gitignore: make pattern parsing code a separate function
[git/git.git] / attr.c
CommitLineData
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
16const char git_attr__true[] = "(builtin)true";
17const char git_attr__false[] = "\0(builtin)false";
18static 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
31struct git_attr {
32 struct git_attr *next;
33 unsigned h;
f48fd688 34 int attr_nr;
d0bfd026
JH
35 char name[FLEX_ARRAY];
36};
f48fd688 37static int attr_nr;
d0bfd026 38
f48fd688 39static struct git_attr_check *check_all_attr;
d0bfd026
JH
40static struct git_attr *(git_attr_hash[HASHSIZE]);
41
352404ac
MH
42char *git_attr_name(struct git_attr *attr)
43{
44 return attr->name;
45}
46
d0bfd026
JH
47static 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
58static 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 77static 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
107struct 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 113struct attr_state {
d0bfd026 114 struct git_attr *attr;
a5e92abd 115 const char *setto;
d0bfd026
JH
116};
117
ba845b75
MH
118/*
119 * One rule, as from a .gitattributes file.
120 *
121 * If is_macro is true, then u.attr is a pointer to the git_attr being
122 * defined.
123 *
124 * If is_macro is false, then u.pattern points at the filename pattern
125 * to which the rule applies. (The memory pointed to is part of the
126 * memory block allocated for the match_attr instance.)
127 *
128 * In either case, num_attr is the number of attributes affected by
129 * this rule, and state is an array listing them. The attributes are
130 * listed as they appear in the file (macros unexpanded).
131 */
d0bfd026 132struct match_attr {
f48fd688
JH
133 union {
134 char *pattern;
135 struct git_attr *attr;
136 } u;
137 char is_macro;
d0bfd026
JH
138 unsigned num_attr;
139 struct attr_state state[FLEX_ARRAY];
140};
141
142static const char blank[] = " \t\r\n";
143
d1751298
MH
144/*
145 * Parse a whitespace-delimited attribute state (i.e., "attr",
146 * "-attr", "!attr", or "attr=value") from the string starting at src.
147 * If e is not NULL, write the results to *e. Return a pointer to the
148 * remainder of the string (with leading whitespace removed), or NULL
149 * if there was an error.
150 */
515106fa 151static const char *parse_attr(const char *src, int lineno, const char *cp,
d1751298 152 struct attr_state *e)
515106fa
JH
153{
154 const char *ep, *equals;
155 int len;
156
157 ep = cp + strcspn(cp, blank);
158 equals = strchr(cp, '=');
159 if (equals && ep < equals)
160 equals = NULL;
161 if (equals)
162 len = equals - cp;
163 else
164 len = ep - cp;
d1751298 165 if (!e) {
515106fa
JH
166 if (*cp == '-' || *cp == '!') {
167 cp++;
168 len--;
169 }
170 if (invalid_attr_name(cp, len)) {
171 fprintf(stderr,
172 "%.*s is not a valid attribute name: %s:%d\n",
173 len, cp, src, lineno);
174 return NULL;
175 }
176 } else {
515106fa
JH
177 if (*cp == '-' || *cp == '!') {
178 e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;
179 cp++;
180 len--;
181 }
182 else if (!equals)
183 e->setto = ATTR__TRUE;
184 else {
182af834 185 e->setto = xmemdupz(equals + 1, ep - equals - 1);
515106fa 186 }
7fb0eaa2 187 e->attr = git_attr_internal(cp, len);
515106fa 188 }
515106fa
JH
189 return ep + strspn(ep, blank);
190}
191
f48fd688
JH
192static struct match_attr *parse_attr_line(const char *line, const char *src,
193 int lineno, int macro_ok)
d0bfd026
JH
194{
195 int namelen;
d68e1c18 196 int num_attr, i;
85c4a0d0 197 const char *cp, *name, *states;
515106fa 198 struct match_attr *res = NULL;
f48fd688 199 int is_macro;
d0bfd026
JH
200
201 cp = line + strspn(line, blank);
202 if (!*cp || *cp == '#')
203 return NULL;
204 name = cp;
205 namelen = strcspn(name, blank);
f48fd688
JH
206 if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
207 !prefixcmp(name, ATTRIBUTE_MACRO_PREFIX)) {
208 if (!macro_ok) {
209 fprintf(stderr, "%s not allowed: %s:%d\n",
210 name, src, lineno);
211 return NULL;
212 }
213 is_macro = 1;
214 name += strlen(ATTRIBUTE_MACRO_PREFIX);
215 name += strspn(name, blank);
216 namelen = strcspn(name, blank);
e4aee10a
JH
217 if (invalid_attr_name(name, namelen)) {
218 fprintf(stderr,
219 "%.*s is not a valid attribute name: %s:%d\n",
220 namelen, name, src, lineno);
221 return NULL;
222 }
f48fd688
JH
223 }
224 else
225 is_macro = 0;
d0bfd026 226
85c4a0d0
MH
227 states = name + namelen;
228 states += strspn(states, blank);
229
d68e1c18
MH
230 /* First pass to count the attr_states */
231 for (cp = states, num_attr = 0; *cp; num_attr++) {
232 cp = parse_attr(src, lineno, cp, NULL);
233 if (!cp)
234 return NULL;
d0bfd026 235 }
d68e1c18
MH
236
237 res = xcalloc(1,
238 sizeof(*res) +
239 sizeof(struct attr_state) * num_attr +
240 (is_macro ? 0 : namelen + 1));
241 if (is_macro)
242 res->u.attr = git_attr_internal(name, namelen);
243 else {
244 res->u.pattern = (char *)&(res->state[num_attr]);
245 memcpy(res->u.pattern, name, namelen);
246 res->u.pattern[namelen] = 0;
d0bfd026 247 }
d68e1c18
MH
248 res->is_macro = is_macro;
249 res->num_attr = num_attr;
250
251 /* Second pass to fill the attr_states */
252 for (cp = states, i = 0; *cp; i++) {
253 cp = parse_attr(src, lineno, cp, &(res->state[i]));
254 }
255
d0bfd026
JH
256 return res;
257}
258
259/*
260 * Like info/exclude and .gitignore, the attribute information can
261 * come from many places.
262 *
263 * (1) .gitattribute file of the same directory;
515106fa
JH
264 * (2) .gitattribute file of the parent directory if (1) does not have
265 * any match; this goes recursively upwards, just like .gitignore.
266 * (3) $GIT_DIR/info/attributes, which overrides both of the above.
d0bfd026
JH
267 *
268 * In the same file, later entries override the earlier match, so in the
269 * global list, we would have entries from info/attributes the earliest
270 * (reading the file from top to bottom), .gitattribute of the root
271 * directory (again, reading the file from top to bottom) down to the
272 * current directory, and then scan the list backwards to find the first match.
273 * This is exactly the same as what excluded() does in dir.c to deal with
274 * .gitignore
275 */
276
277static struct attr_stack {
278 struct attr_stack *prev;
279 char *origin;
cd6a0b26 280 size_t originlen;
d0bfd026 281 unsigned num_matches;
a4413118 282 unsigned alloc;
d0bfd026
JH
283 struct match_attr **attrs;
284} *attr_stack;
285
286static void free_attr_elem(struct attr_stack *e)
287{
288 int i;
289 free(e->origin);
515106fa
JH
290 for (i = 0; i < e->num_matches; i++) {
291 struct match_attr *a = e->attrs[i];
292 int j;
293 for (j = 0; j < a->num_attr; j++) {
a5e92abd 294 const char *setto = a->state[j].setto;
515106fa
JH
295 if (setto == ATTR__TRUE ||
296 setto == ATTR__FALSE ||
297 setto == ATTR__UNSET ||
298 setto == ATTR__UNKNOWN)
299 ;
300 else
4b25d091 301 free((char *) setto);
515106fa
JH
302 }
303 free(a);
304 }
37475f97 305 free(e->attrs);
d0bfd026
JH
306 free(e);
307}
308
309static const char *builtin_attr[] = {
5ec3e670 310 "[attr]binary -diff -text",
d0bfd026
JH
311 NULL,
312};
313
a4413118
JH
314static void handle_attr_line(struct attr_stack *res,
315 const char *line,
316 const char *src,
317 int lineno,
318 int macro_ok)
319{
320 struct match_attr *a;
321
322 a = parse_attr_line(line, src, lineno, macro_ok);
323 if (!a)
324 return;
325 if (res->alloc <= res->num_matches) {
326 res->alloc = alloc_nr(res->num_matches);
327 res->attrs = xrealloc(res->attrs,
328 sizeof(struct match_attr *) *
329 res->alloc);
330 }
331 res->attrs[res->num_matches++] = a;
332}
333
d0bfd026
JH
334static struct attr_stack *read_attr_from_array(const char **list)
335{
336 struct attr_stack *res;
337 const char *line;
f48fd688 338 int lineno = 0;
d0bfd026
JH
339
340 res = xcalloc(1, sizeof(*res));
a4413118
JH
341 while ((line = *(list++)) != NULL)
342 handle_attr_line(res, line, "[builtin]", ++lineno, 1);
d0bfd026
JH
343 return res;
344}
345
06f33c17
JH
346static enum git_attr_direction direction;
347static struct index_state *use_index;
348
f48fd688 349static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
d0bfd026 350{
a4413118 351 FILE *fp = fopen(path, "r");
d0bfd026
JH
352 struct attr_stack *res;
353 char buf[2048];
f48fd688 354 int lineno = 0;
d0bfd026 355
d0bfd026 356 if (!fp)
a4413118
JH
357 return NULL;
358 res = xcalloc(1, sizeof(*res));
359 while (fgets(buf, sizeof(buf), fp))
360 handle_attr_line(res, buf, path, ++lineno, macro_ok);
361 fclose(fp);
362 return res;
363}
d0bfd026 364
1a9d7e9b
JH
365static void *read_index_data(const char *path)
366{
367 int pos, len;
368 unsigned long sz;
369 enum object_type type;
370 void *data;
06f33c17 371 struct index_state *istate = use_index ? use_index : &the_index;
1a9d7e9b
JH
372
373 len = strlen(path);
06f33c17 374 pos = index_name_pos(istate, path, len);
1a9d7e9b
JH
375 if (pos < 0) {
376 /*
377 * We might be in the middle of a merge, in which
378 * case we would read stage #2 (ours).
379 */
380 int i;
381 for (i = -pos - 1;
06f33c17
JH
382 (pos < 0 && i < istate->cache_nr &&
383 !strcmp(istate->cache[i]->name, path));
1a9d7e9b 384 i++)
06f33c17 385 if (ce_stage(istate->cache[i]) == 2)
1a9d7e9b
JH
386 pos = i;
387 }
388 if (pos < 0)
389 return NULL;
06f33c17 390 data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz);
1a9d7e9b
JH
391 if (!data || type != OBJ_BLOB) {
392 free(data);
393 return NULL;
394 }
395 return data;
396}
397
06f33c17 398static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
a4413118
JH
399{
400 struct attr_stack *res;
1a9d7e9b
JH
401 char *buf, *sp;
402 int lineno = 0;
f48fd688 403
1a9d7e9b
JH
404 buf = read_index_data(path);
405 if (!buf)
06f33c17 406 return NULL;
1a9d7e9b 407
06f33c17 408 res = xcalloc(1, sizeof(*res));
1a9d7e9b
JH
409 for (sp = buf; *sp; ) {
410 char *ep;
411 int more;
412 for (ep = sp; *ep && *ep != '\n'; ep++)
413 ;
414 more = (*ep == '\n');
415 *ep = '\0';
416 handle_attr_line(res, sp, path, ++lineno, macro_ok);
417 sp = ep + more;
418 }
419 free(buf);
d0bfd026
JH
420 return res;
421}
422
06f33c17
JH
423static struct attr_stack *read_attr(const char *path, int macro_ok)
424{
425 struct attr_stack *res;
426
427 if (direction == GIT_ATTR_CHECKOUT) {
428 res = read_attr_from_index(path, macro_ok);
429 if (!res)
430 res = read_attr_from_file(path, macro_ok);
431 }
4191e80a 432 else if (direction == GIT_ATTR_CHECKIN) {
06f33c17
JH
433 res = read_attr_from_file(path, macro_ok);
434 if (!res)
435 /*
436 * There is no checked out .gitattributes file there, but
437 * we might have it in the index. We allow operation in a
438 * sparsely checked out work tree, so read from it.
439 */
440 res = read_attr_from_index(path, macro_ok);
441 }
4191e80a
NTND
442 else
443 res = read_attr_from_index(path, macro_ok);
06f33c17
JH
444 if (!res)
445 res = xcalloc(1, sizeof(*res));
446 return res;
447}
448
d0bfd026
JH
449#if DEBUG_ATTR
450static void debug_info(const char *what, struct attr_stack *elem)
451{
452 fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()");
453}
cf94ccda 454static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v)
f48fd688 455{
515106fa
JH
456 const char *value = v;
457
458 if (ATTR_TRUE(value))
459 value = "set";
460 else if (ATTR_FALSE(value))
461 value = "unset";
462 else if (ATTR_UNSET(value))
463 value = "unspecified";
464
465 fprintf(stderr, "%s: %s => %s (%s)\n",
466 what, attr->name, (char *) value, match);
f48fd688 467}
d0bfd026
JH
468#define debug_push(a) debug_info("push", (a))
469#define debug_pop(a) debug_info("pop", (a))
470#else
471#define debug_push(a) do { ; } while (0)
472#define debug_pop(a) do { ; } while (0)
f48fd688 473#define debug_set(a,b,c,d) do { ; } while (0)
d0bfd026
JH
474#endif
475
06f33c17
JH
476static void drop_attr_stack(void)
477{
478 while (attr_stack) {
479 struct attr_stack *elem = attr_stack;
480 attr_stack = elem->prev;
481 free_attr_elem(elem);
482 }
483}
484
c5147722 485static const char *git_etc_gitattributes(void)
6df42ab9
PO
486{
487 static const char *system_wide;
488 if (!system_wide)
489 system_wide = system_path(ETC_GITATTRIBUTES);
490 return system_wide;
491}
492
c5147722 493static int git_attr_system(void)
6df42ab9
PO
494{
495 return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
496}
497
f48fd688
JH
498static void bootstrap_attr_stack(void)
499{
909ca7b9 500 struct attr_stack *elem;
f48fd688 501
909ca7b9
JH
502 if (attr_stack)
503 return;
f48fd688 504
909ca7b9
JH
505 elem = read_attr_from_array(builtin_attr);
506 elem->origin = NULL;
507 elem->prev = attr_stack;
508 attr_stack = elem;
6df42ab9 509
909ca7b9
JH
510 if (git_attr_system()) {
511 elem = read_attr_from_file(git_etc_gitattributes(), 1);
512 if (elem) {
513 elem->origin = NULL;
514 elem->prev = attr_stack;
515 attr_stack = elem;
6df42ab9 516 }
909ca7b9 517 }
6df42ab9 518
6c65b5ea
JH
519 if (git_attributes_file) {
520 elem = read_attr_from_file(git_attributes_file, 1);
909ca7b9
JH
521 if (elem) {
522 elem->origin = NULL;
2d35d556
RS
523 elem->prev = attr_stack;
524 attr_stack = elem;
2d35d556 525 }
909ca7b9 526 }
f48fd688 527
909ca7b9
JH
528 if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
529 elem = read_attr(GITATTRIBUTES_FILE, 1);
6c65b5ea 530 elem->origin = xstrdup("");
cd6a0b26 531 elem->originlen = 0;
f48fd688
JH
532 elem->prev = attr_stack;
533 attr_stack = elem;
909ca7b9 534 debug_push(elem);
f48fd688 535 }
909ca7b9
JH
536
537 elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1);
538 if (!elem)
539 elem = xcalloc(1, sizeof(*elem));
540 elem->origin = NULL;
541 elem->prev = attr_stack;
542 attr_stack = elem;
f48fd688
JH
543}
544
a8727017 545static void prepare_attr_stack(const char *path)
d0bfd026
JH
546{
547 struct attr_stack *elem, *info;
a8727017 548 int dirlen, len;
a8727017
MH
549 const char *cp;
550
551 cp = strrchr(path, '/');
552 if (!cp)
553 dirlen = 0;
554 else
555 dirlen = cp - path;
f66cf96d 556
d0bfd026
JH
557 /*
558 * At the bottom of the attribute stack is the built-in
6df42ab9
PO
559 * set of attribute definitions, followed by the contents
560 * of $(prefix)/etc/gitattributes and a file specified by
561 * core.attributesfile. Then, contents from
d0bfd026
JH
562 * .gitattribute files from directories closer to the
563 * root to the ones in deeper directories are pushed
564 * to the stack. Finally, at the very top of the stack
565 * we always keep the contents of $GIT_DIR/info/attributes.
566 *
567 * When checking, we use entries from near the top of the
568 * stack, preferring $GIT_DIR/info/attributes, then
569 * .gitattributes in deeper directories to shallower ones,
570 * and finally use the built-in set as the default.
571 */
7373eab4 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
c432ef99
JH
582 * the path we are checking. Break out of the loop when we see
583 * the root one (whose origin is an empty string "") or the builtin
584 * one (whose origin is NULL) without popping it.
d0bfd026 585 */
77f7f822 586 while (attr_stack->origin) {
d0bfd026
JH
587 int namelen = strlen(attr_stack->origin);
588
589 elem = attr_stack;
590 if (namelen <= dirlen &&
1afca444
JK
591 !strncmp(elem->origin, path, namelen) &&
592 (!namelen || path[namelen] == '/'))
d0bfd026
JH
593 break;
594
595 debug_pop(elem);
596 attr_stack = elem->prev;
597 free_attr_elem(elem);
598 }
599
600 /*
601 * Read from parent directories and push them down
602 */
4191e80a 603 if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
c432ef99
JH
604 /*
605 * bootstrap_attr_stack() should have added, and the
606 * above loop should have stopped before popping, the
607 * root element whose attr_stack->origin is set to an
608 * empty string.
609 */
97410b27 610 struct strbuf pathbuf = STRBUF_INIT;
2d35d556 611
c432ef99 612 assert(attr_stack->origin);
97410b27 613 while (1) {
2d35d556
RS
614 len = strlen(attr_stack->origin);
615 if (dirlen <= len)
616 break;
97410b27
BC
617 cp = memchr(path + len + 1, '/', dirlen - len - 1);
618 if (!cp)
619 cp = path + dirlen;
620 strbuf_add(&pathbuf, path, cp - path);
f66cf96d 621 strbuf_addch(&pathbuf, '/');
97410b27 622 strbuf_addstr(&pathbuf, GITATTRIBUTES_FILE);
f66cf96d 623 elem = read_attr(pathbuf.buf, 0);
97410b27 624 strbuf_setlen(&pathbuf, cp - path);
cd6a0b26 625 elem->origin = strbuf_detach(&pathbuf, &elem->originlen);
2d35d556
RS
626 elem->prev = attr_stack;
627 attr_stack = elem;
628 debug_push(elem);
629 }
d0bfd026 630
97410b27
BC
631 strbuf_release(&pathbuf);
632 }
d4c98565 633
d0bfd026
JH
634 /*
635 * Finally push the "info" one at the top of the stack.
636 */
637 info->prev = attr_stack;
638 attr_stack = info;
639}
640
641static int path_matches(const char *pathname, int pathlen,
4742d136 642 const char *basename,
d0bfd026
JH
643 const char *pattern,
644 const char *base, int baselen)
645{
646 if (!strchr(pattern, '/')) {
6eba6210 647 return (fnmatch_icase(pattern, basename, 0) == 0);
d0bfd026
JH
648 }
649 /*
650 * match with FNM_PATHNAME; the pattern has base implicitly
651 * in front of it.
652 */
653 if (*pattern == '/')
654 pattern++;
655 if (pathlen < baselen ||
cf94ccda 656 (baselen && pathname[baselen] != '/') ||
d0bfd026
JH
657 strncmp(pathname, base, baselen))
658 return 0;
82881b38
MO
659 if (baselen != 0)
660 baselen++;
6eba6210 661 return fnmatch_icase(pattern, pathname + baselen, FNM_PATHNAME) == 0;
d0bfd026
JH
662}
663
ec775c41
HG
664static int macroexpand_one(int attr_nr, int rem);
665
515106fa
JH
666static int fill_one(const char *what, struct match_attr *a, int rem)
667{
668 struct git_attr_check *check = check_all_attr;
669 int i;
670
969f9d73 671 for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) {
515106fa 672 struct git_attr *attr = a->state[i].attr;
a5e92abd
JH
673 const char **n = &(check[attr->attr_nr].value);
674 const char *v = a->state[i].setto;
515106fa
JH
675
676 if (*n == ATTR__UNKNOWN) {
426c27b7
HG
677 debug_set(what,
678 a->is_macro ? a->u.attr->name : a->u.pattern,
679 attr, v);
515106fa
JH
680 *n = v;
681 rem--;
ec775c41 682 rem = macroexpand_one(attr->attr_nr, rem);
515106fa
JH
683 }
684 }
685 return rem;
686}
687
4742d136
NTND
688static int fill(const char *path, int pathlen, const char *basename,
689 struct attr_stack *stk, int rem)
d0bfd026 690{
515106fa 691 int i;
d0bfd026
JH
692 const char *base = stk->origin ? stk->origin : "";
693
694 for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) {
695 struct match_attr *a = stk->attrs[i];
f48fd688
JH
696 if (a->is_macro)
697 continue;
4742d136 698 if (path_matches(path, pathlen, basename,
cd6a0b26 699 a->u.pattern, base, stk->originlen))
515106fa 700 rem = fill_one("fill", a, rem);
d0bfd026
JH
701 }
702 return rem;
703}
704
ec775c41 705static int macroexpand_one(int attr_nr, int rem)
f48fd688 706{
ec775c41
HG
707 struct attr_stack *stk;
708 struct match_attr *a = NULL;
515106fa 709 int i;
f48fd688 710
ec775c41
HG
711 if (check_all_attr[attr_nr].value != ATTR__TRUE)
712 return rem;
713
714 for (stk = attr_stack; !a && stk; stk = stk->prev)
715 for (i = stk->num_matches - 1; !a && 0 <= i; i--) {
716 struct match_attr *ma = stk->attrs[i];
717 if (!ma->is_macro)
718 continue;
719 if (ma->u.attr->attr_nr == attr_nr)
720 a = ma;
721 }
722
723 if (a)
515106fa 724 rem = fill_one("expand", a, rem);
ec775c41 725
f48fd688
JH
726 return rem;
727}
728
2d721744
MH
729/*
730 * Collect all attributes for path into the array pointed to by
731 * check_all_attr.
732 */
733static void collect_all_attrs(const char *path)
d0bfd026
JH
734{
735 struct attr_stack *stk;
2d721744 736 int i, pathlen, rem;
4742d136 737 const char *basename;
d0bfd026 738
2d721744 739 prepare_attr_stack(path);
f48fd688 740 for (i = 0; i < attr_nr; i++)
515106fa 741 check_all_attr[i].value = ATTR__UNKNOWN;
d0bfd026 742
4742d136
NTND
743 basename = strrchr(path, '/');
744 basename = basename ? basename + 1 : path;
745
d0bfd026 746 pathlen = strlen(path);
f48fd688
JH
747 rem = attr_nr;
748 for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
4742d136 749 rem = fill(path, pathlen, basename, stk, rem);
2d721744
MH
750}
751
d932f4eb 752int git_check_attr(const char *path, int num, struct git_attr_check *check)
2d721744
MH
753{
754 int i;
755
756 collect_all_attrs(path);
f48fd688 757
515106fa 758 for (i = 0; i < num; i++) {
a5e92abd 759 const char *value = check_all_attr[check[i].attr->attr_nr].value;
515106fa
JH
760 if (value == ATTR__UNKNOWN)
761 value = ATTR__UNSET;
762 check[i].value = value;
763 }
f48fd688 764
d0bfd026
JH
765 return 0;
766}
06f33c17 767
ee548df3
MH
768int git_all_attrs(const char *path, int *num, struct git_attr_check **check)
769{
770 int i, count, j;
771
772 collect_all_attrs(path);
773
774 /* Count the number of attributes that are set. */
775 count = 0;
776 for (i = 0; i < attr_nr; i++) {
777 const char *value = check_all_attr[i].value;
778 if (value != ATTR__UNSET && value != ATTR__UNKNOWN)
779 ++count;
780 }
781 *num = count;
782 *check = xmalloc(sizeof(**check) * count);
783 j = 0;
784 for (i = 0; i < attr_nr; i++) {
785 const char *value = check_all_attr[i].value;
786 if (value != ATTR__UNSET && value != ATTR__UNKNOWN) {
787 (*check)[j].attr = check_all_attr[i].attr;
788 (*check)[j].value = value;
789 ++j;
790 }
791 }
792
793 return 0;
794}
795
06f33c17
JH
796void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate)
797{
798 enum git_attr_direction old = direction;
4191e80a
NTND
799
800 if (is_bare_repository() && new != GIT_ATTR_INDEX)
801 die("BUG: non-INDEX attr direction in a bare repo");
802
06f33c17
JH
803 direction = new;
804 if (new != old)
805 drop_attr_stack();
806 use_index = istate;
807}