Increment num_attr in parse_attr_line(), not parse_attr()
[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
JH
13#include "attr.h"
14
a5e92abd
JH
15const char git_attr__true[] = "(builtin)true";
16const char git_attr__false[] = "\0(builtin)false";
17static 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
23static 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
32struct git_attr {
33 struct git_attr *next;
34 unsigned h;
f48fd688 35 int attr_nr;
d0bfd026
JH
36 char name[FLEX_ARRAY];
37};
f48fd688 38static int attr_nr;
d0bfd026 39
f48fd688 40static struct git_attr_check *check_all_attr;
d0bfd026
JH
41static struct git_attr *(git_attr_hash[HASHSIZE]);
42
43static 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
54static 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 75static 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
105struct 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 111struct 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 130struct 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
140static const char blank[] = " \t\r\n";
141
515106fa 142static const char *parse_attr(const char *src, int lineno, const char *cp,
4c7517c9 143 int num_attr, struct match_attr *res)
515106fa
JH
144{
145 const char *ep, *equals;
146 int len;
147
148 ep = cp + strcspn(cp, blank);
149 equals = strchr(cp, '=');
150 if (equals && ep < equals)
151 equals = NULL;
152 if (equals)
153 len = equals - cp;
154 else
155 len = ep - cp;
156 if (!res) {
157 if (*cp == '-' || *cp == '!') {
158 cp++;
159 len--;
160 }
161 if (invalid_attr_name(cp, len)) {
162 fprintf(stderr,
163 "%.*s is not a valid attribute name: %s:%d\n",
164 len, cp, src, lineno);
165 return NULL;
166 }
167 } else {
168 struct attr_state *e;
169
4c7517c9 170 e = &(res->state[num_attr]);
515106fa
JH
171 if (*cp == '-' || *cp == '!') {
172 e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;
173 cp++;
174 len--;
175 }
176 else if (!equals)
177 e->setto = ATTR__TRUE;
178 else {
182af834 179 e->setto = xmemdupz(equals + 1, ep - equals - 1);
515106fa 180 }
7fb0eaa2 181 e->attr = git_attr_internal(cp, len);
515106fa 182 }
515106fa
JH
183 return ep + strspn(ep, blank);
184}
185
f48fd688
JH
186static struct match_attr *parse_attr_line(const char *line, const char *src,
187 int lineno, int macro_ok)
d0bfd026
JH
188{
189 int namelen;
190 int num_attr;
191 const char *cp, *name;
515106fa 192 struct match_attr *res = NULL;
d0bfd026 193 int pass;
f48fd688 194 int is_macro;
d0bfd026
JH
195
196 cp = line + strspn(line, blank);
197 if (!*cp || *cp == '#')
198 return NULL;
199 name = cp;
200 namelen = strcspn(name, blank);
f48fd688
JH
201 if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
202 !prefixcmp(name, ATTRIBUTE_MACRO_PREFIX)) {
203 if (!macro_ok) {
204 fprintf(stderr, "%s not allowed: %s:%d\n",
205 name, src, lineno);
206 return NULL;
207 }
208 is_macro = 1;
209 name += strlen(ATTRIBUTE_MACRO_PREFIX);
210 name += strspn(name, blank);
211 namelen = strcspn(name, blank);
e4aee10a
JH
212 if (invalid_attr_name(name, namelen)) {
213 fprintf(stderr,
214 "%.*s is not a valid attribute name: %s:%d\n",
215 namelen, name, src, lineno);
216 return NULL;
217 }
f48fd688
JH
218 }
219 else
220 is_macro = 0;
d0bfd026
JH
221
222 for (pass = 0; pass < 2; pass++) {
223 /* pass 0 counts and allocates, pass 1 fills */
224 num_attr = 0;
225 cp = name + namelen;
226 cp = cp + strspn(cp, blank);
d7b0a093 227 while (*cp) {
4c7517c9 228 cp = parse_attr(src, lineno, cp, num_attr, res);
d7b0a093
SP
229 if (!cp)
230 return NULL;
4c7517c9 231 num_attr++;
d7b0a093 232 }
d0bfd026
JH
233 if (pass)
234 break;
235 res = xcalloc(1,
236 sizeof(*res) +
237 sizeof(struct attr_state) * num_attr +
f48fd688 238 (is_macro ? 0 : namelen + 1));
515106fa 239 if (is_macro)
7fb0eaa2 240 res->u.attr = git_attr_internal(name, namelen);
f48fd688 241 else {
4b25d091 242 res->u.pattern = (char *)&(res->state[num_attr]);
f48fd688
JH
243 memcpy(res->u.pattern, name, namelen);
244 res->u.pattern[namelen] = 0;
245 }
246 res->is_macro = is_macro;
d0bfd026
JH
247 res->num_attr = num_attr;
248 }
249 return res;
250}
251
252/*
253 * Like info/exclude and .gitignore, the attribute information can
254 * come from many places.
255 *
256 * (1) .gitattribute file of the same directory;
515106fa
JH
257 * (2) .gitattribute file of the parent directory if (1) does not have
258 * any match; this goes recursively upwards, just like .gitignore.
259 * (3) $GIT_DIR/info/attributes, which overrides both of the above.
d0bfd026
JH
260 *
261 * In the same file, later entries override the earlier match, so in the
262 * global list, we would have entries from info/attributes the earliest
263 * (reading the file from top to bottom), .gitattribute of the root
264 * directory (again, reading the file from top to bottom) down to the
265 * current directory, and then scan the list backwards to find the first match.
266 * This is exactly the same as what excluded() does in dir.c to deal with
267 * .gitignore
268 */
269
270static struct attr_stack {
271 struct attr_stack *prev;
272 char *origin;
273 unsigned num_matches;
a4413118 274 unsigned alloc;
d0bfd026
JH
275 struct match_attr **attrs;
276} *attr_stack;
277
278static void free_attr_elem(struct attr_stack *e)
279{
280 int i;
281 free(e->origin);
515106fa
JH
282 for (i = 0; i < e->num_matches; i++) {
283 struct match_attr *a = e->attrs[i];
284 int j;
285 for (j = 0; j < a->num_attr; j++) {
a5e92abd 286 const char *setto = a->state[j].setto;
515106fa
JH
287 if (setto == ATTR__TRUE ||
288 setto == ATTR__FALSE ||
289 setto == ATTR__UNSET ||
290 setto == ATTR__UNKNOWN)
291 ;
292 else
4b25d091 293 free((char *) setto);
515106fa
JH
294 }
295 free(a);
296 }
d0bfd026
JH
297 free(e);
298}
299
300static const char *builtin_attr[] = {
5ec3e670 301 "[attr]binary -diff -text",
d0bfd026
JH
302 NULL,
303};
304
a4413118
JH
305static void handle_attr_line(struct attr_stack *res,
306 const char *line,
307 const char *src,
308 int lineno,
309 int macro_ok)
310{
311 struct match_attr *a;
312
313 a = parse_attr_line(line, src, lineno, macro_ok);
314 if (!a)
315 return;
316 if (res->alloc <= res->num_matches) {
317 res->alloc = alloc_nr(res->num_matches);
318 res->attrs = xrealloc(res->attrs,
319 sizeof(struct match_attr *) *
320 res->alloc);
321 }
322 res->attrs[res->num_matches++] = a;
323}
324
d0bfd026
JH
325static struct attr_stack *read_attr_from_array(const char **list)
326{
327 struct attr_stack *res;
328 const char *line;
f48fd688 329 int lineno = 0;
d0bfd026
JH
330
331 res = xcalloc(1, sizeof(*res));
a4413118
JH
332 while ((line = *(list++)) != NULL)
333 handle_attr_line(res, line, "[builtin]", ++lineno, 1);
d0bfd026
JH
334 return res;
335}
336
06f33c17
JH
337static enum git_attr_direction direction;
338static struct index_state *use_index;
339
f48fd688 340static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
d0bfd026 341{
a4413118 342 FILE *fp = fopen(path, "r");
d0bfd026
JH
343 struct attr_stack *res;
344 char buf[2048];
f48fd688 345 int lineno = 0;
d0bfd026 346
d0bfd026 347 if (!fp)
a4413118
JH
348 return NULL;
349 res = xcalloc(1, sizeof(*res));
350 while (fgets(buf, sizeof(buf), fp))
351 handle_attr_line(res, buf, path, ++lineno, macro_ok);
352 fclose(fp);
353 return res;
354}
d0bfd026 355
1a9d7e9b
JH
356static void *read_index_data(const char *path)
357{
358 int pos, len;
359 unsigned long sz;
360 enum object_type type;
361 void *data;
06f33c17 362 struct index_state *istate = use_index ? use_index : &the_index;
1a9d7e9b
JH
363
364 len = strlen(path);
06f33c17 365 pos = index_name_pos(istate, path, len);
1a9d7e9b
JH
366 if (pos < 0) {
367 /*
368 * We might be in the middle of a merge, in which
369 * case we would read stage #2 (ours).
370 */
371 int i;
372 for (i = -pos - 1;
06f33c17
JH
373 (pos < 0 && i < istate->cache_nr &&
374 !strcmp(istate->cache[i]->name, path));
1a9d7e9b 375 i++)
06f33c17 376 if (ce_stage(istate->cache[i]) == 2)
1a9d7e9b
JH
377 pos = i;
378 }
379 if (pos < 0)
380 return NULL;
06f33c17 381 data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz);
1a9d7e9b
JH
382 if (!data || type != OBJ_BLOB) {
383 free(data);
384 return NULL;
385 }
386 return data;
387}
388
06f33c17 389static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
a4413118
JH
390{
391 struct attr_stack *res;
1a9d7e9b
JH
392 char *buf, *sp;
393 int lineno = 0;
f48fd688 394
1a9d7e9b
JH
395 buf = read_index_data(path);
396 if (!buf)
06f33c17 397 return NULL;
1a9d7e9b 398
06f33c17 399 res = xcalloc(1, sizeof(*res));
1a9d7e9b
JH
400 for (sp = buf; *sp; ) {
401 char *ep;
402 int more;
403 for (ep = sp; *ep && *ep != '\n'; ep++)
404 ;
405 more = (*ep == '\n');
406 *ep = '\0';
407 handle_attr_line(res, sp, path, ++lineno, macro_ok);
408 sp = ep + more;
409 }
410 free(buf);
d0bfd026
JH
411 return res;
412}
413
06f33c17
JH
414static struct attr_stack *read_attr(const char *path, int macro_ok)
415{
416 struct attr_stack *res;
417
418 if (direction == GIT_ATTR_CHECKOUT) {
419 res = read_attr_from_index(path, macro_ok);
420 if (!res)
421 res = read_attr_from_file(path, macro_ok);
422 }
4191e80a 423 else if (direction == GIT_ATTR_CHECKIN) {
06f33c17
JH
424 res = read_attr_from_file(path, macro_ok);
425 if (!res)
426 /*
427 * There is no checked out .gitattributes file there, but
428 * we might have it in the index. We allow operation in a
429 * sparsely checked out work tree, so read from it.
430 */
431 res = read_attr_from_index(path, macro_ok);
432 }
4191e80a
NTND
433 else
434 res = read_attr_from_index(path, macro_ok);
06f33c17
JH
435 if (!res)
436 res = xcalloc(1, sizeof(*res));
437 return res;
438}
439
d0bfd026
JH
440#if DEBUG_ATTR
441static void debug_info(const char *what, struct attr_stack *elem)
442{
443 fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()");
444}
cf94ccda 445static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v)
f48fd688 446{
515106fa
JH
447 const char *value = v;
448
449 if (ATTR_TRUE(value))
450 value = "set";
451 else if (ATTR_FALSE(value))
452 value = "unset";
453 else if (ATTR_UNSET(value))
454 value = "unspecified";
455
456 fprintf(stderr, "%s: %s => %s (%s)\n",
457 what, attr->name, (char *) value, match);
f48fd688 458}
d0bfd026
JH
459#define debug_push(a) debug_info("push", (a))
460#define debug_pop(a) debug_info("pop", (a))
461#else
462#define debug_push(a) do { ; } while (0)
463#define debug_pop(a) do { ; } while (0)
f48fd688 464#define debug_set(a,b,c,d) do { ; } while (0)
d0bfd026
JH
465#endif
466
06f33c17
JH
467static void drop_attr_stack(void)
468{
469 while (attr_stack) {
470 struct attr_stack *elem = attr_stack;
471 attr_stack = elem->prev;
472 free_attr_elem(elem);
473 }
474}
475
c5147722 476static const char *git_etc_gitattributes(void)
6df42ab9
PO
477{
478 static const char *system_wide;
479 if (!system_wide)
480 system_wide = system_path(ETC_GITATTRIBUTES);
481 return system_wide;
482}
483
c5147722 484static int git_attr_system(void)
6df42ab9
PO
485{
486 return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
487}
488
6df42ab9
PO
489static int git_attr_config(const char *var, const char *value, void *dummy)
490{
491 if (!strcmp(var, "core.attributesfile"))
492 return git_config_pathname(&attributes_file, var, value);
493
494 return 0;
495}
496
f48fd688
JH
497static void bootstrap_attr_stack(void)
498{
499 if (!attr_stack) {
500 struct attr_stack *elem;
501
502 elem = read_attr_from_array(builtin_attr);
503 elem->origin = NULL;
504 elem->prev = attr_stack;
505 attr_stack = elem;
506
6df42ab9
PO
507 if (git_attr_system()) {
508 elem = read_attr_from_file(git_etc_gitattributes(), 1);
509 if (elem) {
510 elem->origin = NULL;
511 elem->prev = attr_stack;
512 attr_stack = elem;
513 }
514 }
515
516 git_config(git_attr_config, NULL);
e91b6c50 517 if (attributes_file) {
6df42ab9
PO
518 elem = read_attr_from_file(attributes_file, 1);
519 if (elem) {
520 elem->origin = NULL;
521 elem->prev = attr_stack;
522 attr_stack = elem;
523 }
524 }
525
4191e80a 526 if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
2d35d556
RS
527 elem = read_attr(GITATTRIBUTES_FILE, 1);
528 elem->origin = strdup("");
529 elem->prev = attr_stack;
530 attr_stack = elem;
531 debug_push(elem);
532 }
f48fd688
JH
533
534 elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1);
a4413118
JH
535 if (!elem)
536 elem = xcalloc(1, sizeof(*elem));
f48fd688
JH
537 elem->origin = NULL;
538 elem->prev = attr_stack;
539 attr_stack = elem;
540 }
541}
542
d0bfd026
JH
543static void prepare_attr_stack(const char *path, int dirlen)
544{
545 struct attr_stack *elem, *info;
546 int len;
f66cf96d
DP
547 struct strbuf pathbuf;
548
549 strbuf_init(&pathbuf, dirlen+2+strlen(GITATTRIBUTES_FILE));
d0bfd026
JH
550
551 /*
552 * At the bottom of the attribute stack is the built-in
6df42ab9
PO
553 * set of attribute definitions, followed by the contents
554 * of $(prefix)/etc/gitattributes and a file specified by
555 * core.attributesfile. Then, contents from
d0bfd026
JH
556 * .gitattribute files from directories closer to the
557 * root to the ones in deeper directories are pushed
558 * to the stack. Finally, at the very top of the stack
559 * we always keep the contents of $GIT_DIR/info/attributes.
560 *
561 * When checking, we use entries from near the top of the
562 * stack, preferring $GIT_DIR/info/attributes, then
563 * .gitattributes in deeper directories to shallower ones,
564 * and finally use the built-in set as the default.
565 */
f48fd688
JH
566 if (!attr_stack)
567 bootstrap_attr_stack();
d0bfd026
JH
568
569 /*
570 * Pop the "info" one that is always at the top of the stack.
571 */
572 info = attr_stack;
573 attr_stack = info->prev;
574
575 /*
576 * Pop the ones from directories that are not the prefix of
577 * the path we are checking.
578 */
579 while (attr_stack && attr_stack->origin) {
580 int namelen = strlen(attr_stack->origin);
581
582 elem = attr_stack;
583 if (namelen <= dirlen &&
584 !strncmp(elem->origin, path, namelen))
585 break;
586
587 debug_pop(elem);
588 attr_stack = elem->prev;
589 free_attr_elem(elem);
590 }
591
592 /*
593 * Read from parent directories and push them down
594 */
4191e80a 595 if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
2d35d556
RS
596 while (1) {
597 char *cp;
598
599 len = strlen(attr_stack->origin);
600 if (dirlen <= len)
601 break;
f66cf96d
DP
602 strbuf_reset(&pathbuf);
603 strbuf_add(&pathbuf, path, dirlen);
604 strbuf_addch(&pathbuf, '/');
605 cp = strchr(pathbuf.buf + len + 1, '/');
2d35d556 606 strcpy(cp + 1, GITATTRIBUTES_FILE);
f66cf96d 607 elem = read_attr(pathbuf.buf, 0);
2d35d556 608 *cp = '\0';
f66cf96d 609 elem->origin = strdup(pathbuf.buf);
2d35d556
RS
610 elem->prev = attr_stack;
611 attr_stack = elem;
612 debug_push(elem);
613 }
d0bfd026
JH
614 }
615
d4c98565
RS
616 strbuf_release(&pathbuf);
617
d0bfd026
JH
618 /*
619 * Finally push the "info" one at the top of the stack.
620 */
621 info->prev = attr_stack;
622 attr_stack = info;
623}
624
625static int path_matches(const char *pathname, int pathlen,
626 const char *pattern,
627 const char *base, int baselen)
628{
629 if (!strchr(pattern, '/')) {
630 /* match basename */
631 const char *basename = strrchr(pathname, '/');
632 basename = basename ? basename + 1 : pathname;
633 return (fnmatch(pattern, basename, 0) == 0);
634 }
635 /*
636 * match with FNM_PATHNAME; the pattern has base implicitly
637 * in front of it.
638 */
639 if (*pattern == '/')
640 pattern++;
641 if (pathlen < baselen ||
cf94ccda 642 (baselen && pathname[baselen] != '/') ||
d0bfd026
JH
643 strncmp(pathname, base, baselen))
644 return 0;
82881b38
MO
645 if (baselen != 0)
646 baselen++;
647 return fnmatch(pattern, pathname + baselen, FNM_PATHNAME) == 0;
d0bfd026
JH
648}
649
ec775c41
HG
650static int macroexpand_one(int attr_nr, int rem);
651
515106fa
JH
652static int fill_one(const char *what, struct match_attr *a, int rem)
653{
654 struct git_attr_check *check = check_all_attr;
655 int i;
656
969f9d73 657 for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) {
515106fa 658 struct git_attr *attr = a->state[i].attr;
a5e92abd
JH
659 const char **n = &(check[attr->attr_nr].value);
660 const char *v = a->state[i].setto;
515106fa
JH
661
662 if (*n == ATTR__UNKNOWN) {
426c27b7
HG
663 debug_set(what,
664 a->is_macro ? a->u.attr->name : a->u.pattern,
665 attr, v);
515106fa
JH
666 *n = v;
667 rem--;
ec775c41 668 rem = macroexpand_one(attr->attr_nr, rem);
515106fa
JH
669 }
670 }
671 return rem;
672}
673
f48fd688 674static int fill(const char *path, int pathlen, 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;
d0bfd026 683 if (path_matches(path, pathlen,
515106fa
JH
684 a->u.pattern, base, strlen(base)))
685 rem = fill_one("fill", a, rem);
d0bfd026
JH
686 }
687 return rem;
688}
689
ec775c41 690static 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
d0bfd026
JH
714int git_checkattr(const char *path, int num, struct git_attr_check *check)
715{
716 struct attr_stack *stk;
717 const char *cp;
718 int dirlen, pathlen, i, rem;
719
f48fd688
JH
720 bootstrap_attr_stack();
721 for (i = 0; i < attr_nr; i++)
515106fa 722 check_all_attr[i].value = ATTR__UNKNOWN;
d0bfd026
JH
723
724 pathlen = strlen(path);
725 cp = strrchr(path, '/');
726 if (!cp)
727 dirlen = 0;
728 else
729 dirlen = cp - path;
730 prepare_attr_stack(path, dirlen);
f48fd688
JH
731 rem = attr_nr;
732 for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
733 rem = fill(path, pathlen, stk, rem);
734
515106fa 735 for (i = 0; i < num; i++) {
a5e92abd 736 const char *value = check_all_attr[check[i].attr->attr_nr].value;
515106fa
JH
737 if (value == ATTR__UNKNOWN)
738 value = ATTR__UNSET;
739 check[i].value = value;
740 }
f48fd688 741
d0bfd026
JH
742 return 0;
743}
06f33c17
JH
744
745void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate)
746{
747 enum git_attr_direction old = direction;
4191e80a
NTND
748
749 if (is_bare_repository() && new != GIT_ATTR_INDEX)
750 die("BUG: non-INDEX attr direction in a bare repo");
751
06f33c17
JH
752 direction = new;
753 if (new != old)
754 drop_attr_stack();
755 use_index = istate;
756}