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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 | |
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 | ||
43 | static unsigned hash_name(const char *name, int namelen) | |
44 | { | |
48fb7deb | 45 | unsigned val = 0, c; |
d0bfd026 JH |
46 | |
47 | while (namelen--) { | |
48 | c = *name++; | |
49 | val = ((val << 7) | (val >> 22)) ^ c; | |
50 | } | |
51 | return val; | |
52 | } | |
53 | ||
e4aee10a JH |
54 | static int invalid_attr_name(const char *name, int namelen) |
55 | { | |
56 | /* | |
57 | * Attribute name cannot begin with '-' and from | |
58 | * [-A-Za-z0-9_.]. We'd specifically exclude '=' for now, | |
59 | * as we might later want to allow non-binary value for | |
60 | * attributes, e.g. "*.svg merge=special-merge-program-for-svg" | |
61 | */ | |
62 | if (*name == '-') | |
63 | return -1; | |
64 | while (namelen--) { | |
65 | char ch = *name++; | |
66 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
67 | ('0' <= ch && ch <= '9') || | |
68 | ('a' <= ch && ch <= 'z') || | |
69 | ('A' <= ch && ch <= 'Z')) ) | |
70 | return -1; | |
71 | } | |
72 | return 0; | |
73 | } | |
74 | ||
7fb0eaa2 | 75 | static struct git_attr *git_attr_internal(const char *name, int len) |
d0bfd026 JH |
76 | { |
77 | unsigned hval = hash_name(name, len); | |
78 | unsigned pos = hval % HASHSIZE; | |
79 | struct git_attr *a; | |
80 | ||
81 | for (a = git_attr_hash[pos]; a; a = a->next) { | |
82 | if (a->h == hval && | |
83 | !memcmp(a->name, name, len) && !a->name[len]) | |
84 | return a; | |
85 | } | |
86 | ||
e4aee10a JH |
87 | if (invalid_attr_name(name, len)) |
88 | return NULL; | |
89 | ||
d0bfd026 JH |
90 | a = xmalloc(sizeof(*a) + len + 1); |
91 | memcpy(a->name, name, len); | |
92 | a->name[len] = 0; | |
93 | a->h = hval; | |
94 | a->next = git_attr_hash[pos]; | |
f48fd688 | 95 | a->attr_nr = attr_nr++; |
d0bfd026 | 96 | git_attr_hash[pos] = a; |
f48fd688 JH |
97 | |
98 | check_all_attr = xrealloc(check_all_attr, | |
99 | sizeof(*check_all_attr) * attr_nr); | |
100 | check_all_attr[a->attr_nr].attr = a; | |
515106fa | 101 | check_all_attr[a->attr_nr].value = ATTR__UNKNOWN; |
d0bfd026 JH |
102 | return a; |
103 | } | |
104 | ||
7fb0eaa2 JH |
105 | struct git_attr *git_attr(const char *name) |
106 | { | |
107 | return git_attr_internal(name, strlen(name)); | |
108 | } | |
109 | ||
515106fa | 110 | /* What does a matched pattern decide? */ |
d0bfd026 | 111 | struct attr_state { |
d0bfd026 | 112 | struct git_attr *attr; |
a5e92abd | 113 | const char *setto; |
d0bfd026 JH |
114 | }; |
115 | ||
ba845b75 MH |
116 | /* |
117 | * One rule, as from a .gitattributes file. | |
118 | * | |
119 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
120 | * defined. | |
121 | * | |
122 | * If is_macro is false, then u.pattern points at the filename pattern | |
123 | * to which the rule applies. (The memory pointed to is part of the | |
124 | * memory block allocated for the match_attr instance.) | |
125 | * | |
126 | * In either case, num_attr is the number of attributes affected by | |
127 | * this rule, and state is an array listing them. The attributes are | |
128 | * listed as they appear in the file (macros unexpanded). | |
129 | */ | |
d0bfd026 | 130 | struct match_attr { |
f48fd688 JH |
131 | union { |
132 | char *pattern; | |
133 | struct git_attr *attr; | |
134 | } u; | |
135 | char is_macro; | |
d0bfd026 JH |
136 | unsigned num_attr; |
137 | struct attr_state state[FLEX_ARRAY]; | |
138 | }; | |
139 | ||
140 | static const char blank[] = " \t\r\n"; | |
141 | ||
d1751298 MH |
142 | /* |
143 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
144 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
145 | * If e is not NULL, write the results to *e. Return a pointer to the | |
146 | * remainder of the string (with leading whitespace removed), or NULL | |
147 | * if there was an error. | |
148 | */ | |
515106fa | 149 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
d1751298 | 150 | struct attr_state *e) |
515106fa JH |
151 | { |
152 | const char *ep, *equals; | |
153 | int len; | |
154 | ||
155 | ep = cp + strcspn(cp, blank); | |
156 | equals = strchr(cp, '='); | |
157 | if (equals && ep < equals) | |
158 | equals = NULL; | |
159 | if (equals) | |
160 | len = equals - cp; | |
161 | else | |
162 | len = ep - cp; | |
d1751298 | 163 | if (!e) { |
515106fa JH |
164 | if (*cp == '-' || *cp == '!') { |
165 | cp++; | |
166 | len--; | |
167 | } | |
168 | if (invalid_attr_name(cp, len)) { | |
169 | fprintf(stderr, | |
170 | "%.*s is not a valid attribute name: %s:%d\n", | |
171 | len, cp, src, lineno); | |
172 | return NULL; | |
173 | } | |
174 | } else { | |
515106fa JH |
175 | if (*cp == '-' || *cp == '!') { |
176 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
177 | cp++; | |
178 | len--; | |
179 | } | |
180 | else if (!equals) | |
181 | e->setto = ATTR__TRUE; | |
182 | else { | |
182af834 | 183 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 184 | } |
7fb0eaa2 | 185 | e->attr = git_attr_internal(cp, len); |
515106fa | 186 | } |
515106fa JH |
187 | return ep + strspn(ep, blank); |
188 | } | |
189 | ||
f48fd688 JH |
190 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
191 | int lineno, int macro_ok) | |
d0bfd026 JH |
192 | { |
193 | int namelen; | |
194 | int num_attr; | |
195 | const char *cp, *name; | |
515106fa | 196 | struct match_attr *res = NULL; |
d0bfd026 | 197 | int pass; |
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 JH |
225 | |
226 | for (pass = 0; pass < 2; pass++) { | |
227 | /* pass 0 counts and allocates, pass 1 fills */ | |
228 | num_attr = 0; | |
229 | cp = name + namelen; | |
230 | cp = cp + strspn(cp, blank); | |
d7b0a093 | 231 | while (*cp) { |
d1751298 MH |
232 | cp = parse_attr(src, lineno, cp, |
233 | pass ? &(res->state[num_attr]) : NULL); | |
d7b0a093 SP |
234 | if (!cp) |
235 | return NULL; | |
4c7517c9 | 236 | num_attr++; |
d7b0a093 | 237 | } |
d0bfd026 JH |
238 | if (pass) |
239 | break; | |
240 | res = xcalloc(1, | |
241 | sizeof(*res) + | |
242 | sizeof(struct attr_state) * num_attr + | |
f48fd688 | 243 | (is_macro ? 0 : namelen + 1)); |
515106fa | 244 | if (is_macro) |
7fb0eaa2 | 245 | res->u.attr = git_attr_internal(name, namelen); |
f48fd688 | 246 | else { |
4b25d091 | 247 | res->u.pattern = (char *)&(res->state[num_attr]); |
f48fd688 JH |
248 | memcpy(res->u.pattern, name, namelen); |
249 | res->u.pattern[namelen] = 0; | |
250 | } | |
251 | res->is_macro = is_macro; | |
d0bfd026 JH |
252 | res->num_attr = num_attr; |
253 | } | |
254 | return res; | |
255 | } | |
256 | ||
257 | /* | |
258 | * Like info/exclude and .gitignore, the attribute information can | |
259 | * come from many places. | |
260 | * | |
261 | * (1) .gitattribute file of the same directory; | |
515106fa JH |
262 | * (2) .gitattribute file of the parent directory if (1) does not have |
263 | * any match; this goes recursively upwards, just like .gitignore. | |
264 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
265 | * |
266 | * In the same file, later entries override the earlier match, so in the | |
267 | * global list, we would have entries from info/attributes the earliest | |
268 | * (reading the file from top to bottom), .gitattribute of the root | |
269 | * directory (again, reading the file from top to bottom) down to the | |
270 | * current directory, and then scan the list backwards to find the first match. | |
271 | * This is exactly the same as what excluded() does in dir.c to deal with | |
272 | * .gitignore | |
273 | */ | |
274 | ||
275 | static struct attr_stack { | |
276 | struct attr_stack *prev; | |
277 | char *origin; | |
278 | unsigned num_matches; | |
a4413118 | 279 | unsigned alloc; |
d0bfd026 JH |
280 | struct match_attr **attrs; |
281 | } *attr_stack; | |
282 | ||
283 | static void free_attr_elem(struct attr_stack *e) | |
284 | { | |
285 | int i; | |
286 | free(e->origin); | |
515106fa JH |
287 | for (i = 0; i < e->num_matches; i++) { |
288 | struct match_attr *a = e->attrs[i]; | |
289 | int j; | |
290 | for (j = 0; j < a->num_attr; j++) { | |
a5e92abd | 291 | const char *setto = a->state[j].setto; |
515106fa JH |
292 | if (setto == ATTR__TRUE || |
293 | setto == ATTR__FALSE || | |
294 | setto == ATTR__UNSET || | |
295 | setto == ATTR__UNKNOWN) | |
296 | ; | |
297 | else | |
4b25d091 | 298 | free((char *) setto); |
515106fa JH |
299 | } |
300 | free(a); | |
301 | } | |
d0bfd026 JH |
302 | free(e); |
303 | } | |
304 | ||
305 | static const char *builtin_attr[] = { | |
5ec3e670 | 306 | "[attr]binary -diff -text", |
d0bfd026 JH |
307 | NULL, |
308 | }; | |
309 | ||
a4413118 JH |
310 | static void handle_attr_line(struct attr_stack *res, |
311 | const char *line, | |
312 | const char *src, | |
313 | int lineno, | |
314 | int macro_ok) | |
315 | { | |
316 | struct match_attr *a; | |
317 | ||
318 | a = parse_attr_line(line, src, lineno, macro_ok); | |
319 | if (!a) | |
320 | return; | |
321 | if (res->alloc <= res->num_matches) { | |
322 | res->alloc = alloc_nr(res->num_matches); | |
323 | res->attrs = xrealloc(res->attrs, | |
324 | sizeof(struct match_attr *) * | |
325 | res->alloc); | |
326 | } | |
327 | res->attrs[res->num_matches++] = a; | |
328 | } | |
329 | ||
d0bfd026 JH |
330 | static struct attr_stack *read_attr_from_array(const char **list) |
331 | { | |
332 | struct attr_stack *res; | |
333 | const char *line; | |
f48fd688 | 334 | int lineno = 0; |
d0bfd026 JH |
335 | |
336 | res = xcalloc(1, sizeof(*res)); | |
a4413118 JH |
337 | while ((line = *(list++)) != NULL) |
338 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
d0bfd026 JH |
339 | return res; |
340 | } | |
341 | ||
06f33c17 JH |
342 | static enum git_attr_direction direction; |
343 | static struct index_state *use_index; | |
344 | ||
f48fd688 | 345 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) |
d0bfd026 | 346 | { |
a4413118 | 347 | FILE *fp = fopen(path, "r"); |
d0bfd026 JH |
348 | struct attr_stack *res; |
349 | char buf[2048]; | |
f48fd688 | 350 | int lineno = 0; |
d0bfd026 | 351 | |
d0bfd026 | 352 | if (!fp) |
a4413118 JH |
353 | return NULL; |
354 | res = xcalloc(1, sizeof(*res)); | |
355 | while (fgets(buf, sizeof(buf), fp)) | |
356 | handle_attr_line(res, buf, path, ++lineno, macro_ok); | |
357 | fclose(fp); | |
358 | return res; | |
359 | } | |
d0bfd026 | 360 | |
1a9d7e9b JH |
361 | static void *read_index_data(const char *path) |
362 | { | |
363 | int pos, len; | |
364 | unsigned long sz; | |
365 | enum object_type type; | |
366 | void *data; | |
06f33c17 | 367 | struct index_state *istate = use_index ? use_index : &the_index; |
1a9d7e9b JH |
368 | |
369 | len = strlen(path); | |
06f33c17 | 370 | pos = index_name_pos(istate, path, len); |
1a9d7e9b JH |
371 | if (pos < 0) { |
372 | /* | |
373 | * We might be in the middle of a merge, in which | |
374 | * case we would read stage #2 (ours). | |
375 | */ | |
376 | int i; | |
377 | for (i = -pos - 1; | |
06f33c17 JH |
378 | (pos < 0 && i < istate->cache_nr && |
379 | !strcmp(istate->cache[i]->name, path)); | |
1a9d7e9b | 380 | i++) |
06f33c17 | 381 | if (ce_stage(istate->cache[i]) == 2) |
1a9d7e9b JH |
382 | pos = i; |
383 | } | |
384 | if (pos < 0) | |
385 | return NULL; | |
06f33c17 | 386 | data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz); |
1a9d7e9b JH |
387 | if (!data || type != OBJ_BLOB) { |
388 | free(data); | |
389 | return NULL; | |
390 | } | |
391 | return data; | |
392 | } | |
393 | ||
06f33c17 | 394 | static struct attr_stack *read_attr_from_index(const char *path, int macro_ok) |
a4413118 JH |
395 | { |
396 | struct attr_stack *res; | |
1a9d7e9b JH |
397 | char *buf, *sp; |
398 | int lineno = 0; | |
f48fd688 | 399 | |
1a9d7e9b JH |
400 | buf = read_index_data(path); |
401 | if (!buf) | |
06f33c17 | 402 | return NULL; |
1a9d7e9b | 403 | |
06f33c17 | 404 | res = xcalloc(1, sizeof(*res)); |
1a9d7e9b JH |
405 | for (sp = buf; *sp; ) { |
406 | char *ep; | |
407 | int more; | |
408 | for (ep = sp; *ep && *ep != '\n'; ep++) | |
409 | ; | |
410 | more = (*ep == '\n'); | |
411 | *ep = '\0'; | |
412 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
413 | sp = ep + more; | |
414 | } | |
415 | free(buf); | |
d0bfd026 JH |
416 | return res; |
417 | } | |
418 | ||
06f33c17 JH |
419 | static struct attr_stack *read_attr(const char *path, int macro_ok) |
420 | { | |
421 | struct attr_stack *res; | |
422 | ||
423 | if (direction == GIT_ATTR_CHECKOUT) { | |
424 | res = read_attr_from_index(path, macro_ok); | |
425 | if (!res) | |
426 | res = read_attr_from_file(path, macro_ok); | |
427 | } | |
4191e80a | 428 | else if (direction == GIT_ATTR_CHECKIN) { |
06f33c17 JH |
429 | res = read_attr_from_file(path, macro_ok); |
430 | if (!res) | |
431 | /* | |
432 | * There is no checked out .gitattributes file there, but | |
433 | * we might have it in the index. We allow operation in a | |
434 | * sparsely checked out work tree, so read from it. | |
435 | */ | |
436 | res = read_attr_from_index(path, macro_ok); | |
437 | } | |
4191e80a NTND |
438 | else |
439 | res = read_attr_from_index(path, macro_ok); | |
06f33c17 JH |
440 | if (!res) |
441 | res = xcalloc(1, sizeof(*res)); | |
442 | return res; | |
443 | } | |
444 | ||
d0bfd026 JH |
445 | #if DEBUG_ATTR |
446 | static void debug_info(const char *what, struct attr_stack *elem) | |
447 | { | |
448 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
449 | } | |
cf94ccda | 450 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) |
f48fd688 | 451 | { |
515106fa JH |
452 | const char *value = v; |
453 | ||
454 | if (ATTR_TRUE(value)) | |
455 | value = "set"; | |
456 | else if (ATTR_FALSE(value)) | |
457 | value = "unset"; | |
458 | else if (ATTR_UNSET(value)) | |
459 | value = "unspecified"; | |
460 | ||
461 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
462 | what, attr->name, (char *) value, match); | |
f48fd688 | 463 | } |
d0bfd026 JH |
464 | #define debug_push(a) debug_info("push", (a)) |
465 | #define debug_pop(a) debug_info("pop", (a)) | |
466 | #else | |
467 | #define debug_push(a) do { ; } while (0) | |
468 | #define debug_pop(a) do { ; } while (0) | |
f48fd688 | 469 | #define debug_set(a,b,c,d) do { ; } while (0) |
d0bfd026 JH |
470 | #endif |
471 | ||
06f33c17 JH |
472 | static void drop_attr_stack(void) |
473 | { | |
474 | while (attr_stack) { | |
475 | struct attr_stack *elem = attr_stack; | |
476 | attr_stack = elem->prev; | |
477 | free_attr_elem(elem); | |
478 | } | |
479 | } | |
480 | ||
c5147722 | 481 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
482 | { |
483 | static const char *system_wide; | |
484 | if (!system_wide) | |
485 | system_wide = system_path(ETC_GITATTRIBUTES); | |
486 | return system_wide; | |
487 | } | |
488 | ||
c5147722 | 489 | static int git_attr_system(void) |
6df42ab9 PO |
490 | { |
491 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
492 | } | |
493 | ||
6df42ab9 PO |
494 | static int git_attr_config(const char *var, const char *value, void *dummy) |
495 | { | |
496 | if (!strcmp(var, "core.attributesfile")) | |
497 | return git_config_pathname(&attributes_file, var, value); | |
498 | ||
499 | return 0; | |
500 | } | |
501 | ||
f48fd688 JH |
502 | static void bootstrap_attr_stack(void) |
503 | { | |
504 | if (!attr_stack) { | |
505 | struct attr_stack *elem; | |
506 | ||
507 | elem = read_attr_from_array(builtin_attr); | |
508 | elem->origin = NULL; | |
509 | elem->prev = attr_stack; | |
510 | attr_stack = elem; | |
511 | ||
6df42ab9 PO |
512 | if (git_attr_system()) { |
513 | elem = read_attr_from_file(git_etc_gitattributes(), 1); | |
514 | if (elem) { | |
515 | elem->origin = NULL; | |
516 | elem->prev = attr_stack; | |
517 | attr_stack = elem; | |
518 | } | |
519 | } | |
520 | ||
521 | git_config(git_attr_config, NULL); | |
e91b6c50 | 522 | if (attributes_file) { |
6df42ab9 PO |
523 | elem = read_attr_from_file(attributes_file, 1); |
524 | if (elem) { | |
525 | elem->origin = NULL; | |
526 | elem->prev = attr_stack; | |
527 | attr_stack = elem; | |
528 | } | |
529 | } | |
530 | ||
4191e80a | 531 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
2d35d556 RS |
532 | elem = read_attr(GITATTRIBUTES_FILE, 1); |
533 | elem->origin = strdup(""); | |
534 | elem->prev = attr_stack; | |
535 | attr_stack = elem; | |
536 | debug_push(elem); | |
537 | } | |
f48fd688 JH |
538 | |
539 | elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1); | |
a4413118 JH |
540 | if (!elem) |
541 | elem = xcalloc(1, sizeof(*elem)); | |
f48fd688 JH |
542 | elem->origin = NULL; |
543 | elem->prev = attr_stack; | |
544 | attr_stack = elem; | |
545 | } | |
546 | } | |
547 | ||
d0bfd026 JH |
548 | static void prepare_attr_stack(const char *path, int dirlen) |
549 | { | |
550 | struct attr_stack *elem, *info; | |
551 | int len; | |
f66cf96d DP |
552 | struct strbuf pathbuf; |
553 | ||
554 | strbuf_init(&pathbuf, dirlen+2+strlen(GITATTRIBUTES_FILE)); | |
d0bfd026 JH |
555 | |
556 | /* | |
557 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
558 | * set of attribute definitions, followed by the contents |
559 | * of $(prefix)/etc/gitattributes and a file specified by | |
560 | * core.attributesfile. Then, contents from | |
d0bfd026 JH |
561 | * .gitattribute files from directories closer to the |
562 | * root to the ones in deeper directories are pushed | |
563 | * to the stack. Finally, at the very top of the stack | |
564 | * we always keep the contents of $GIT_DIR/info/attributes. | |
565 | * | |
566 | * When checking, we use entries from near the top of the | |
567 | * stack, preferring $GIT_DIR/info/attributes, then | |
568 | * .gitattributes in deeper directories to shallower ones, | |
569 | * and finally use the built-in set as the default. | |
570 | */ | |
f48fd688 JH |
571 | if (!attr_stack) |
572 | bootstrap_attr_stack(); | |
d0bfd026 JH |
573 | |
574 | /* | |
575 | * Pop the "info" one that is always at the top of the stack. | |
576 | */ | |
577 | info = attr_stack; | |
578 | attr_stack = info->prev; | |
579 | ||
580 | /* | |
581 | * Pop the ones from directories that are not the prefix of | |
582 | * the path we are checking. | |
583 | */ | |
584 | while (attr_stack && attr_stack->origin) { | |
585 | int namelen = strlen(attr_stack->origin); | |
586 | ||
587 | elem = attr_stack; | |
588 | if (namelen <= dirlen && | |
589 | !strncmp(elem->origin, path, namelen)) | |
590 | break; | |
591 | ||
592 | debug_pop(elem); | |
593 | attr_stack = elem->prev; | |
594 | free_attr_elem(elem); | |
595 | } | |
596 | ||
597 | /* | |
598 | * Read from parent directories and push them down | |
599 | */ | |
4191e80a | 600 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
2d35d556 RS |
601 | while (1) { |
602 | char *cp; | |
603 | ||
604 | len = strlen(attr_stack->origin); | |
605 | if (dirlen <= len) | |
606 | break; | |
f66cf96d DP |
607 | strbuf_reset(&pathbuf); |
608 | strbuf_add(&pathbuf, path, dirlen); | |
609 | strbuf_addch(&pathbuf, '/'); | |
610 | cp = strchr(pathbuf.buf + len + 1, '/'); | |
2d35d556 | 611 | strcpy(cp + 1, GITATTRIBUTES_FILE); |
f66cf96d | 612 | elem = read_attr(pathbuf.buf, 0); |
2d35d556 | 613 | *cp = '\0'; |
f66cf96d | 614 | elem->origin = strdup(pathbuf.buf); |
2d35d556 RS |
615 | elem->prev = attr_stack; |
616 | attr_stack = elem; | |
617 | debug_push(elem); | |
618 | } | |
d0bfd026 JH |
619 | } |
620 | ||
d4c98565 RS |
621 | strbuf_release(&pathbuf); |
622 | ||
d0bfd026 JH |
623 | /* |
624 | * Finally push the "info" one at the top of the stack. | |
625 | */ | |
626 | info->prev = attr_stack; | |
627 | attr_stack = info; | |
628 | } | |
629 | ||
630 | static int path_matches(const char *pathname, int pathlen, | |
631 | const char *pattern, | |
632 | const char *base, int baselen) | |
633 | { | |
634 | if (!strchr(pattern, '/')) { | |
635 | /* match basename */ | |
636 | const char *basename = strrchr(pathname, '/'); | |
637 | basename = basename ? basename + 1 : pathname; | |
638 | return (fnmatch(pattern, basename, 0) == 0); | |
639 | } | |
640 | /* | |
641 | * match with FNM_PATHNAME; the pattern has base implicitly | |
642 | * in front of it. | |
643 | */ | |
644 | if (*pattern == '/') | |
645 | pattern++; | |
646 | if (pathlen < baselen || | |
cf94ccda | 647 | (baselen && pathname[baselen] != '/') || |
d0bfd026 JH |
648 | strncmp(pathname, base, baselen)) |
649 | return 0; | |
82881b38 MO |
650 | if (baselen != 0) |
651 | baselen++; | |
652 | return fnmatch(pattern, pathname + baselen, FNM_PATHNAME) == 0; | |
d0bfd026 JH |
653 | } |
654 | ||
ec775c41 HG |
655 | static int macroexpand_one(int attr_nr, int rem); |
656 | ||
515106fa JH |
657 | static int fill_one(const char *what, struct match_attr *a, int rem) |
658 | { | |
659 | struct git_attr_check *check = check_all_attr; | |
660 | int i; | |
661 | ||
969f9d73 | 662 | for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) { |
515106fa | 663 | struct git_attr *attr = a->state[i].attr; |
a5e92abd JH |
664 | const char **n = &(check[attr->attr_nr].value); |
665 | const char *v = a->state[i].setto; | |
515106fa JH |
666 | |
667 | if (*n == ATTR__UNKNOWN) { | |
426c27b7 HG |
668 | debug_set(what, |
669 | a->is_macro ? a->u.attr->name : a->u.pattern, | |
670 | attr, v); | |
515106fa JH |
671 | *n = v; |
672 | rem--; | |
ec775c41 | 673 | rem = macroexpand_one(attr->attr_nr, rem); |
515106fa JH |
674 | } |
675 | } | |
676 | return rem; | |
677 | } | |
678 | ||
f48fd688 | 679 | static int fill(const char *path, int pathlen, struct attr_stack *stk, int rem) |
d0bfd026 | 680 | { |
515106fa | 681 | int i; |
d0bfd026 JH |
682 | const char *base = stk->origin ? stk->origin : ""; |
683 | ||
684 | for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) { | |
685 | struct match_attr *a = stk->attrs[i]; | |
f48fd688 JH |
686 | if (a->is_macro) |
687 | continue; | |
d0bfd026 | 688 | if (path_matches(path, pathlen, |
515106fa JH |
689 | a->u.pattern, base, strlen(base))) |
690 | rem = fill_one("fill", a, rem); | |
d0bfd026 JH |
691 | } |
692 | return rem; | |
693 | } | |
694 | ||
ec775c41 | 695 | static int macroexpand_one(int attr_nr, int rem) |
f48fd688 | 696 | { |
ec775c41 HG |
697 | struct attr_stack *stk; |
698 | struct match_attr *a = NULL; | |
515106fa | 699 | int i; |
f48fd688 | 700 | |
ec775c41 HG |
701 | if (check_all_attr[attr_nr].value != ATTR__TRUE) |
702 | return rem; | |
703 | ||
704 | for (stk = attr_stack; !a && stk; stk = stk->prev) | |
705 | for (i = stk->num_matches - 1; !a && 0 <= i; i--) { | |
706 | struct match_attr *ma = stk->attrs[i]; | |
707 | if (!ma->is_macro) | |
708 | continue; | |
709 | if (ma->u.attr->attr_nr == attr_nr) | |
710 | a = ma; | |
711 | } | |
712 | ||
713 | if (a) | |
515106fa | 714 | rem = fill_one("expand", a, rem); |
ec775c41 | 715 | |
f48fd688 JH |
716 | return rem; |
717 | } | |
718 | ||
d0bfd026 JH |
719 | int git_checkattr(const char *path, int num, struct git_attr_check *check) |
720 | { | |
721 | struct attr_stack *stk; | |
722 | const char *cp; | |
723 | int dirlen, pathlen, i, rem; | |
724 | ||
f48fd688 JH |
725 | bootstrap_attr_stack(); |
726 | for (i = 0; i < attr_nr; i++) | |
515106fa | 727 | check_all_attr[i].value = ATTR__UNKNOWN; |
d0bfd026 JH |
728 | |
729 | pathlen = strlen(path); | |
730 | cp = strrchr(path, '/'); | |
731 | if (!cp) | |
732 | dirlen = 0; | |
733 | else | |
734 | dirlen = cp - path; | |
735 | prepare_attr_stack(path, dirlen); | |
f48fd688 JH |
736 | rem = attr_nr; |
737 | for (stk = attr_stack; 0 < rem && stk; stk = stk->prev) | |
738 | rem = fill(path, pathlen, stk, rem); | |
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 JH |
749 | |
750 | void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate) | |
751 | { | |
752 | enum git_attr_direction old = direction; | |
4191e80a NTND |
753 | |
754 | if (is_bare_repository() && new != GIT_ATTR_INDEX) | |
755 | die("BUG: non-INDEX attr direction in a bare repo"); | |
756 | ||
06f33c17 JH |
757 | direction = new; |
758 | if (new != old) | |
759 | drop_attr_stack(); | |
760 | use_index = istate; | |
761 | } |