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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 | |
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 | |
86ab7f0c | 23 | /* This is a randomly chosen prime. */ |
d0bfd026 JH |
24 | #define HASHSIZE 257 |
25 | ||
26 | #ifndef DEBUG_ATTR | |
27 | #define DEBUG_ATTR 0 | |
28 | #endif | |
29 | ||
30 | struct git_attr { | |
31 | struct git_attr *next; | |
32 | unsigned h; | |
f48fd688 | 33 | int attr_nr; |
d0bfd026 JH |
34 | char name[FLEX_ARRAY]; |
35 | }; | |
f48fd688 | 36 | static int attr_nr; |
d0bfd026 | 37 | |
f48fd688 | 38 | static struct git_attr_check *check_all_attr; |
d0bfd026 JH |
39 | static struct git_attr *(git_attr_hash[HASHSIZE]); |
40 | ||
352404ac MH |
41 | char *git_attr_name(struct git_attr *attr) |
42 | { | |
43 | return attr->name; | |
44 | } | |
45 | ||
d0bfd026 JH |
46 | static unsigned hash_name(const char *name, int namelen) |
47 | { | |
48fb7deb | 48 | unsigned val = 0, c; |
d0bfd026 JH |
49 | |
50 | while (namelen--) { | |
51 | c = *name++; | |
52 | val = ((val << 7) | (val >> 22)) ^ c; | |
53 | } | |
54 | return val; | |
55 | } | |
56 | ||
e4aee10a JH |
57 | static int invalid_attr_name(const char *name, int namelen) |
58 | { | |
59 | /* | |
d42453ab MH |
60 | * Attribute name cannot begin with '-' and must consist of |
61 | * characters from [-A-Za-z0-9_.]. | |
e4aee10a | 62 | */ |
c0b13b21 | 63 | if (namelen <= 0 || *name == '-') |
e4aee10a JH |
64 | return -1; |
65 | while (namelen--) { | |
66 | char ch = *name++; | |
67 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
68 | ('0' <= ch && ch <= '9') || | |
69 | ('a' <= ch && ch <= 'z') || | |
70 | ('A' <= ch && ch <= 'Z')) ) | |
71 | return -1; | |
72 | } | |
73 | return 0; | |
74 | } | |
75 | ||
7fb0eaa2 | 76 | static struct git_attr *git_attr_internal(const char *name, int len) |
d0bfd026 JH |
77 | { |
78 | unsigned hval = hash_name(name, len); | |
79 | unsigned pos = hval % HASHSIZE; | |
80 | struct git_attr *a; | |
81 | ||
82 | for (a = git_attr_hash[pos]; a; a = a->next) { | |
83 | if (a->h == hval && | |
84 | !memcmp(a->name, name, len) && !a->name[len]) | |
85 | return a; | |
86 | } | |
87 | ||
e4aee10a JH |
88 | if (invalid_attr_name(name, len)) |
89 | return NULL; | |
90 | ||
d0bfd026 JH |
91 | a = xmalloc(sizeof(*a) + len + 1); |
92 | memcpy(a->name, name, len); | |
93 | a->name[len] = 0; | |
94 | a->h = hval; | |
95 | a->next = git_attr_hash[pos]; | |
f48fd688 | 96 | a->attr_nr = attr_nr++; |
d0bfd026 | 97 | git_attr_hash[pos] = a; |
f48fd688 JH |
98 | |
99 | check_all_attr = xrealloc(check_all_attr, | |
100 | sizeof(*check_all_attr) * attr_nr); | |
101 | check_all_attr[a->attr_nr].attr = a; | |
515106fa | 102 | check_all_attr[a->attr_nr].value = ATTR__UNKNOWN; |
d0bfd026 JH |
103 | return a; |
104 | } | |
105 | ||
7fb0eaa2 JH |
106 | struct git_attr *git_attr(const char *name) |
107 | { | |
108 | return git_attr_internal(name, strlen(name)); | |
109 | } | |
110 | ||
515106fa | 111 | /* What does a matched pattern decide? */ |
d0bfd026 | 112 | struct attr_state { |
d0bfd026 | 113 | struct git_attr *attr; |
a5e92abd | 114 | const char *setto; |
d0bfd026 JH |
115 | }; |
116 | ||
ba845b75 MH |
117 | /* |
118 | * One rule, as from a .gitattributes file. | |
119 | * | |
120 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
121 | * defined. | |
122 | * | |
123 | * If is_macro is false, then u.pattern points at the filename pattern | |
124 | * to which the rule applies. (The memory pointed to is part of the | |
125 | * memory block allocated for the match_attr instance.) | |
126 | * | |
127 | * In either case, num_attr is the number of attributes affected by | |
128 | * this rule, and state is an array listing them. The attributes are | |
129 | * listed as they appear in the file (macros unexpanded). | |
130 | */ | |
d0bfd026 | 131 | struct match_attr { |
f48fd688 JH |
132 | union { |
133 | char *pattern; | |
134 | struct git_attr *attr; | |
135 | } u; | |
136 | char is_macro; | |
d0bfd026 JH |
137 | unsigned num_attr; |
138 | struct attr_state state[FLEX_ARRAY]; | |
139 | }; | |
140 | ||
141 | static const char blank[] = " \t\r\n"; | |
142 | ||
d1751298 MH |
143 | /* |
144 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
145 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
146 | * If e is not NULL, write the results to *e. Return a pointer to the | |
147 | * remainder of the string (with leading whitespace removed), or NULL | |
148 | * if there was an error. | |
149 | */ | |
515106fa | 150 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
d1751298 | 151 | struct attr_state *e) |
515106fa JH |
152 | { |
153 | const char *ep, *equals; | |
154 | int len; | |
155 | ||
156 | ep = cp + strcspn(cp, blank); | |
157 | equals = strchr(cp, '='); | |
158 | if (equals && ep < equals) | |
159 | equals = NULL; | |
160 | if (equals) | |
161 | len = equals - cp; | |
162 | else | |
163 | len = ep - cp; | |
d1751298 | 164 | if (!e) { |
515106fa JH |
165 | if (*cp == '-' || *cp == '!') { |
166 | cp++; | |
167 | len--; | |
168 | } | |
169 | if (invalid_attr_name(cp, len)) { | |
170 | fprintf(stderr, | |
171 | "%.*s is not a valid attribute name: %s:%d\n", | |
172 | len, cp, src, lineno); | |
173 | return NULL; | |
174 | } | |
175 | } else { | |
515106fa JH |
176 | if (*cp == '-' || *cp == '!') { |
177 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
178 | cp++; | |
179 | len--; | |
180 | } | |
181 | else if (!equals) | |
182 | e->setto = ATTR__TRUE; | |
183 | else { | |
182af834 | 184 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 185 | } |
7fb0eaa2 | 186 | e->attr = git_attr_internal(cp, len); |
515106fa | 187 | } |
515106fa JH |
188 | return ep + strspn(ep, blank); |
189 | } | |
190 | ||
f48fd688 JH |
191 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
192 | int lineno, int macro_ok) | |
d0bfd026 JH |
193 | { |
194 | int namelen; | |
d68e1c18 | 195 | int num_attr, i; |
85c4a0d0 | 196 | const char *cp, *name, *states; |
515106fa | 197 | struct match_attr *res = NULL; |
f48fd688 | 198 | int is_macro; |
d0bfd026 JH |
199 | |
200 | cp = line + strspn(line, blank); | |
201 | if (!*cp || *cp == '#') | |
202 | return NULL; | |
203 | name = cp; | |
204 | namelen = strcspn(name, blank); | |
f48fd688 JH |
205 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && |
206 | !prefixcmp(name, ATTRIBUTE_MACRO_PREFIX)) { | |
207 | if (!macro_ok) { | |
208 | fprintf(stderr, "%s not allowed: %s:%d\n", | |
209 | name, src, lineno); | |
210 | return NULL; | |
211 | } | |
212 | is_macro = 1; | |
213 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
214 | name += strspn(name, blank); | |
215 | namelen = strcspn(name, blank); | |
e4aee10a JH |
216 | if (invalid_attr_name(name, namelen)) { |
217 | fprintf(stderr, | |
218 | "%.*s is not a valid attribute name: %s:%d\n", | |
219 | namelen, name, src, lineno); | |
220 | return NULL; | |
221 | } | |
f48fd688 JH |
222 | } |
223 | else | |
224 | is_macro = 0; | |
d0bfd026 | 225 | |
85c4a0d0 MH |
226 | states = name + namelen; |
227 | states += strspn(states, blank); | |
228 | ||
d68e1c18 MH |
229 | /* First pass to count the attr_states */ |
230 | for (cp = states, num_attr = 0; *cp; num_attr++) { | |
231 | cp = parse_attr(src, lineno, cp, NULL); | |
232 | if (!cp) | |
233 | return NULL; | |
d0bfd026 | 234 | } |
d68e1c18 MH |
235 | |
236 | res = xcalloc(1, | |
237 | sizeof(*res) + | |
238 | sizeof(struct attr_state) * num_attr + | |
239 | (is_macro ? 0 : namelen + 1)); | |
240 | if (is_macro) | |
241 | res->u.attr = git_attr_internal(name, namelen); | |
242 | else { | |
243 | res->u.pattern = (char *)&(res->state[num_attr]); | |
244 | memcpy(res->u.pattern, name, namelen); | |
245 | res->u.pattern[namelen] = 0; | |
d0bfd026 | 246 | } |
d68e1c18 MH |
247 | res->is_macro = is_macro; |
248 | res->num_attr = num_attr; | |
249 | ||
250 | /* Second pass to fill the attr_states */ | |
251 | for (cp = states, i = 0; *cp; i++) { | |
252 | cp = parse_attr(src, lineno, cp, &(res->state[i])); | |
253 | } | |
254 | ||
d0bfd026 JH |
255 | return res; |
256 | } | |
257 | ||
258 | /* | |
259 | * Like info/exclude and .gitignore, the attribute information can | |
260 | * come from many places. | |
261 | * | |
262 | * (1) .gitattribute file of the same directory; | |
515106fa JH |
263 | * (2) .gitattribute file of the parent directory if (1) does not have |
264 | * any match; this goes recursively upwards, just like .gitignore. | |
265 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
266 | * |
267 | * In the same file, later entries override the earlier match, so in the | |
268 | * global list, we would have entries from info/attributes the earliest | |
269 | * (reading the file from top to bottom), .gitattribute of the root | |
270 | * directory (again, reading the file from top to bottom) down to the | |
271 | * current directory, and then scan the list backwards to find the first match. | |
272 | * This is exactly the same as what excluded() does in dir.c to deal with | |
273 | * .gitignore | |
274 | */ | |
275 | ||
276 | static struct attr_stack { | |
277 | struct attr_stack *prev; | |
278 | char *origin; | |
279 | unsigned num_matches; | |
a4413118 | 280 | unsigned alloc; |
d0bfd026 JH |
281 | struct match_attr **attrs; |
282 | } *attr_stack; | |
283 | ||
284 | static void free_attr_elem(struct attr_stack *e) | |
285 | { | |
286 | int i; | |
287 | free(e->origin); | |
515106fa JH |
288 | for (i = 0; i < e->num_matches; i++) { |
289 | struct match_attr *a = e->attrs[i]; | |
290 | int j; | |
291 | for (j = 0; j < a->num_attr; j++) { | |
a5e92abd | 292 | const char *setto = a->state[j].setto; |
515106fa JH |
293 | if (setto == ATTR__TRUE || |
294 | setto == ATTR__FALSE || | |
295 | setto == ATTR__UNSET || | |
296 | setto == ATTR__UNKNOWN) | |
297 | ; | |
298 | else | |
4b25d091 | 299 | free((char *) setto); |
515106fa JH |
300 | } |
301 | free(a); | |
302 | } | |
d0bfd026 JH |
303 | free(e); |
304 | } | |
305 | ||
306 | static const char *builtin_attr[] = { | |
5ec3e670 | 307 | "[attr]binary -diff -text", |
d0bfd026 JH |
308 | NULL, |
309 | }; | |
310 | ||
a4413118 JH |
311 | static void handle_attr_line(struct attr_stack *res, |
312 | const char *line, | |
313 | const char *src, | |
314 | int lineno, | |
315 | int macro_ok) | |
316 | { | |
317 | struct match_attr *a; | |
318 | ||
319 | a = parse_attr_line(line, src, lineno, macro_ok); | |
320 | if (!a) | |
321 | return; | |
322 | if (res->alloc <= res->num_matches) { | |
323 | res->alloc = alloc_nr(res->num_matches); | |
324 | res->attrs = xrealloc(res->attrs, | |
325 | sizeof(struct match_attr *) * | |
326 | res->alloc); | |
327 | } | |
328 | res->attrs[res->num_matches++] = a; | |
329 | } | |
330 | ||
d0bfd026 JH |
331 | static struct attr_stack *read_attr_from_array(const char **list) |
332 | { | |
333 | struct attr_stack *res; | |
334 | const char *line; | |
f48fd688 | 335 | int lineno = 0; |
d0bfd026 JH |
336 | |
337 | res = xcalloc(1, sizeof(*res)); | |
a4413118 JH |
338 | while ((line = *(list++)) != NULL) |
339 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
d0bfd026 JH |
340 | return res; |
341 | } | |
342 | ||
06f33c17 JH |
343 | static enum git_attr_direction direction; |
344 | static struct index_state *use_index; | |
345 | ||
f48fd688 | 346 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) |
d0bfd026 | 347 | { |
a4413118 | 348 | FILE *fp = fopen(path, "r"); |
d0bfd026 JH |
349 | struct attr_stack *res; |
350 | char buf[2048]; | |
f48fd688 | 351 | int lineno = 0; |
d0bfd026 | 352 | |
d0bfd026 | 353 | if (!fp) |
a4413118 JH |
354 | return NULL; |
355 | res = xcalloc(1, sizeof(*res)); | |
356 | while (fgets(buf, sizeof(buf), fp)) | |
357 | handle_attr_line(res, buf, path, ++lineno, macro_ok); | |
358 | fclose(fp); | |
359 | return res; | |
360 | } | |
d0bfd026 | 361 | |
1a9d7e9b JH |
362 | static void *read_index_data(const char *path) |
363 | { | |
364 | int pos, len; | |
365 | unsigned long sz; | |
366 | enum object_type type; | |
367 | void *data; | |
06f33c17 | 368 | struct index_state *istate = use_index ? use_index : &the_index; |
1a9d7e9b JH |
369 | |
370 | len = strlen(path); | |
06f33c17 | 371 | pos = index_name_pos(istate, path, len); |
1a9d7e9b JH |
372 | if (pos < 0) { |
373 | /* | |
374 | * We might be in the middle of a merge, in which | |
375 | * case we would read stage #2 (ours). | |
376 | */ | |
377 | int i; | |
378 | for (i = -pos - 1; | |
06f33c17 JH |
379 | (pos < 0 && i < istate->cache_nr && |
380 | !strcmp(istate->cache[i]->name, path)); | |
1a9d7e9b | 381 | i++) |
06f33c17 | 382 | if (ce_stage(istate->cache[i]) == 2) |
1a9d7e9b JH |
383 | pos = i; |
384 | } | |
385 | if (pos < 0) | |
386 | return NULL; | |
06f33c17 | 387 | data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz); |
1a9d7e9b JH |
388 | if (!data || type != OBJ_BLOB) { |
389 | free(data); | |
390 | return NULL; | |
391 | } | |
392 | return data; | |
393 | } | |
394 | ||
06f33c17 | 395 | static struct attr_stack *read_attr_from_index(const char *path, int macro_ok) |
a4413118 JH |
396 | { |
397 | struct attr_stack *res; | |
1a9d7e9b JH |
398 | char *buf, *sp; |
399 | int lineno = 0; | |
f48fd688 | 400 | |
1a9d7e9b JH |
401 | buf = read_index_data(path); |
402 | if (!buf) | |
06f33c17 | 403 | return NULL; |
1a9d7e9b | 404 | |
06f33c17 | 405 | res = xcalloc(1, sizeof(*res)); |
1a9d7e9b JH |
406 | for (sp = buf; *sp; ) { |
407 | char *ep; | |
408 | int more; | |
409 | for (ep = sp; *ep && *ep != '\n'; ep++) | |
410 | ; | |
411 | more = (*ep == '\n'); | |
412 | *ep = '\0'; | |
413 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
414 | sp = ep + more; | |
415 | } | |
416 | free(buf); | |
d0bfd026 JH |
417 | return res; |
418 | } | |
419 | ||
06f33c17 JH |
420 | static struct attr_stack *read_attr(const char *path, int macro_ok) |
421 | { | |
422 | struct attr_stack *res; | |
423 | ||
424 | if (direction == GIT_ATTR_CHECKOUT) { | |
425 | res = read_attr_from_index(path, macro_ok); | |
426 | if (!res) | |
427 | res = read_attr_from_file(path, macro_ok); | |
428 | } | |
4191e80a | 429 | else if (direction == GIT_ATTR_CHECKIN) { |
06f33c17 JH |
430 | res = read_attr_from_file(path, macro_ok); |
431 | if (!res) | |
432 | /* | |
433 | * There is no checked out .gitattributes file there, but | |
434 | * we might have it in the index. We allow operation in a | |
435 | * sparsely checked out work tree, so read from it. | |
436 | */ | |
437 | res = read_attr_from_index(path, macro_ok); | |
438 | } | |
4191e80a NTND |
439 | else |
440 | res = read_attr_from_index(path, macro_ok); | |
06f33c17 JH |
441 | if (!res) |
442 | res = xcalloc(1, sizeof(*res)); | |
443 | return res; | |
444 | } | |
445 | ||
d0bfd026 JH |
446 | #if DEBUG_ATTR |
447 | static void debug_info(const char *what, struct attr_stack *elem) | |
448 | { | |
449 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
450 | } | |
cf94ccda | 451 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) |
f48fd688 | 452 | { |
515106fa JH |
453 | const char *value = v; |
454 | ||
455 | if (ATTR_TRUE(value)) | |
456 | value = "set"; | |
457 | else if (ATTR_FALSE(value)) | |
458 | value = "unset"; | |
459 | else if (ATTR_UNSET(value)) | |
460 | value = "unspecified"; | |
461 | ||
462 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
463 | what, attr->name, (char *) value, match); | |
f48fd688 | 464 | } |
d0bfd026 JH |
465 | #define debug_push(a) debug_info("push", (a)) |
466 | #define debug_pop(a) debug_info("pop", (a)) | |
467 | #else | |
468 | #define debug_push(a) do { ; } while (0) | |
469 | #define debug_pop(a) do { ; } while (0) | |
f48fd688 | 470 | #define debug_set(a,b,c,d) do { ; } while (0) |
d0bfd026 JH |
471 | #endif |
472 | ||
06f33c17 JH |
473 | static void drop_attr_stack(void) |
474 | { | |
475 | while (attr_stack) { | |
476 | struct attr_stack *elem = attr_stack; | |
477 | attr_stack = elem->prev; | |
478 | free_attr_elem(elem); | |
479 | } | |
480 | } | |
481 | ||
c5147722 | 482 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
483 | { |
484 | static const char *system_wide; | |
485 | if (!system_wide) | |
486 | system_wide = system_path(ETC_GITATTRIBUTES); | |
487 | return system_wide; | |
488 | } | |
489 | ||
c5147722 | 490 | static int git_attr_system(void) |
6df42ab9 PO |
491 | { |
492 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
493 | } | |
494 | ||
f48fd688 JH |
495 | static void bootstrap_attr_stack(void) |
496 | { | |
497 | if (!attr_stack) { | |
498 | struct attr_stack *elem; | |
499 | ||
500 | elem = read_attr_from_array(builtin_attr); | |
501 | elem->origin = NULL; | |
502 | elem->prev = attr_stack; | |
503 | attr_stack = elem; | |
504 | ||
6df42ab9 PO |
505 | if (git_attr_system()) { |
506 | elem = read_attr_from_file(git_etc_gitattributes(), 1); | |
507 | if (elem) { | |
508 | elem->origin = NULL; | |
509 | elem->prev = attr_stack; | |
510 | attr_stack = elem; | |
511 | } | |
512 | } | |
513 | ||
64589a03 JH |
514 | if (git_attributes_file) { |
515 | elem = read_attr_from_file(git_attributes_file, 1); | |
6df42ab9 PO |
516 | if (elem) { |
517 | elem->origin = NULL; | |
518 | elem->prev = attr_stack; | |
519 | attr_stack = elem; | |
520 | } | |
521 | } | |
522 | ||
4191e80a | 523 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
2d35d556 | 524 | elem = read_attr(GITATTRIBUTES_FILE, 1); |
040a6551 | 525 | elem->origin = xstrdup(""); |
2d35d556 RS |
526 | elem->prev = attr_stack; |
527 | attr_stack = elem; | |
528 | debug_push(elem); | |
529 | } | |
f48fd688 JH |
530 | |
531 | elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1); | |
a4413118 JH |
532 | if (!elem) |
533 | elem = xcalloc(1, sizeof(*elem)); | |
f48fd688 JH |
534 | elem->origin = NULL; |
535 | elem->prev = attr_stack; | |
536 | attr_stack = elem; | |
537 | } | |
538 | } | |
539 | ||
a8727017 | 540 | static void prepare_attr_stack(const char *path) |
d0bfd026 JH |
541 | { |
542 | struct attr_stack *elem, *info; | |
a8727017 | 543 | int dirlen, len; |
a8727017 MH |
544 | const char *cp; |
545 | ||
546 | cp = strrchr(path, '/'); | |
547 | if (!cp) | |
548 | dirlen = 0; | |
549 | else | |
550 | dirlen = cp - path; | |
f66cf96d | 551 | |
d0bfd026 JH |
552 | /* |
553 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
554 | * set of attribute definitions, followed by the contents |
555 | * of $(prefix)/etc/gitattributes and a file specified by | |
556 | * core.attributesfile. Then, contents from | |
d0bfd026 JH |
557 | * .gitattribute files from directories closer to the |
558 | * root to the ones in deeper directories are pushed | |
559 | * to the stack. Finally, at the very top of the stack | |
560 | * we always keep the contents of $GIT_DIR/info/attributes. | |
561 | * | |
562 | * When checking, we use entries from near the top of the | |
563 | * stack, preferring $GIT_DIR/info/attributes, then | |
564 | * .gitattributes in deeper directories to shallower ones, | |
565 | * and finally use the built-in set as the default. | |
566 | */ | |
7373eab4 | 567 | bootstrap_attr_stack(); |
d0bfd026 JH |
568 | |
569 | /* | |
570 | * Pop the "info" one that is always at the top of the stack. | |
571 | */ | |
572 | info = attr_stack; | |
573 | attr_stack = info->prev; | |
574 | ||
575 | /* | |
576 | * Pop the ones from directories that are not the prefix of | |
577 | * the path we are checking. | |
578 | */ | |
579 | while (attr_stack && attr_stack->origin) { | |
580 | int namelen = strlen(attr_stack->origin); | |
581 | ||
582 | elem = attr_stack; | |
583 | if (namelen <= dirlen && | |
584 | !strncmp(elem->origin, path, namelen)) | |
585 | break; | |
586 | ||
587 | debug_pop(elem); | |
588 | attr_stack = elem->prev; | |
589 | free_attr_elem(elem); | |
590 | } | |
591 | ||
592 | /* | |
593 | * Read from parent directories and push them down | |
594 | */ | |
4191e80a | 595 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
97410b27 | 596 | struct strbuf pathbuf = STRBUF_INIT; |
2d35d556 | 597 | |
97410b27 | 598 | while (1) { |
2d35d556 RS |
599 | len = strlen(attr_stack->origin); |
600 | if (dirlen <= len) | |
601 | break; | |
97410b27 BC |
602 | cp = memchr(path + len + 1, '/', dirlen - len - 1); |
603 | if (!cp) | |
604 | cp = path + dirlen; | |
605 | strbuf_add(&pathbuf, path, cp - path); | |
f66cf96d | 606 | strbuf_addch(&pathbuf, '/'); |
97410b27 | 607 | strbuf_addstr(&pathbuf, GITATTRIBUTES_FILE); |
f66cf96d | 608 | elem = read_attr(pathbuf.buf, 0); |
97410b27 BC |
609 | strbuf_setlen(&pathbuf, cp - path); |
610 | elem->origin = strbuf_detach(&pathbuf, NULL); | |
2d35d556 RS |
611 | elem->prev = attr_stack; |
612 | attr_stack = elem; | |
613 | debug_push(elem); | |
614 | } | |
d0bfd026 | 615 | |
97410b27 BC |
616 | strbuf_release(&pathbuf); |
617 | } | |
d4c98565 | 618 | |
d0bfd026 JH |
619 | /* |
620 | * Finally push the "info" one at the top of the stack. | |
621 | */ | |
622 | info->prev = attr_stack; | |
623 | attr_stack = info; | |
624 | } | |
625 | ||
626 | static int path_matches(const char *pathname, int pathlen, | |
627 | const char *pattern, | |
628 | const char *base, int baselen) | |
629 | { | |
630 | if (!strchr(pattern, '/')) { | |
631 | /* match basename */ | |
632 | const char *basename = strrchr(pathname, '/'); | |
633 | basename = basename ? basename + 1 : pathname; | |
634 | return (fnmatch(pattern, basename, 0) == 0); | |
635 | } | |
636 | /* | |
637 | * match with FNM_PATHNAME; the pattern has base implicitly | |
638 | * in front of it. | |
639 | */ | |
640 | if (*pattern == '/') | |
641 | pattern++; | |
642 | if (pathlen < baselen || | |
cf94ccda | 643 | (baselen && pathname[baselen] != '/') || |
d0bfd026 JH |
644 | strncmp(pathname, base, baselen)) |
645 | return 0; | |
82881b38 MO |
646 | if (baselen != 0) |
647 | baselen++; | |
648 | return fnmatch(pattern, pathname + baselen, FNM_PATHNAME) == 0; | |
d0bfd026 JH |
649 | } |
650 | ||
ec775c41 HG |
651 | static int macroexpand_one(int attr_nr, int rem); |
652 | ||
515106fa JH |
653 | static int fill_one(const char *what, struct match_attr *a, int rem) |
654 | { | |
655 | struct git_attr_check *check = check_all_attr; | |
656 | int i; | |
657 | ||
969f9d73 | 658 | for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) { |
515106fa | 659 | struct git_attr *attr = a->state[i].attr; |
a5e92abd JH |
660 | const char **n = &(check[attr->attr_nr].value); |
661 | const char *v = a->state[i].setto; | |
515106fa JH |
662 | |
663 | if (*n == ATTR__UNKNOWN) { | |
426c27b7 HG |
664 | debug_set(what, |
665 | a->is_macro ? a->u.attr->name : a->u.pattern, | |
666 | attr, v); | |
515106fa JH |
667 | *n = v; |
668 | rem--; | |
ec775c41 | 669 | rem = macroexpand_one(attr->attr_nr, rem); |
515106fa JH |
670 | } |
671 | } | |
672 | return rem; | |
673 | } | |
674 | ||
f48fd688 | 675 | static int fill(const char *path, int pathlen, struct attr_stack *stk, int rem) |
d0bfd026 | 676 | { |
515106fa | 677 | int i; |
d0bfd026 JH |
678 | const char *base = stk->origin ? stk->origin : ""; |
679 | ||
680 | for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) { | |
681 | struct match_attr *a = stk->attrs[i]; | |
f48fd688 JH |
682 | if (a->is_macro) |
683 | continue; | |
d0bfd026 | 684 | if (path_matches(path, pathlen, |
515106fa JH |
685 | a->u.pattern, base, strlen(base))) |
686 | rem = fill_one("fill", a, rem); | |
d0bfd026 JH |
687 | } |
688 | return rem; | |
689 | } | |
690 | ||
ec775c41 | 691 | static int macroexpand_one(int attr_nr, int rem) |
f48fd688 | 692 | { |
ec775c41 HG |
693 | struct attr_stack *stk; |
694 | struct match_attr *a = NULL; | |
515106fa | 695 | int i; |
f48fd688 | 696 | |
ec775c41 HG |
697 | if (check_all_attr[attr_nr].value != ATTR__TRUE) |
698 | return rem; | |
699 | ||
700 | for (stk = attr_stack; !a && stk; stk = stk->prev) | |
701 | for (i = stk->num_matches - 1; !a && 0 <= i; i--) { | |
702 | struct match_attr *ma = stk->attrs[i]; | |
703 | if (!ma->is_macro) | |
704 | continue; | |
705 | if (ma->u.attr->attr_nr == attr_nr) | |
706 | a = ma; | |
707 | } | |
708 | ||
709 | if (a) | |
515106fa | 710 | rem = fill_one("expand", a, rem); |
ec775c41 | 711 | |
f48fd688 JH |
712 | return rem; |
713 | } | |
714 | ||
2d721744 MH |
715 | /* |
716 | * Collect all attributes for path into the array pointed to by | |
717 | * check_all_attr. | |
718 | */ | |
719 | static void collect_all_attrs(const char *path) | |
d0bfd026 JH |
720 | { |
721 | struct attr_stack *stk; | |
2d721744 | 722 | int i, pathlen, rem; |
d0bfd026 | 723 | |
2d721744 | 724 | prepare_attr_stack(path); |
f48fd688 | 725 | for (i = 0; i < attr_nr; i++) |
515106fa | 726 | check_all_attr[i].value = ATTR__UNKNOWN; |
d0bfd026 JH |
727 | |
728 | pathlen = strlen(path); | |
f48fd688 JH |
729 | rem = attr_nr; |
730 | for (stk = attr_stack; 0 < rem && stk; stk = stk->prev) | |
731 | rem = fill(path, pathlen, stk, rem); | |
2d721744 MH |
732 | } |
733 | ||
d932f4eb | 734 | int git_check_attr(const char *path, int num, struct git_attr_check *check) |
2d721744 MH |
735 | { |
736 | int i; | |
737 | ||
738 | collect_all_attrs(path); | |
f48fd688 | 739 | |
515106fa | 740 | for (i = 0; i < num; i++) { |
a5e92abd | 741 | const char *value = check_all_attr[check[i].attr->attr_nr].value; |
515106fa JH |
742 | if (value == ATTR__UNKNOWN) |
743 | value = ATTR__UNSET; | |
744 | check[i].value = value; | |
745 | } | |
f48fd688 | 746 | |
d0bfd026 JH |
747 | return 0; |
748 | } | |
06f33c17 | 749 | |
ee548df3 MH |
750 | int git_all_attrs(const char *path, int *num, struct git_attr_check **check) |
751 | { | |
752 | int i, count, j; | |
753 | ||
754 | collect_all_attrs(path); | |
755 | ||
756 | /* Count the number of attributes that are set. */ | |
757 | count = 0; | |
758 | for (i = 0; i < attr_nr; i++) { | |
759 | const char *value = check_all_attr[i].value; | |
760 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) | |
761 | ++count; | |
762 | } | |
763 | *num = count; | |
764 | *check = xmalloc(sizeof(**check) * count); | |
765 | j = 0; | |
766 | for (i = 0; i < attr_nr; i++) { | |
767 | const char *value = check_all_attr[i].value; | |
768 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) { | |
769 | (*check)[j].attr = check_all_attr[i].attr; | |
770 | (*check)[j].value = value; | |
771 | ++j; | |
772 | } | |
773 | } | |
774 | ||
775 | return 0; | |
776 | } | |
777 | ||
06f33c17 JH |
778 | void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate) |
779 | { | |
780 | enum git_attr_direction old = direction; | |
4191e80a NTND |
781 | |
782 | if (is_bare_repository() && new != GIT_ATTR_INDEX) | |
783 | die("BUG: non-INDEX attr direction in a bare repo"); | |
784 | ||
06f33c17 JH |
785 | direction = new; |
786 | if (new != old) | |
787 | drop_attr_stack(); | |
788 | use_index = istate; | |
789 | } |