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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 | 13 | #include "attr.h" |
6eba6210 | 14 | #include "dir.h" |
d0bfd026 | 15 | |
a5e92abd JH |
16 | const char git_attr__true[] = "(builtin)true"; |
17 | const char git_attr__false[] = "\0(builtin)false"; | |
18 | static const char git_attr__unknown[] = "(builtin)unknown"; | |
19 | #define ATTR__TRUE git_attr__true | |
20 | #define ATTR__FALSE git_attr__false | |
21 | #define ATTR__UNSET NULL | |
22 | #define ATTR__UNKNOWN git_attr__unknown | |
515106fa | 23 | |
86ab7f0c | 24 | /* This is a randomly chosen prime. */ |
d0bfd026 JH |
25 | #define HASHSIZE 257 |
26 | ||
27 | #ifndef DEBUG_ATTR | |
28 | #define DEBUG_ATTR 0 | |
29 | #endif | |
30 | ||
31 | struct git_attr { | |
32 | struct git_attr *next; | |
33 | unsigned h; | |
f48fd688 | 34 | int attr_nr; |
d0bfd026 JH |
35 | char name[FLEX_ARRAY]; |
36 | }; | |
f48fd688 | 37 | static int attr_nr; |
d0bfd026 | 38 | |
f48fd688 | 39 | static struct git_attr_check *check_all_attr; |
d0bfd026 JH |
40 | static struct git_attr *(git_attr_hash[HASHSIZE]); |
41 | ||
352404ac MH |
42 | char *git_attr_name(struct git_attr *attr) |
43 | { | |
44 | return attr->name; | |
45 | } | |
46 | ||
d0bfd026 JH |
47 | static unsigned hash_name(const char *name, int namelen) |
48 | { | |
48fb7deb | 49 | unsigned val = 0, c; |
d0bfd026 JH |
50 | |
51 | while (namelen--) { | |
52 | c = *name++; | |
53 | val = ((val << 7) | (val >> 22)) ^ c; | |
54 | } | |
55 | return val; | |
56 | } | |
57 | ||
e4aee10a JH |
58 | static int invalid_attr_name(const char *name, int namelen) |
59 | { | |
60 | /* | |
d42453ab MH |
61 | * Attribute name cannot begin with '-' and must consist of |
62 | * characters from [-A-Za-z0-9_.]. | |
e4aee10a | 63 | */ |
c0b13b21 | 64 | if (namelen <= 0 || *name == '-') |
e4aee10a JH |
65 | return -1; |
66 | while (namelen--) { | |
67 | char ch = *name++; | |
68 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
69 | ('0' <= ch && ch <= '9') || | |
70 | ('a' <= ch && ch <= 'z') || | |
71 | ('A' <= ch && ch <= 'Z')) ) | |
72 | return -1; | |
73 | } | |
74 | return 0; | |
75 | } | |
76 | ||
7fb0eaa2 | 77 | static struct git_attr *git_attr_internal(const char *name, int len) |
d0bfd026 JH |
78 | { |
79 | unsigned hval = hash_name(name, len); | |
80 | unsigned pos = hval % HASHSIZE; | |
81 | struct git_attr *a; | |
82 | ||
83 | for (a = git_attr_hash[pos]; a; a = a->next) { | |
84 | if (a->h == hval && | |
85 | !memcmp(a->name, name, len) && !a->name[len]) | |
86 | return a; | |
87 | } | |
88 | ||
e4aee10a JH |
89 | if (invalid_attr_name(name, len)) |
90 | return NULL; | |
91 | ||
d0bfd026 JH |
92 | a = xmalloc(sizeof(*a) + len + 1); |
93 | memcpy(a->name, name, len); | |
94 | a->name[len] = 0; | |
95 | a->h = hval; | |
96 | a->next = git_attr_hash[pos]; | |
f48fd688 | 97 | a->attr_nr = attr_nr++; |
d0bfd026 | 98 | git_attr_hash[pos] = a; |
f48fd688 JH |
99 | |
100 | check_all_attr = xrealloc(check_all_attr, | |
101 | sizeof(*check_all_attr) * attr_nr); | |
102 | check_all_attr[a->attr_nr].attr = a; | |
515106fa | 103 | check_all_attr[a->attr_nr].value = ATTR__UNKNOWN; |
d0bfd026 JH |
104 | return a; |
105 | } | |
106 | ||
7fb0eaa2 JH |
107 | struct git_attr *git_attr(const char *name) |
108 | { | |
109 | return git_attr_internal(name, strlen(name)); | |
110 | } | |
111 | ||
515106fa | 112 | /* What does a matched pattern decide? */ |
d0bfd026 | 113 | struct attr_state { |
d0bfd026 | 114 | struct git_attr *attr; |
a5e92abd | 115 | const char *setto; |
d0bfd026 JH |
116 | }; |
117 | ||
82dce998 NTND |
118 | struct pattern { |
119 | const char *pattern; | |
120 | int patternlen; | |
121 | int nowildcardlen; | |
122 | int flags; /* EXC_FLAG_* */ | |
123 | }; | |
124 | ||
ba845b75 MH |
125 | /* |
126 | * One rule, as from a .gitattributes file. | |
127 | * | |
128 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
129 | * defined. | |
130 | * | |
131 | * If is_macro is false, then u.pattern points at the filename pattern | |
132 | * to which the rule applies. (The memory pointed to is part of the | |
133 | * memory block allocated for the match_attr instance.) | |
134 | * | |
135 | * In either case, num_attr is the number of attributes affected by | |
136 | * this rule, and state is an array listing them. The attributes are | |
137 | * listed as they appear in the file (macros unexpanded). | |
138 | */ | |
d0bfd026 | 139 | struct match_attr { |
f48fd688 | 140 | union { |
82dce998 | 141 | struct pattern pat; |
f48fd688 JH |
142 | struct git_attr *attr; |
143 | } u; | |
144 | char is_macro; | |
d0bfd026 JH |
145 | unsigned num_attr; |
146 | struct attr_state state[FLEX_ARRAY]; | |
147 | }; | |
148 | ||
149 | static const char blank[] = " \t\r\n"; | |
150 | ||
d1751298 MH |
151 | /* |
152 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
153 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
154 | * If e is not NULL, write the results to *e. Return a pointer to the | |
155 | * remainder of the string (with leading whitespace removed), or NULL | |
156 | * if there was an error. | |
157 | */ | |
515106fa | 158 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
d1751298 | 159 | struct attr_state *e) |
515106fa JH |
160 | { |
161 | const char *ep, *equals; | |
162 | int len; | |
163 | ||
164 | ep = cp + strcspn(cp, blank); | |
165 | equals = strchr(cp, '='); | |
166 | if (equals && ep < equals) | |
167 | equals = NULL; | |
168 | if (equals) | |
169 | len = equals - cp; | |
170 | else | |
171 | len = ep - cp; | |
d1751298 | 172 | if (!e) { |
515106fa JH |
173 | if (*cp == '-' || *cp == '!') { |
174 | cp++; | |
175 | len--; | |
176 | } | |
177 | if (invalid_attr_name(cp, len)) { | |
178 | fprintf(stderr, | |
179 | "%.*s is not a valid attribute name: %s:%d\n", | |
180 | len, cp, src, lineno); | |
181 | return NULL; | |
182 | } | |
183 | } else { | |
515106fa JH |
184 | if (*cp == '-' || *cp == '!') { |
185 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
186 | cp++; | |
187 | len--; | |
188 | } | |
189 | else if (!equals) | |
190 | e->setto = ATTR__TRUE; | |
191 | else { | |
182af834 | 192 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 193 | } |
7fb0eaa2 | 194 | e->attr = git_attr_internal(cp, len); |
515106fa | 195 | } |
515106fa JH |
196 | return ep + strspn(ep, blank); |
197 | } | |
198 | ||
f48fd688 JH |
199 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
200 | int lineno, int macro_ok) | |
d0bfd026 JH |
201 | { |
202 | int namelen; | |
d68e1c18 | 203 | int num_attr, i; |
85c4a0d0 | 204 | const char *cp, *name, *states; |
515106fa | 205 | struct match_attr *res = NULL; |
f48fd688 | 206 | int is_macro; |
d0bfd026 JH |
207 | |
208 | cp = line + strspn(line, blank); | |
209 | if (!*cp || *cp == '#') | |
210 | return NULL; | |
211 | name = cp; | |
212 | namelen = strcspn(name, blank); | |
f48fd688 JH |
213 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && |
214 | !prefixcmp(name, ATTRIBUTE_MACRO_PREFIX)) { | |
215 | if (!macro_ok) { | |
216 | fprintf(stderr, "%s not allowed: %s:%d\n", | |
217 | name, src, lineno); | |
218 | return NULL; | |
219 | } | |
220 | is_macro = 1; | |
221 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
222 | name += strspn(name, blank); | |
223 | namelen = strcspn(name, blank); | |
e4aee10a JH |
224 | if (invalid_attr_name(name, namelen)) { |
225 | fprintf(stderr, | |
226 | "%.*s is not a valid attribute name: %s:%d\n", | |
227 | namelen, name, src, lineno); | |
228 | return NULL; | |
229 | } | |
f48fd688 JH |
230 | } |
231 | else | |
232 | is_macro = 0; | |
d0bfd026 | 233 | |
85c4a0d0 MH |
234 | states = name + namelen; |
235 | states += strspn(states, blank); | |
236 | ||
d68e1c18 MH |
237 | /* First pass to count the attr_states */ |
238 | for (cp = states, num_attr = 0; *cp; num_attr++) { | |
239 | cp = parse_attr(src, lineno, cp, NULL); | |
240 | if (!cp) | |
241 | return NULL; | |
d0bfd026 | 242 | } |
d68e1c18 MH |
243 | |
244 | res = xcalloc(1, | |
245 | sizeof(*res) + | |
246 | sizeof(struct attr_state) * num_attr + | |
247 | (is_macro ? 0 : namelen + 1)); | |
248 | if (is_macro) | |
249 | res->u.attr = git_attr_internal(name, namelen); | |
250 | else { | |
82dce998 NTND |
251 | char *p = (char *)&(res->state[num_attr]); |
252 | memcpy(p, name, namelen); | |
253 | res->u.pat.pattern = p; | |
254 | parse_exclude_pattern(&res->u.pat.pattern, | |
255 | &res->u.pat.patternlen, | |
256 | &res->u.pat.flags, | |
257 | &res->u.pat.nowildcardlen); | |
8b1bd024 TR |
258 | if (res->u.pat.flags & EXC_FLAG_NEGATIVE) { |
259 | warning(_("Negative patterns are ignored in git attributes\n" | |
260 | "Use '\\!' for literal leading exclamation.")); | |
261 | return NULL; | |
262 | } | |
d0bfd026 | 263 | } |
d68e1c18 MH |
264 | res->is_macro = is_macro; |
265 | res->num_attr = num_attr; | |
266 | ||
267 | /* Second pass to fill the attr_states */ | |
268 | for (cp = states, i = 0; *cp; i++) { | |
269 | cp = parse_attr(src, lineno, cp, &(res->state[i])); | |
270 | } | |
271 | ||
d0bfd026 JH |
272 | return res; |
273 | } | |
274 | ||
275 | /* | |
276 | * Like info/exclude and .gitignore, the attribute information can | |
277 | * come from many places. | |
278 | * | |
279 | * (1) .gitattribute file of the same directory; | |
515106fa JH |
280 | * (2) .gitattribute file of the parent directory if (1) does not have |
281 | * any match; this goes recursively upwards, just like .gitignore. | |
282 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
283 | * |
284 | * In the same file, later entries override the earlier match, so in the | |
285 | * global list, we would have entries from info/attributes the earliest | |
286 | * (reading the file from top to bottom), .gitattribute of the root | |
287 | * directory (again, reading the file from top to bottom) down to the | |
288 | * current directory, and then scan the list backwards to find the first match. | |
6d24e7a8 | 289 | * This is exactly the same as what is_excluded() does in dir.c to deal with |
d0bfd026 JH |
290 | * .gitignore |
291 | */ | |
292 | ||
293 | static struct attr_stack { | |
294 | struct attr_stack *prev; | |
295 | char *origin; | |
cd6a0b26 | 296 | size_t originlen; |
d0bfd026 | 297 | unsigned num_matches; |
a4413118 | 298 | unsigned alloc; |
d0bfd026 JH |
299 | struct match_attr **attrs; |
300 | } *attr_stack; | |
301 | ||
302 | static void free_attr_elem(struct attr_stack *e) | |
303 | { | |
304 | int i; | |
305 | free(e->origin); | |
515106fa JH |
306 | for (i = 0; i < e->num_matches; i++) { |
307 | struct match_attr *a = e->attrs[i]; | |
308 | int j; | |
309 | for (j = 0; j < a->num_attr; j++) { | |
a5e92abd | 310 | const char *setto = a->state[j].setto; |
515106fa JH |
311 | if (setto == ATTR__TRUE || |
312 | setto == ATTR__FALSE || | |
313 | setto == ATTR__UNSET || | |
314 | setto == ATTR__UNKNOWN) | |
315 | ; | |
316 | else | |
4b25d091 | 317 | free((char *) setto); |
515106fa JH |
318 | } |
319 | free(a); | |
320 | } | |
37475f97 | 321 | free(e->attrs); |
d0bfd026 JH |
322 | free(e); |
323 | } | |
324 | ||
325 | static const char *builtin_attr[] = { | |
155a4b71 | 326 | "[attr]binary -diff -merge -text", |
d0bfd026 JH |
327 | NULL, |
328 | }; | |
329 | ||
a4413118 JH |
330 | static void handle_attr_line(struct attr_stack *res, |
331 | const char *line, | |
332 | const char *src, | |
333 | int lineno, | |
334 | int macro_ok) | |
335 | { | |
336 | struct match_attr *a; | |
337 | ||
338 | a = parse_attr_line(line, src, lineno, macro_ok); | |
339 | if (!a) | |
340 | return; | |
341 | if (res->alloc <= res->num_matches) { | |
342 | res->alloc = alloc_nr(res->num_matches); | |
343 | res->attrs = xrealloc(res->attrs, | |
344 | sizeof(struct match_attr *) * | |
345 | res->alloc); | |
346 | } | |
347 | res->attrs[res->num_matches++] = a; | |
348 | } | |
349 | ||
d0bfd026 JH |
350 | static struct attr_stack *read_attr_from_array(const char **list) |
351 | { | |
352 | struct attr_stack *res; | |
353 | const char *line; | |
f48fd688 | 354 | int lineno = 0; |
d0bfd026 JH |
355 | |
356 | res = xcalloc(1, sizeof(*res)); | |
a4413118 JH |
357 | while ((line = *(list++)) != NULL) |
358 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
d0bfd026 JH |
359 | return res; |
360 | } | |
361 | ||
06f33c17 JH |
362 | static enum git_attr_direction direction; |
363 | static struct index_state *use_index; | |
364 | ||
f48fd688 | 365 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) |
d0bfd026 | 366 | { |
a4413118 | 367 | FILE *fp = fopen(path, "r"); |
d0bfd026 JH |
368 | struct attr_stack *res; |
369 | char buf[2048]; | |
f48fd688 | 370 | int lineno = 0; |
d0bfd026 | 371 | |
11e50b27 | 372 | if (!fp) { |
8e950dab | 373 | if (errno != ENOENT && errno != ENOTDIR) |
55b38a48 | 374 | warn_on_inaccessible(path); |
a4413118 | 375 | return NULL; |
11e50b27 | 376 | } |
a4413118 JH |
377 | res = xcalloc(1, sizeof(*res)); |
378 | while (fgets(buf, sizeof(buf), fp)) | |
379 | handle_attr_line(res, buf, path, ++lineno, macro_ok); | |
380 | fclose(fp); | |
381 | return res; | |
382 | } | |
d0bfd026 | 383 | |
06f33c17 | 384 | static struct attr_stack *read_attr_from_index(const char *path, int macro_ok) |
a4413118 JH |
385 | { |
386 | struct attr_stack *res; | |
1a9d7e9b JH |
387 | char *buf, *sp; |
388 | int lineno = 0; | |
f48fd688 | 389 | |
ff366825 | 390 | buf = read_blob_data_from_index(use_index ? use_index : &the_index, path, NULL); |
1a9d7e9b | 391 | if (!buf) |
06f33c17 | 392 | return NULL; |
1a9d7e9b | 393 | |
06f33c17 | 394 | res = xcalloc(1, sizeof(*res)); |
1a9d7e9b JH |
395 | for (sp = buf; *sp; ) { |
396 | char *ep; | |
397 | int more; | |
398 | for (ep = sp; *ep && *ep != '\n'; ep++) | |
399 | ; | |
400 | more = (*ep == '\n'); | |
401 | *ep = '\0'; | |
402 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
403 | sp = ep + more; | |
404 | } | |
405 | free(buf); | |
d0bfd026 JH |
406 | return res; |
407 | } | |
408 | ||
06f33c17 JH |
409 | static struct attr_stack *read_attr(const char *path, int macro_ok) |
410 | { | |
411 | struct attr_stack *res; | |
412 | ||
413 | if (direction == GIT_ATTR_CHECKOUT) { | |
414 | res = read_attr_from_index(path, macro_ok); | |
415 | if (!res) | |
416 | res = read_attr_from_file(path, macro_ok); | |
417 | } | |
4191e80a | 418 | else if (direction == GIT_ATTR_CHECKIN) { |
06f33c17 JH |
419 | res = read_attr_from_file(path, macro_ok); |
420 | if (!res) | |
421 | /* | |
422 | * There is no checked out .gitattributes file there, but | |
423 | * we might have it in the index. We allow operation in a | |
424 | * sparsely checked out work tree, so read from it. | |
425 | */ | |
426 | res = read_attr_from_index(path, macro_ok); | |
427 | } | |
4191e80a NTND |
428 | else |
429 | res = read_attr_from_index(path, macro_ok); | |
06f33c17 JH |
430 | if (!res) |
431 | res = xcalloc(1, sizeof(*res)); | |
432 | return res; | |
433 | } | |
434 | ||
d0bfd026 JH |
435 | #if DEBUG_ATTR |
436 | static void debug_info(const char *what, struct attr_stack *elem) | |
437 | { | |
438 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
439 | } | |
cf94ccda | 440 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) |
f48fd688 | 441 | { |
515106fa JH |
442 | const char *value = v; |
443 | ||
444 | if (ATTR_TRUE(value)) | |
445 | value = "set"; | |
446 | else if (ATTR_FALSE(value)) | |
447 | value = "unset"; | |
448 | else if (ATTR_UNSET(value)) | |
449 | value = "unspecified"; | |
450 | ||
451 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
452 | what, attr->name, (char *) value, match); | |
f48fd688 | 453 | } |
d0bfd026 JH |
454 | #define debug_push(a) debug_info("push", (a)) |
455 | #define debug_pop(a) debug_info("pop", (a)) | |
456 | #else | |
457 | #define debug_push(a) do { ; } while (0) | |
458 | #define debug_pop(a) do { ; } while (0) | |
f48fd688 | 459 | #define debug_set(a,b,c,d) do { ; } while (0) |
d0bfd026 JH |
460 | #endif |
461 | ||
06f33c17 JH |
462 | static void drop_attr_stack(void) |
463 | { | |
464 | while (attr_stack) { | |
465 | struct attr_stack *elem = attr_stack; | |
466 | attr_stack = elem->prev; | |
467 | free_attr_elem(elem); | |
468 | } | |
469 | } | |
470 | ||
c5147722 | 471 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
472 | { |
473 | static const char *system_wide; | |
474 | if (!system_wide) | |
475 | system_wide = system_path(ETC_GITATTRIBUTES); | |
476 | return system_wide; | |
477 | } | |
478 | ||
c5147722 | 479 | static int git_attr_system(void) |
6df42ab9 PO |
480 | { |
481 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
482 | } | |
483 | ||
f48fd688 JH |
484 | static void bootstrap_attr_stack(void) |
485 | { | |
909ca7b9 | 486 | struct attr_stack *elem; |
684e40f6 | 487 | char *xdg_attributes_file; |
f48fd688 | 488 | |
909ca7b9 JH |
489 | if (attr_stack) |
490 | return; | |
f48fd688 | 491 | |
909ca7b9 JH |
492 | elem = read_attr_from_array(builtin_attr); |
493 | elem->origin = NULL; | |
494 | elem->prev = attr_stack; | |
495 | attr_stack = elem; | |
6df42ab9 | 496 | |
909ca7b9 JH |
497 | if (git_attr_system()) { |
498 | elem = read_attr_from_file(git_etc_gitattributes(), 1); | |
499 | if (elem) { | |
500 | elem->origin = NULL; | |
501 | elem->prev = attr_stack; | |
502 | attr_stack = elem; | |
6df42ab9 | 503 | } |
909ca7b9 | 504 | } |
6df42ab9 | 505 | |
684e40f6 HKNN |
506 | if (!git_attributes_file) { |
507 | home_config_paths(NULL, &xdg_attributes_file, "attributes"); | |
508 | git_attributes_file = xdg_attributes_file; | |
509 | } | |
f0c1c15c JK |
510 | if (git_attributes_file) { |
511 | elem = read_attr_from_file(git_attributes_file, 1); | |
512 | if (elem) { | |
513 | elem->origin = NULL; | |
514 | elem->prev = attr_stack; | |
515 | attr_stack = elem; | |
516 | } | |
909ca7b9 | 517 | } |
f48fd688 | 518 | |
909ca7b9 JH |
519 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
520 | elem = read_attr(GITATTRIBUTES_FILE, 1); | |
6c65b5ea | 521 | elem->origin = xstrdup(""); |
cd6a0b26 | 522 | elem->originlen = 0; |
f48fd688 JH |
523 | elem->prev = attr_stack; |
524 | attr_stack = elem; | |
909ca7b9 | 525 | debug_push(elem); |
f48fd688 | 526 | } |
909ca7b9 JH |
527 | |
528 | elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1); | |
529 | if (!elem) | |
530 | elem = xcalloc(1, sizeof(*elem)); | |
531 | elem->origin = NULL; | |
532 | elem->prev = attr_stack; | |
533 | attr_stack = elem; | |
f48fd688 JH |
534 | } |
535 | ||
9db9eecf | 536 | static void prepare_attr_stack(const char *path, int dirlen) |
d0bfd026 JH |
537 | { |
538 | struct attr_stack *elem, *info; | |
9db9eecf | 539 | int len; |
a8727017 MH |
540 | const char *cp; |
541 | ||
d0bfd026 JH |
542 | /* |
543 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
544 | * set of attribute definitions, followed by the contents |
545 | * of $(prefix)/etc/gitattributes and a file specified by | |
546 | * core.attributesfile. Then, contents from | |
d0bfd026 JH |
547 | * .gitattribute files from directories closer to the |
548 | * root to the ones in deeper directories are pushed | |
549 | * to the stack. Finally, at the very top of the stack | |
550 | * we always keep the contents of $GIT_DIR/info/attributes. | |
551 | * | |
552 | * When checking, we use entries from near the top of the | |
553 | * stack, preferring $GIT_DIR/info/attributes, then | |
554 | * .gitattributes in deeper directories to shallower ones, | |
555 | * and finally use the built-in set as the default. | |
556 | */ | |
7373eab4 | 557 | bootstrap_attr_stack(); |
d0bfd026 JH |
558 | |
559 | /* | |
560 | * Pop the "info" one that is always at the top of the stack. | |
561 | */ | |
562 | info = attr_stack; | |
563 | attr_stack = info->prev; | |
564 | ||
565 | /* | |
566 | * Pop the ones from directories that are not the prefix of | |
c432ef99 JH |
567 | * the path we are checking. Break out of the loop when we see |
568 | * the root one (whose origin is an empty string "") or the builtin | |
569 | * one (whose origin is NULL) without popping it. | |
d0bfd026 | 570 | */ |
77f7f822 | 571 | while (attr_stack->origin) { |
d0bfd026 JH |
572 | int namelen = strlen(attr_stack->origin); |
573 | ||
574 | elem = attr_stack; | |
575 | if (namelen <= dirlen && | |
1afca444 JK |
576 | !strncmp(elem->origin, path, namelen) && |
577 | (!namelen || path[namelen] == '/')) | |
d0bfd026 JH |
578 | break; |
579 | ||
580 | debug_pop(elem); | |
581 | attr_stack = elem->prev; | |
582 | free_attr_elem(elem); | |
583 | } | |
584 | ||
585 | /* | |
586 | * Read from parent directories and push them down | |
587 | */ | |
4191e80a | 588 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
c432ef99 JH |
589 | /* |
590 | * bootstrap_attr_stack() should have added, and the | |
591 | * above loop should have stopped before popping, the | |
592 | * root element whose attr_stack->origin is set to an | |
593 | * empty string. | |
594 | */ | |
97410b27 | 595 | struct strbuf pathbuf = STRBUF_INIT; |
2d35d556 | 596 | |
c432ef99 | 597 | assert(attr_stack->origin); |
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 | 609 | strbuf_setlen(&pathbuf, cp - path); |
cd6a0b26 | 610 | elem->origin = strbuf_detach(&pathbuf, &elem->originlen); |
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, | |
bd2f371d | 627 | int basename_offset, |
82dce998 | 628 | const struct pattern *pat, |
d0bfd026 JH |
629 | const char *base, int baselen) |
630 | { | |
82dce998 NTND |
631 | const char *pattern = pat->pattern; |
632 | int prefix = pat->nowildcardlen; | |
dc09e9ec | 633 | int isdir = (pathlen && pathname[pathlen - 1] == '/'); |
82dce998 | 634 | |
dc09e9ec | 635 | if ((pat->flags & EXC_FLAG_MUSTBEDIR) && !isdir) |
94bc671a JNA |
636 | return 0; |
637 | ||
82dce998 | 638 | if (pat->flags & EXC_FLAG_NODIR) { |
bd2f371d | 639 | return match_basename(pathname + basename_offset, |
dc09e9ec | 640 | pathlen - basename_offset - isdir, |
82dce998 NTND |
641 | pattern, prefix, |
642 | pat->patternlen, pat->flags); | |
d0bfd026 | 643 | } |
dc09e9ec | 644 | return match_pathname(pathname, pathlen - isdir, |
82dce998 NTND |
645 | base, baselen, |
646 | pattern, prefix, pat->patternlen, pat->flags); | |
d0bfd026 JH |
647 | } |
648 | ||
ec775c41 HG |
649 | static int macroexpand_one(int attr_nr, int rem); |
650 | ||
515106fa JH |
651 | static int fill_one(const char *what, struct match_attr *a, int rem) |
652 | { | |
653 | struct git_attr_check *check = check_all_attr; | |
654 | int i; | |
655 | ||
969f9d73 | 656 | for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) { |
515106fa | 657 | struct git_attr *attr = a->state[i].attr; |
a5e92abd JH |
658 | const char **n = &(check[attr->attr_nr].value); |
659 | const char *v = a->state[i].setto; | |
515106fa JH |
660 | |
661 | if (*n == ATTR__UNKNOWN) { | |
426c27b7 | 662 | debug_set(what, |
712efb1a | 663 | a->is_macro ? a->u.attr->name : a->u.pat.pattern, |
426c27b7 | 664 | attr, v); |
515106fa JH |
665 | *n = v; |
666 | rem--; | |
ec775c41 | 667 | rem = macroexpand_one(attr->attr_nr, rem); |
515106fa JH |
668 | } |
669 | } | |
670 | return rem; | |
671 | } | |
672 | ||
bd2f371d | 673 | static int fill(const char *path, int pathlen, int basename_offset, |
4742d136 | 674 | struct attr_stack *stk, int rem) |
d0bfd026 | 675 | { |
515106fa | 676 | int i; |
d0bfd026 JH |
677 | const char *base = stk->origin ? stk->origin : ""; |
678 | ||
679 | for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) { | |
680 | struct match_attr *a = stk->attrs[i]; | |
f48fd688 JH |
681 | if (a->is_macro) |
682 | continue; | |
bd2f371d | 683 | if (path_matches(path, pathlen, basename_offset, |
82dce998 | 684 | &a->u.pat, base, stk->originlen)) |
515106fa | 685 | rem = fill_one("fill", a, rem); |
d0bfd026 JH |
686 | } |
687 | return rem; | |
688 | } | |
689 | ||
ec775c41 | 690 | static int macroexpand_one(int attr_nr, int rem) |
f48fd688 | 691 | { |
ec775c41 HG |
692 | struct attr_stack *stk; |
693 | struct match_attr *a = NULL; | |
515106fa | 694 | int i; |
f48fd688 | 695 | |
ec775c41 HG |
696 | if (check_all_attr[attr_nr].value != ATTR__TRUE) |
697 | return rem; | |
698 | ||
699 | for (stk = attr_stack; !a && stk; stk = stk->prev) | |
700 | for (i = stk->num_matches - 1; !a && 0 <= i; i--) { | |
701 | struct match_attr *ma = stk->attrs[i]; | |
702 | if (!ma->is_macro) | |
703 | continue; | |
704 | if (ma->u.attr->attr_nr == attr_nr) | |
705 | a = ma; | |
706 | } | |
707 | ||
708 | if (a) | |
515106fa | 709 | rem = fill_one("expand", a, rem); |
ec775c41 | 710 | |
f48fd688 JH |
711 | return rem; |
712 | } | |
713 | ||
2d721744 MH |
714 | /* |
715 | * Collect all attributes for path into the array pointed to by | |
716 | * check_all_attr. | |
717 | */ | |
718 | static void collect_all_attrs(const char *path) | |
d0bfd026 JH |
719 | { |
720 | struct attr_stack *stk; | |
9db9eecf | 721 | int i, pathlen, rem, dirlen; |
bd2f371d JH |
722 | const char *cp, *last_slash = NULL; |
723 | int basename_offset; | |
9db9eecf NTND |
724 | |
725 | for (cp = path; *cp; cp++) { | |
726 | if (*cp == '/' && cp[1]) | |
727 | last_slash = cp; | |
728 | } | |
729 | pathlen = cp - path; | |
730 | if (last_slash) { | |
bd2f371d | 731 | basename_offset = last_slash + 1 - path; |
9db9eecf NTND |
732 | dirlen = last_slash - path; |
733 | } else { | |
bd2f371d | 734 | basename_offset = 0; |
9db9eecf NTND |
735 | dirlen = 0; |
736 | } | |
d0bfd026 | 737 | |
9db9eecf | 738 | prepare_attr_stack(path, dirlen); |
f48fd688 | 739 | for (i = 0; i < attr_nr; i++) |
515106fa | 740 | check_all_attr[i].value = ATTR__UNKNOWN; |
d0bfd026 | 741 | |
f48fd688 JH |
742 | rem = attr_nr; |
743 | for (stk = attr_stack; 0 < rem && stk; stk = stk->prev) | |
bd2f371d | 744 | rem = fill(path, pathlen, basename_offset, 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 | } |