]>
Commit | Line | Data |
---|---|---|
86ab7f0c MH |
1 | /* |
2 | * Handle git attributes. See gitattributes(5) for a description of | |
3 | * the file syntax, and Documentation/technical/api-gitattributes.txt | |
4 | * for a description of the API. | |
5 | * | |
6 | * One basic design decision here is that we are not going to support | |
7 | * an insanely large number of attributes. | |
8 | */ | |
9 | ||
06f33c17 | 10 | #define NO_THE_INDEX_COMPATIBILITY_MACROS |
d0bfd026 | 11 | #include "cache.h" |
6df42ab9 | 12 | #include "exec_cmd.h" |
d0bfd026 JH |
13 | #include "attr.h" |
14 | ||
a5e92abd JH |
15 | const char git_attr__true[] = "(builtin)true"; |
16 | const char git_attr__false[] = "\0(builtin)false"; | |
17 | static const char git_attr__unknown[] = "(builtin)unknown"; | |
18 | #define ATTR__TRUE git_attr__true | |
19 | #define ATTR__FALSE git_attr__false | |
20 | #define ATTR__UNSET NULL | |
21 | #define ATTR__UNKNOWN git_attr__unknown | |
515106fa | 22 | |
6df42ab9 PO |
23 | static const char *attributes_file; |
24 | ||
86ab7f0c | 25 | /* This is a randomly chosen prime. */ |
d0bfd026 JH |
26 | #define HASHSIZE 257 |
27 | ||
28 | #ifndef DEBUG_ATTR | |
29 | #define DEBUG_ATTR 0 | |
30 | #endif | |
31 | ||
32 | struct git_attr { | |
33 | struct git_attr *next; | |
34 | unsigned h; | |
f48fd688 | 35 | int attr_nr; |
d0bfd026 JH |
36 | char name[FLEX_ARRAY]; |
37 | }; | |
f48fd688 | 38 | static int attr_nr; |
d0bfd026 | 39 | |
f48fd688 | 40 | static struct git_attr_check *check_all_attr; |
d0bfd026 JH |
41 | static struct git_attr *(git_attr_hash[HASHSIZE]); |
42 | ||
352404ac MH |
43 | char *git_attr_name(struct git_attr *attr) |
44 | { | |
45 | return attr->name; | |
46 | } | |
47 | ||
d0bfd026 JH |
48 | static unsigned hash_name(const char *name, int namelen) |
49 | { | |
48fb7deb | 50 | unsigned val = 0, c; |
d0bfd026 JH |
51 | |
52 | while (namelen--) { | |
53 | c = *name++; | |
54 | val = ((val << 7) | (val >> 22)) ^ c; | |
55 | } | |
56 | return val; | |
57 | } | |
58 | ||
e4aee10a JH |
59 | static int invalid_attr_name(const char *name, int namelen) |
60 | { | |
61 | /* | |
d42453ab MH |
62 | * Attribute name cannot begin with '-' and must consist of |
63 | * characters from [-A-Za-z0-9_.]. | |
e4aee10a | 64 | */ |
c0b13b21 | 65 | if (namelen <= 0 || *name == '-') |
e4aee10a JH |
66 | return -1; |
67 | while (namelen--) { | |
68 | char ch = *name++; | |
69 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
70 | ('0' <= ch && ch <= '9') || | |
71 | ('a' <= ch && ch <= 'z') || | |
72 | ('A' <= ch && ch <= 'Z')) ) | |
73 | return -1; | |
74 | } | |
75 | return 0; | |
76 | } | |
77 | ||
7fb0eaa2 | 78 | static struct git_attr *git_attr_internal(const char *name, int len) |
d0bfd026 JH |
79 | { |
80 | unsigned hval = hash_name(name, len); | |
81 | unsigned pos = hval % HASHSIZE; | |
82 | struct git_attr *a; | |
83 | ||
84 | for (a = git_attr_hash[pos]; a; a = a->next) { | |
85 | if (a->h == hval && | |
86 | !memcmp(a->name, name, len) && !a->name[len]) | |
87 | return a; | |
88 | } | |
89 | ||
e4aee10a JH |
90 | if (invalid_attr_name(name, len)) |
91 | return NULL; | |
92 | ||
d0bfd026 JH |
93 | a = xmalloc(sizeof(*a) + len + 1); |
94 | memcpy(a->name, name, len); | |
95 | a->name[len] = 0; | |
96 | a->h = hval; | |
97 | a->next = git_attr_hash[pos]; | |
f48fd688 | 98 | a->attr_nr = attr_nr++; |
d0bfd026 | 99 | git_attr_hash[pos] = a; |
f48fd688 JH |
100 | |
101 | check_all_attr = xrealloc(check_all_attr, | |
102 | sizeof(*check_all_attr) * attr_nr); | |
103 | check_all_attr[a->attr_nr].attr = a; | |
515106fa | 104 | check_all_attr[a->attr_nr].value = ATTR__UNKNOWN; |
d0bfd026 JH |
105 | return a; |
106 | } | |
107 | ||
7fb0eaa2 JH |
108 | struct git_attr *git_attr(const char *name) |
109 | { | |
110 | return git_attr_internal(name, strlen(name)); | |
111 | } | |
112 | ||
515106fa | 113 | /* What does a matched pattern decide? */ |
d0bfd026 | 114 | struct attr_state { |
d0bfd026 | 115 | struct git_attr *attr; |
a5e92abd | 116 | const char *setto; |
d0bfd026 JH |
117 | }; |
118 | ||
ba845b75 MH |
119 | /* |
120 | * One rule, as from a .gitattributes file. | |
121 | * | |
122 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
123 | * defined. | |
124 | * | |
125 | * If is_macro is false, then u.pattern points at the filename pattern | |
126 | * to which the rule applies. (The memory pointed to is part of the | |
127 | * memory block allocated for the match_attr instance.) | |
128 | * | |
129 | * In either case, num_attr is the number of attributes affected by | |
130 | * this rule, and state is an array listing them. The attributes are | |
131 | * listed as they appear in the file (macros unexpanded). | |
132 | */ | |
d0bfd026 | 133 | struct match_attr { |
f48fd688 JH |
134 | union { |
135 | char *pattern; | |
136 | struct git_attr *attr; | |
137 | } u; | |
138 | char is_macro; | |
d0bfd026 JH |
139 | unsigned num_attr; |
140 | struct attr_state state[FLEX_ARRAY]; | |
141 | }; | |
142 | ||
143 | static const char blank[] = " \t\r\n"; | |
144 | ||
d1751298 MH |
145 | /* |
146 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
147 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
148 | * If e is not NULL, write the results to *e. Return a pointer to the | |
149 | * remainder of the string (with leading whitespace removed), or NULL | |
150 | * if there was an error. | |
151 | */ | |
515106fa | 152 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
d1751298 | 153 | struct attr_state *e) |
515106fa JH |
154 | { |
155 | const char *ep, *equals; | |
156 | int len; | |
157 | ||
158 | ep = cp + strcspn(cp, blank); | |
159 | equals = strchr(cp, '='); | |
160 | if (equals && ep < equals) | |
161 | equals = NULL; | |
162 | if (equals) | |
163 | len = equals - cp; | |
164 | else | |
165 | len = ep - cp; | |
d1751298 | 166 | if (!e) { |
515106fa JH |
167 | if (*cp == '-' || *cp == '!') { |
168 | cp++; | |
169 | len--; | |
170 | } | |
171 | if (invalid_attr_name(cp, len)) { | |
172 | fprintf(stderr, | |
173 | "%.*s is not a valid attribute name: %s:%d\n", | |
174 | len, cp, src, lineno); | |
175 | return NULL; | |
176 | } | |
177 | } else { | |
515106fa JH |
178 | if (*cp == '-' || *cp == '!') { |
179 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
180 | cp++; | |
181 | len--; | |
182 | } | |
183 | else if (!equals) | |
184 | e->setto = ATTR__TRUE; | |
185 | else { | |
182af834 | 186 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 187 | } |
7fb0eaa2 | 188 | e->attr = git_attr_internal(cp, len); |
515106fa | 189 | } |
515106fa JH |
190 | return ep + strspn(ep, blank); |
191 | } | |
192 | ||
f48fd688 JH |
193 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
194 | int lineno, int macro_ok) | |
d0bfd026 JH |
195 | { |
196 | int namelen; | |
d68e1c18 | 197 | int num_attr, i; |
85c4a0d0 | 198 | const char *cp, *name, *states; |
515106fa | 199 | struct match_attr *res = NULL; |
f48fd688 | 200 | int is_macro; |
d0bfd026 JH |
201 | |
202 | cp = line + strspn(line, blank); | |
203 | if (!*cp || *cp == '#') | |
204 | return NULL; | |
205 | name = cp; | |
206 | namelen = strcspn(name, blank); | |
f48fd688 JH |
207 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && |
208 | !prefixcmp(name, ATTRIBUTE_MACRO_PREFIX)) { | |
209 | if (!macro_ok) { | |
210 | fprintf(stderr, "%s not allowed: %s:%d\n", | |
211 | name, src, lineno); | |
212 | return NULL; | |
213 | } | |
214 | is_macro = 1; | |
215 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
216 | name += strspn(name, blank); | |
217 | namelen = strcspn(name, blank); | |
e4aee10a JH |
218 | if (invalid_attr_name(name, namelen)) { |
219 | fprintf(stderr, | |
220 | "%.*s is not a valid attribute name: %s:%d\n", | |
221 | namelen, name, src, lineno); | |
222 | return NULL; | |
223 | } | |
f48fd688 JH |
224 | } |
225 | else | |
226 | is_macro = 0; | |
d0bfd026 | 227 | |
85c4a0d0 MH |
228 | states = name + namelen; |
229 | states += strspn(states, blank); | |
230 | ||
d68e1c18 MH |
231 | /* First pass to count the attr_states */ |
232 | for (cp = states, num_attr = 0; *cp; num_attr++) { | |
233 | cp = parse_attr(src, lineno, cp, NULL); | |
234 | if (!cp) | |
235 | return NULL; | |
d0bfd026 | 236 | } |
d68e1c18 MH |
237 | |
238 | res = xcalloc(1, | |
239 | sizeof(*res) + | |
240 | sizeof(struct attr_state) * num_attr + | |
241 | (is_macro ? 0 : namelen + 1)); | |
242 | if (is_macro) | |
243 | res->u.attr = git_attr_internal(name, namelen); | |
244 | else { | |
245 | res->u.pattern = (char *)&(res->state[num_attr]); | |
246 | memcpy(res->u.pattern, name, namelen); | |
247 | res->u.pattern[namelen] = 0; | |
d0bfd026 | 248 | } |
d68e1c18 MH |
249 | res->is_macro = is_macro; |
250 | res->num_attr = num_attr; | |
251 | ||
252 | /* Second pass to fill the attr_states */ | |
253 | for (cp = states, i = 0; *cp; i++) { | |
254 | cp = parse_attr(src, lineno, cp, &(res->state[i])); | |
255 | } | |
256 | ||
d0bfd026 JH |
257 | return res; |
258 | } | |
259 | ||
260 | /* | |
261 | * Like info/exclude and .gitignore, the attribute information can | |
262 | * come from many places. | |
263 | * | |
264 | * (1) .gitattribute file of the same directory; | |
515106fa JH |
265 | * (2) .gitattribute file of the parent directory if (1) does not have |
266 | * any match; this goes recursively upwards, just like .gitignore. | |
267 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
268 | * |
269 | * In the same file, later entries override the earlier match, so in the | |
270 | * global list, we would have entries from info/attributes the earliest | |
271 | * (reading the file from top to bottom), .gitattribute of the root | |
272 | * directory (again, reading the file from top to bottom) down to the | |
273 | * current directory, and then scan the list backwards to find the first match. | |
274 | * This is exactly the same as what excluded() does in dir.c to deal with | |
275 | * .gitignore | |
276 | */ | |
277 | ||
278 | static struct attr_stack { | |
279 | struct attr_stack *prev; | |
280 | char *origin; | |
281 | unsigned num_matches; | |
a4413118 | 282 | unsigned alloc; |
d0bfd026 JH |
283 | struct match_attr **attrs; |
284 | } *attr_stack; | |
285 | ||
286 | static void free_attr_elem(struct attr_stack *e) | |
287 | { | |
288 | int i; | |
289 | free(e->origin); | |
515106fa JH |
290 | for (i = 0; i < e->num_matches; i++) { |
291 | struct match_attr *a = e->attrs[i]; | |
292 | int j; | |
293 | for (j = 0; j < a->num_attr; j++) { | |
a5e92abd | 294 | const char *setto = a->state[j].setto; |
515106fa JH |
295 | if (setto == ATTR__TRUE || |
296 | setto == ATTR__FALSE || | |
297 | setto == ATTR__UNSET || | |
298 | setto == ATTR__UNKNOWN) | |
299 | ; | |
300 | else | |
4b25d091 | 301 | free((char *) setto); |
515106fa JH |
302 | } |
303 | free(a); | |
304 | } | |
d0bfd026 JH |
305 | free(e); |
306 | } | |
307 | ||
308 | static const char *builtin_attr[] = { | |
5ec3e670 | 309 | "[attr]binary -diff -text", |
d0bfd026 JH |
310 | NULL, |
311 | }; | |
312 | ||
a4413118 JH |
313 | static void handle_attr_line(struct attr_stack *res, |
314 | const char *line, | |
315 | const char *src, | |
316 | int lineno, | |
317 | int macro_ok) | |
318 | { | |
319 | struct match_attr *a; | |
320 | ||
321 | a = parse_attr_line(line, src, lineno, macro_ok); | |
322 | if (!a) | |
323 | return; | |
324 | if (res->alloc <= res->num_matches) { | |
325 | res->alloc = alloc_nr(res->num_matches); | |
326 | res->attrs = xrealloc(res->attrs, | |
327 | sizeof(struct match_attr *) * | |
328 | res->alloc); | |
329 | } | |
330 | res->attrs[res->num_matches++] = a; | |
331 | } | |
332 | ||
d0bfd026 JH |
333 | static struct attr_stack *read_attr_from_array(const char **list) |
334 | { | |
335 | struct attr_stack *res; | |
336 | const char *line; | |
f48fd688 | 337 | int lineno = 0; |
d0bfd026 JH |
338 | |
339 | res = xcalloc(1, sizeof(*res)); | |
a4413118 JH |
340 | while ((line = *(list++)) != NULL) |
341 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
d0bfd026 JH |
342 | return res; |
343 | } | |
344 | ||
06f33c17 JH |
345 | static enum git_attr_direction direction; |
346 | static struct index_state *use_index; | |
347 | ||
f48fd688 | 348 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) |
d0bfd026 | 349 | { |
a4413118 | 350 | FILE *fp = fopen(path, "r"); |
d0bfd026 JH |
351 | struct attr_stack *res; |
352 | char buf[2048]; | |
f48fd688 | 353 | int lineno = 0; |
d0bfd026 | 354 | |
d0bfd026 | 355 | if (!fp) |
a4413118 JH |
356 | return NULL; |
357 | res = xcalloc(1, sizeof(*res)); | |
358 | while (fgets(buf, sizeof(buf), fp)) | |
359 | handle_attr_line(res, buf, path, ++lineno, macro_ok); | |
360 | fclose(fp); | |
361 | return res; | |
362 | } | |
d0bfd026 | 363 | |
1a9d7e9b JH |
364 | static void *read_index_data(const char *path) |
365 | { | |
366 | int pos, len; | |
367 | unsigned long sz; | |
368 | enum object_type type; | |
369 | void *data; | |
06f33c17 | 370 | struct index_state *istate = use_index ? use_index : &the_index; |
1a9d7e9b JH |
371 | |
372 | len = strlen(path); | |
06f33c17 | 373 | pos = index_name_pos(istate, path, len); |
1a9d7e9b JH |
374 | if (pos < 0) { |
375 | /* | |
376 | * We might be in the middle of a merge, in which | |
377 | * case we would read stage #2 (ours). | |
378 | */ | |
379 | int i; | |
380 | for (i = -pos - 1; | |
06f33c17 JH |
381 | (pos < 0 && i < istate->cache_nr && |
382 | !strcmp(istate->cache[i]->name, path)); | |
1a9d7e9b | 383 | i++) |
06f33c17 | 384 | if (ce_stage(istate->cache[i]) == 2) |
1a9d7e9b JH |
385 | pos = i; |
386 | } | |
387 | if (pos < 0) | |
388 | return NULL; | |
06f33c17 | 389 | data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz); |
1a9d7e9b JH |
390 | if (!data || type != OBJ_BLOB) { |
391 | free(data); | |
392 | return NULL; | |
393 | } | |
394 | return data; | |
395 | } | |
396 | ||
06f33c17 | 397 | static struct attr_stack *read_attr_from_index(const char *path, int macro_ok) |
a4413118 JH |
398 | { |
399 | struct attr_stack *res; | |
1a9d7e9b JH |
400 | char *buf, *sp; |
401 | int lineno = 0; | |
f48fd688 | 402 | |
1a9d7e9b JH |
403 | buf = read_index_data(path); |
404 | if (!buf) | |
06f33c17 | 405 | return NULL; |
1a9d7e9b | 406 | |
06f33c17 | 407 | res = xcalloc(1, sizeof(*res)); |
1a9d7e9b JH |
408 | for (sp = buf; *sp; ) { |
409 | char *ep; | |
410 | int more; | |
411 | for (ep = sp; *ep && *ep != '\n'; ep++) | |
412 | ; | |
413 | more = (*ep == '\n'); | |
414 | *ep = '\0'; | |
415 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
416 | sp = ep + more; | |
417 | } | |
418 | free(buf); | |
d0bfd026 JH |
419 | return res; |
420 | } | |
421 | ||
06f33c17 JH |
422 | static struct attr_stack *read_attr(const char *path, int macro_ok) |
423 | { | |
424 | struct attr_stack *res; | |
425 | ||
426 | if (direction == GIT_ATTR_CHECKOUT) { | |
427 | res = read_attr_from_index(path, macro_ok); | |
428 | if (!res) | |
429 | res = read_attr_from_file(path, macro_ok); | |
430 | } | |
4191e80a | 431 | else if (direction == GIT_ATTR_CHECKIN) { |
06f33c17 JH |
432 | res = read_attr_from_file(path, macro_ok); |
433 | if (!res) | |
434 | /* | |
435 | * There is no checked out .gitattributes file there, but | |
436 | * we might have it in the index. We allow operation in a | |
437 | * sparsely checked out work tree, so read from it. | |
438 | */ | |
439 | res = read_attr_from_index(path, macro_ok); | |
440 | } | |
4191e80a NTND |
441 | else |
442 | res = read_attr_from_index(path, macro_ok); | |
06f33c17 JH |
443 | if (!res) |
444 | res = xcalloc(1, sizeof(*res)); | |
445 | return res; | |
446 | } | |
447 | ||
d0bfd026 JH |
448 | #if DEBUG_ATTR |
449 | static void debug_info(const char *what, struct attr_stack *elem) | |
450 | { | |
451 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
452 | } | |
cf94ccda | 453 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) |
f48fd688 | 454 | { |
515106fa JH |
455 | const char *value = v; |
456 | ||
457 | if (ATTR_TRUE(value)) | |
458 | value = "set"; | |
459 | else if (ATTR_FALSE(value)) | |
460 | value = "unset"; | |
461 | else if (ATTR_UNSET(value)) | |
462 | value = "unspecified"; | |
463 | ||
464 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
465 | what, attr->name, (char *) value, match); | |
f48fd688 | 466 | } |
d0bfd026 JH |
467 | #define debug_push(a) debug_info("push", (a)) |
468 | #define debug_pop(a) debug_info("pop", (a)) | |
469 | #else | |
470 | #define debug_push(a) do { ; } while (0) | |
471 | #define debug_pop(a) do { ; } while (0) | |
f48fd688 | 472 | #define debug_set(a,b,c,d) do { ; } while (0) |
d0bfd026 JH |
473 | #endif |
474 | ||
06f33c17 JH |
475 | static void drop_attr_stack(void) |
476 | { | |
477 | while (attr_stack) { | |
478 | struct attr_stack *elem = attr_stack; | |
479 | attr_stack = elem->prev; | |
480 | free_attr_elem(elem); | |
481 | } | |
482 | } | |
483 | ||
c5147722 | 484 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
485 | { |
486 | static const char *system_wide; | |
487 | if (!system_wide) | |
488 | system_wide = system_path(ETC_GITATTRIBUTES); | |
489 | return system_wide; | |
490 | } | |
491 | ||
c5147722 | 492 | static int git_attr_system(void) |
6df42ab9 PO |
493 | { |
494 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
495 | } | |
496 | ||
6df42ab9 PO |
497 | static int git_attr_config(const char *var, const char *value, void *dummy) |
498 | { | |
499 | if (!strcmp(var, "core.attributesfile")) | |
500 | return git_config_pathname(&attributes_file, var, value); | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
f48fd688 JH |
505 | static void bootstrap_attr_stack(void) |
506 | { | |
507 | if (!attr_stack) { | |
508 | struct attr_stack *elem; | |
509 | ||
510 | elem = read_attr_from_array(builtin_attr); | |
511 | elem->origin = NULL; | |
512 | elem->prev = attr_stack; | |
513 | attr_stack = elem; | |
514 | ||
6df42ab9 PO |
515 | if (git_attr_system()) { |
516 | elem = read_attr_from_file(git_etc_gitattributes(), 1); | |
517 | if (elem) { | |
518 | elem->origin = NULL; | |
519 | elem->prev = attr_stack; | |
520 | attr_stack = elem; | |
521 | } | |
522 | } | |
523 | ||
524 | git_config(git_attr_config, NULL); | |
e91b6c50 | 525 | if (attributes_file) { |
6df42ab9 PO |
526 | elem = read_attr_from_file(attributes_file, 1); |
527 | if (elem) { | |
528 | elem->origin = NULL; | |
529 | elem->prev = attr_stack; | |
530 | attr_stack = elem; | |
531 | } | |
532 | } | |
533 | ||
4191e80a | 534 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
2d35d556 RS |
535 | elem = read_attr(GITATTRIBUTES_FILE, 1); |
536 | elem->origin = strdup(""); | |
537 | elem->prev = attr_stack; | |
538 | attr_stack = elem; | |
539 | debug_push(elem); | |
540 | } | |
f48fd688 JH |
541 | |
542 | elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1); | |
a4413118 JH |
543 | if (!elem) |
544 | elem = xcalloc(1, sizeof(*elem)); | |
f48fd688 JH |
545 | elem->origin = NULL; |
546 | elem->prev = attr_stack; | |
547 | attr_stack = elem; | |
548 | } | |
549 | } | |
550 | ||
a8727017 | 551 | static void prepare_attr_stack(const char *path) |
d0bfd026 JH |
552 | { |
553 | struct attr_stack *elem, *info; | |
a8727017 | 554 | int dirlen, len; |
f66cf96d | 555 | struct strbuf pathbuf; |
a8727017 MH |
556 | const char *cp; |
557 | ||
558 | cp = strrchr(path, '/'); | |
559 | if (!cp) | |
560 | dirlen = 0; | |
561 | else | |
562 | dirlen = cp - path; | |
f66cf96d DP |
563 | |
564 | strbuf_init(&pathbuf, dirlen+2+strlen(GITATTRIBUTES_FILE)); | |
d0bfd026 JH |
565 | |
566 | /* | |
567 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
568 | * set of attribute definitions, followed by the contents |
569 | * of $(prefix)/etc/gitattributes and a file specified by | |
570 | * core.attributesfile. Then, contents from | |
d0bfd026 JH |
571 | * .gitattribute files from directories closer to the |
572 | * root to the ones in deeper directories are pushed | |
573 | * to the stack. Finally, at the very top of the stack | |
574 | * we always keep the contents of $GIT_DIR/info/attributes. | |
575 | * | |
576 | * When checking, we use entries from near the top of the | |
577 | * stack, preferring $GIT_DIR/info/attributes, then | |
578 | * .gitattributes in deeper directories to shallower ones, | |
579 | * and finally use the built-in set as the default. | |
580 | */ | |
7373eab4 | 581 | bootstrap_attr_stack(); |
d0bfd026 JH |
582 | |
583 | /* | |
584 | * Pop the "info" one that is always at the top of the stack. | |
585 | */ | |
586 | info = attr_stack; | |
587 | attr_stack = info->prev; | |
588 | ||
589 | /* | |
590 | * Pop the ones from directories that are not the prefix of | |
591 | * the path we are checking. | |
592 | */ | |
593 | while (attr_stack && attr_stack->origin) { | |
594 | int namelen = strlen(attr_stack->origin); | |
595 | ||
596 | elem = attr_stack; | |
597 | if (namelen <= dirlen && | |
598 | !strncmp(elem->origin, path, namelen)) | |
599 | break; | |
600 | ||
601 | debug_pop(elem); | |
602 | attr_stack = elem->prev; | |
603 | free_attr_elem(elem); | |
604 | } | |
605 | ||
606 | /* | |
607 | * Read from parent directories and push them down | |
608 | */ | |
4191e80a | 609 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
2d35d556 RS |
610 | while (1) { |
611 | char *cp; | |
612 | ||
613 | len = strlen(attr_stack->origin); | |
614 | if (dirlen <= len) | |
615 | break; | |
f66cf96d DP |
616 | strbuf_reset(&pathbuf); |
617 | strbuf_add(&pathbuf, path, dirlen); | |
618 | strbuf_addch(&pathbuf, '/'); | |
619 | cp = strchr(pathbuf.buf + len + 1, '/'); | |
2d35d556 | 620 | strcpy(cp + 1, GITATTRIBUTES_FILE); |
f66cf96d | 621 | elem = read_attr(pathbuf.buf, 0); |
2d35d556 | 622 | *cp = '\0'; |
f66cf96d | 623 | elem->origin = strdup(pathbuf.buf); |
2d35d556 RS |
624 | elem->prev = attr_stack; |
625 | attr_stack = elem; | |
626 | debug_push(elem); | |
627 | } | |
d0bfd026 JH |
628 | } |
629 | ||
d4c98565 RS |
630 | strbuf_release(&pathbuf); |
631 | ||
d0bfd026 JH |
632 | /* |
633 | * Finally push the "info" one at the top of the stack. | |
634 | */ | |
635 | info->prev = attr_stack; | |
636 | attr_stack = info; | |
637 | } | |
638 | ||
639 | static int path_matches(const char *pathname, int pathlen, | |
640 | const char *pattern, | |
641 | const char *base, int baselen) | |
642 | { | |
643 | if (!strchr(pattern, '/')) { | |
644 | /* match basename */ | |
645 | const char *basename = strrchr(pathname, '/'); | |
646 | basename = basename ? basename + 1 : pathname; | |
647 | return (fnmatch(pattern, basename, 0) == 0); | |
648 | } | |
649 | /* | |
650 | * match with FNM_PATHNAME; the pattern has base implicitly | |
651 | * in front of it. | |
652 | */ | |
653 | if (*pattern == '/') | |
654 | pattern++; | |
655 | if (pathlen < baselen || | |
cf94ccda | 656 | (baselen && pathname[baselen] != '/') || |
d0bfd026 JH |
657 | strncmp(pathname, base, baselen)) |
658 | return 0; | |
82881b38 MO |
659 | if (baselen != 0) |
660 | baselen++; | |
661 | return fnmatch(pattern, pathname + baselen, FNM_PATHNAME) == 0; | |
d0bfd026 JH |
662 | } |
663 | ||
ec775c41 HG |
664 | static int macroexpand_one(int attr_nr, int rem); |
665 | ||
515106fa JH |
666 | static int fill_one(const char *what, struct match_attr *a, int rem) |
667 | { | |
668 | struct git_attr_check *check = check_all_attr; | |
669 | int i; | |
670 | ||
969f9d73 | 671 | for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) { |
515106fa | 672 | struct git_attr *attr = a->state[i].attr; |
a5e92abd JH |
673 | const char **n = &(check[attr->attr_nr].value); |
674 | const char *v = a->state[i].setto; | |
515106fa JH |
675 | |
676 | if (*n == ATTR__UNKNOWN) { | |
426c27b7 HG |
677 | debug_set(what, |
678 | a->is_macro ? a->u.attr->name : a->u.pattern, | |
679 | attr, v); | |
515106fa JH |
680 | *n = v; |
681 | rem--; | |
ec775c41 | 682 | rem = macroexpand_one(attr->attr_nr, rem); |
515106fa JH |
683 | } |
684 | } | |
685 | return rem; | |
686 | } | |
687 | ||
f48fd688 | 688 | static int fill(const char *path, int pathlen, struct attr_stack *stk, int rem) |
d0bfd026 | 689 | { |
515106fa | 690 | int i; |
d0bfd026 JH |
691 | const char *base = stk->origin ? stk->origin : ""; |
692 | ||
693 | for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) { | |
694 | struct match_attr *a = stk->attrs[i]; | |
f48fd688 JH |
695 | if (a->is_macro) |
696 | continue; | |
d0bfd026 | 697 | if (path_matches(path, pathlen, |
515106fa JH |
698 | a->u.pattern, base, strlen(base))) |
699 | rem = fill_one("fill", a, rem); | |
d0bfd026 JH |
700 | } |
701 | return rem; | |
702 | } | |
703 | ||
ec775c41 | 704 | static int macroexpand_one(int attr_nr, int rem) |
f48fd688 | 705 | { |
ec775c41 HG |
706 | struct attr_stack *stk; |
707 | struct match_attr *a = NULL; | |
515106fa | 708 | int i; |
f48fd688 | 709 | |
ec775c41 HG |
710 | if (check_all_attr[attr_nr].value != ATTR__TRUE) |
711 | return rem; | |
712 | ||
713 | for (stk = attr_stack; !a && stk; stk = stk->prev) | |
714 | for (i = stk->num_matches - 1; !a && 0 <= i; i--) { | |
715 | struct match_attr *ma = stk->attrs[i]; | |
716 | if (!ma->is_macro) | |
717 | continue; | |
718 | if (ma->u.attr->attr_nr == attr_nr) | |
719 | a = ma; | |
720 | } | |
721 | ||
722 | if (a) | |
515106fa | 723 | rem = fill_one("expand", a, rem); |
ec775c41 | 724 | |
f48fd688 JH |
725 | return rem; |
726 | } | |
727 | ||
2d721744 MH |
728 | /* |
729 | * Collect all attributes for path into the array pointed to by | |
730 | * check_all_attr. | |
731 | */ | |
732 | static void collect_all_attrs(const char *path) | |
d0bfd026 JH |
733 | { |
734 | struct attr_stack *stk; | |
2d721744 | 735 | int i, pathlen, rem; |
d0bfd026 | 736 | |
2d721744 | 737 | prepare_attr_stack(path); |
f48fd688 | 738 | for (i = 0; i < attr_nr; i++) |
515106fa | 739 | check_all_attr[i].value = ATTR__UNKNOWN; |
d0bfd026 JH |
740 | |
741 | pathlen = strlen(path); | |
f48fd688 JH |
742 | rem = attr_nr; |
743 | for (stk = attr_stack; 0 < rem && stk; stk = stk->prev) | |
744 | rem = fill(path, pathlen, stk, rem); | |
2d721744 MH |
745 | } |
746 | ||
d932f4eb | 747 | int git_check_attr(const char *path, int num, struct git_attr_check *check) |
2d721744 MH |
748 | { |
749 | int i; | |
750 | ||
751 | collect_all_attrs(path); | |
f48fd688 | 752 | |
515106fa | 753 | for (i = 0; i < num; i++) { |
a5e92abd | 754 | const char *value = check_all_attr[check[i].attr->attr_nr].value; |
515106fa JH |
755 | if (value == ATTR__UNKNOWN) |
756 | value = ATTR__UNSET; | |
757 | check[i].value = value; | |
758 | } | |
f48fd688 | 759 | |
d0bfd026 JH |
760 | return 0; |
761 | } | |
06f33c17 | 762 | |
ee548df3 MH |
763 | int git_all_attrs(const char *path, int *num, struct git_attr_check **check) |
764 | { | |
765 | int i, count, j; | |
766 | ||
767 | collect_all_attrs(path); | |
768 | ||
769 | /* Count the number of attributes that are set. */ | |
770 | count = 0; | |
771 | for (i = 0; i < attr_nr; i++) { | |
772 | const char *value = check_all_attr[i].value; | |
773 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) | |
774 | ++count; | |
775 | } | |
776 | *num = count; | |
777 | *check = xmalloc(sizeof(**check) * count); | |
778 | j = 0; | |
779 | for (i = 0; i < attr_nr; i++) { | |
780 | const char *value = check_all_attr[i].value; | |
781 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) { | |
782 | (*check)[j].attr = check_all_attr[i].attr; | |
783 | (*check)[j].value = value; | |
784 | ++j; | |
785 | } | |
786 | } | |
787 | ||
788 | return 0; | |
789 | } | |
790 | ||
06f33c17 JH |
791 | void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate) |
792 | { | |
793 | enum git_attr_direction old = direction; | |
4191e80a NTND |
794 | |
795 | if (is_bare_repository() && new != GIT_ATTR_INDEX) | |
796 | die("BUG: non-INDEX attr direction in a bare repo"); | |
797 | ||
06f33c17 JH |
798 | direction = new; |
799 | if (new != old) | |
800 | drop_attr_stack(); | |
801 | use_index = istate; | |
802 | } |