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Commit | Line | Data |
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06f33c17 | 1 | #define NO_THE_INDEX_COMPATIBILITY_MACROS |
d0bfd026 | 2 | #include "cache.h" |
6df42ab9 | 3 | #include "exec_cmd.h" |
d0bfd026 JH |
4 | #include "attr.h" |
5 | ||
a5e92abd JH |
6 | const char git_attr__true[] = "(builtin)true"; |
7 | const char git_attr__false[] = "\0(builtin)false"; | |
8 | static const char git_attr__unknown[] = "(builtin)unknown"; | |
9 | #define ATTR__TRUE git_attr__true | |
10 | #define ATTR__FALSE git_attr__false | |
11 | #define ATTR__UNSET NULL | |
12 | #define ATTR__UNKNOWN git_attr__unknown | |
515106fa | 13 | |
6df42ab9 PO |
14 | static const char *attributes_file; |
15 | ||
d0bfd026 JH |
16 | /* |
17 | * The basic design decision here is that we are not going to have | |
18 | * insanely large number of attributes. | |
19 | * | |
20 | * This is a randomly chosen prime. | |
21 | */ | |
22 | #define HASHSIZE 257 | |
23 | ||
24 | #ifndef DEBUG_ATTR | |
25 | #define DEBUG_ATTR 0 | |
26 | #endif | |
27 | ||
28 | struct git_attr { | |
29 | struct git_attr *next; | |
30 | unsigned h; | |
f48fd688 | 31 | int attr_nr; |
d0bfd026 JH |
32 | char name[FLEX_ARRAY]; |
33 | }; | |
f48fd688 | 34 | static int attr_nr; |
d0bfd026 | 35 | |
f48fd688 | 36 | static struct git_attr_check *check_all_attr; |
d0bfd026 JH |
37 | static struct git_attr *(git_attr_hash[HASHSIZE]); |
38 | ||
352404ac MH |
39 | char *git_attr_name(struct git_attr *attr) |
40 | { | |
41 | return attr->name; | |
42 | } | |
43 | ||
d0bfd026 JH |
44 | static unsigned hash_name(const char *name, int namelen) |
45 | { | |
48fb7deb | 46 | unsigned val = 0, c; |
d0bfd026 JH |
47 | |
48 | while (namelen--) { | |
49 | c = *name++; | |
50 | val = ((val << 7) | (val >> 22)) ^ c; | |
51 | } | |
52 | return val; | |
53 | } | |
54 | ||
e4aee10a JH |
55 | static int invalid_attr_name(const char *name, int namelen) |
56 | { | |
57 | /* | |
d42453ab MH |
58 | * Attribute name cannot begin with '-' and must consist of |
59 | * characters from [-A-Za-z0-9_.]. | |
e4aee10a | 60 | */ |
c0b13b21 | 61 | if (namelen <= 0 || *name == '-') |
e4aee10a JH |
62 | return -1; |
63 | while (namelen--) { | |
64 | char ch = *name++; | |
65 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
66 | ('0' <= ch && ch <= '9') || | |
67 | ('a' <= ch && ch <= 'z') || | |
68 | ('A' <= ch && ch <= 'Z')) ) | |
69 | return -1; | |
70 | } | |
71 | return 0; | |
72 | } | |
73 | ||
7fb0eaa2 | 74 | static struct git_attr *git_attr_internal(const char *name, int len) |
d0bfd026 JH |
75 | { |
76 | unsigned hval = hash_name(name, len); | |
77 | unsigned pos = hval % HASHSIZE; | |
78 | struct git_attr *a; | |
79 | ||
80 | for (a = git_attr_hash[pos]; a; a = a->next) { | |
81 | if (a->h == hval && | |
82 | !memcmp(a->name, name, len) && !a->name[len]) | |
83 | return a; | |
84 | } | |
85 | ||
e4aee10a JH |
86 | if (invalid_attr_name(name, len)) |
87 | return NULL; | |
88 | ||
d0bfd026 JH |
89 | a = xmalloc(sizeof(*a) + len + 1); |
90 | memcpy(a->name, name, len); | |
91 | a->name[len] = 0; | |
92 | a->h = hval; | |
93 | a->next = git_attr_hash[pos]; | |
f48fd688 | 94 | a->attr_nr = attr_nr++; |
d0bfd026 | 95 | git_attr_hash[pos] = a; |
f48fd688 JH |
96 | |
97 | check_all_attr = xrealloc(check_all_attr, | |
98 | sizeof(*check_all_attr) * attr_nr); | |
99 | check_all_attr[a->attr_nr].attr = a; | |
515106fa | 100 | check_all_attr[a->attr_nr].value = ATTR__UNKNOWN; |
d0bfd026 JH |
101 | return a; |
102 | } | |
103 | ||
7fb0eaa2 JH |
104 | struct git_attr *git_attr(const char *name) |
105 | { | |
106 | return git_attr_internal(name, strlen(name)); | |
107 | } | |
108 | ||
d0bfd026 JH |
109 | /* |
110 | * .gitattributes file is one line per record, each of which is | |
111 | * | |
112 | * (1) glob pattern. | |
113 | * (2) whitespace | |
114 | * (3) whitespace separated list of attribute names, each of which | |
515106fa JH |
115 | * could be prefixed with '-' to mean "set to false", '!' to mean |
116 | * "unset". | |
d0bfd026 JH |
117 | */ |
118 | ||
515106fa | 119 | /* What does a matched pattern decide? */ |
d0bfd026 | 120 | struct attr_state { |
d0bfd026 | 121 | struct git_attr *attr; |
a5e92abd | 122 | const char *setto; |
d0bfd026 JH |
123 | }; |
124 | ||
125 | struct match_attr { | |
f48fd688 JH |
126 | union { |
127 | char *pattern; | |
128 | struct git_attr *attr; | |
129 | } u; | |
130 | char is_macro; | |
d0bfd026 JH |
131 | unsigned num_attr; |
132 | struct attr_state state[FLEX_ARRAY]; | |
133 | }; | |
134 | ||
135 | static const char blank[] = " \t\r\n"; | |
136 | ||
515106fa JH |
137 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
138 | int *num_attr, struct match_attr *res) | |
139 | { | |
140 | const char *ep, *equals; | |
141 | int len; | |
142 | ||
143 | ep = cp + strcspn(cp, blank); | |
144 | equals = strchr(cp, '='); | |
145 | if (equals && ep < equals) | |
146 | equals = NULL; | |
147 | if (equals) | |
148 | len = equals - cp; | |
149 | else | |
150 | len = ep - cp; | |
151 | if (!res) { | |
152 | if (*cp == '-' || *cp == '!') { | |
153 | cp++; | |
154 | len--; | |
155 | } | |
156 | if (invalid_attr_name(cp, len)) { | |
157 | fprintf(stderr, | |
158 | "%.*s is not a valid attribute name: %s:%d\n", | |
159 | len, cp, src, lineno); | |
160 | return NULL; | |
161 | } | |
162 | } else { | |
163 | struct attr_state *e; | |
164 | ||
165 | e = &(res->state[*num_attr]); | |
166 | if (*cp == '-' || *cp == '!') { | |
167 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
168 | cp++; | |
169 | len--; | |
170 | } | |
171 | else if (!equals) | |
172 | e->setto = ATTR__TRUE; | |
173 | else { | |
182af834 | 174 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 175 | } |
7fb0eaa2 | 176 | e->attr = git_attr_internal(cp, len); |
515106fa JH |
177 | } |
178 | (*num_attr)++; | |
179 | return ep + strspn(ep, blank); | |
180 | } | |
181 | ||
f48fd688 JH |
182 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
183 | int lineno, int macro_ok) | |
d0bfd026 JH |
184 | { |
185 | int namelen; | |
186 | int num_attr; | |
187 | const char *cp, *name; | |
515106fa | 188 | struct match_attr *res = NULL; |
d0bfd026 | 189 | int pass; |
f48fd688 | 190 | int is_macro; |
d0bfd026 JH |
191 | |
192 | cp = line + strspn(line, blank); | |
193 | if (!*cp || *cp == '#') | |
194 | return NULL; | |
195 | name = cp; | |
196 | namelen = strcspn(name, blank); | |
f48fd688 JH |
197 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && |
198 | !prefixcmp(name, ATTRIBUTE_MACRO_PREFIX)) { | |
199 | if (!macro_ok) { | |
200 | fprintf(stderr, "%s not allowed: %s:%d\n", | |
201 | name, src, lineno); | |
202 | return NULL; | |
203 | } | |
204 | is_macro = 1; | |
205 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
206 | name += strspn(name, blank); | |
207 | namelen = strcspn(name, blank); | |
e4aee10a JH |
208 | if (invalid_attr_name(name, namelen)) { |
209 | fprintf(stderr, | |
210 | "%.*s is not a valid attribute name: %s:%d\n", | |
211 | namelen, name, src, lineno); | |
212 | return NULL; | |
213 | } | |
f48fd688 JH |
214 | } |
215 | else | |
216 | is_macro = 0; | |
d0bfd026 JH |
217 | |
218 | for (pass = 0; pass < 2; pass++) { | |
219 | /* pass 0 counts and allocates, pass 1 fills */ | |
220 | num_attr = 0; | |
221 | cp = name + namelen; | |
222 | cp = cp + strspn(cp, blank); | |
d7b0a093 | 223 | while (*cp) { |
515106fa | 224 | cp = parse_attr(src, lineno, cp, &num_attr, res); |
d7b0a093 SP |
225 | if (!cp) |
226 | return NULL; | |
227 | } | |
d0bfd026 JH |
228 | if (pass) |
229 | break; | |
230 | res = xcalloc(1, | |
231 | sizeof(*res) + | |
232 | sizeof(struct attr_state) * num_attr + | |
f48fd688 | 233 | (is_macro ? 0 : namelen + 1)); |
515106fa | 234 | if (is_macro) |
7fb0eaa2 | 235 | res->u.attr = git_attr_internal(name, namelen); |
f48fd688 | 236 | else { |
4b25d091 | 237 | res->u.pattern = (char *)&(res->state[num_attr]); |
f48fd688 JH |
238 | memcpy(res->u.pattern, name, namelen); |
239 | res->u.pattern[namelen] = 0; | |
240 | } | |
241 | res->is_macro = is_macro; | |
d0bfd026 JH |
242 | res->num_attr = num_attr; |
243 | } | |
244 | return res; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Like info/exclude and .gitignore, the attribute information can | |
249 | * come from many places. | |
250 | * | |
251 | * (1) .gitattribute file of the same directory; | |
515106fa JH |
252 | * (2) .gitattribute file of the parent directory if (1) does not have |
253 | * any match; this goes recursively upwards, just like .gitignore. | |
254 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
255 | * |
256 | * In the same file, later entries override the earlier match, so in the | |
257 | * global list, we would have entries from info/attributes the earliest | |
258 | * (reading the file from top to bottom), .gitattribute of the root | |
259 | * directory (again, reading the file from top to bottom) down to the | |
260 | * current directory, and then scan the list backwards to find the first match. | |
261 | * This is exactly the same as what excluded() does in dir.c to deal with | |
262 | * .gitignore | |
263 | */ | |
264 | ||
265 | static struct attr_stack { | |
266 | struct attr_stack *prev; | |
267 | char *origin; | |
268 | unsigned num_matches; | |
a4413118 | 269 | unsigned alloc; |
d0bfd026 JH |
270 | struct match_attr **attrs; |
271 | } *attr_stack; | |
272 | ||
273 | static void free_attr_elem(struct attr_stack *e) | |
274 | { | |
275 | int i; | |
276 | free(e->origin); | |
515106fa JH |
277 | for (i = 0; i < e->num_matches; i++) { |
278 | struct match_attr *a = e->attrs[i]; | |
279 | int j; | |
280 | for (j = 0; j < a->num_attr; j++) { | |
a5e92abd | 281 | const char *setto = a->state[j].setto; |
515106fa JH |
282 | if (setto == ATTR__TRUE || |
283 | setto == ATTR__FALSE || | |
284 | setto == ATTR__UNSET || | |
285 | setto == ATTR__UNKNOWN) | |
286 | ; | |
287 | else | |
4b25d091 | 288 | free((char *) setto); |
515106fa JH |
289 | } |
290 | free(a); | |
291 | } | |
d0bfd026 JH |
292 | free(e); |
293 | } | |
294 | ||
295 | static const char *builtin_attr[] = { | |
5ec3e670 | 296 | "[attr]binary -diff -text", |
d0bfd026 JH |
297 | NULL, |
298 | }; | |
299 | ||
a4413118 JH |
300 | static void handle_attr_line(struct attr_stack *res, |
301 | const char *line, | |
302 | const char *src, | |
303 | int lineno, | |
304 | int macro_ok) | |
305 | { | |
306 | struct match_attr *a; | |
307 | ||
308 | a = parse_attr_line(line, src, lineno, macro_ok); | |
309 | if (!a) | |
310 | return; | |
311 | if (res->alloc <= res->num_matches) { | |
312 | res->alloc = alloc_nr(res->num_matches); | |
313 | res->attrs = xrealloc(res->attrs, | |
314 | sizeof(struct match_attr *) * | |
315 | res->alloc); | |
316 | } | |
317 | res->attrs[res->num_matches++] = a; | |
318 | } | |
319 | ||
d0bfd026 JH |
320 | static struct attr_stack *read_attr_from_array(const char **list) |
321 | { | |
322 | struct attr_stack *res; | |
323 | const char *line; | |
f48fd688 | 324 | int lineno = 0; |
d0bfd026 JH |
325 | |
326 | res = xcalloc(1, sizeof(*res)); | |
a4413118 JH |
327 | while ((line = *(list++)) != NULL) |
328 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
d0bfd026 JH |
329 | return res; |
330 | } | |
331 | ||
06f33c17 JH |
332 | static enum git_attr_direction direction; |
333 | static struct index_state *use_index; | |
334 | ||
f48fd688 | 335 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) |
d0bfd026 | 336 | { |
a4413118 | 337 | FILE *fp = fopen(path, "r"); |
d0bfd026 JH |
338 | struct attr_stack *res; |
339 | char buf[2048]; | |
f48fd688 | 340 | int lineno = 0; |
d0bfd026 | 341 | |
d0bfd026 | 342 | if (!fp) |
a4413118 JH |
343 | return NULL; |
344 | res = xcalloc(1, sizeof(*res)); | |
345 | while (fgets(buf, sizeof(buf), fp)) | |
346 | handle_attr_line(res, buf, path, ++lineno, macro_ok); | |
347 | fclose(fp); | |
348 | return res; | |
349 | } | |
d0bfd026 | 350 | |
1a9d7e9b JH |
351 | static void *read_index_data(const char *path) |
352 | { | |
353 | int pos, len; | |
354 | unsigned long sz; | |
355 | enum object_type type; | |
356 | void *data; | |
06f33c17 | 357 | struct index_state *istate = use_index ? use_index : &the_index; |
1a9d7e9b JH |
358 | |
359 | len = strlen(path); | |
06f33c17 | 360 | pos = index_name_pos(istate, path, len); |
1a9d7e9b JH |
361 | if (pos < 0) { |
362 | /* | |
363 | * We might be in the middle of a merge, in which | |
364 | * case we would read stage #2 (ours). | |
365 | */ | |
366 | int i; | |
367 | for (i = -pos - 1; | |
06f33c17 JH |
368 | (pos < 0 && i < istate->cache_nr && |
369 | !strcmp(istate->cache[i]->name, path)); | |
1a9d7e9b | 370 | i++) |
06f33c17 | 371 | if (ce_stage(istate->cache[i]) == 2) |
1a9d7e9b JH |
372 | pos = i; |
373 | } | |
374 | if (pos < 0) | |
375 | return NULL; | |
06f33c17 | 376 | data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz); |
1a9d7e9b JH |
377 | if (!data || type != OBJ_BLOB) { |
378 | free(data); | |
379 | return NULL; | |
380 | } | |
381 | return data; | |
382 | } | |
383 | ||
06f33c17 | 384 | static struct attr_stack *read_attr_from_index(const char *path, int macro_ok) |
a4413118 JH |
385 | { |
386 | struct attr_stack *res; | |
1a9d7e9b JH |
387 | char *buf, *sp; |
388 | int lineno = 0; | |
f48fd688 | 389 | |
1a9d7e9b JH |
390 | buf = read_index_data(path); |
391 | if (!buf) | |
06f33c17 | 392 | return NULL; |
1a9d7e9b | 393 | |
06f33c17 | 394 | res = xcalloc(1, sizeof(*res)); |
1a9d7e9b JH |
395 | for (sp = buf; *sp; ) { |
396 | char *ep; | |
397 | int more; | |
398 | for (ep = sp; *ep && *ep != '\n'; ep++) | |
399 | ; | |
400 | more = (*ep == '\n'); | |
401 | *ep = '\0'; | |
402 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
403 | sp = ep + more; | |
404 | } | |
405 | free(buf); | |
d0bfd026 JH |
406 | return res; |
407 | } | |
408 | ||
06f33c17 JH |
409 | static struct attr_stack *read_attr(const char *path, int macro_ok) |
410 | { | |
411 | struct attr_stack *res; | |
412 | ||
413 | if (direction == GIT_ATTR_CHECKOUT) { | |
414 | res = read_attr_from_index(path, macro_ok); | |
415 | if (!res) | |
416 | res = read_attr_from_file(path, macro_ok); | |
417 | } | |
4191e80a | 418 | else if (direction == GIT_ATTR_CHECKIN) { |
06f33c17 JH |
419 | res = read_attr_from_file(path, macro_ok); |
420 | if (!res) | |
421 | /* | |
422 | * There is no checked out .gitattributes file there, but | |
423 | * we might have it in the index. We allow operation in a | |
424 | * sparsely checked out work tree, so read from it. | |
425 | */ | |
426 | res = read_attr_from_index(path, macro_ok); | |
427 | } | |
4191e80a NTND |
428 | else |
429 | res = read_attr_from_index(path, macro_ok); | |
06f33c17 JH |
430 | if (!res) |
431 | res = xcalloc(1, sizeof(*res)); | |
432 | return res; | |
433 | } | |
434 | ||
d0bfd026 JH |
435 | #if DEBUG_ATTR |
436 | static void debug_info(const char *what, struct attr_stack *elem) | |
437 | { | |
438 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
439 | } | |
cf94ccda | 440 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) |
f48fd688 | 441 | { |
515106fa JH |
442 | const char *value = v; |
443 | ||
444 | if (ATTR_TRUE(value)) | |
445 | value = "set"; | |
446 | else if (ATTR_FALSE(value)) | |
447 | value = "unset"; | |
448 | else if (ATTR_UNSET(value)) | |
449 | value = "unspecified"; | |
450 | ||
451 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
452 | what, attr->name, (char *) value, match); | |
f48fd688 | 453 | } |
d0bfd026 JH |
454 | #define debug_push(a) debug_info("push", (a)) |
455 | #define debug_pop(a) debug_info("pop", (a)) | |
456 | #else | |
457 | #define debug_push(a) do { ; } while (0) | |
458 | #define debug_pop(a) do { ; } while (0) | |
f48fd688 | 459 | #define debug_set(a,b,c,d) do { ; } while (0) |
d0bfd026 JH |
460 | #endif |
461 | ||
06f33c17 JH |
462 | static void drop_attr_stack(void) |
463 | { | |
464 | while (attr_stack) { | |
465 | struct attr_stack *elem = attr_stack; | |
466 | attr_stack = elem->prev; | |
467 | free_attr_elem(elem); | |
468 | } | |
469 | } | |
470 | ||
c5147722 | 471 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
472 | { |
473 | static const char *system_wide; | |
474 | if (!system_wide) | |
475 | system_wide = system_path(ETC_GITATTRIBUTES); | |
476 | return system_wide; | |
477 | } | |
478 | ||
c5147722 | 479 | static int git_attr_system(void) |
6df42ab9 PO |
480 | { |
481 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
482 | } | |
483 | ||
6df42ab9 PO |
484 | static int git_attr_config(const char *var, const char *value, void *dummy) |
485 | { | |
486 | if (!strcmp(var, "core.attributesfile")) | |
487 | return git_config_pathname(&attributes_file, var, value); | |
488 | ||
489 | return 0; | |
490 | } | |
491 | ||
f48fd688 JH |
492 | static void bootstrap_attr_stack(void) |
493 | { | |
494 | if (!attr_stack) { | |
495 | struct attr_stack *elem; | |
496 | ||
497 | elem = read_attr_from_array(builtin_attr); | |
498 | elem->origin = NULL; | |
499 | elem->prev = attr_stack; | |
500 | attr_stack = elem; | |
501 | ||
6df42ab9 PO |
502 | if (git_attr_system()) { |
503 | elem = read_attr_from_file(git_etc_gitattributes(), 1); | |
504 | if (elem) { | |
505 | elem->origin = NULL; | |
506 | elem->prev = attr_stack; | |
507 | attr_stack = elem; | |
508 | } | |
509 | } | |
510 | ||
511 | git_config(git_attr_config, NULL); | |
e91b6c50 | 512 | if (attributes_file) { |
6df42ab9 PO |
513 | elem = read_attr_from_file(attributes_file, 1); |
514 | if (elem) { | |
515 | elem->origin = NULL; | |
516 | elem->prev = attr_stack; | |
517 | attr_stack = elem; | |
518 | } | |
519 | } | |
520 | ||
4191e80a | 521 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
2d35d556 RS |
522 | elem = read_attr(GITATTRIBUTES_FILE, 1); |
523 | elem->origin = strdup(""); | |
524 | elem->prev = attr_stack; | |
525 | attr_stack = elem; | |
526 | debug_push(elem); | |
527 | } | |
f48fd688 JH |
528 | |
529 | elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1); | |
a4413118 JH |
530 | if (!elem) |
531 | elem = xcalloc(1, sizeof(*elem)); | |
f48fd688 JH |
532 | elem->origin = NULL; |
533 | elem->prev = attr_stack; | |
534 | attr_stack = elem; | |
535 | } | |
536 | } | |
537 | ||
d0bfd026 JH |
538 | static void prepare_attr_stack(const char *path, int dirlen) |
539 | { | |
540 | struct attr_stack *elem, *info; | |
541 | int len; | |
f66cf96d DP |
542 | struct strbuf pathbuf; |
543 | ||
544 | strbuf_init(&pathbuf, dirlen+2+strlen(GITATTRIBUTES_FILE)); | |
d0bfd026 JH |
545 | |
546 | /* | |
547 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
548 | * set of attribute definitions, followed by the contents |
549 | * of $(prefix)/etc/gitattributes and a file specified by | |
550 | * core.attributesfile. Then, contents from | |
d0bfd026 JH |
551 | * .gitattribute files from directories closer to the |
552 | * root to the ones in deeper directories are pushed | |
553 | * to the stack. Finally, at the very top of the stack | |
554 | * we always keep the contents of $GIT_DIR/info/attributes. | |
555 | * | |
556 | * When checking, we use entries from near the top of the | |
557 | * stack, preferring $GIT_DIR/info/attributes, then | |
558 | * .gitattributes in deeper directories to shallower ones, | |
559 | * and finally use the built-in set as the default. | |
560 | */ | |
f48fd688 JH |
561 | if (!attr_stack) |
562 | bootstrap_attr_stack(); | |
d0bfd026 JH |
563 | |
564 | /* | |
565 | * Pop the "info" one that is always at the top of the stack. | |
566 | */ | |
567 | info = attr_stack; | |
568 | attr_stack = info->prev; | |
569 | ||
570 | /* | |
571 | * Pop the ones from directories that are not the prefix of | |
572 | * the path we are checking. | |
573 | */ | |
574 | while (attr_stack && attr_stack->origin) { | |
575 | int namelen = strlen(attr_stack->origin); | |
576 | ||
577 | elem = attr_stack; | |
578 | if (namelen <= dirlen && | |
579 | !strncmp(elem->origin, path, namelen)) | |
580 | break; | |
581 | ||
582 | debug_pop(elem); | |
583 | attr_stack = elem->prev; | |
584 | free_attr_elem(elem); | |
585 | } | |
586 | ||
587 | /* | |
588 | * Read from parent directories and push them down | |
589 | */ | |
4191e80a | 590 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
2d35d556 RS |
591 | while (1) { |
592 | char *cp; | |
593 | ||
594 | len = strlen(attr_stack->origin); | |
595 | if (dirlen <= len) | |
596 | break; | |
f66cf96d DP |
597 | strbuf_reset(&pathbuf); |
598 | strbuf_add(&pathbuf, path, dirlen); | |
599 | strbuf_addch(&pathbuf, '/'); | |
600 | cp = strchr(pathbuf.buf + len + 1, '/'); | |
2d35d556 | 601 | strcpy(cp + 1, GITATTRIBUTES_FILE); |
f66cf96d | 602 | elem = read_attr(pathbuf.buf, 0); |
2d35d556 | 603 | *cp = '\0'; |
f66cf96d | 604 | elem->origin = strdup(pathbuf.buf); |
2d35d556 RS |
605 | elem->prev = attr_stack; |
606 | attr_stack = elem; | |
607 | debug_push(elem); | |
608 | } | |
d0bfd026 JH |
609 | } |
610 | ||
d4c98565 RS |
611 | strbuf_release(&pathbuf); |
612 | ||
d0bfd026 JH |
613 | /* |
614 | * Finally push the "info" one at the top of the stack. | |
615 | */ | |
616 | info->prev = attr_stack; | |
617 | attr_stack = info; | |
618 | } | |
619 | ||
620 | static int path_matches(const char *pathname, int pathlen, | |
621 | const char *pattern, | |
622 | const char *base, int baselen) | |
623 | { | |
624 | if (!strchr(pattern, '/')) { | |
625 | /* match basename */ | |
626 | const char *basename = strrchr(pathname, '/'); | |
627 | basename = basename ? basename + 1 : pathname; | |
628 | return (fnmatch(pattern, basename, 0) == 0); | |
629 | } | |
630 | /* | |
631 | * match with FNM_PATHNAME; the pattern has base implicitly | |
632 | * in front of it. | |
633 | */ | |
634 | if (*pattern == '/') | |
635 | pattern++; | |
636 | if (pathlen < baselen || | |
cf94ccda | 637 | (baselen && pathname[baselen] != '/') || |
d0bfd026 JH |
638 | strncmp(pathname, base, baselen)) |
639 | return 0; | |
82881b38 MO |
640 | if (baselen != 0) |
641 | baselen++; | |
642 | return fnmatch(pattern, pathname + baselen, FNM_PATHNAME) == 0; | |
d0bfd026 JH |
643 | } |
644 | ||
ec775c41 HG |
645 | static int macroexpand_one(int attr_nr, int rem); |
646 | ||
515106fa JH |
647 | static int fill_one(const char *what, struct match_attr *a, int rem) |
648 | { | |
649 | struct git_attr_check *check = check_all_attr; | |
650 | int i; | |
651 | ||
969f9d73 | 652 | for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) { |
515106fa | 653 | struct git_attr *attr = a->state[i].attr; |
a5e92abd JH |
654 | const char **n = &(check[attr->attr_nr].value); |
655 | const char *v = a->state[i].setto; | |
515106fa JH |
656 | |
657 | if (*n == ATTR__UNKNOWN) { | |
426c27b7 HG |
658 | debug_set(what, |
659 | a->is_macro ? a->u.attr->name : a->u.pattern, | |
660 | attr, v); | |
515106fa JH |
661 | *n = v; |
662 | rem--; | |
ec775c41 | 663 | rem = macroexpand_one(attr->attr_nr, rem); |
515106fa JH |
664 | } |
665 | } | |
666 | return rem; | |
667 | } | |
668 | ||
f48fd688 | 669 | static int fill(const char *path, int pathlen, struct attr_stack *stk, int rem) |
d0bfd026 | 670 | { |
515106fa | 671 | int i; |
d0bfd026 JH |
672 | const char *base = stk->origin ? stk->origin : ""; |
673 | ||
674 | for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) { | |
675 | struct match_attr *a = stk->attrs[i]; | |
f48fd688 JH |
676 | if (a->is_macro) |
677 | continue; | |
d0bfd026 | 678 | if (path_matches(path, pathlen, |
515106fa JH |
679 | a->u.pattern, base, strlen(base))) |
680 | rem = fill_one("fill", a, rem); | |
d0bfd026 JH |
681 | } |
682 | return rem; | |
683 | } | |
684 | ||
ec775c41 | 685 | static int macroexpand_one(int attr_nr, int rem) |
f48fd688 | 686 | { |
ec775c41 HG |
687 | struct attr_stack *stk; |
688 | struct match_attr *a = NULL; | |
515106fa | 689 | int i; |
f48fd688 | 690 | |
ec775c41 HG |
691 | if (check_all_attr[attr_nr].value != ATTR__TRUE) |
692 | return rem; | |
693 | ||
694 | for (stk = attr_stack; !a && stk; stk = stk->prev) | |
695 | for (i = stk->num_matches - 1; !a && 0 <= i; i--) { | |
696 | struct match_attr *ma = stk->attrs[i]; | |
697 | if (!ma->is_macro) | |
698 | continue; | |
699 | if (ma->u.attr->attr_nr == attr_nr) | |
700 | a = ma; | |
701 | } | |
702 | ||
703 | if (a) | |
515106fa | 704 | rem = fill_one("expand", a, rem); |
ec775c41 | 705 | |
f48fd688 JH |
706 | return rem; |
707 | } | |
708 | ||
d0bfd026 JH |
709 | int git_checkattr(const char *path, int num, struct git_attr_check *check) |
710 | { | |
711 | struct attr_stack *stk; | |
712 | const char *cp; | |
713 | int dirlen, pathlen, i, rem; | |
714 | ||
f48fd688 JH |
715 | bootstrap_attr_stack(); |
716 | for (i = 0; i < attr_nr; i++) | |
515106fa | 717 | check_all_attr[i].value = ATTR__UNKNOWN; |
d0bfd026 JH |
718 | |
719 | pathlen = strlen(path); | |
720 | cp = strrchr(path, '/'); | |
721 | if (!cp) | |
722 | dirlen = 0; | |
723 | else | |
724 | dirlen = cp - path; | |
725 | prepare_attr_stack(path, dirlen); | |
f48fd688 JH |
726 | rem = attr_nr; |
727 | for (stk = attr_stack; 0 < rem && stk; stk = stk->prev) | |
728 | rem = fill(path, pathlen, stk, rem); | |
729 | ||
515106fa | 730 | for (i = 0; i < num; i++) { |
a5e92abd | 731 | const char *value = check_all_attr[check[i].attr->attr_nr].value; |
515106fa JH |
732 | if (value == ATTR__UNKNOWN) |
733 | value = ATTR__UNSET; | |
734 | check[i].value = value; | |
735 | } | |
f48fd688 | 736 | |
d0bfd026 JH |
737 | return 0; |
738 | } | |
06f33c17 JH |
739 | |
740 | void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate) | |
741 | { | |
742 | enum git_attr_direction old = direction; | |
4191e80a NTND |
743 | |
744 | if (is_bare_repository() && new != GIT_ATTR_INDEX) | |
745 | die("BUG: non-INDEX attr direction in a bare repo"); | |
746 | ||
06f33c17 JH |
747 | direction = new; |
748 | if (new != old) | |
749 | drop_attr_stack(); | |
750 | use_index = istate; | |
751 | } |