]>
Commit | Line | Data |
---|---|---|
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 | ||
10 | #define NO_THE_INDEX_COMPATIBILITY_MACROS | |
11 | #include "cache.h" | |
12 | #include "exec_cmd.h" | |
13 | #include "attr.h" | |
14 | #include "dir.h" | |
15 | #include "utf8.h" | |
16 | #include "quote.h" | |
17 | ||
18 | const char git_attr__true[] = "(builtin)true"; | |
19 | const char git_attr__false[] = "\0(builtin)false"; | |
20 | static const char git_attr__unknown[] = "(builtin)unknown"; | |
21 | #define ATTR__TRUE git_attr__true | |
22 | #define ATTR__FALSE git_attr__false | |
23 | #define ATTR__UNSET NULL | |
24 | #define ATTR__UNKNOWN git_attr__unknown | |
25 | ||
26 | /* This is a randomly chosen prime. */ | |
27 | #define HASHSIZE 257 | |
28 | ||
29 | #ifndef DEBUG_ATTR | |
30 | #define DEBUG_ATTR 0 | |
31 | #endif | |
32 | ||
33 | struct git_attr { | |
34 | struct git_attr *next; | |
35 | unsigned h; | |
36 | int attr_nr; | |
37 | int maybe_macro; | |
38 | int maybe_real; | |
39 | char name[FLEX_ARRAY]; | |
40 | }; | |
41 | static int attr_nr; | |
42 | static int cannot_trust_maybe_real; | |
43 | ||
44 | static struct git_attr_check *check_all_attr; | |
45 | static struct git_attr *(git_attr_hash[HASHSIZE]); | |
46 | ||
47 | const char *git_attr_name(const struct git_attr *attr) | |
48 | { | |
49 | return attr->name; | |
50 | } | |
51 | ||
52 | static unsigned hash_name(const char *name, int namelen) | |
53 | { | |
54 | unsigned val = 0, c; | |
55 | ||
56 | while (namelen--) { | |
57 | c = *name++; | |
58 | val = ((val << 7) | (val >> 22)) ^ c; | |
59 | } | |
60 | return val; | |
61 | } | |
62 | ||
63 | static int invalid_attr_name(const char *name, int namelen) | |
64 | { | |
65 | /* | |
66 | * Attribute name cannot begin with '-' and must consist of | |
67 | * characters from [-A-Za-z0-9_.]. | |
68 | */ | |
69 | if (namelen <= 0 || *name == '-') | |
70 | return -1; | |
71 | while (namelen--) { | |
72 | char ch = *name++; | |
73 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
74 | ('0' <= ch && ch <= '9') || | |
75 | ('a' <= ch && ch <= 'z') || | |
76 | ('A' <= ch && ch <= 'Z')) ) | |
77 | return -1; | |
78 | } | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static struct git_attr *git_attr_internal(const char *name, int len) | |
83 | { | |
84 | unsigned hval = hash_name(name, len); | |
85 | unsigned pos = hval % HASHSIZE; | |
86 | struct git_attr *a; | |
87 | ||
88 | for (a = git_attr_hash[pos]; a; a = a->next) { | |
89 | if (a->h == hval && | |
90 | !memcmp(a->name, name, len) && !a->name[len]) | |
91 | return a; | |
92 | } | |
93 | ||
94 | if (invalid_attr_name(name, len)) | |
95 | return NULL; | |
96 | ||
97 | FLEX_ALLOC_MEM(a, name, name, len); | |
98 | a->h = hval; | |
99 | a->next = git_attr_hash[pos]; | |
100 | a->attr_nr = attr_nr++; | |
101 | a->maybe_macro = 0; | |
102 | a->maybe_real = 0; | |
103 | git_attr_hash[pos] = a; | |
104 | ||
105 | REALLOC_ARRAY(check_all_attr, attr_nr); | |
106 | check_all_attr[a->attr_nr].attr = a; | |
107 | check_all_attr[a->attr_nr].value = ATTR__UNKNOWN; | |
108 | return a; | |
109 | } | |
110 | ||
111 | struct git_attr *git_attr(const char *name) | |
112 | { | |
113 | return git_attr_internal(name, strlen(name)); | |
114 | } | |
115 | ||
116 | /* What does a matched pattern decide? */ | |
117 | struct attr_state { | |
118 | struct git_attr *attr; | |
119 | const char *setto; | |
120 | }; | |
121 | ||
122 | struct pattern { | |
123 | const char *pattern; | |
124 | int patternlen; | |
125 | int nowildcardlen; | |
126 | unsigned flags; /* EXC_FLAG_* */ | |
127 | }; | |
128 | ||
129 | /* | |
130 | * One rule, as from a .gitattributes file. | |
131 | * | |
132 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
133 | * defined. | |
134 | * | |
135 | * If is_macro is false, then u.pat is the filename pattern to which the | |
136 | * rule applies. | |
137 | * | |
138 | * In either case, num_attr is the number of attributes affected by | |
139 | * this rule, and state is an array listing them. The attributes are | |
140 | * listed as they appear in the file (macros unexpanded). | |
141 | */ | |
142 | struct match_attr { | |
143 | union { | |
144 | struct pattern pat; | |
145 | struct git_attr *attr; | |
146 | } u; | |
147 | char is_macro; | |
148 | unsigned num_attr; | |
149 | struct attr_state state[FLEX_ARRAY]; | |
150 | }; | |
151 | ||
152 | static const char blank[] = " \t\r\n"; | |
153 | ||
154 | /* | |
155 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
156 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
157 | * If e is not NULL, write the results to *e. Return a pointer to the | |
158 | * remainder of the string (with leading whitespace removed), or NULL | |
159 | * if there was an error. | |
160 | */ | |
161 | static const char *parse_attr(const char *src, int lineno, const char *cp, | |
162 | struct attr_state *e) | |
163 | { | |
164 | const char *ep, *equals; | |
165 | int len; | |
166 | ||
167 | ep = cp + strcspn(cp, blank); | |
168 | equals = strchr(cp, '='); | |
169 | if (equals && ep < equals) | |
170 | equals = NULL; | |
171 | if (equals) | |
172 | len = equals - cp; | |
173 | else | |
174 | len = ep - cp; | |
175 | if (!e) { | |
176 | if (*cp == '-' || *cp == '!') { | |
177 | cp++; | |
178 | len--; | |
179 | } | |
180 | if (invalid_attr_name(cp, len)) { | |
181 | fprintf(stderr, | |
182 | "%.*s is not a valid attribute name: %s:%d\n", | |
183 | len, cp, src, lineno); | |
184 | return NULL; | |
185 | } | |
186 | } else { | |
187 | /* | |
188 | * As this function is always called twice, once with | |
189 | * e == NULL in the first pass and then e != NULL in | |
190 | * the second pass, no need for invalid_attr_name() | |
191 | * check here. | |
192 | */ | |
193 | if (*cp == '-' || *cp == '!') { | |
194 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
195 | cp++; | |
196 | len--; | |
197 | } | |
198 | else if (!equals) | |
199 | e->setto = ATTR__TRUE; | |
200 | else { | |
201 | e->setto = xmemdupz(equals + 1, ep - equals - 1); | |
202 | } | |
203 | e->attr = git_attr_internal(cp, len); | |
204 | } | |
205 | return ep + strspn(ep, blank); | |
206 | } | |
207 | ||
208 | static struct match_attr *parse_attr_line(const char *line, const char *src, | |
209 | int lineno, int macro_ok) | |
210 | { | |
211 | int namelen; | |
212 | int num_attr, i; | |
213 | const char *cp, *name, *states; | |
214 | struct match_attr *res = NULL; | |
215 | int is_macro; | |
216 | struct strbuf pattern = STRBUF_INIT; | |
217 | ||
218 | cp = line + strspn(line, blank); | |
219 | if (!*cp || *cp == '#') | |
220 | return NULL; | |
221 | name = cp; | |
222 | ||
223 | if (*cp == '"' && !unquote_c_style(&pattern, name, &states)) { | |
224 | name = pattern.buf; | |
225 | namelen = pattern.len; | |
226 | } else { | |
227 | namelen = strcspn(name, blank); | |
228 | states = name + namelen; | |
229 | } | |
230 | ||
231 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && | |
232 | starts_with(name, ATTRIBUTE_MACRO_PREFIX)) { | |
233 | if (!macro_ok) { | |
234 | fprintf(stderr, "%s not allowed: %s:%d\n", | |
235 | name, src, lineno); | |
236 | goto fail_return; | |
237 | } | |
238 | is_macro = 1; | |
239 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
240 | name += strspn(name, blank); | |
241 | namelen = strcspn(name, blank); | |
242 | if (invalid_attr_name(name, namelen)) { | |
243 | fprintf(stderr, | |
244 | "%.*s is not a valid attribute name: %s:%d\n", | |
245 | namelen, name, src, lineno); | |
246 | goto fail_return; | |
247 | } | |
248 | } | |
249 | else | |
250 | is_macro = 0; | |
251 | ||
252 | states += strspn(states, blank); | |
253 | ||
254 | /* First pass to count the attr_states */ | |
255 | for (cp = states, num_attr = 0; *cp; num_attr++) { | |
256 | cp = parse_attr(src, lineno, cp, NULL); | |
257 | if (!cp) | |
258 | goto fail_return; | |
259 | } | |
260 | ||
261 | res = xcalloc(1, | |
262 | sizeof(*res) + | |
263 | sizeof(struct attr_state) * num_attr + | |
264 | (is_macro ? 0 : namelen + 1)); | |
265 | if (is_macro) { | |
266 | res->u.attr = git_attr_internal(name, namelen); | |
267 | res->u.attr->maybe_macro = 1; | |
268 | } else { | |
269 | char *p = (char *)&(res->state[num_attr]); | |
270 | memcpy(p, name, namelen); | |
271 | res->u.pat.pattern = p; | |
272 | parse_exclude_pattern(&res->u.pat.pattern, | |
273 | &res->u.pat.patternlen, | |
274 | &res->u.pat.flags, | |
275 | &res->u.pat.nowildcardlen); | |
276 | if (res->u.pat.flags & EXC_FLAG_NEGATIVE) { | |
277 | warning(_("Negative patterns are ignored in git attributes\n" | |
278 | "Use '\\!' for literal leading exclamation.")); | |
279 | goto fail_return; | |
280 | } | |
281 | } | |
282 | res->is_macro = is_macro; | |
283 | res->num_attr = num_attr; | |
284 | ||
285 | /* Second pass to fill the attr_states */ | |
286 | for (cp = states, i = 0; *cp; i++) { | |
287 | cp = parse_attr(src, lineno, cp, &(res->state[i])); | |
288 | if (!is_macro) | |
289 | res->state[i].attr->maybe_real = 1; | |
290 | if (res->state[i].attr->maybe_macro) | |
291 | cannot_trust_maybe_real = 1; | |
292 | } | |
293 | ||
294 | strbuf_release(&pattern); | |
295 | return res; | |
296 | ||
297 | fail_return: | |
298 | strbuf_release(&pattern); | |
299 | free(res); | |
300 | return NULL; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Like info/exclude and .gitignore, the attribute information can | |
305 | * come from many places. | |
306 | * | |
307 | * (1) .gitattribute file of the same directory; | |
308 | * (2) .gitattribute file of the parent directory if (1) does not have | |
309 | * any match; this goes recursively upwards, just like .gitignore. | |
310 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
311 | * | |
312 | * In the same file, later entries override the earlier match, so in the | |
313 | * global list, we would have entries from info/attributes the earliest | |
314 | * (reading the file from top to bottom), .gitattribute of the root | |
315 | * directory (again, reading the file from top to bottom) down to the | |
316 | * current directory, and then scan the list backwards to find the first match. | |
317 | * This is exactly the same as what is_excluded() does in dir.c to deal with | |
318 | * .gitignore file and info/excludes file as a fallback. | |
319 | */ | |
320 | ||
321 | static struct attr_stack { | |
322 | struct attr_stack *prev; | |
323 | char *origin; | |
324 | size_t originlen; | |
325 | unsigned num_matches; | |
326 | unsigned alloc; | |
327 | struct match_attr **attrs; | |
328 | } *attr_stack; | |
329 | ||
330 | static void free_attr_elem(struct attr_stack *e) | |
331 | { | |
332 | int i; | |
333 | free(e->origin); | |
334 | for (i = 0; i < e->num_matches; i++) { | |
335 | struct match_attr *a = e->attrs[i]; | |
336 | int j; | |
337 | for (j = 0; j < a->num_attr; j++) { | |
338 | const char *setto = a->state[j].setto; | |
339 | if (setto == ATTR__TRUE || | |
340 | setto == ATTR__FALSE || | |
341 | setto == ATTR__UNSET || | |
342 | setto == ATTR__UNKNOWN) | |
343 | ; | |
344 | else | |
345 | free((char *) setto); | |
346 | } | |
347 | free(a); | |
348 | } | |
349 | free(e->attrs); | |
350 | free(e); | |
351 | } | |
352 | ||
353 | static const char *builtin_attr[] = { | |
354 | "[attr]binary -diff -merge -text", | |
355 | NULL, | |
356 | }; | |
357 | ||
358 | static void handle_attr_line(struct attr_stack *res, | |
359 | const char *line, | |
360 | const char *src, | |
361 | int lineno, | |
362 | int macro_ok) | |
363 | { | |
364 | struct match_attr *a; | |
365 | ||
366 | a = parse_attr_line(line, src, lineno, macro_ok); | |
367 | if (!a) | |
368 | return; | |
369 | ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc); | |
370 | res->attrs[res->num_matches++] = a; | |
371 | } | |
372 | ||
373 | static struct attr_stack *read_attr_from_array(const char **list) | |
374 | { | |
375 | struct attr_stack *res; | |
376 | const char *line; | |
377 | int lineno = 0; | |
378 | ||
379 | res = xcalloc(1, sizeof(*res)); | |
380 | while ((line = *(list++)) != NULL) | |
381 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
382 | return res; | |
383 | } | |
384 | ||
385 | static enum git_attr_direction direction; | |
386 | static struct index_state *use_index; | |
387 | ||
388 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) | |
389 | { | |
390 | FILE *fp = fopen(path, "r"); | |
391 | struct attr_stack *res; | |
392 | char buf[2048]; | |
393 | int lineno = 0; | |
394 | ||
395 | if (!fp) { | |
396 | if (errno != ENOENT && errno != ENOTDIR) | |
397 | warn_on_inaccessible(path); | |
398 | return NULL; | |
399 | } | |
400 | res = xcalloc(1, sizeof(*res)); | |
401 | while (fgets(buf, sizeof(buf), fp)) { | |
402 | char *bufp = buf; | |
403 | if (!lineno) | |
404 | skip_utf8_bom(&bufp, strlen(bufp)); | |
405 | handle_attr_line(res, bufp, path, ++lineno, macro_ok); | |
406 | } | |
407 | fclose(fp); | |
408 | return res; | |
409 | } | |
410 | ||
411 | static struct attr_stack *read_attr_from_index(const char *path, int macro_ok) | |
412 | { | |
413 | struct attr_stack *res; | |
414 | char *buf, *sp; | |
415 | int lineno = 0; | |
416 | ||
417 | buf = read_blob_data_from_index(use_index ? use_index : &the_index, path, NULL); | |
418 | if (!buf) | |
419 | return NULL; | |
420 | ||
421 | res = xcalloc(1, sizeof(*res)); | |
422 | for (sp = buf; *sp; ) { | |
423 | char *ep; | |
424 | int more; | |
425 | ||
426 | ep = strchrnul(sp, '\n'); | |
427 | more = (*ep == '\n'); | |
428 | *ep = '\0'; | |
429 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
430 | sp = ep + more; | |
431 | } | |
432 | free(buf); | |
433 | return res; | |
434 | } | |
435 | ||
436 | static struct attr_stack *read_attr(const char *path, int macro_ok) | |
437 | { | |
438 | struct attr_stack *res; | |
439 | ||
440 | if (direction == GIT_ATTR_CHECKOUT) { | |
441 | res = read_attr_from_index(path, macro_ok); | |
442 | if (!res) | |
443 | res = read_attr_from_file(path, macro_ok); | |
444 | } | |
445 | else if (direction == GIT_ATTR_CHECKIN) { | |
446 | res = read_attr_from_file(path, macro_ok); | |
447 | if (!res) | |
448 | /* | |
449 | * There is no checked out .gitattributes file there, but | |
450 | * we might have it in the index. We allow operation in a | |
451 | * sparsely checked out work tree, so read from it. | |
452 | */ | |
453 | res = read_attr_from_index(path, macro_ok); | |
454 | } | |
455 | else | |
456 | res = read_attr_from_index(path, macro_ok); | |
457 | if (!res) | |
458 | res = xcalloc(1, sizeof(*res)); | |
459 | return res; | |
460 | } | |
461 | ||
462 | #if DEBUG_ATTR | |
463 | static void debug_info(const char *what, struct attr_stack *elem) | |
464 | { | |
465 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
466 | } | |
467 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) | |
468 | { | |
469 | const char *value = v; | |
470 | ||
471 | if (ATTR_TRUE(value)) | |
472 | value = "set"; | |
473 | else if (ATTR_FALSE(value)) | |
474 | value = "unset"; | |
475 | else if (ATTR_UNSET(value)) | |
476 | value = "unspecified"; | |
477 | ||
478 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
479 | what, attr->name, (char *) value, match); | |
480 | } | |
481 | #define debug_push(a) debug_info("push", (a)) | |
482 | #define debug_pop(a) debug_info("pop", (a)) | |
483 | #else | |
484 | #define debug_push(a) do { ; } while (0) | |
485 | #define debug_pop(a) do { ; } while (0) | |
486 | #define debug_set(a,b,c,d) do { ; } while (0) | |
487 | #endif /* DEBUG_ATTR */ | |
488 | ||
489 | static void drop_attr_stack(void) | |
490 | { | |
491 | while (attr_stack) { | |
492 | struct attr_stack *elem = attr_stack; | |
493 | attr_stack = elem->prev; | |
494 | free_attr_elem(elem); | |
495 | } | |
496 | } | |
497 | ||
498 | static const char *git_etc_gitattributes(void) | |
499 | { | |
500 | static const char *system_wide; | |
501 | if (!system_wide) | |
502 | system_wide = system_path(ETC_GITATTRIBUTES); | |
503 | return system_wide; | |
504 | } | |
505 | ||
506 | static int git_attr_system(void) | |
507 | { | |
508 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
509 | } | |
510 | ||
511 | static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE) | |
512 | ||
513 | static void push_stack(struct attr_stack **attr_stack_p, | |
514 | struct attr_stack *elem, char *origin, size_t originlen) | |
515 | { | |
516 | if (elem) { | |
517 | elem->origin = origin; | |
518 | if (origin) | |
519 | elem->originlen = originlen; | |
520 | elem->prev = *attr_stack_p; | |
521 | *attr_stack_p = elem; | |
522 | } | |
523 | } | |
524 | ||
525 | static void bootstrap_attr_stack(void) | |
526 | { | |
527 | struct attr_stack *elem; | |
528 | ||
529 | if (attr_stack) | |
530 | return; | |
531 | ||
532 | push_stack(&attr_stack, read_attr_from_array(builtin_attr), NULL, 0); | |
533 | ||
534 | if (git_attr_system()) | |
535 | push_stack(&attr_stack, | |
536 | read_attr_from_file(git_etc_gitattributes(), 1), | |
537 | NULL, 0); | |
538 | ||
539 | if (!git_attributes_file) | |
540 | git_attributes_file = xdg_config_home("attributes"); | |
541 | if (git_attributes_file) | |
542 | push_stack(&attr_stack, | |
543 | read_attr_from_file(git_attributes_file, 1), | |
544 | NULL, 0); | |
545 | ||
546 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { | |
547 | elem = read_attr(GITATTRIBUTES_FILE, 1); | |
548 | push_stack(&attr_stack, elem, xstrdup(""), 0); | |
549 | debug_push(elem); | |
550 | } | |
551 | ||
552 | if (startup_info->have_repository) | |
553 | elem = read_attr_from_file(git_path_info_attributes(), 1); | |
554 | else | |
555 | elem = NULL; | |
556 | ||
557 | if (!elem) | |
558 | elem = xcalloc(1, sizeof(*elem)); | |
559 | push_stack(&attr_stack, elem, NULL, 0); | |
560 | } | |
561 | ||
562 | static void prepare_attr_stack(const char *path, int dirlen) | |
563 | { | |
564 | struct attr_stack *elem, *info; | |
565 | const char *cp; | |
566 | ||
567 | /* | |
568 | * At the bottom of the attribute stack is the built-in | |
569 | * set of attribute definitions, followed by the contents | |
570 | * of $(prefix)/etc/gitattributes and a file specified by | |
571 | * core.attributesfile. Then, contents from | |
572 | * .gitattribute files from directories closer to the | |
573 | * root to the ones in deeper directories are pushed | |
574 | * to the stack. Finally, at the very top of the stack | |
575 | * we always keep the contents of $GIT_DIR/info/attributes. | |
576 | * | |
577 | * When checking, we use entries from near the top of the | |
578 | * stack, preferring $GIT_DIR/info/attributes, then | |
579 | * .gitattributes in deeper directories to shallower ones, | |
580 | * and finally use the built-in set as the default. | |
581 | */ | |
582 | bootstrap_attr_stack(); | |
583 | ||
584 | /* | |
585 | * Pop the "info" one that is always at the top of the stack. | |
586 | */ | |
587 | info = attr_stack; | |
588 | attr_stack = info->prev; | |
589 | ||
590 | /* | |
591 | * Pop the ones from directories that are not the prefix of | |
592 | * the path we are checking. Break out of the loop when we see | |
593 | * the root one (whose origin is an empty string "") or the builtin | |
594 | * one (whose origin is NULL) without popping it. | |
595 | */ | |
596 | while (attr_stack->origin) { | |
597 | int namelen = strlen(attr_stack->origin); | |
598 | ||
599 | elem = attr_stack; | |
600 | if (namelen <= dirlen && | |
601 | !strncmp(elem->origin, path, namelen) && | |
602 | (!namelen || path[namelen] == '/')) | |
603 | break; | |
604 | ||
605 | debug_pop(elem); | |
606 | attr_stack = elem->prev; | |
607 | free_attr_elem(elem); | |
608 | } | |
609 | ||
610 | /* | |
611 | * Read from parent directories and push them down | |
612 | */ | |
613 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { | |
614 | /* | |
615 | * bootstrap_attr_stack() should have added, and the | |
616 | * above loop should have stopped before popping, the | |
617 | * root element whose attr_stack->origin is set to an | |
618 | * empty string. | |
619 | */ | |
620 | struct strbuf pathbuf = STRBUF_INIT; | |
621 | ||
622 | assert(attr_stack->origin); | |
623 | while (1) { | |
624 | size_t len = strlen(attr_stack->origin); | |
625 | char *origin; | |
626 | ||
627 | if (dirlen <= len) | |
628 | break; | |
629 | cp = memchr(path + len + 1, '/', dirlen - len - 1); | |
630 | if (!cp) | |
631 | cp = path + dirlen; | |
632 | strbuf_addf(&pathbuf, | |
633 | "%.*s/%s", (int)(cp - path), path, | |
634 | GITATTRIBUTES_FILE); | |
635 | elem = read_attr(pathbuf.buf, 0); | |
636 | strbuf_setlen(&pathbuf, cp - path); | |
637 | origin = strbuf_detach(&pathbuf, &len); | |
638 | push_stack(&attr_stack, elem, origin, len); | |
639 | debug_push(elem); | |
640 | } | |
641 | ||
642 | strbuf_release(&pathbuf); | |
643 | } | |
644 | ||
645 | /* | |
646 | * Finally push the "info" one at the top of the stack. | |
647 | */ | |
648 | push_stack(&attr_stack, info, NULL, 0); | |
649 | } | |
650 | ||
651 | static int path_matches(const char *pathname, int pathlen, | |
652 | int basename_offset, | |
653 | const struct pattern *pat, | |
654 | const char *base, int baselen) | |
655 | { | |
656 | const char *pattern = pat->pattern; | |
657 | int prefix = pat->nowildcardlen; | |
658 | int isdir = (pathlen && pathname[pathlen - 1] == '/'); | |
659 | ||
660 | if ((pat->flags & EXC_FLAG_MUSTBEDIR) && !isdir) | |
661 | return 0; | |
662 | ||
663 | if (pat->flags & EXC_FLAG_NODIR) { | |
664 | return match_basename(pathname + basename_offset, | |
665 | pathlen - basename_offset - isdir, | |
666 | pattern, prefix, | |
667 | pat->patternlen, pat->flags); | |
668 | } | |
669 | return match_pathname(pathname, pathlen - isdir, | |
670 | base, baselen, | |
671 | pattern, prefix, pat->patternlen, pat->flags); | |
672 | } | |
673 | ||
674 | static int macroexpand_one(int attr_nr, int rem); | |
675 | ||
676 | static int fill_one(const char *what, struct match_attr *a, int rem) | |
677 | { | |
678 | struct git_attr_check *check = check_all_attr; | |
679 | int i; | |
680 | ||
681 | for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) { | |
682 | struct git_attr *attr = a->state[i].attr; | |
683 | const char **n = &(check[attr->attr_nr].value); | |
684 | const char *v = a->state[i].setto; | |
685 | ||
686 | if (*n == ATTR__UNKNOWN) { | |
687 | debug_set(what, | |
688 | a->is_macro ? a->u.attr->name : a->u.pat.pattern, | |
689 | attr, v); | |
690 | *n = v; | |
691 | rem--; | |
692 | rem = macroexpand_one(attr->attr_nr, rem); | |
693 | } | |
694 | } | |
695 | return rem; | |
696 | } | |
697 | ||
698 | static int fill(const char *path, int pathlen, int basename_offset, | |
699 | struct attr_stack *stk, int rem) | |
700 | { | |
701 | int i; | |
702 | const char *base = stk->origin ? stk->origin : ""; | |
703 | ||
704 | for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) { | |
705 | struct match_attr *a = stk->attrs[i]; | |
706 | if (a->is_macro) | |
707 | continue; | |
708 | if (path_matches(path, pathlen, basename_offset, | |
709 | &a->u.pat, base, stk->originlen)) | |
710 | rem = fill_one("fill", a, rem); | |
711 | } | |
712 | return rem; | |
713 | } | |
714 | ||
715 | static int macroexpand_one(int nr, int rem) | |
716 | { | |
717 | struct attr_stack *stk; | |
718 | int i; | |
719 | ||
720 | if (check_all_attr[nr].value != ATTR__TRUE || | |
721 | !check_all_attr[nr].attr->maybe_macro) | |
722 | return rem; | |
723 | ||
724 | for (stk = attr_stack; stk; stk = stk->prev) { | |
725 | for (i = stk->num_matches - 1; 0 <= i; i--) { | |
726 | struct match_attr *ma = stk->attrs[i]; | |
727 | if (!ma->is_macro) | |
728 | continue; | |
729 | if (ma->u.attr->attr_nr == nr) | |
730 | return fill_one("expand", ma, rem); | |
731 | } | |
732 | } | |
733 | ||
734 | return rem; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Collect attributes for path into the array pointed to by | |
739 | * check_all_attr. If num is non-zero, only attributes in check[] are | |
740 | * collected. Otherwise all attributes are collected. | |
741 | */ | |
742 | static void collect_some_attrs(const char *path, int num, | |
743 | struct git_attr_check *check) | |
744 | ||
745 | { | |
746 | struct attr_stack *stk; | |
747 | int i, pathlen, rem, dirlen; | |
748 | const char *cp, *last_slash = NULL; | |
749 | int basename_offset; | |
750 | ||
751 | for (cp = path; *cp; cp++) { | |
752 | if (*cp == '/' && cp[1]) | |
753 | last_slash = cp; | |
754 | } | |
755 | pathlen = cp - path; | |
756 | if (last_slash) { | |
757 | basename_offset = last_slash + 1 - path; | |
758 | dirlen = last_slash - path; | |
759 | } else { | |
760 | basename_offset = 0; | |
761 | dirlen = 0; | |
762 | } | |
763 | ||
764 | prepare_attr_stack(path, dirlen); | |
765 | for (i = 0; i < attr_nr; i++) | |
766 | check_all_attr[i].value = ATTR__UNKNOWN; | |
767 | if (num && !cannot_trust_maybe_real) { | |
768 | rem = 0; | |
769 | for (i = 0; i < num; i++) { | |
770 | if (!check[i].attr->maybe_real) { | |
771 | struct git_attr_check *c; | |
772 | c = check_all_attr + check[i].attr->attr_nr; | |
773 | c->value = ATTR__UNSET; | |
774 | rem++; | |
775 | } | |
776 | } | |
777 | if (rem == num) | |
778 | return; | |
779 | } | |
780 | ||
781 | rem = attr_nr; | |
782 | for (stk = attr_stack; 0 < rem && stk; stk = stk->prev) | |
783 | rem = fill(path, pathlen, basename_offset, stk, rem); | |
784 | } | |
785 | ||
786 | int git_check_attr(const char *path, int num, struct git_attr_check *check) | |
787 | { | |
788 | int i; | |
789 | ||
790 | collect_some_attrs(path, num, check); | |
791 | ||
792 | for (i = 0; i < num; i++) { | |
793 | const char *value = check_all_attr[check[i].attr->attr_nr].value; | |
794 | if (value == ATTR__UNKNOWN) | |
795 | value = ATTR__UNSET; | |
796 | check[i].value = value; | |
797 | } | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
802 | int git_all_attrs(const char *path, int *num, struct git_attr_check **check) | |
803 | { | |
804 | int i, count, j; | |
805 | ||
806 | collect_some_attrs(path, 0, NULL); | |
807 | ||
808 | /* Count the number of attributes that are set. */ | |
809 | count = 0; | |
810 | for (i = 0; i < attr_nr; i++) { | |
811 | const char *value = check_all_attr[i].value; | |
812 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) | |
813 | ++count; | |
814 | } | |
815 | *num = count; | |
816 | ALLOC_ARRAY(*check, count); | |
817 | j = 0; | |
818 | for (i = 0; i < attr_nr; i++) { | |
819 | const char *value = check_all_attr[i].value; | |
820 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) { | |
821 | (*check)[j].attr = check_all_attr[i].attr; | |
822 | (*check)[j].value = value; | |
823 | ++j; | |
824 | } | |
825 | } | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate) | |
831 | { | |
832 | enum git_attr_direction old = direction; | |
833 | ||
834 | if (is_bare_repository() && new != GIT_ATTR_INDEX) | |
835 | die("BUG: non-INDEX attr direction in a bare repo"); | |
836 | ||
837 | direction = new; | |
838 | if (new != old) | |
839 | drop_attr_stack(); | |
840 | use_index = istate; | |
841 | } |