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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" |
27547e5f | 15 | #include "utf8.h" |
d0bfd026 | 16 | |
a5e92abd JH |
17 | const char git_attr__true[] = "(builtin)true"; |
18 | const char git_attr__false[] = "\0(builtin)false"; | |
19 | static const char git_attr__unknown[] = "(builtin)unknown"; | |
20 | #define ATTR__TRUE git_attr__true | |
21 | #define ATTR__FALSE git_attr__false | |
22 | #define ATTR__UNSET NULL | |
23 | #define ATTR__UNKNOWN git_attr__unknown | |
515106fa | 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; |
fad32bcd | 36 | int maybe_macro; |
06a604e6 | 37 | int maybe_real; |
d0bfd026 JH |
38 | char name[FLEX_ARRAY]; |
39 | }; | |
f48fd688 | 40 | static int attr_nr; |
06a604e6 | 41 | static int cannot_trust_maybe_real; |
d0bfd026 | 42 | |
f48fd688 | 43 | static struct git_attr_check *check_all_attr; |
d0bfd026 JH |
44 | static struct git_attr *(git_attr_hash[HASHSIZE]); |
45 | ||
ec4d77aa | 46 | const char *git_attr_name(const struct git_attr *attr) |
352404ac MH |
47 | { |
48 | return attr->name; | |
49 | } | |
50 | ||
d0bfd026 JH |
51 | static unsigned hash_name(const char *name, int namelen) |
52 | { | |
48fb7deb | 53 | unsigned val = 0, c; |
d0bfd026 JH |
54 | |
55 | while (namelen--) { | |
56 | c = *name++; | |
57 | val = ((val << 7) | (val >> 22)) ^ c; | |
58 | } | |
59 | return val; | |
60 | } | |
61 | ||
e4aee10a JH |
62 | static int invalid_attr_name(const char *name, int namelen) |
63 | { | |
64 | /* | |
d42453ab MH |
65 | * Attribute name cannot begin with '-' and must consist of |
66 | * characters from [-A-Za-z0-9_.]. | |
e4aee10a | 67 | */ |
c0b13b21 | 68 | if (namelen <= 0 || *name == '-') |
e4aee10a JH |
69 | return -1; |
70 | while (namelen--) { | |
71 | char ch = *name++; | |
72 | if (! (ch == '-' || ch == '.' || ch == '_' || | |
73 | ('0' <= ch && ch <= '9') || | |
74 | ('a' <= ch && ch <= 'z') || | |
75 | ('A' <= ch && ch <= 'Z')) ) | |
76 | return -1; | |
77 | } | |
78 | return 0; | |
79 | } | |
80 | ||
7fb0eaa2 | 81 | static struct git_attr *git_attr_internal(const char *name, int len) |
d0bfd026 JH |
82 | { |
83 | unsigned hval = hash_name(name, len); | |
84 | unsigned pos = hval % HASHSIZE; | |
85 | struct git_attr *a; | |
86 | ||
87 | for (a = git_attr_hash[pos]; a; a = a->next) { | |
88 | if (a->h == hval && | |
89 | !memcmp(a->name, name, len) && !a->name[len]) | |
90 | return a; | |
91 | } | |
92 | ||
e4aee10a JH |
93 | if (invalid_attr_name(name, len)) |
94 | return NULL; | |
95 | ||
96ffc06f | 96 | FLEX_ALLOC_MEM(a, name, name, len); |
d0bfd026 JH |
97 | a->h = hval; |
98 | a->next = git_attr_hash[pos]; | |
f48fd688 | 99 | a->attr_nr = attr_nr++; |
fad32bcd | 100 | a->maybe_macro = 0; |
06a604e6 | 101 | a->maybe_real = 0; |
d0bfd026 | 102 | git_attr_hash[pos] = a; |
f48fd688 | 103 | |
2756ca43 | 104 | REALLOC_ARRAY(check_all_attr, attr_nr); |
f48fd688 | 105 | check_all_attr[a->attr_nr].attr = a; |
515106fa | 106 | check_all_attr[a->attr_nr].value = ATTR__UNKNOWN; |
d0bfd026 JH |
107 | return a; |
108 | } | |
109 | ||
7fb0eaa2 JH |
110 | struct git_attr *git_attr(const char *name) |
111 | { | |
112 | return git_attr_internal(name, strlen(name)); | |
113 | } | |
114 | ||
515106fa | 115 | /* What does a matched pattern decide? */ |
d0bfd026 | 116 | struct attr_state { |
d0bfd026 | 117 | struct git_attr *attr; |
a5e92abd | 118 | const char *setto; |
d0bfd026 JH |
119 | }; |
120 | ||
82dce998 NTND |
121 | struct pattern { |
122 | const char *pattern; | |
123 | int patternlen; | |
124 | int nowildcardlen; | |
f8708998 | 125 | unsigned flags; /* EXC_FLAG_* */ |
82dce998 NTND |
126 | }; |
127 | ||
ba845b75 MH |
128 | /* |
129 | * One rule, as from a .gitattributes file. | |
130 | * | |
131 | * If is_macro is true, then u.attr is a pointer to the git_attr being | |
132 | * defined. | |
133 | * | |
4894f4ff JH |
134 | * If is_macro is false, then u.pat is the filename pattern to which the |
135 | * rule applies. | |
ba845b75 MH |
136 | * |
137 | * In either case, num_attr is the number of attributes affected by | |
138 | * this rule, and state is an array listing them. The attributes are | |
139 | * listed as they appear in the file (macros unexpanded). | |
140 | */ | |
d0bfd026 | 141 | struct match_attr { |
f48fd688 | 142 | union { |
82dce998 | 143 | struct pattern pat; |
f48fd688 JH |
144 | struct git_attr *attr; |
145 | } u; | |
146 | char is_macro; | |
d0bfd026 JH |
147 | unsigned num_attr; |
148 | struct attr_state state[FLEX_ARRAY]; | |
149 | }; | |
150 | ||
151 | static const char blank[] = " \t\r\n"; | |
152 | ||
d1751298 MH |
153 | /* |
154 | * Parse a whitespace-delimited attribute state (i.e., "attr", | |
155 | * "-attr", "!attr", or "attr=value") from the string starting at src. | |
156 | * If e is not NULL, write the results to *e. Return a pointer to the | |
157 | * remainder of the string (with leading whitespace removed), or NULL | |
158 | * if there was an error. | |
159 | */ | |
515106fa | 160 | static const char *parse_attr(const char *src, int lineno, const char *cp, |
d1751298 | 161 | struct attr_state *e) |
515106fa JH |
162 | { |
163 | const char *ep, *equals; | |
164 | int len; | |
165 | ||
166 | ep = cp + strcspn(cp, blank); | |
167 | equals = strchr(cp, '='); | |
168 | if (equals && ep < equals) | |
169 | equals = NULL; | |
170 | if (equals) | |
171 | len = equals - cp; | |
172 | else | |
173 | len = ep - cp; | |
d1751298 | 174 | if (!e) { |
515106fa JH |
175 | if (*cp == '-' || *cp == '!') { |
176 | cp++; | |
177 | len--; | |
178 | } | |
179 | if (invalid_attr_name(cp, len)) { | |
180 | fprintf(stderr, | |
181 | "%.*s is not a valid attribute name: %s:%d\n", | |
182 | len, cp, src, lineno); | |
183 | return NULL; | |
184 | } | |
185 | } else { | |
5a884019 JH |
186 | /* |
187 | * As this function is always called twice, once with | |
188 | * e == NULL in the first pass and then e != NULL in | |
189 | * the second pass, no need for invalid_attr_name() | |
190 | * check here. | |
191 | */ | |
515106fa JH |
192 | if (*cp == '-' || *cp == '!') { |
193 | e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET; | |
194 | cp++; | |
195 | len--; | |
196 | } | |
197 | else if (!equals) | |
198 | e->setto = ATTR__TRUE; | |
199 | else { | |
182af834 | 200 | e->setto = xmemdupz(equals + 1, ep - equals - 1); |
515106fa | 201 | } |
7fb0eaa2 | 202 | e->attr = git_attr_internal(cp, len); |
515106fa | 203 | } |
515106fa JH |
204 | return ep + strspn(ep, blank); |
205 | } | |
206 | ||
f48fd688 JH |
207 | static struct match_attr *parse_attr_line(const char *line, const char *src, |
208 | int lineno, int macro_ok) | |
d0bfd026 JH |
209 | { |
210 | int namelen; | |
d68e1c18 | 211 | int num_attr, i; |
85c4a0d0 | 212 | const char *cp, *name, *states; |
515106fa | 213 | struct match_attr *res = NULL; |
f48fd688 | 214 | int is_macro; |
d0bfd026 JH |
215 | |
216 | cp = line + strspn(line, blank); | |
217 | if (!*cp || *cp == '#') | |
218 | return NULL; | |
219 | name = cp; | |
220 | namelen = strcspn(name, blank); | |
f48fd688 | 221 | if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen && |
59556548 | 222 | starts_with(name, ATTRIBUTE_MACRO_PREFIX)) { |
f48fd688 JH |
223 | if (!macro_ok) { |
224 | fprintf(stderr, "%s not allowed: %s:%d\n", | |
225 | name, src, lineno); | |
62af8969 | 226 | goto fail_return; |
f48fd688 JH |
227 | } |
228 | is_macro = 1; | |
229 | name += strlen(ATTRIBUTE_MACRO_PREFIX); | |
230 | name += strspn(name, blank); | |
231 | namelen = strcspn(name, blank); | |
e4aee10a JH |
232 | if (invalid_attr_name(name, namelen)) { |
233 | fprintf(stderr, | |
234 | "%.*s is not a valid attribute name: %s:%d\n", | |
235 | namelen, name, src, lineno); | |
62af8969 | 236 | goto fail_return; |
e4aee10a | 237 | } |
f48fd688 JH |
238 | } |
239 | else | |
240 | is_macro = 0; | |
d0bfd026 | 241 | |
85c4a0d0 MH |
242 | states = name + namelen; |
243 | states += strspn(states, blank); | |
244 | ||
d68e1c18 MH |
245 | /* First pass to count the attr_states */ |
246 | for (cp = states, num_attr = 0; *cp; num_attr++) { | |
247 | cp = parse_attr(src, lineno, cp, NULL); | |
248 | if (!cp) | |
62af8969 | 249 | goto fail_return; |
d0bfd026 | 250 | } |
d68e1c18 MH |
251 | |
252 | res = xcalloc(1, | |
253 | sizeof(*res) + | |
254 | sizeof(struct attr_state) * num_attr + | |
255 | (is_macro ? 0 : namelen + 1)); | |
fad32bcd | 256 | if (is_macro) { |
d68e1c18 | 257 | res->u.attr = git_attr_internal(name, namelen); |
fad32bcd NTND |
258 | res->u.attr->maybe_macro = 1; |
259 | } else { | |
82dce998 NTND |
260 | char *p = (char *)&(res->state[num_attr]); |
261 | memcpy(p, name, namelen); | |
262 | res->u.pat.pattern = p; | |
263 | parse_exclude_pattern(&res->u.pat.pattern, | |
264 | &res->u.pat.patternlen, | |
265 | &res->u.pat.flags, | |
266 | &res->u.pat.nowildcardlen); | |
8b1bd024 TR |
267 | if (res->u.pat.flags & EXC_FLAG_NEGATIVE) { |
268 | warning(_("Negative patterns are ignored in git attributes\n" | |
269 | "Use '\\!' for literal leading exclamation.")); | |
62af8969 | 270 | goto fail_return; |
8b1bd024 | 271 | } |
d0bfd026 | 272 | } |
d68e1c18 MH |
273 | res->is_macro = is_macro; |
274 | res->num_attr = num_attr; | |
275 | ||
276 | /* Second pass to fill the attr_states */ | |
277 | for (cp = states, i = 0; *cp; i++) { | |
278 | cp = parse_attr(src, lineno, cp, &(res->state[i])); | |
06a604e6 NTND |
279 | if (!is_macro) |
280 | res->state[i].attr->maybe_real = 1; | |
281 | if (res->state[i].attr->maybe_macro) | |
282 | cannot_trust_maybe_real = 1; | |
d68e1c18 MH |
283 | } |
284 | ||
d0bfd026 | 285 | return res; |
62af8969 JH |
286 | |
287 | fail_return: | |
288 | free(res); | |
289 | return NULL; | |
d0bfd026 JH |
290 | } |
291 | ||
292 | /* | |
293 | * Like info/exclude and .gitignore, the attribute information can | |
294 | * come from many places. | |
295 | * | |
296 | * (1) .gitattribute file of the same directory; | |
515106fa JH |
297 | * (2) .gitattribute file of the parent directory if (1) does not have |
298 | * any match; this goes recursively upwards, just like .gitignore. | |
299 | * (3) $GIT_DIR/info/attributes, which overrides both of the above. | |
d0bfd026 JH |
300 | * |
301 | * In the same file, later entries override the earlier match, so in the | |
302 | * global list, we would have entries from info/attributes the earliest | |
303 | * (reading the file from top to bottom), .gitattribute of the root | |
304 | * directory (again, reading the file from top to bottom) down to the | |
305 | * current directory, and then scan the list backwards to find the first match. | |
6d24e7a8 | 306 | * This is exactly the same as what is_excluded() does in dir.c to deal with |
6f416cba | 307 | * .gitignore file and info/excludes file as a fallback. |
d0bfd026 JH |
308 | */ |
309 | ||
310 | static struct attr_stack { | |
311 | struct attr_stack *prev; | |
312 | char *origin; | |
cd6a0b26 | 313 | size_t originlen; |
d0bfd026 | 314 | unsigned num_matches; |
a4413118 | 315 | unsigned alloc; |
d0bfd026 JH |
316 | struct match_attr **attrs; |
317 | } *attr_stack; | |
318 | ||
319 | static void free_attr_elem(struct attr_stack *e) | |
320 | { | |
321 | int i; | |
322 | free(e->origin); | |
515106fa JH |
323 | for (i = 0; i < e->num_matches; i++) { |
324 | struct match_attr *a = e->attrs[i]; | |
325 | int j; | |
326 | for (j = 0; j < a->num_attr; j++) { | |
a5e92abd | 327 | const char *setto = a->state[j].setto; |
515106fa JH |
328 | if (setto == ATTR__TRUE || |
329 | setto == ATTR__FALSE || | |
330 | setto == ATTR__UNSET || | |
331 | setto == ATTR__UNKNOWN) | |
332 | ; | |
333 | else | |
4b25d091 | 334 | free((char *) setto); |
515106fa JH |
335 | } |
336 | free(a); | |
337 | } | |
37475f97 | 338 | free(e->attrs); |
d0bfd026 JH |
339 | free(e); |
340 | } | |
341 | ||
342 | static const char *builtin_attr[] = { | |
155a4b71 | 343 | "[attr]binary -diff -merge -text", |
d0bfd026 JH |
344 | NULL, |
345 | }; | |
346 | ||
a4413118 JH |
347 | static void handle_attr_line(struct attr_stack *res, |
348 | const char *line, | |
349 | const char *src, | |
350 | int lineno, | |
351 | int macro_ok) | |
352 | { | |
353 | struct match_attr *a; | |
354 | ||
355 | a = parse_attr_line(line, src, lineno, macro_ok); | |
356 | if (!a) | |
357 | return; | |
3a7fa03d | 358 | ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc); |
a4413118 JH |
359 | res->attrs[res->num_matches++] = a; |
360 | } | |
361 | ||
d0bfd026 JH |
362 | static struct attr_stack *read_attr_from_array(const char **list) |
363 | { | |
364 | struct attr_stack *res; | |
365 | const char *line; | |
f48fd688 | 366 | int lineno = 0; |
d0bfd026 JH |
367 | |
368 | res = xcalloc(1, sizeof(*res)); | |
a4413118 JH |
369 | while ((line = *(list++)) != NULL) |
370 | handle_attr_line(res, line, "[builtin]", ++lineno, 1); | |
d0bfd026 JH |
371 | return res; |
372 | } | |
373 | ||
06f33c17 JH |
374 | static enum git_attr_direction direction; |
375 | static struct index_state *use_index; | |
376 | ||
f48fd688 | 377 | static struct attr_stack *read_attr_from_file(const char *path, int macro_ok) |
d0bfd026 | 378 | { |
a4413118 | 379 | FILE *fp = fopen(path, "r"); |
d0bfd026 JH |
380 | struct attr_stack *res; |
381 | char buf[2048]; | |
f48fd688 | 382 | int lineno = 0; |
d0bfd026 | 383 | |
11e50b27 | 384 | if (!fp) { |
8e950dab | 385 | if (errno != ENOENT && errno != ENOTDIR) |
55b38a48 | 386 | warn_on_inaccessible(path); |
a4413118 | 387 | return NULL; |
11e50b27 | 388 | } |
a4413118 | 389 | res = xcalloc(1, sizeof(*res)); |
27547e5f JH |
390 | while (fgets(buf, sizeof(buf), fp)) { |
391 | char *bufp = buf; | |
392 | if (!lineno) | |
393 | skip_utf8_bom(&bufp, strlen(bufp)); | |
394 | handle_attr_line(res, bufp, path, ++lineno, macro_ok); | |
395 | } | |
a4413118 JH |
396 | fclose(fp); |
397 | return res; | |
398 | } | |
d0bfd026 | 399 | |
06f33c17 | 400 | static struct attr_stack *read_attr_from_index(const char *path, int macro_ok) |
a4413118 JH |
401 | { |
402 | struct attr_stack *res; | |
1a9d7e9b JH |
403 | char *buf, *sp; |
404 | int lineno = 0; | |
f48fd688 | 405 | |
ff366825 | 406 | buf = read_blob_data_from_index(use_index ? use_index : &the_index, path, NULL); |
1a9d7e9b | 407 | if (!buf) |
06f33c17 | 408 | return NULL; |
1a9d7e9b | 409 | |
06f33c17 | 410 | res = xcalloc(1, sizeof(*res)); |
1a9d7e9b JH |
411 | for (sp = buf; *sp; ) { |
412 | char *ep; | |
413 | int more; | |
263434f2 JH |
414 | |
415 | ep = strchrnul(sp, '\n'); | |
1a9d7e9b JH |
416 | more = (*ep == '\n'); |
417 | *ep = '\0'; | |
418 | handle_attr_line(res, sp, path, ++lineno, macro_ok); | |
419 | sp = ep + more; | |
420 | } | |
421 | free(buf); | |
d0bfd026 JH |
422 | return res; |
423 | } | |
424 | ||
06f33c17 JH |
425 | static struct attr_stack *read_attr(const char *path, int macro_ok) |
426 | { | |
427 | struct attr_stack *res; | |
428 | ||
429 | if (direction == GIT_ATTR_CHECKOUT) { | |
430 | res = read_attr_from_index(path, macro_ok); | |
431 | if (!res) | |
432 | res = read_attr_from_file(path, macro_ok); | |
433 | } | |
4191e80a | 434 | else if (direction == GIT_ATTR_CHECKIN) { |
06f33c17 JH |
435 | res = read_attr_from_file(path, macro_ok); |
436 | if (!res) | |
437 | /* | |
438 | * There is no checked out .gitattributes file there, but | |
439 | * we might have it in the index. We allow operation in a | |
440 | * sparsely checked out work tree, so read from it. | |
441 | */ | |
442 | res = read_attr_from_index(path, macro_ok); | |
443 | } | |
4191e80a NTND |
444 | else |
445 | res = read_attr_from_index(path, macro_ok); | |
06f33c17 JH |
446 | if (!res) |
447 | res = xcalloc(1, sizeof(*res)); | |
448 | return res; | |
449 | } | |
450 | ||
d0bfd026 JH |
451 | #if DEBUG_ATTR |
452 | static void debug_info(const char *what, struct attr_stack *elem) | |
453 | { | |
454 | fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()"); | |
455 | } | |
cf94ccda | 456 | static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v) |
f48fd688 | 457 | { |
515106fa JH |
458 | const char *value = v; |
459 | ||
460 | if (ATTR_TRUE(value)) | |
461 | value = "set"; | |
462 | else if (ATTR_FALSE(value)) | |
463 | value = "unset"; | |
464 | else if (ATTR_UNSET(value)) | |
465 | value = "unspecified"; | |
466 | ||
467 | fprintf(stderr, "%s: %s => %s (%s)\n", | |
468 | what, attr->name, (char *) value, match); | |
f48fd688 | 469 | } |
d0bfd026 JH |
470 | #define debug_push(a) debug_info("push", (a)) |
471 | #define debug_pop(a) debug_info("pop", (a)) | |
472 | #else | |
473 | #define debug_push(a) do { ; } while (0) | |
474 | #define debug_pop(a) do { ; } while (0) | |
f48fd688 | 475 | #define debug_set(a,b,c,d) do { ; } while (0) |
034d35c9 | 476 | #endif /* DEBUG_ATTR */ |
d0bfd026 | 477 | |
06f33c17 JH |
478 | static void drop_attr_stack(void) |
479 | { | |
480 | while (attr_stack) { | |
481 | struct attr_stack *elem = attr_stack; | |
482 | attr_stack = elem->prev; | |
483 | free_attr_elem(elem); | |
484 | } | |
485 | } | |
486 | ||
c5147722 | 487 | static const char *git_etc_gitattributes(void) |
6df42ab9 PO |
488 | { |
489 | static const char *system_wide; | |
490 | if (!system_wide) | |
491 | system_wide = system_path(ETC_GITATTRIBUTES); | |
492 | return system_wide; | |
493 | } | |
494 | ||
c5147722 | 495 | static int git_attr_system(void) |
6df42ab9 PO |
496 | { |
497 | return !git_env_bool("GIT_ATTR_NOSYSTEM", 0); | |
498 | } | |
499 | ||
f932729c JK |
500 | static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE) |
501 | ||
f48fd688 JH |
502 | static void bootstrap_attr_stack(void) |
503 | { | |
909ca7b9 | 504 | struct attr_stack *elem; |
f48fd688 | 505 | |
909ca7b9 JH |
506 | if (attr_stack) |
507 | return; | |
f48fd688 | 508 | |
909ca7b9 JH |
509 | elem = read_attr_from_array(builtin_attr); |
510 | elem->origin = NULL; | |
511 | elem->prev = attr_stack; | |
512 | attr_stack = elem; | |
6df42ab9 | 513 | |
909ca7b9 JH |
514 | if (git_attr_system()) { |
515 | elem = read_attr_from_file(git_etc_gitattributes(), 1); | |
516 | if (elem) { | |
517 | elem->origin = NULL; | |
518 | elem->prev = attr_stack; | |
519 | attr_stack = elem; | |
6df42ab9 | 520 | } |
909ca7b9 | 521 | } |
6df42ab9 | 522 | |
2527bbce PT |
523 | if (!git_attributes_file) |
524 | git_attributes_file = xdg_config_home("attributes"); | |
f0c1c15c JK |
525 | if (git_attributes_file) { |
526 | elem = read_attr_from_file(git_attributes_file, 1); | |
527 | if (elem) { | |
528 | elem->origin = NULL; | |
529 | elem->prev = attr_stack; | |
530 | attr_stack = elem; | |
531 | } | |
909ca7b9 | 532 | } |
f48fd688 | 533 | |
909ca7b9 JH |
534 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
535 | elem = read_attr(GITATTRIBUTES_FILE, 1); | |
6c65b5ea | 536 | elem->origin = xstrdup(""); |
cd6a0b26 | 537 | elem->originlen = 0; |
f48fd688 JH |
538 | elem->prev = attr_stack; |
539 | attr_stack = elem; | |
909ca7b9 | 540 | debug_push(elem); |
f48fd688 | 541 | } |
909ca7b9 | 542 | |
f0056f64 JK |
543 | if (startup_info->have_repository) |
544 | elem = read_attr_from_file(git_path_info_attributes(), 1); | |
545 | else | |
546 | elem = NULL; | |
547 | ||
909ca7b9 JH |
548 | if (!elem) |
549 | elem = xcalloc(1, sizeof(*elem)); | |
550 | elem->origin = NULL; | |
551 | elem->prev = attr_stack; | |
552 | attr_stack = elem; | |
f48fd688 JH |
553 | } |
554 | ||
9db9eecf | 555 | static void prepare_attr_stack(const char *path, int dirlen) |
d0bfd026 JH |
556 | { |
557 | struct attr_stack *elem, *info; | |
9db9eecf | 558 | int len; |
a8727017 MH |
559 | const char *cp; |
560 | ||
d0bfd026 JH |
561 | /* |
562 | * At the bottom of the attribute stack is the built-in | |
6df42ab9 PO |
563 | * set of attribute definitions, followed by the contents |
564 | * of $(prefix)/etc/gitattributes and a file specified by | |
565 | * core.attributesfile. Then, contents from | |
d0bfd026 JH |
566 | * .gitattribute files from directories closer to the |
567 | * root to the ones in deeper directories are pushed | |
568 | * to the stack. Finally, at the very top of the stack | |
569 | * we always keep the contents of $GIT_DIR/info/attributes. | |
570 | * | |
571 | * When checking, we use entries from near the top of the | |
572 | * stack, preferring $GIT_DIR/info/attributes, then | |
573 | * .gitattributes in deeper directories to shallower ones, | |
574 | * and finally use the built-in set as the default. | |
575 | */ | |
7373eab4 | 576 | bootstrap_attr_stack(); |
d0bfd026 JH |
577 | |
578 | /* | |
579 | * Pop the "info" one that is always at the top of the stack. | |
580 | */ | |
581 | info = attr_stack; | |
582 | attr_stack = info->prev; | |
583 | ||
584 | /* | |
585 | * Pop the ones from directories that are not the prefix of | |
c432ef99 JH |
586 | * the path we are checking. Break out of the loop when we see |
587 | * the root one (whose origin is an empty string "") or the builtin | |
588 | * one (whose origin is NULL) without popping it. | |
d0bfd026 | 589 | */ |
77f7f822 | 590 | while (attr_stack->origin) { |
d0bfd026 JH |
591 | int namelen = strlen(attr_stack->origin); |
592 | ||
593 | elem = attr_stack; | |
594 | if (namelen <= dirlen && | |
1afca444 JK |
595 | !strncmp(elem->origin, path, namelen) && |
596 | (!namelen || path[namelen] == '/')) | |
d0bfd026 JH |
597 | break; |
598 | ||
599 | debug_pop(elem); | |
600 | attr_stack = elem->prev; | |
601 | free_attr_elem(elem); | |
602 | } | |
603 | ||
604 | /* | |
605 | * Read from parent directories and push them down | |
606 | */ | |
4191e80a | 607 | if (!is_bare_repository() || direction == GIT_ATTR_INDEX) { |
c432ef99 JH |
608 | /* |
609 | * bootstrap_attr_stack() should have added, and the | |
610 | * above loop should have stopped before popping, the | |
611 | * root element whose attr_stack->origin is set to an | |
612 | * empty string. | |
613 | */ | |
97410b27 | 614 | struct strbuf pathbuf = STRBUF_INIT; |
2d35d556 | 615 | |
c432ef99 | 616 | assert(attr_stack->origin); |
97410b27 | 617 | while (1) { |
2d35d556 RS |
618 | len = strlen(attr_stack->origin); |
619 | if (dirlen <= len) | |
620 | break; | |
97410b27 BC |
621 | cp = memchr(path + len + 1, '/', dirlen - len - 1); |
622 | if (!cp) | |
623 | cp = path + dirlen; | |
624 | strbuf_add(&pathbuf, path, cp - path); | |
f66cf96d | 625 | strbuf_addch(&pathbuf, '/'); |
97410b27 | 626 | strbuf_addstr(&pathbuf, GITATTRIBUTES_FILE); |
f66cf96d | 627 | elem = read_attr(pathbuf.buf, 0); |
97410b27 | 628 | strbuf_setlen(&pathbuf, cp - path); |
cd6a0b26 | 629 | elem->origin = strbuf_detach(&pathbuf, &elem->originlen); |
2d35d556 RS |
630 | elem->prev = attr_stack; |
631 | attr_stack = elem; | |
632 | debug_push(elem); | |
633 | } | |
d0bfd026 | 634 | |
97410b27 BC |
635 | strbuf_release(&pathbuf); |
636 | } | |
d4c98565 | 637 | |
d0bfd026 JH |
638 | /* |
639 | * Finally push the "info" one at the top of the stack. | |
640 | */ | |
641 | info->prev = attr_stack; | |
642 | attr_stack = info; | |
643 | } | |
644 | ||
645 | static int path_matches(const char *pathname, int pathlen, | |
bd2f371d | 646 | int basename_offset, |
82dce998 | 647 | const struct pattern *pat, |
d0bfd026 JH |
648 | const char *base, int baselen) |
649 | { | |
82dce998 NTND |
650 | const char *pattern = pat->pattern; |
651 | int prefix = pat->nowildcardlen; | |
dc09e9ec | 652 | int isdir = (pathlen && pathname[pathlen - 1] == '/'); |
82dce998 | 653 | |
dc09e9ec | 654 | if ((pat->flags & EXC_FLAG_MUSTBEDIR) && !isdir) |
94bc671a JNA |
655 | return 0; |
656 | ||
82dce998 | 657 | if (pat->flags & EXC_FLAG_NODIR) { |
bd2f371d | 658 | return match_basename(pathname + basename_offset, |
dc09e9ec | 659 | pathlen - basename_offset - isdir, |
82dce998 NTND |
660 | pattern, prefix, |
661 | pat->patternlen, pat->flags); | |
d0bfd026 | 662 | } |
dc09e9ec | 663 | return match_pathname(pathname, pathlen - isdir, |
82dce998 NTND |
664 | base, baselen, |
665 | pattern, prefix, pat->patternlen, pat->flags); | |
d0bfd026 JH |
666 | } |
667 | ||
ec775c41 HG |
668 | static int macroexpand_one(int attr_nr, int rem); |
669 | ||
515106fa JH |
670 | static int fill_one(const char *what, struct match_attr *a, int rem) |
671 | { | |
672 | struct git_attr_check *check = check_all_attr; | |
673 | int i; | |
674 | ||
969f9d73 | 675 | for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) { |
515106fa | 676 | struct git_attr *attr = a->state[i].attr; |
a5e92abd JH |
677 | const char **n = &(check[attr->attr_nr].value); |
678 | const char *v = a->state[i].setto; | |
515106fa JH |
679 | |
680 | if (*n == ATTR__UNKNOWN) { | |
426c27b7 | 681 | debug_set(what, |
712efb1a | 682 | a->is_macro ? a->u.attr->name : a->u.pat.pattern, |
426c27b7 | 683 | attr, v); |
515106fa JH |
684 | *n = v; |
685 | rem--; | |
ec775c41 | 686 | rem = macroexpand_one(attr->attr_nr, rem); |
515106fa JH |
687 | } |
688 | } | |
689 | return rem; | |
690 | } | |
691 | ||
bd2f371d | 692 | static int fill(const char *path, int pathlen, int basename_offset, |
4742d136 | 693 | struct attr_stack *stk, int rem) |
d0bfd026 | 694 | { |
515106fa | 695 | int i; |
d0bfd026 JH |
696 | const char *base = stk->origin ? stk->origin : ""; |
697 | ||
698 | for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) { | |
699 | struct match_attr *a = stk->attrs[i]; | |
f48fd688 JH |
700 | if (a->is_macro) |
701 | continue; | |
bd2f371d | 702 | if (path_matches(path, pathlen, basename_offset, |
82dce998 | 703 | &a->u.pat, base, stk->originlen)) |
515106fa | 704 | rem = fill_one("fill", a, rem); |
d0bfd026 JH |
705 | } |
706 | return rem; | |
707 | } | |
708 | ||
aa7710e0 | 709 | static int macroexpand_one(int nr, int rem) |
f48fd688 | 710 | { |
ec775c41 | 711 | struct attr_stack *stk; |
515106fa | 712 | int i; |
f48fd688 | 713 | |
fad32bcd NTND |
714 | if (check_all_attr[nr].value != ATTR__TRUE || |
715 | !check_all_attr[nr].attr->maybe_macro) | |
ec775c41 HG |
716 | return rem; |
717 | ||
4b0c6961 JH |
718 | for (stk = attr_stack; stk; stk = stk->prev) { |
719 | for (i = stk->num_matches - 1; 0 <= i; i--) { | |
ec775c41 HG |
720 | struct match_attr *ma = stk->attrs[i]; |
721 | if (!ma->is_macro) | |
722 | continue; | |
aa7710e0 | 723 | if (ma->u.attr->attr_nr == nr) |
4b0c6961 | 724 | return fill_one("expand", ma, rem); |
ec775c41 | 725 | } |
4b0c6961 | 726 | } |
ec775c41 | 727 | |
f48fd688 JH |
728 | return rem; |
729 | } | |
730 | ||
2d721744 | 731 | /* |
06a604e6 NTND |
732 | * Collect attributes for path into the array pointed to by |
733 | * check_all_attr. If num is non-zero, only attributes in check[] are | |
734 | * collected. Otherwise all attributes are collected. | |
2d721744 | 735 | */ |
06a604e6 NTND |
736 | static void collect_some_attrs(const char *path, int num, |
737 | struct git_attr_check *check) | |
738 | ||
d0bfd026 JH |
739 | { |
740 | struct attr_stack *stk; | |
9db9eecf | 741 | int i, pathlen, rem, dirlen; |
bd2f371d JH |
742 | const char *cp, *last_slash = NULL; |
743 | int basename_offset; | |
9db9eecf NTND |
744 | |
745 | for (cp = path; *cp; cp++) { | |
746 | if (*cp == '/' && cp[1]) | |
747 | last_slash = cp; | |
748 | } | |
749 | pathlen = cp - path; | |
750 | if (last_slash) { | |
bd2f371d | 751 | basename_offset = last_slash + 1 - path; |
9db9eecf NTND |
752 | dirlen = last_slash - path; |
753 | } else { | |
bd2f371d | 754 | basename_offset = 0; |
9db9eecf NTND |
755 | dirlen = 0; |
756 | } | |
d0bfd026 | 757 | |
9db9eecf | 758 | prepare_attr_stack(path, dirlen); |
f48fd688 | 759 | for (i = 0; i < attr_nr; i++) |
515106fa | 760 | check_all_attr[i].value = ATTR__UNKNOWN; |
06a604e6 NTND |
761 | if (num && !cannot_trust_maybe_real) { |
762 | rem = 0; | |
763 | for (i = 0; i < num; i++) { | |
764 | if (!check[i].attr->maybe_real) { | |
765 | struct git_attr_check *c; | |
766 | c = check_all_attr + check[i].attr->attr_nr; | |
767 | c->value = ATTR__UNSET; | |
768 | rem++; | |
769 | } | |
770 | } | |
771 | if (rem == num) | |
772 | return; | |
773 | } | |
d0bfd026 | 774 | |
f48fd688 JH |
775 | rem = attr_nr; |
776 | for (stk = attr_stack; 0 < rem && stk; stk = stk->prev) | |
bd2f371d | 777 | rem = fill(path, pathlen, basename_offset, stk, rem); |
2d721744 MH |
778 | } |
779 | ||
d932f4eb | 780 | int git_check_attr(const char *path, int num, struct git_attr_check *check) |
2d721744 MH |
781 | { |
782 | int i; | |
783 | ||
06a604e6 | 784 | collect_some_attrs(path, num, check); |
f48fd688 | 785 | |
515106fa | 786 | for (i = 0; i < num; i++) { |
a5e92abd | 787 | const char *value = check_all_attr[check[i].attr->attr_nr].value; |
515106fa JH |
788 | if (value == ATTR__UNKNOWN) |
789 | value = ATTR__UNSET; | |
790 | check[i].value = value; | |
791 | } | |
f48fd688 | 792 | |
d0bfd026 JH |
793 | return 0; |
794 | } | |
06f33c17 | 795 | |
ee548df3 MH |
796 | int git_all_attrs(const char *path, int *num, struct git_attr_check **check) |
797 | { | |
798 | int i, count, j; | |
799 | ||
06a604e6 | 800 | collect_some_attrs(path, 0, NULL); |
ee548df3 MH |
801 | |
802 | /* Count the number of attributes that are set. */ | |
803 | count = 0; | |
804 | for (i = 0; i < attr_nr; i++) { | |
805 | const char *value = check_all_attr[i].value; | |
806 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) | |
807 | ++count; | |
808 | } | |
809 | *num = count; | |
b32fa95f | 810 | ALLOC_ARRAY(*check, count); |
ee548df3 MH |
811 | j = 0; |
812 | for (i = 0; i < attr_nr; i++) { | |
813 | const char *value = check_all_attr[i].value; | |
814 | if (value != ATTR__UNSET && value != ATTR__UNKNOWN) { | |
815 | (*check)[j].attr = check_all_attr[i].attr; | |
816 | (*check)[j].value = value; | |
817 | ++j; | |
818 | } | |
819 | } | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
06f33c17 JH |
824 | void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate) |
825 | { | |
826 | enum git_attr_direction old = direction; | |
4191e80a NTND |
827 | |
828 | if (is_bare_repository() && new != GIT_ATTR_INDEX) | |
829 | die("BUG: non-INDEX attr direction in a bare repo"); | |
830 | ||
06f33c17 JH |
831 | direction = new; |
832 | if (new != old) | |
833 | drop_attr_stack(); | |
834 | use_index = istate; | |
835 | } |