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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" |
b2141fc1 | 10 | #include "config.h" |
d807c4a0 | 11 | #include "exec-cmd.h" |
d0bfd026 | 12 | #include "attr.h" |
6eba6210 | 13 | #include "dir.h" |
27547e5f | 14 | #include "utf8.h" |
860a74d9 | 15 | #include "quote.h" |
1a600b75 | 16 | #include "thread-utils.h" |
d0bfd026 | 17 | |
a5e92abd JH |
18 | const char git_attr__true[] = "(builtin)true"; |
19 | const char git_attr__false[] = "\0(builtin)false"; | |
20 | static const char git_attr__unknown[] = "(builtin)unknown"; | |
21 | #define ATTR__TRUE git_attr__true | |
22 | #define ATTR__FALSE git_attr__false | |
23 | #define ATTR__UNSET NULL | |
24 | #define ATTR__UNKNOWN git_attr__unknown | |
515106fa | 25 | |
d0bfd026 JH |
26 | #ifndef DEBUG_ATTR |
27 | #define DEBUG_ATTR 0 | |
28 | #endif | |
29 | ||
30 | struct git_attr { | |
e1e12e97 | 31 | unsigned int attr_nr; /* unique attribute number */ |
1a600b75 | 32 | char name[FLEX_ARRAY]; /* attribute name */ |
d0bfd026 | 33 | }; |
7d42ec54 | 34 | |
ec4d77aa | 35 | const char *git_attr_name(const struct git_attr *attr) |
352404ac MH |
36 | { |
37 | return attr->name; | |
38 | } | |
39 | ||
1a600b75 BW |
40 | struct attr_hashmap { |
41 | struct hashmap map; | |
1a600b75 | 42 | pthread_mutex_t mutex; |
1a600b75 BW |
43 | }; |
44 | ||
45 | static inline void hashmap_lock(struct attr_hashmap *map) | |
46 | { | |
1a600b75 | 47 | pthread_mutex_lock(&map->mutex); |
1a600b75 BW |
48 | } |
49 | ||
50 | static inline void hashmap_unlock(struct attr_hashmap *map) | |
d0bfd026 | 51 | { |
1a600b75 | 52 | pthread_mutex_unlock(&map->mutex); |
1a600b75 | 53 | } |
d0bfd026 | 54 | |
1a600b75 BW |
55 | /* The container for objects stored in "struct attr_hashmap" */ |
56 | struct attr_hash_entry { | |
e2b5038d | 57 | struct hashmap_entry ent; |
1a600b75 BW |
58 | const char *key; /* the key; memory should be owned by value */ |
59 | size_t keylen; /* length of the key */ | |
60 | void *value; /* the stored value */ | |
61 | }; | |
62 | ||
63 | /* attr_hashmap comparison function */ | |
201c14e3 | 64 | static int attr_hash_entry_cmp(const void *unused_cmp_data, |
939af16e EW |
65 | const struct hashmap_entry *eptr, |
66 | const struct hashmap_entry *entry_or_key, | |
201c14e3 | 67 | const void *unused_keydata) |
1a600b75 | 68 | { |
939af16e EW |
69 | const struct attr_hash_entry *a, *b; |
70 | ||
71 | a = container_of(eptr, const struct attr_hash_entry, ent); | |
72 | b = container_of(entry_or_key, const struct attr_hash_entry, ent); | |
1a600b75 BW |
73 | return (a->keylen != b->keylen) || strncmp(a->key, b->key, a->keylen); |
74 | } | |
75 | ||
b19315d8 EN |
76 | /* |
77 | * The global dictionary of all interned attributes. This | |
78 | * is a singleton object which is shared between threads. | |
79 | * Access to this dictionary must be surrounded with a mutex. | |
80 | */ | |
81 | static struct attr_hashmap g_attr_hashmap = { | |
82 | HASHMAP_INIT(attr_hash_entry_cmp, NULL) | |
83 | }; | |
1a600b75 BW |
84 | |
85 | /* | |
86 | * Retrieve the 'value' stored in a hashmap given the provided 'key'. | |
87 | * If there is no matching entry, return NULL. | |
88 | */ | |
89 | static void *attr_hashmap_get(struct attr_hashmap *map, | |
90 | const char *key, size_t keylen) | |
91 | { | |
92 | struct attr_hash_entry k; | |
93 | struct attr_hash_entry *e; | |
94 | ||
d22245a2 | 95 | hashmap_entry_init(&k.ent, memhash(key, keylen)); |
1a600b75 BW |
96 | k.key = key; |
97 | k.keylen = keylen; | |
404ab78e | 98 | e = hashmap_get_entry(&map->map, &k, ent, NULL); |
1a600b75 BW |
99 | |
100 | return e ? e->value : NULL; | |
101 | } | |
102 | ||
103 | /* Add 'value' to a hashmap based on the provided 'key'. */ | |
104 | static void attr_hashmap_add(struct attr_hashmap *map, | |
105 | const char *key, size_t keylen, | |
106 | void *value) | |
107 | { | |
108 | struct attr_hash_entry *e; | |
109 | ||
1a600b75 | 110 | e = xmalloc(sizeof(struct attr_hash_entry)); |
d22245a2 | 111 | hashmap_entry_init(&e->ent, memhash(key, keylen)); |
1a600b75 BW |
112 | e->key = key; |
113 | e->keylen = keylen; | |
114 | e->value = value; | |
115 | ||
b94e5c1d | 116 | hashmap_add(&map->map, &e->ent); |
d0bfd026 JH |
117 | } |
118 | ||
685b2925 BW |
119 | struct all_attrs_item { |
120 | const struct git_attr *attr; | |
121 | const char *value; | |
60a12722 BW |
122 | /* |
123 | * If 'macro' is non-NULL, indicates that 'attr' is a macro based on | |
124 | * the current attribute stack and contains a pointer to the match_attr | |
125 | * definition of the macro | |
126 | */ | |
127 | const struct match_attr *macro; | |
685b2925 BW |
128 | }; |
129 | ||
130 | /* | |
131 | * Reallocate and reinitialize the array of all attributes (which is used in | |
132 | * the attribute collection process) in 'check' based on the global dictionary | |
133 | * of attributes. | |
134 | */ | |
135 | static void all_attrs_init(struct attr_hashmap *map, struct attr_check *check) | |
136 | { | |
137 | int i; | |
8b604d19 | 138 | unsigned int size; |
685b2925 BW |
139 | |
140 | hashmap_lock(map); | |
141 | ||
8b604d19 JH |
142 | size = hashmap_get_size(&map->map); |
143 | if (size < check->all_attrs_nr) | |
033abf97 | 144 | BUG("interned attributes shouldn't be deleted"); |
685b2925 BW |
145 | |
146 | /* | |
147 | * If the number of attributes in the global dictionary has increased | |
148 | * (or this attr_check instance doesn't have an initialized all_attrs | |
149 | * field), reallocate the provided attr_check instance's all_attrs | |
150 | * field and fill each entry with its corresponding git_attr. | |
151 | */ | |
8b604d19 | 152 | if (size != check->all_attrs_nr) { |
685b2925 BW |
153 | struct attr_hash_entry *e; |
154 | struct hashmap_iter iter; | |
685b2925 | 155 | |
8b604d19 JH |
156 | REALLOC_ARRAY(check->all_attrs, size); |
157 | check->all_attrs_nr = size; | |
685b2925 | 158 | |
87571c3f | 159 | hashmap_for_each_entry(&map->map, &iter, e, |
87571c3f | 160 | ent /* member name */) { |
685b2925 BW |
161 | const struct git_attr *a = e->value; |
162 | check->all_attrs[a->attr_nr].attr = a; | |
163 | } | |
164 | } | |
165 | ||
166 | hashmap_unlock(map); | |
167 | ||
168 | /* | |
169 | * Re-initialize every entry in check->all_attrs. | |
170 | * This re-initialization can live outside of the locked region since | |
171 | * the attribute dictionary is no longer being accessed. | |
172 | */ | |
173 | for (i = 0; i < check->all_attrs_nr; i++) { | |
174 | check->all_attrs[i].value = ATTR__UNKNOWN; | |
60a12722 | 175 | check->all_attrs[i].macro = NULL; |
685b2925 BW |
176 | } |
177 | } | |
178 | ||
428103c7 | 179 | static int attr_name_valid(const char *name, size_t namelen) |
e4aee10a JH |
180 | { |
181 | /* | |
d42453ab MH |
182 | * Attribute name cannot begin with '-' and must consist of |
183 | * characters from [-A-Za-z0-9_.]. | |
e4aee10a | 184 | */ |
c0b13b21 | 185 | if (namelen <= 0 || *name == '-') |
428103c7 | 186 | return 0; |
e4aee10a JH |
187 | while (namelen--) { |
188 | char ch = *name++; | |
189 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
190 | ('0' <= ch && ch <= '9') || | |
191 | ('a' <= ch && ch <= 'z') || | |
192 | ('A' <= ch && ch <= 'Z')) ) | |
428103c7 | 193 | return 0; |
e4aee10a | 194 | } |
428103c7 JH |
195 | return 1; |
196 | } | |
197 | ||
198 | static void report_invalid_attr(const char *name, size_t len, | |
199 | const char *src, int lineno) | |
200 | { | |
201 | struct strbuf err = STRBUF_INIT; | |
202 | strbuf_addf(&err, _("%.*s is not a valid attribute name"), | |
203 | (int) len, name); | |
204 | fprintf(stderr, "%s: %s:%d\n", err.buf, src, lineno); | |
205 | strbuf_release(&err); | |
e4aee10a JH |
206 | } |
207 | ||
1a600b75 BW |
208 | /* |
209 | * Given a 'name', lookup and return the corresponding attribute in the global | |
210 | * dictionary. If no entry is found, create a new attribute and store it in | |
211 | * the dictionary. | |
212 | */ | |
eb22e7df | 213 | static const struct git_attr *git_attr_internal(const char *name, size_t namelen) |
d0bfd026 | 214 | { |
d0bfd026 JH |
215 | struct git_attr *a; |
216 | ||
1a600b75 | 217 | if (!attr_name_valid(name, namelen)) |
e4aee10a JH |
218 | return NULL; |
219 | ||
1a600b75 BW |
220 | hashmap_lock(&g_attr_hashmap); |
221 | ||
222 | a = attr_hashmap_get(&g_attr_hashmap, name, namelen); | |
223 | ||
224 | if (!a) { | |
225 | FLEX_ALLOC_MEM(a, name, name, namelen); | |
8b604d19 | 226 | a->attr_nr = hashmap_get_size(&g_attr_hashmap.map); |
1a600b75 BW |
227 | |
228 | attr_hashmap_add(&g_attr_hashmap, a->name, namelen, a); | |
e1e12e97 PS |
229 | if (a->attr_nr != hashmap_get_size(&g_attr_hashmap.map) - 1) |
230 | die(_("unable to add additional attribute")); | |
1a600b75 BW |
231 | } |
232 | ||
233 | hashmap_unlock(&g_attr_hashmap); | |
f48fd688 | 234 | |
d0bfd026 JH |
235 | return a; |
236 | } | |
237 | ||
e810e063 | 238 | const struct git_attr *git_attr(const char *name) |
7fb0eaa2 JH |
239 | { |
240 | return git_attr_internal(name, strlen(name)); | |
241 | } | |
242 | ||
515106fa | 243 | /* What does a matched pattern decide? */ |
d0bfd026 | 244 | struct attr_state { |
e810e063 | 245 | const struct git_attr *attr; |
a5e92abd | 246 | const char *setto; |
d0bfd026 JH |
247 | }; |
248 | ||
82dce998 NTND |
249 | struct pattern { |
250 | const char *pattern; | |
251 | int patternlen; | |
252 | int nowildcardlen; | |
4ff89ee5 | 253 | unsigned flags; /* PATTERN_FLAG_* */ |
82dce998 NTND |
254 | }; |
255 | ||
ba845b75 MH |
256 | /* |
257 | * One rule, as from a .gitattributes file. | |
258 | * | |
259 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
260 | * defined. | |
261 | * | |
4894f4ff JH |
262 | * If is_macro is false, then u.pat is the filename pattern to which the |
263 | * rule applies. | |
ba845b75 MH |
264 | * |
265 | * In either case, num_attr is the number of attributes affected by | |
266 | * this rule, and state is an array listing them. The attributes are | |
267 | * listed as they appear in the file (macros unexpanded). | |
268 | */ | |
d0bfd026 | 269 | struct match_attr { |
f48fd688 | 270 | union { |
82dce998 | 271 | struct pattern pat; |
e810e063 | 272 | const struct git_attr *attr; |
f48fd688 JH |
273 | } u; |
274 | char is_macro; | |
34ace8ba | 275 | size_t num_attr; |
d0bfd026 JH |
276 | struct attr_state state[FLEX_ARRAY]; |
277 | }; | |
278 | ||
279 | static const char blank[] = " \t\r\n"; | |
280 | ||
d1751298 MH |
281 | /* |
282 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
283 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
284 | * If e is not NULL, write the results to *e. Return a pointer to the | |
285 | * remainder of the string (with leading whitespace removed), or NULL | |
286 | * if there was an error. | |
287 | */ | |
515106fa | 288 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
d1751298 | 289 | struct attr_state *e) |
515106fa JH |
290 | { |
291 | const char *ep, *equals; | |
24557209 | 292 | size_t len; |
515106fa JH |
293 | |
294 | ep = cp + strcspn(cp, blank); | |
295 | equals = strchr(cp, '='); | |
296 | if (equals && ep < equals) | |
297 | equals = NULL; | |
298 | if (equals) | |
299 | len = equals - cp; | |
300 | else | |
301 | len = ep - cp; | |
d1751298 | 302 | if (!e) { |
515106fa JH |
303 | if (*cp == '-' || *cp == '!') { |
304 | cp++; | |
305 | len--; | |
306 | } | |
428103c7 JH |
307 | if (!attr_name_valid(cp, len)) { |
308 | report_invalid_attr(cp, len, src, lineno); | |
515106fa JH |
309 | return NULL; |
310 | } | |
311 | } else { | |
5a884019 JH |
312 | /* |
313 | * As this function is always called twice, once with | |
314 | * e == NULL in the first pass and then e != NULL in | |
428103c7 | 315 | * the second pass, no need for attr_name_valid() |
5a884019 JH |
316 | * check here. |
317 | */ | |
515106fa JH |
318 | if (*cp == '-' || *cp == '!') { |
319 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
320 | cp++; | |
321 | len--; | |
322 | } | |
323 | else if (!equals) | |
324 | e->setto = ATTR__TRUE; | |
325 | else { | |
182af834 | 326 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 327 | } |
7fb0eaa2 | 328 | e->attr = git_attr_internal(cp, len); |
515106fa | 329 | } |
515106fa JH |
330 | return ep + strspn(ep, blank); |
331 | } | |
332 | ||
f48fd688 JH |
333 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
334 | int lineno, int macro_ok) | |
d0bfd026 | 335 | { |
34ace8ba | 336 | size_t namelen, num_attr, i; |
85c4a0d0 | 337 | const char *cp, *name, *states; |
515106fa | 338 | struct match_attr *res = NULL; |
f48fd688 | 339 | int is_macro; |
860a74d9 | 340 | struct strbuf pattern = STRBUF_INIT; |
d0bfd026 JH |
341 | |
342 | cp = line + strspn(line, blank); | |
343 | if (!*cp || *cp == '#') | |
344 | return NULL; | |
345 | name = cp; | |
860a74d9 | 346 | |
dfa6b32b PS |
347 | if (strlen(line) >= ATTR_MAX_LINE_LENGTH) { |
348 | warning(_("ignoring overly long attributes line %d"), lineno); | |
349 | return NULL; | |
350 | } | |
351 | ||
860a74d9 NTND |
352 | if (*cp == '"' && !unquote_c_style(&pattern, name, &states)) { |
353 | name = pattern.buf; | |
354 | namelen = pattern.len; | |
355 | } else { | |
356 | namelen = strcspn(name, blank); | |
357 | states = name + namelen; | |
358 | } | |
359 | ||
f48fd688 | 360 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && |
59556548 | 361 | starts_with(name, ATTRIBUTE_MACRO_PREFIX)) { |
f48fd688 | 362 | if (!macro_ok) { |
ad8f8f4a NTND |
363 | fprintf_ln(stderr, _("%s not allowed: %s:%d"), |
364 | name, src, lineno); | |
62af8969 | 365 | goto fail_return; |
f48fd688 JH |
366 | } |
367 | is_macro = 1; | |
368 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
369 | name += strspn(name, blank); | |
370 | namelen = strcspn(name, blank); | |
428103c7 JH |
371 | if (!attr_name_valid(name, namelen)) { |
372 | report_invalid_attr(name, namelen, src, lineno); | |
62af8969 | 373 | goto fail_return; |
e4aee10a | 374 | } |
f48fd688 JH |
375 | } |
376 | else | |
377 | is_macro = 0; | |
d0bfd026 | 378 | |
85c4a0d0 MH |
379 | states += strspn(states, blank); |
380 | ||
d68e1c18 MH |
381 | /* First pass to count the attr_states */ |
382 | for (cp = states, num_attr = 0; *cp; num_attr++) { | |
383 | cp = parse_attr(src, lineno, cp, NULL); | |
384 | if (!cp) | |
62af8969 | 385 | goto fail_return; |
d0bfd026 | 386 | } |
d68e1c18 | 387 | |
a60a66e4 PS |
388 | res = xcalloc(1, st_add3(sizeof(*res), |
389 | st_mult(sizeof(struct attr_state), num_attr), | |
390 | is_macro ? 0 : namelen + 1)); | |
fad32bcd | 391 | if (is_macro) { |
d68e1c18 | 392 | res->u.attr = git_attr_internal(name, namelen); |
fad32bcd | 393 | } else { |
82dce998 NTND |
394 | char *p = (char *)&(res->state[num_attr]); |
395 | memcpy(p, name, namelen); | |
396 | res->u.pat.pattern = p; | |
65edd96a | 397 | parse_path_pattern(&res->u.pat.pattern, |
82dce998 NTND |
398 | &res->u.pat.patternlen, |
399 | &res->u.pat.flags, | |
400 | &res->u.pat.nowildcardlen); | |
4ff89ee5 | 401 | if (res->u.pat.flags & PATTERN_FLAG_NEGATIVE) { |
8b1bd024 TR |
402 | warning(_("Negative patterns are ignored in git attributes\n" |
403 | "Use '\\!' for literal leading exclamation.")); | |
62af8969 | 404 | goto fail_return; |
8b1bd024 | 405 | } |
d0bfd026 | 406 | } |
d68e1c18 MH |
407 | res->is_macro = is_macro; |
408 | res->num_attr = num_attr; | |
409 | ||
410 | /* Second pass to fill the attr_states */ | |
411 | for (cp = states, i = 0; *cp; i++) { | |
412 | cp = parse_attr(src, lineno, cp, &(res->state[i])); | |
413 | } | |
414 | ||
860a74d9 | 415 | strbuf_release(&pattern); |
d0bfd026 | 416 | return res; |
62af8969 JH |
417 | |
418 | fail_return: | |
860a74d9 | 419 | strbuf_release(&pattern); |
62af8969 JH |
420 | free(res); |
421 | return NULL; | |
d0bfd026 JH |
422 | } |
423 | ||
424 | /* | |
425 | * Like info/exclude and .gitignore, the attribute information can | |
426 | * come from many places. | |
427 | * | |
bb101aaf RD |
428 | * (1) .gitattributes file of the same directory; |
429 | * (2) .gitattributes file of the parent directory if (1) does not have | |
515106fa JH |
430 | * any match; this goes recursively upwards, just like .gitignore. |
431 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
432 | * |
433 | * In the same file, later entries override the earlier match, so in the | |
434 | * global list, we would have entries from info/attributes the earliest | |
bb101aaf | 435 | * (reading the file from top to bottom), .gitattributes of the root |
d0bfd026 JH |
436 | * directory (again, reading the file from top to bottom) down to the |
437 | * current directory, and then scan the list backwards to find the first match. | |
6d24e7a8 | 438 | * This is exactly the same as what is_excluded() does in dir.c to deal with |
6f416cba | 439 | * .gitignore file and info/excludes file as a fallback. |
d0bfd026 JH |
440 | */ |
441 | ||
dc81cf37 | 442 | struct attr_stack { |
d0bfd026 JH |
443 | struct attr_stack *prev; |
444 | char *origin; | |
cd6a0b26 | 445 | size_t originlen; |
d0bfd026 | 446 | unsigned num_matches; |
a4413118 | 447 | unsigned alloc; |
d0bfd026 | 448 | struct match_attr **attrs; |
dc81cf37 | 449 | }; |
d0bfd026 | 450 | |
dc81cf37 | 451 | static void attr_stack_free(struct attr_stack *e) |
d0bfd026 | 452 | { |
447ac906 | 453 | unsigned i; |
d0bfd026 | 454 | free(e->origin); |
515106fa JH |
455 | for (i = 0; i < e->num_matches; i++) { |
456 | struct match_attr *a = e->attrs[i]; | |
34ace8ba PS |
457 | size_t j; |
458 | ||
515106fa | 459 | for (j = 0; j < a->num_attr; j++) { |
a5e92abd | 460 | const char *setto = a->state[j].setto; |
515106fa JH |
461 | if (setto == ATTR__TRUE || |
462 | setto == ATTR__FALSE || | |
463 | setto == ATTR__UNSET || | |
464 | setto == ATTR__UNKNOWN) | |
465 | ; | |
466 | else | |
4b25d091 | 467 | free((char *) setto); |
515106fa JH |
468 | } |
469 | free(a); | |
470 | } | |
37475f97 | 471 | free(e->attrs); |
d0bfd026 JH |
472 | free(e); |
473 | } | |
474 | ||
dc81cf37 BW |
475 | static void drop_attr_stack(struct attr_stack **stack) |
476 | { | |
477 | while (*stack) { | |
478 | struct attr_stack *elem = *stack; | |
479 | *stack = elem->prev; | |
480 | attr_stack_free(elem); | |
481 | } | |
482 | } | |
483 | ||
484 | /* List of all attr_check structs; access should be surrounded by mutex */ | |
485 | static struct check_vector { | |
486 | size_t nr; | |
487 | size_t alloc; | |
488 | struct attr_check **checks; | |
dc81cf37 | 489 | pthread_mutex_t mutex; |
dc81cf37 BW |
490 | } check_vector; |
491 | ||
492 | static inline void vector_lock(void) | |
493 | { | |
dc81cf37 | 494 | pthread_mutex_lock(&check_vector.mutex); |
dc81cf37 BW |
495 | } |
496 | ||
497 | static inline void vector_unlock(void) | |
498 | { | |
dc81cf37 | 499 | pthread_mutex_unlock(&check_vector.mutex); |
dc81cf37 BW |
500 | } |
501 | ||
502 | static void check_vector_add(struct attr_check *c) | |
503 | { | |
504 | vector_lock(); | |
505 | ||
506 | ALLOC_GROW(check_vector.checks, | |
507 | check_vector.nr + 1, | |
508 | check_vector.alloc); | |
509 | check_vector.checks[check_vector.nr++] = c; | |
510 | ||
511 | vector_unlock(); | |
512 | } | |
513 | ||
514 | static void check_vector_remove(struct attr_check *check) | |
515 | { | |
516 | int i; | |
517 | ||
518 | vector_lock(); | |
519 | ||
520 | /* Find entry */ | |
521 | for (i = 0; i < check_vector.nr; i++) | |
522 | if (check_vector.checks[i] == check) | |
523 | break; | |
524 | ||
525 | if (i >= check_vector.nr) | |
033abf97 | 526 | BUG("no entry found"); |
dc81cf37 BW |
527 | |
528 | /* shift entries over */ | |
529 | for (; i < check_vector.nr - 1; i++) | |
530 | check_vector.checks[i] = check_vector.checks[i + 1]; | |
531 | ||
532 | check_vector.nr--; | |
533 | ||
534 | vector_unlock(); | |
535 | } | |
536 | ||
537 | /* Iterate through all attr_check instances and drop their stacks */ | |
538 | static void drop_all_attr_stacks(void) | |
539 | { | |
540 | int i; | |
541 | ||
542 | vector_lock(); | |
543 | ||
544 | for (i = 0; i < check_vector.nr; i++) { | |
545 | drop_attr_stack(&check_vector.checks[i]->stack); | |
546 | } | |
547 | ||
548 | vector_unlock(); | |
549 | } | |
550 | ||
37293768 JH |
551 | struct attr_check *attr_check_alloc(void) |
552 | { | |
dc81cf37 BW |
553 | struct attr_check *c = xcalloc(1, sizeof(struct attr_check)); |
554 | ||
555 | /* save pointer to the check struct */ | |
556 | check_vector_add(c); | |
557 | ||
558 | return c; | |
37293768 JH |
559 | } |
560 | ||
561 | struct attr_check *attr_check_initl(const char *one, ...) | |
562 | { | |
563 | struct attr_check *check; | |
564 | int cnt; | |
565 | va_list params; | |
566 | const char *param; | |
567 | ||
568 | va_start(params, one); | |
569 | for (cnt = 1; (param = va_arg(params, const char *)) != NULL; cnt++) | |
570 | ; | |
571 | va_end(params); | |
572 | ||
573 | check = attr_check_alloc(); | |
574 | check->nr = cnt; | |
575 | check->alloc = cnt; | |
576 | check->items = xcalloc(cnt, sizeof(struct attr_check_item)); | |
577 | ||
578 | check->items[0].attr = git_attr(one); | |
579 | va_start(params, one); | |
580 | for (cnt = 1; cnt < check->nr; cnt++) { | |
581 | const struct git_attr *attr; | |
582 | param = va_arg(params, const char *); | |
583 | if (!param) | |
033abf97 | 584 | BUG("counted %d != ended at %d", |
37293768 JH |
585 | check->nr, cnt); |
586 | attr = git_attr(param); | |
587 | if (!attr) | |
033abf97 | 588 | BUG("%s: not a valid attribute name", param); |
37293768 JH |
589 | check->items[cnt].attr = attr; |
590 | } | |
591 | va_end(params); | |
592 | return check; | |
593 | } | |
594 | ||
b0db7046 BW |
595 | struct attr_check *attr_check_dup(const struct attr_check *check) |
596 | { | |
597 | struct attr_check *ret; | |
598 | ||
599 | if (!check) | |
600 | return NULL; | |
601 | ||
602 | ret = attr_check_alloc(); | |
603 | ||
604 | ret->nr = check->nr; | |
605 | ret->alloc = check->alloc; | |
606 | ALLOC_ARRAY(ret->items, ret->nr); | |
607 | COPY_ARRAY(ret->items, check->items, ret->nr); | |
608 | ||
609 | return ret; | |
610 | } | |
611 | ||
37293768 JH |
612 | struct attr_check_item *attr_check_append(struct attr_check *check, |
613 | const struct git_attr *attr) | |
614 | { | |
615 | struct attr_check_item *item; | |
616 | ||
617 | ALLOC_GROW(check->items, check->nr + 1, check->alloc); | |
618 | item = &check->items[check->nr++]; | |
619 | item->attr = attr; | |
620 | return item; | |
621 | } | |
622 | ||
623 | void attr_check_reset(struct attr_check *check) | |
624 | { | |
625 | check->nr = 0; | |
626 | } | |
627 | ||
628 | void attr_check_clear(struct attr_check *check) | |
629 | { | |
6a83d902 | 630 | FREE_AND_NULL(check->items); |
37293768 JH |
631 | check->alloc = 0; |
632 | check->nr = 0; | |
685b2925 | 633 | |
6a83d902 | 634 | FREE_AND_NULL(check->all_attrs); |
685b2925 | 635 | check->all_attrs_nr = 0; |
dc81cf37 BW |
636 | |
637 | drop_attr_stack(&check->stack); | |
37293768 JH |
638 | } |
639 | ||
640 | void attr_check_free(struct attr_check *check) | |
641 | { | |
dc81cf37 BW |
642 | if (check) { |
643 | /* Remove check from the check vector */ | |
644 | check_vector_remove(check); | |
645 | ||
646 | attr_check_clear(check); | |
647 | free(check); | |
648 | } | |
37293768 JH |
649 | } |
650 | ||
d0bfd026 | 651 | static const char *builtin_attr[] = { |
155a4b71 | 652 | "[attr]binary -diff -merge -text", |
d0bfd026 JH |
653 | NULL, |
654 | }; | |
655 | ||
a4413118 JH |
656 | static void handle_attr_line(struct attr_stack *res, |
657 | const char *line, | |
658 | const char *src, | |
659 | int lineno, | |
660 | int macro_ok) | |
661 | { | |
662 | struct match_attr *a; | |
663 | ||
664 | a = parse_attr_line(line, src, lineno, macro_ok); | |
665 | if (!a) | |
666 | return; | |
447ac906 PS |
667 | ALLOC_GROW_BY(res->attrs, res->num_matches, 1, res->alloc); |
668 | res->attrs[res->num_matches - 1] = a; | |
a4413118 JH |
669 | } |
670 | ||
d0bfd026 JH |
671 | static struct attr_stack *read_attr_from_array(const char **list) |
672 | { | |
673 | struct attr_stack *res; | |
674 | const char *line; | |
f48fd688 | 675 | int lineno = 0; |
d0bfd026 JH |
676 | |
677 | res = xcalloc(1, sizeof(*res)); | |
a4413118 JH |
678 | while ((line = *(list++)) != NULL) |
679 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
d0bfd026 JH |
680 | return res; |
681 | } | |
682 | ||
7d42ec54 | 683 | /* |
f0dd0421 BW |
684 | * Callers into the attribute system assume there is a single, system-wide |
685 | * global state where attributes are read from and when the state is flipped by | |
686 | * calling git_attr_set_direction(), the stack frames that have been | |
687 | * constructed need to be discarded so so that subsequent calls into the | |
688 | * attribute system will lazily read from the right place. Since changing | |
689 | * direction causes a global paradigm shift, it should not ever be called while | |
690 | * another thread could potentially be calling into the attribute system. | |
7d42ec54 | 691 | */ |
06f33c17 | 692 | static enum git_attr_direction direction; |
06f33c17 | 693 | |
c4500e25 | 694 | void git_attr_set_direction(enum git_attr_direction new_direction) |
f0dd0421 BW |
695 | { |
696 | if (is_bare_repository() && new_direction != GIT_ATTR_INDEX) | |
033abf97 | 697 | BUG("non-INDEX attr direction in a bare repo"); |
f0dd0421 BW |
698 | |
699 | if (new_direction != direction) | |
700 | drop_all_attr_stacks(); | |
701 | ||
702 | direction = new_direction; | |
f0dd0421 BW |
703 | } |
704 | ||
f48fd688 | 705 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) |
d0bfd026 | 706 | { |
d74b1fd5 | 707 | struct strbuf buf = STRBUF_INIT; |
e9d983f1 | 708 | FILE *fp = fopen_or_warn(path, "r"); |
d0bfd026 | 709 | struct attr_stack *res; |
f48fd688 | 710 | int lineno = 0; |
d0bfd026 | 711 | |
e9d983f1 | 712 | if (!fp) |
a4413118 JH |
713 | return NULL; |
714 | res = xcalloc(1, sizeof(*res)); | |
d74b1fd5 PS |
715 | while (strbuf_getline(&buf, fp) != EOF) { |
716 | if (!lineno && starts_with(buf.buf, utf8_bom)) | |
717 | strbuf_remove(&buf, 0, strlen(utf8_bom)); | |
718 | handle_attr_line(res, buf.buf, path, ++lineno, macro_ok); | |
27547e5f | 719 | } |
d74b1fd5 | 720 | |
a4413118 | 721 | fclose(fp); |
d74b1fd5 | 722 | strbuf_release(&buf); |
a4413118 JH |
723 | return res; |
724 | } | |
d0bfd026 | 725 | |
7a400a2c NTND |
726 | static struct attr_stack *read_attr_from_index(const struct index_state *istate, |
727 | const char *path, | |
728 | int macro_ok) | |
a4413118 JH |
729 | { |
730 | struct attr_stack *res; | |
1a9d7e9b JH |
731 | char *buf, *sp; |
732 | int lineno = 0; | |
f48fd688 | 733 | |
c4500e25 | 734 | if (!istate) |
7a400a2c NTND |
735 | return NULL; |
736 | ||
c4500e25 | 737 | buf = read_blob_data_from_index(istate, path, NULL); |
1a9d7e9b | 738 | if (!buf) |
06f33c17 | 739 | return NULL; |
1a9d7e9b | 740 | |
06f33c17 | 741 | res = xcalloc(1, sizeof(*res)); |
1a9d7e9b JH |
742 | for (sp = buf; *sp; ) { |
743 | char *ep; | |
744 | int more; | |
263434f2 JH |
745 | |
746 | ep = strchrnul(sp, '\n'); | |
1a9d7e9b JH |
747 | more = (*ep == '\n'); |
748 | *ep = '\0'; | |
749 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
750 | sp = ep + more; | |
751 | } | |
752 | free(buf); | |
d0bfd026 JH |
753 | return res; |
754 | } | |
755 | ||
7a400a2c NTND |
756 | static struct attr_stack *read_attr(const struct index_state *istate, |
757 | const char *path, int macro_ok) | |
06f33c17 | 758 | { |
0787dafd | 759 | struct attr_stack *res = NULL; |
06f33c17 | 760 | |
0787dafd | 761 | if (direction == GIT_ATTR_INDEX) { |
7a400a2c | 762 | res = read_attr_from_index(istate, path, macro_ok); |
0787dafd BW |
763 | } else if (!is_bare_repository()) { |
764 | if (direction == GIT_ATTR_CHECKOUT) { | |
7a400a2c | 765 | res = read_attr_from_index(istate, path, macro_ok); |
0787dafd BW |
766 | if (!res) |
767 | res = read_attr_from_file(path, macro_ok); | |
768 | } else if (direction == GIT_ATTR_CHECKIN) { | |
769 | res = read_attr_from_file(path, macro_ok); | |
770 | if (!res) | |
771 | /* | |
772 | * There is no checked out .gitattributes file | |
773 | * there, but we might have it in the index. | |
774 | * We allow operation in a sparsely checked out | |
775 | * work tree, so read from it. | |
776 | */ | |
7a400a2c | 777 | res = read_attr_from_index(istate, path, macro_ok); |
0787dafd | 778 | } |
06f33c17 | 779 | } |
0787dafd | 780 | |
06f33c17 JH |
781 | if (!res) |
782 | res = xcalloc(1, sizeof(*res)); | |
783 | return res; | |
784 | } | |
785 | ||
d0bfd026 JH |
786 | #if DEBUG_ATTR |
787 | static void debug_info(const char *what, struct attr_stack *elem) | |
788 | { | |
789 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
790 | } | |
cf94ccda | 791 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) |
f48fd688 | 792 | { |
515106fa JH |
793 | const char *value = v; |
794 | ||
795 | if (ATTR_TRUE(value)) | |
796 | value = "set"; | |
797 | else if (ATTR_FALSE(value)) | |
798 | value = "unset"; | |
799 | else if (ATTR_UNSET(value)) | |
800 | value = "unspecified"; | |
801 | ||
802 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
803 | what, attr->name, (char *) value, match); | |
f48fd688 | 804 | } |
d0bfd026 JH |
805 | #define debug_push(a) debug_info("push", (a)) |
806 | #define debug_pop(a) debug_info("pop", (a)) | |
807 | #else | |
808 | #define debug_push(a) do { ; } while (0) | |
809 | #define debug_pop(a) do { ; } while (0) | |
f48fd688 | 810 | #define debug_set(a,b,c,d) do { ; } while (0) |
034d35c9 | 811 | #endif /* DEBUG_ATTR */ |
d0bfd026 | 812 | |
c5147722 | 813 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
814 | { |
815 | static const char *system_wide; | |
816 | if (!system_wide) | |
817 | system_wide = system_path(ETC_GITATTRIBUTES); | |
818 | return system_wide; | |
819 | } | |
820 | ||
dc81cf37 BW |
821 | static const char *get_home_gitattributes(void) |
822 | { | |
823 | if (!git_attributes_file) | |
824 | git_attributes_file = xdg_config_home("attributes"); | |
825 | ||
826 | return git_attributes_file; | |
827 | } | |
828 | ||
c5147722 | 829 | static int git_attr_system(void) |
6df42ab9 PO |
830 | { |
831 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
832 | } | |
833 | ||
f932729c JK |
834 | static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE) |
835 | ||
4c0ce074 JH |
836 | static void push_stack(struct attr_stack **attr_stack_p, |
837 | struct attr_stack *elem, char *origin, size_t originlen) | |
838 | { | |
839 | if (elem) { | |
840 | elem->origin = origin; | |
841 | if (origin) | |
842 | elem->originlen = originlen; | |
843 | elem->prev = *attr_stack_p; | |
844 | *attr_stack_p = elem; | |
845 | } | |
846 | } | |
847 | ||
7a400a2c NTND |
848 | static void bootstrap_attr_stack(const struct index_state *istate, |
849 | struct attr_stack **stack) | |
f48fd688 | 850 | { |
dc81cf37 | 851 | struct attr_stack *e; |
f48fd688 | 852 | |
dc81cf37 | 853 | if (*stack) |
909ca7b9 | 854 | return; |
f48fd688 | 855 | |
dc81cf37 BW |
856 | /* builtin frame */ |
857 | e = read_attr_from_array(builtin_attr); | |
858 | push_stack(stack, e, NULL, 0); | |
6df42ab9 | 859 | |
dc81cf37 BW |
860 | /* system-wide frame */ |
861 | if (git_attr_system()) { | |
862 | e = read_attr_from_file(git_etc_gitattributes(), 1); | |
863 | push_stack(stack, e, NULL, 0); | |
864 | } | |
f48fd688 | 865 | |
dc81cf37 BW |
866 | /* home directory */ |
867 | if (get_home_gitattributes()) { | |
868 | e = read_attr_from_file(get_home_gitattributes(), 1); | |
869 | push_stack(stack, e, NULL, 0); | |
f48fd688 | 870 | } |
909ca7b9 | 871 | |
dc81cf37 | 872 | /* root directory */ |
7a400a2c | 873 | e = read_attr(istate, GITATTRIBUTES_FILE, 1); |
dc81cf37 | 874 | push_stack(stack, e, xstrdup(""), 0); |
f0056f64 | 875 | |
dc81cf37 BW |
876 | /* info frame */ |
877 | if (startup_info->have_repository) | |
878 | e = read_attr_from_file(git_path_info_attributes(), 1); | |
879 | else | |
880 | e = NULL; | |
881 | if (!e) | |
882 | e = xcalloc(1, sizeof(struct attr_stack)); | |
883 | push_stack(stack, e, NULL, 0); | |
f48fd688 JH |
884 | } |
885 | ||
7a400a2c NTND |
886 | static void prepare_attr_stack(const struct index_state *istate, |
887 | const char *path, int dirlen, | |
dc81cf37 | 888 | struct attr_stack **stack) |
d0bfd026 | 889 | { |
dc81cf37 | 890 | struct attr_stack *info; |
0787dafd | 891 | struct strbuf pathbuf = STRBUF_INIT; |
a8727017 | 892 | |
d0bfd026 JH |
893 | /* |
894 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
895 | * set of attribute definitions, followed by the contents |
896 | * of $(prefix)/etc/gitattributes and a file specified by | |
897 | * core.attributesfile. Then, contents from | |
bb101aaf | 898 | * .gitattributes files from directories closer to the |
d0bfd026 JH |
899 | * root to the ones in deeper directories are pushed |
900 | * to the stack. Finally, at the very top of the stack | |
901 | * we always keep the contents of $GIT_DIR/info/attributes. | |
902 | * | |
903 | * When checking, we use entries from near the top of the | |
904 | * stack, preferring $GIT_DIR/info/attributes, then | |
905 | * .gitattributes in deeper directories to shallower ones, | |
906 | * and finally use the built-in set as the default. | |
907 | */ | |
7a400a2c | 908 | bootstrap_attr_stack(istate, stack); |
d0bfd026 JH |
909 | |
910 | /* | |
911 | * Pop the "info" one that is always at the top of the stack. | |
912 | */ | |
dc81cf37 BW |
913 | info = *stack; |
914 | *stack = info->prev; | |
d0bfd026 JH |
915 | |
916 | /* | |
917 | * Pop the ones from directories that are not the prefix of | |
c432ef99 JH |
918 | * the path we are checking. Break out of the loop when we see |
919 | * the root one (whose origin is an empty string "") or the builtin | |
920 | * one (whose origin is NULL) without popping it. | |
d0bfd026 | 921 | */ |
dc81cf37 BW |
922 | while ((*stack)->origin) { |
923 | int namelen = (*stack)->originlen; | |
924 | struct attr_stack *elem; | |
d0bfd026 | 925 | |
dc81cf37 | 926 | elem = *stack; |
d0bfd026 | 927 | if (namelen <= dirlen && |
1afca444 JK |
928 | !strncmp(elem->origin, path, namelen) && |
929 | (!namelen || path[namelen] == '/')) | |
d0bfd026 JH |
930 | break; |
931 | ||
932 | debug_pop(elem); | |
dc81cf37 BW |
933 | *stack = elem->prev; |
934 | attr_stack_free(elem); | |
d0bfd026 JH |
935 | } |
936 | ||
937 | /* | |
0787dafd BW |
938 | * bootstrap_attr_stack() should have added, and the |
939 | * above loop should have stopped before popping, the | |
940 | * root element whose attr_stack->origin is set to an | |
941 | * empty string. | |
d0bfd026 | 942 | */ |
0787dafd BW |
943 | assert((*stack)->origin); |
944 | ||
945 | strbuf_addstr(&pathbuf, (*stack)->origin); | |
946 | /* Build up to the directory 'path' is in */ | |
947 | while (pathbuf.len < dirlen) { | |
948 | size_t len = pathbuf.len; | |
949 | struct attr_stack *next; | |
950 | char *origin; | |
951 | ||
952 | /* Skip path-separator */ | |
953 | if (len < dirlen && is_dir_sep(path[len])) | |
954 | len++; | |
955 | /* Find the end of the next component */ | |
956 | while (len < dirlen && !is_dir_sep(path[len])) | |
957 | len++; | |
958 | ||
959 | if (pathbuf.len > 0) | |
960 | strbuf_addch(&pathbuf, '/'); | |
961 | strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len)); | |
962 | strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE); | |
963 | ||
7a400a2c | 964 | next = read_attr(istate, pathbuf.buf, 0); |
0787dafd BW |
965 | |
966 | /* reset the pathbuf to not include "/.gitattributes" */ | |
967 | strbuf_setlen(&pathbuf, len); | |
968 | ||
969 | origin = xstrdup(pathbuf.buf); | |
970 | push_stack(stack, next, origin, len); | |
97410b27 | 971 | } |
d4c98565 | 972 | |
d0bfd026 JH |
973 | /* |
974 | * Finally push the "info" one at the top of the stack. | |
975 | */ | |
dc81cf37 | 976 | push_stack(stack, info, NULL, 0); |
0787dafd BW |
977 | |
978 | strbuf_release(&pathbuf); | |
d0bfd026 JH |
979 | } |
980 | ||
981 | static int path_matches(const char *pathname, int pathlen, | |
bd2f371d | 982 | int basename_offset, |
82dce998 | 983 | const struct pattern *pat, |
d0bfd026 JH |
984 | const char *base, int baselen) |
985 | { | |
82dce998 NTND |
986 | const char *pattern = pat->pattern; |
987 | int prefix = pat->nowildcardlen; | |
dc09e9ec | 988 | int isdir = (pathlen && pathname[pathlen - 1] == '/'); |
82dce998 | 989 | |
4ff89ee5 | 990 | if ((pat->flags & PATTERN_FLAG_MUSTBEDIR) && !isdir) |
94bc671a JNA |
991 | return 0; |
992 | ||
4ff89ee5 | 993 | if (pat->flags & PATTERN_FLAG_NODIR) { |
bd2f371d | 994 | return match_basename(pathname + basename_offset, |
dc09e9ec | 995 | pathlen - basename_offset - isdir, |
82dce998 NTND |
996 | pattern, prefix, |
997 | pat->patternlen, pat->flags); | |
d0bfd026 | 998 | } |
dc09e9ec | 999 | return match_pathname(pathname, pathlen - isdir, |
82dce998 NTND |
1000 | base, baselen, |
1001 | pattern, prefix, pat->patternlen, pat->flags); | |
d0bfd026 JH |
1002 | } |
1003 | ||
685b2925 | 1004 | static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem); |
ec775c41 | 1005 | |
685b2925 | 1006 | static int fill_one(const char *what, struct all_attrs_item *all_attrs, |
60a12722 | 1007 | const struct match_attr *a, int rem) |
515106fa | 1008 | { |
34ace8ba | 1009 | size_t i; |
515106fa | 1010 | |
34ace8ba PS |
1011 | for (i = a->num_attr; rem > 0 && i > 0; i--) { |
1012 | const struct git_attr *attr = a->state[i - 1].attr; | |
685b2925 | 1013 | const char **n = &(all_attrs[attr->attr_nr].value); |
34ace8ba | 1014 | const char *v = a->state[i - 1].setto; |
515106fa JH |
1015 | |
1016 | if (*n == ATTR__UNKNOWN) { | |
426c27b7 | 1017 | debug_set(what, |
712efb1a | 1018 | a->is_macro ? a->u.attr->name : a->u.pat.pattern, |
426c27b7 | 1019 | attr, v); |
515106fa JH |
1020 | *n = v; |
1021 | rem--; | |
685b2925 | 1022 | rem = macroexpand_one(all_attrs, attr->attr_nr, rem); |
515106fa JH |
1023 | } |
1024 | } | |
1025 | return rem; | |
1026 | } | |
1027 | ||
bd2f371d | 1028 | static int fill(const char *path, int pathlen, int basename_offset, |
dc81cf37 BW |
1029 | const struct attr_stack *stack, |
1030 | struct all_attrs_item *all_attrs, int rem) | |
d0bfd026 | 1031 | { |
dc81cf37 | 1032 | for (; rem > 0 && stack; stack = stack->prev) { |
447ac906 | 1033 | unsigned i; |
dc81cf37 BW |
1034 | const char *base = stack->origin ? stack->origin : ""; |
1035 | ||
447ac906 PS |
1036 | for (i = stack->num_matches; 0 < rem && 0 < i; i--) { |
1037 | const struct match_attr *a = stack->attrs[i - 1]; | |
dc81cf37 BW |
1038 | if (a->is_macro) |
1039 | continue; | |
1040 | if (path_matches(path, pathlen, basename_offset, | |
1041 | &a->u.pat, base, stack->originlen)) | |
1042 | rem = fill_one("fill", all_attrs, a, rem); | |
1043 | } | |
d0bfd026 | 1044 | } |
dc81cf37 | 1045 | |
d0bfd026 JH |
1046 | return rem; |
1047 | } | |
1048 | ||
685b2925 | 1049 | static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem) |
f48fd688 | 1050 | { |
60a12722 | 1051 | const struct all_attrs_item *item = &all_attrs[nr]; |
f48fd688 | 1052 | |
60a12722 BW |
1053 | if (item->macro && item->value == ATTR__TRUE) |
1054 | return fill_one("expand", all_attrs, item->macro, rem); | |
1055 | else | |
ec775c41 | 1056 | return rem; |
60a12722 | 1057 | } |
ec775c41 | 1058 | |
60a12722 BW |
1059 | /* |
1060 | * Marks the attributes which are macros based on the attribute stack. | |
1061 | * This prevents having to search through the attribute stack each time | |
1062 | * a macro needs to be expanded during the fill stage. | |
1063 | */ | |
1064 | static void determine_macros(struct all_attrs_item *all_attrs, | |
1065 | const struct attr_stack *stack) | |
1066 | { | |
1067 | for (; stack; stack = stack->prev) { | |
447ac906 PS |
1068 | unsigned i; |
1069 | for (i = stack->num_matches; i > 0; i--) { | |
1070 | const struct match_attr *ma = stack->attrs[i - 1]; | |
60a12722 | 1071 | if (ma->is_macro) { |
e1e12e97 | 1072 | unsigned int n = ma->u.attr->attr_nr; |
60a12722 BW |
1073 | if (!all_attrs[n].macro) { |
1074 | all_attrs[n].macro = ma; | |
1075 | } | |
1076 | } | |
ec775c41 | 1077 | } |
4b0c6961 | 1078 | } |
f48fd688 JH |
1079 | } |
1080 | ||
2d721744 | 1081 | /* |
685b2925 BW |
1082 | * Collect attributes for path into the array pointed to by check->all_attrs. |
1083 | * If check->check_nr is non-zero, only attributes in check[] are collected. | |
1084 | * Otherwise all attributes are collected. | |
2d721744 | 1085 | */ |
7a400a2c NTND |
1086 | static void collect_some_attrs(const struct index_state *istate, |
1087 | const char *path, | |
1088 | struct attr_check *check) | |
d0bfd026 | 1089 | { |
7b95849b | 1090 | int pathlen, rem, dirlen; |
bd2f371d JH |
1091 | const char *cp, *last_slash = NULL; |
1092 | int basename_offset; | |
9db9eecf NTND |
1093 | |
1094 | for (cp = path; *cp; cp++) { | |
1095 | if (*cp == '/' && cp[1]) | |
1096 | last_slash = cp; | |
1097 | } | |
1098 | pathlen = cp - path; | |
1099 | if (last_slash) { | |
bd2f371d | 1100 | basename_offset = last_slash + 1 - path; |
9db9eecf NTND |
1101 | dirlen = last_slash - path; |
1102 | } else { | |
bd2f371d | 1103 | basename_offset = 0; |
9db9eecf NTND |
1104 | dirlen = 0; |
1105 | } | |
d0bfd026 | 1106 | |
7a400a2c | 1107 | prepare_attr_stack(istate, path, dirlen, &check->stack); |
685b2925 | 1108 | all_attrs_init(&g_attr_hashmap, check); |
dc81cf37 | 1109 | determine_macros(check->all_attrs, check->stack); |
685b2925 | 1110 | |
685b2925 | 1111 | rem = check->all_attrs_nr; |
dc81cf37 | 1112 | fill(path, pathlen, basename_offset, check->stack, check->all_attrs, rem); |
2d721744 MH |
1113 | } |
1114 | ||
d64324cb TB |
1115 | void git_check_attr(const struct index_state *istate, |
1116 | const char *path, | |
1117 | struct attr_check *check) | |
2d721744 MH |
1118 | { |
1119 | int i; | |
1120 | ||
7a400a2c | 1121 | collect_some_attrs(istate, path, check); |
f48fd688 | 1122 | |
6bc2e3f7 | 1123 | for (i = 0; i < check->nr; i++) { |
e1e12e97 | 1124 | unsigned int n = check->items[i].attr->attr_nr; |
685b2925 | 1125 | const char *value = check->all_attrs[n].value; |
515106fa JH |
1126 | if (value == ATTR__UNKNOWN) |
1127 | value = ATTR__UNSET; | |
6bc2e3f7 | 1128 | check->items[i].value = value; |
515106fa | 1129 | } |
d0bfd026 | 1130 | } |
06f33c17 | 1131 | |
7a400a2c NTND |
1132 | void git_all_attrs(const struct index_state *istate, |
1133 | const char *path, struct attr_check *check) | |
ee548df3 | 1134 | { |
7f864111 | 1135 | int i; |
ee548df3 | 1136 | |
7f864111 | 1137 | attr_check_reset(check); |
7a400a2c | 1138 | collect_some_attrs(istate, path, check); |
ee548df3 | 1139 | |
685b2925 BW |
1140 | for (i = 0; i < check->all_attrs_nr; i++) { |
1141 | const char *name = check->all_attrs[i].attr->name; | |
1142 | const char *value = check->all_attrs[i].value; | |
7f864111 JH |
1143 | struct attr_check_item *item; |
1144 | if (value == ATTR__UNSET || value == ATTR__UNKNOWN) | |
1145 | continue; | |
1146 | item = attr_check_append(check, git_attr(name)); | |
1147 | item->value = value; | |
ee548df3 | 1148 | } |
ee548df3 MH |
1149 | } |
1150 | ||
1a600b75 BW |
1151 | void attr_start(void) |
1152 | { | |
1a600b75 | 1153 | pthread_mutex_init(&g_attr_hashmap.mutex, NULL); |
dc81cf37 | 1154 | pthread_mutex_init(&check_vector.mutex, NULL); |
1a600b75 | 1155 | } |