | |
964 | * When checking, we use entries from near the top of the | |
965 | * stack, preferring $GIT_DIR/info/attributes, then | |
966 | * .gitattributes in deeper directories to shallower ones, | |
967 | * and finally use the built-in set as the default. | |
968 | */ | |
47cfc9bd | 969 | bootstrap_attr_stack(istate, tree_oid, stack); |
d0bfd026 JH |
970 | |
971 | /* | |
972 | * Pop the "info" one that is always at the top of the stack. | |
973 | */ | |
dc81cf37 BW |
974 | info = *stack; |
975 | *stack = info->prev; | |
d0bfd026 JH |
976 | |
977 | /* | |
978 | * Pop the ones from directories that are not the prefix of | |
c432ef99 JH |
979 | * the path we are checking. Break out of the loop when we see |
980 | * the root one (whose origin is an empty string "") or the builtin | |
981 | * one (whose origin is NULL) without popping it. | |
d0bfd026 | 982 | */ |
dc81cf37 BW |
983 | while ((*stack)->origin) { |
984 | int namelen = (*stack)->originlen; | |
985 | struct attr_stack *elem; | |
d0bfd026 | 986 | |
dc81cf37 | 987 | elem = *stack; |
d0bfd026 | 988 | if (namelen <= dirlen && |
1afca444 JK |
989 | !strncmp(elem->origin, path, namelen) && |
990 | (!namelen || path[namelen] == '/')) | |
d0bfd026 JH |
991 | break; |
992 | ||
dc81cf37 BW |
993 | *stack = elem->prev; |
994 | attr_stack_free(elem); | |
d0bfd026 JH |
995 | } |
996 | ||
997 | /* | |
0787dafd BW |
998 | * bootstrap_attr_stack() should have added, and the |
999 | * above loop should have stopped before popping, the | |
1000 | * root element whose attr_stack->origin is set to an | |
1001 | * empty string. | |
d0bfd026 | 1002 | */ |
0787dafd BW |
1003 | assert((*stack)->origin); |
1004 | ||
1005 | strbuf_addstr(&pathbuf, (*stack)->origin); | |
1006 | /* Build up to the directory 'path' is in */ | |
1007 | while (pathbuf.len < dirlen) { | |
1008 | size_t len = pathbuf.len; | |
1009 | struct attr_stack *next; | |
1010 | char *origin; | |
1011 | ||
1012 | /* Skip path-separator */ | |
1013 | if (len < dirlen && is_dir_sep(path[len])) | |
1014 | len++; | |
1015 | /* Find the end of the next component */ | |
1016 | while (len < dirlen && !is_dir_sep(path[len])) | |
1017 | len++; | |
1018 | ||
1019 | if (pathbuf.len > 0) | |
1020 | strbuf_addch(&pathbuf, '/'); | |
1021 | strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len)); | |
1022 | strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE); | |
1023 | ||
47cfc9bd | 1024 | next = read_attr(istate, tree_oid, pathbuf.buf, READ_ATTR_NOFOLLOW); |
0787dafd BW |
1025 | |
1026 | /* reset the pathbuf to not include "/.gitattributes" */ | |
1027 | strbuf_setlen(&pathbuf, len); | |
1028 | ||
1029 | origin = xstrdup(pathbuf.buf); | |
1030 | push_stack(stack, next, origin, len); | |
97410b27 | 1031 | } |
d4c98565 | 1032 | |
d0bfd026 JH |
1033 | /* |
1034 | * Finally push the "info" one at the top of the stack. | |
1035 | */ | |
dc81cf37 | 1036 | push_stack(stack, info, NULL, 0); |
0787dafd BW |
1037 | |
1038 | strbuf_release(&pathbuf); | |
d0bfd026 JH |
1039 | } |
1040 | ||
1041 | static int path_matches(const char *pathname, int pathlen, | |
bd2f371d | 1042 | int basename_offset, |
82dce998 | 1043 | const struct pattern *pat, |
d0bfd026 JH |
1044 | const char *base, int baselen) |
1045 | { | |
82dce998 NTND |
1046 | const char *pattern = pat->pattern; |
1047 | int prefix = pat->nowildcardlen; | |
dc09e9ec | 1048 | int isdir = (pathlen && pathname[pathlen - 1] == '/'); |
82dce998 | 1049 | |
4ff89ee5 | 1050 | if ((pat->flags & PATTERN_FLAG_MUSTBEDIR) && !isdir) |
94bc671a JNA |
1051 | return 0; |
1052 | ||
4ff89ee5 | 1053 | if (pat->flags & PATTERN_FLAG_NODIR) { |
bd2f371d | 1054 | return match_basename(pathname + basename_offset, |
dc09e9ec | 1055 | pathlen - basename_offset - isdir, |
82dce998 NTND |
1056 | pattern, prefix, |
1057 | pat->patternlen, pat->flags); | |
d0bfd026 | 1058 | } |
dc09e9ec | 1059 | return match_pathname(pathname, pathlen - isdir, |
82dce998 | 1060 | base, baselen, |
77651c03 | 1061 | pattern, prefix, pat->patternlen); |
d0bfd026 JH |
1062 | } |
1063 | ||
685b2925 | 1064 | static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem); |
ec775c41 | 1065 | |
69c5f17f | 1066 | static int fill_one(struct all_attrs_item *all_attrs, |
60a12722 | 1067 | const struct match_attr *a, int rem) |
515106fa | 1068 | { |
34ace8ba | 1069 | size_t i; |
515106fa | 1070 | |
34ace8ba PS |
1071 | for (i = a->num_attr; rem > 0 && i > 0; i--) { |
1072 | const struct git_attr *attr = a->state[i - 1].attr; | |
685b2925 | 1073 | const char **n = &(all_attrs[attr->attr_nr].value); |
34ace8ba | 1074 | const char *v = a->state[i - 1].setto; |
515106fa JH |
1075 | |
1076 | if (*n == ATTR__UNKNOWN) { | |
515106fa JH |
1077 | *n = v; |
1078 | rem--; | |
685b2925 | 1079 | rem = macroexpand_one(all_attrs, attr->attr_nr, rem); |
515106fa JH |
1080 | } |
1081 | } | |
1082 | return rem; | |
1083 | } | |
1084 | ||
bd2f371d | 1085 | static int fill(const char *path, int pathlen, int basename_offset, |
dc81cf37 BW |
1086 | const struct attr_stack *stack, |
1087 | struct all_attrs_item *all_attrs, int rem) | |
d0bfd026 | 1088 | { |
dc81cf37 | 1089 | for (; rem > 0 && stack; stack = stack->prev) { |
447ac906 | 1090 | unsigned i; |
dc81cf37 BW |
1091 | const char *base = stack->origin ? stack->origin : ""; |
1092 | ||
447ac906 PS |
1093 | for (i = stack->num_matches; 0 < rem && 0 < i; i--) { |
1094 | const struct match_attr *a = stack->attrs[i - 1]; | |
dc81cf37 BW |
1095 | if (a->is_macro) |
1096 | continue; | |
1097 | if (path_matches(path, pathlen, basename_offset, | |
1098 | &a->u.pat, base, stack->originlen)) | |
69c5f17f | 1099 | rem = fill_one(all_attrs, a, rem); |
dc81cf37 | 1100 | } |
d0bfd026 | 1101 | } |
dc81cf37 | 1102 | |
d0bfd026 JH |
1103 | return rem; |
1104 | } | |
1105 | ||
685b2925 | 1106 | static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem) |
f48fd688 | 1107 | { |
60a12722 | 1108 | const struct all_attrs_item *item = &all_attrs[nr]; |
f48fd688 | 1109 | |
60a12722 | 1110 | if (item->macro && item->value == ATTR__TRUE) |
69c5f17f | 1111 | return fill_one(all_attrs, item->macro, rem); |
60a12722 | 1112 | else |
ec775c41 | 1113 | return rem; |
60a12722 | 1114 | } |
ec775c41 | 1115 | |
60a12722 BW |
1116 | /* |
1117 | * Marks the attributes which are macros based on the attribute stack. | |
1118 | * This prevents having to search through the attribute stack each time | |
1119 | * a macro needs to be expanded during the fill stage. | |
1120 | */ | |
1121 | static void determine_macros(struct all_attrs_item *all_attrs, | |
1122 | const struct attr_stack *stack) | |
1123 | { | |
1124 | for (; stack; stack = stack->prev) { | |
447ac906 PS |
1125 | unsigned i; |
1126 | for (i = stack->num_matches; i > 0; i--) { | |
1127 | const struct match_attr *ma = stack->attrs[i - 1]; | |
60a12722 | 1128 | if (ma->is_macro) { |
e1e12e97 | 1129 | unsigned int n = ma->u.attr->attr_nr; |
60a12722 BW |
1130 | if (!all_attrs[n].macro) { |
1131 | all_attrs[n].macro = ma; | |
1132 | } | |
1133 | } | |
ec775c41 | 1134 | } |
4b0c6961 | 1135 | } |
f48fd688 JH |
1136 | } |
1137 | ||
2d721744 | 1138 | /* |
685b2925 BW |
1139 | * Collect attributes for path into the array pointed to by check->all_attrs. |
1140 | * If check->check_nr is non-zero, only attributes in check[] are collected. | |
1141 | * Otherwise all attributes are collected. | |
2d721744 | 1142 | */ |
847a9e5d | 1143 | static void collect_some_attrs(struct index_state *istate, |
47cfc9bd KN |
1144 | const struct object_id *tree_oid, |
1145 | const char *path, struct attr_check *check) | |
d0bfd026 | 1146 | { |
7b95849b | 1147 | int pathlen, rem, dirlen; |
bd2f371d JH |
1148 | const char *cp, *last_slash = NULL; |
1149 | int basename_offset; | |
9db9eecf NTND |
1150 | |
1151 | for (cp = path; *cp; cp++) { | |
1152 | if (*cp == '/' && cp[1]) | |
1153 | last_slash = cp; | |
1154 | } | |
1155 | pathlen = cp - path; | |
1156 | if (last_slash) { | |
bd2f371d | 1157 | basename_offset = last_slash + 1 - path; |
9db9eecf NTND |
1158 | dirlen = last_slash - path; |
1159 | } else { | |
bd2f371d | 1160 | basename_offset = 0; |
9db9eecf NTND |
1161 | dirlen = 0; |
1162 | } | |
d0bfd026 | 1163 | |
47cfc9bd | 1164 | prepare_attr_stack(istate, tree_oid, path, dirlen, &check->stack); |
685b2925 | 1165 | all_attrs_init(&g_attr_hashmap, check); |
dc81cf37 | 1166 | determine_macros(check->all_attrs, check->stack); |
685b2925 | 1167 | |
685b2925 | 1168 | rem = check->all_attrs_nr; |
dc81cf37 | 1169 | fill(path, pathlen, basename_offset, check->stack, check->all_attrs, rem); |
2d721744 MH |
1170 | } |
1171 | ||
847a9e5d | 1172 | void git_check_attr(struct index_state *istate, |
47cfc9bd | 1173 | const struct object_id *tree_oid, const char *path, |
d64324cb | 1174 | struct attr_check *check) |
2d721744 MH |
1175 | { |
1176 | int i; | |
1177 | ||
47cfc9bd | 1178 | collect_some_attrs(istate, tree_oid, path, check); |
f48fd688 | 1179 | |
6bc2e3f7 | 1180 | for (i = 0; i < check->nr; i++) { |
e1e12e97 | 1181 | unsigned int n = check->items[i].attr->attr_nr; |
685b2925 | 1182 | const char *value = check->all_attrs[n].value; |
515106fa JH |
1183 | if (value == ATTR__UNKNOWN) |
1184 | value = ATTR__UNSET; | |
6bc2e3f7 | 1185 | check->items[i].value = value; |
515106fa | 1186 | } |
d0bfd026 | 1187 | } |
06f33c17 | 1188 | |
47cfc9bd | 1189 | void git_all_attrs(struct index_state *istate, const struct object_id *tree_oid, |
7a400a2c | 1190 | const char *path, struct attr_check *check) |
ee548df3 | 1191 | { |
7f864111 | 1192 | int i; |
ee548df3 | 1193 | |
7f864111 | 1194 | attr_check_reset(check); |
47cfc9bd | 1195 | collect_some_attrs(istate, tree_oid, path, check); |
ee548df3 | 1196 | |
685b2925 BW |
1197 | for (i = 0; i < check->all_attrs_nr; i++) { |
1198 | const char *name = check->all_attrs[i].attr->name; | |
1199 | const char *value = check->all_attrs[i].value; | |
7f864111 JH |
1200 | struct attr_check_item *item; |
1201 | if (value == ATTR__UNSET || value == ATTR__UNKNOWN) | |
1202 | continue; | |
1203 | item = attr_check_append(check, git_attr(name)); | |
1204 | item->value = value; | |
ee548df3 | 1205 | } |
ee548df3 MH |
1206 | } |
1207 | ||
1a600b75 BW |
1208 | void attr_start(void) |
1209 | { | |
1a600b75 | 1210 | pthread_mutex_init(&g_attr_hashmap.mutex, NULL); |
dc81cf37 | 1211 | pthread_mutex_init(&check_vector.mutex, NULL); |
1a600b75 | 1212 | } |