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