config: use utf8_bom[] from utf.[ch] in git_parse_source()
[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 99
2756ca43 100 REALLOC_ARRAY(check_all_attr, attr_nr);
f48fd688 101 check_all_attr[a->attr_nr].attr = a;
515106fa 102 check_all_attr[a->attr_nr].value = ATTR__UNKNOWN;
d0bfd026
JH
103 return a;
104}
105
7fb0eaa2
JH
106struct git_attr *git_attr(const char *name)
107{
108 return git_attr_internal(name, strlen(name));
109}
110
515106fa 111/* What does a matched pattern decide? */
d0bfd026 112struct attr_state {
d0bfd026 113 struct git_attr *attr;
a5e92abd 114 const char *setto;
d0bfd026
JH
115};
116
82dce998
NTND
117struct pattern {
118 const char *pattern;
119 int patternlen;
120 int nowildcardlen;
121 int flags; /* EXC_FLAG_* */
122};
123
ba845b75
MH
124/*
125 * One rule, as from a .gitattributes file.
126 *
127 * If is_macro is true, then u.attr is a pointer to the git_attr being
128 * defined.
129 *
130 * If is_macro is false, then u.pattern points at the filename pattern
131 * to which the rule applies. (The memory pointed to is part of the
132 * memory block allocated for the match_attr instance.)
133 *
134 * In either case, num_attr is the number of attributes affected by
135 * this rule, and state is an array listing them. The attributes are
136 * listed as they appear in the file (macros unexpanded).
137 */
d0bfd026 138struct match_attr {
f48fd688 139 union {
82dce998 140 struct pattern pat;
f48fd688
JH
141 struct git_attr *attr;
142 } u;
143 char is_macro;
d0bfd026
JH
144 unsigned num_attr;
145 struct attr_state state[FLEX_ARRAY];
146};
147
148static const char blank[] = " \t\r\n";
149
d1751298
MH
150/*
151 * Parse a whitespace-delimited attribute state (i.e., "attr",
152 * "-attr", "!attr", or "attr=value") from the string starting at src.
153 * If e is not NULL, write the results to *e. Return a pointer to the
154 * remainder of the string (with leading whitespace removed), or NULL
155 * if there was an error.
156 */
515106fa 157static const char *parse_attr(const char *src, int lineno, const char *cp,
d1751298 158 struct attr_state *e)
515106fa
JH
159{
160 const char *ep, *equals;
161 int len;
162
163 ep = cp + strcspn(cp, blank);
164 equals = strchr(cp, '=');
165 if (equals && ep < equals)
166 equals = NULL;
167 if (equals)
168 len = equals - cp;
169 else
170 len = ep - cp;
d1751298 171 if (!e) {
515106fa
JH
172 if (*cp == '-' || *cp == '!') {
173 cp++;
174 len--;
175 }
176 if (invalid_attr_name(cp, len)) {
177 fprintf(stderr,
178 "%.*s is not a valid attribute name: %s:%d\n",
179 len, cp, src, lineno);
180 return NULL;
181 }
182 } else {
515106fa
JH
183 if (*cp == '-' || *cp == '!') {
184 e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;
185 cp++;
186 len--;
187 }
188 else if (!equals)
189 e->setto = ATTR__TRUE;
190 else {
182af834 191 e->setto = xmemdupz(equals + 1, ep - equals - 1);
515106fa 192 }
7fb0eaa2 193 e->attr = git_attr_internal(cp, len);
515106fa 194 }
515106fa
JH
195 return ep + strspn(ep, blank);
196}
197
f48fd688
JH
198static struct match_attr *parse_attr_line(const char *line, const char *src,
199 int lineno, int macro_ok)
d0bfd026
JH
200{
201 int namelen;
d68e1c18 202 int num_attr, i;
85c4a0d0 203 const char *cp, *name, *states;
515106fa 204 struct match_attr *res = NULL;
f48fd688 205 int is_macro;
d0bfd026
JH
206
207 cp = line + strspn(line, blank);
208 if (!*cp || *cp == '#')
209 return NULL;
210 name = cp;
211 namelen = strcspn(name, blank);
f48fd688 212 if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
59556548 213 starts_with(name, ATTRIBUTE_MACRO_PREFIX)) {
f48fd688
JH
214 if (!macro_ok) {
215 fprintf(stderr, "%s not allowed: %s:%d\n",
216 name, src, lineno);
217 return NULL;
218 }
219 is_macro = 1;
220 name += strlen(ATTRIBUTE_MACRO_PREFIX);
221 name += strspn(name, blank);
222 namelen = strcspn(name, blank);
e4aee10a
JH
223 if (invalid_attr_name(name, namelen)) {
224 fprintf(stderr,
225 "%.*s is not a valid attribute name: %s:%d\n",
226 namelen, name, src, lineno);
227 return NULL;
228 }
f48fd688
JH
229 }
230 else
231 is_macro = 0;
d0bfd026 232
85c4a0d0
MH
233 states = name + namelen;
234 states += strspn(states, blank);
235
d68e1c18
MH
236 /* First pass to count the attr_states */
237 for (cp = states, num_attr = 0; *cp; num_attr++) {
238 cp = parse_attr(src, lineno, cp, NULL);
239 if (!cp)
240 return NULL;
d0bfd026 241 }
d68e1c18
MH
242
243 res = xcalloc(1,
244 sizeof(*res) +
245 sizeof(struct attr_state) * num_attr +
246 (is_macro ? 0 : namelen + 1));
247 if (is_macro)
248 res->u.attr = git_attr_internal(name, namelen);
249 else {
82dce998
NTND
250 char *p = (char *)&(res->state[num_attr]);
251 memcpy(p, name, namelen);
252 res->u.pat.pattern = p;
253 parse_exclude_pattern(&res->u.pat.pattern,
254 &res->u.pat.patternlen,
255 &res->u.pat.flags,
256 &res->u.pat.nowildcardlen);
8b1bd024
TR
257 if (res->u.pat.flags & EXC_FLAG_NEGATIVE) {
258 warning(_("Negative patterns are ignored in git attributes\n"
259 "Use '\\!' for literal leading exclamation."));
260 return NULL;
261 }
d0bfd026 262 }
d68e1c18
MH
263 res->is_macro = is_macro;
264 res->num_attr = num_attr;
265
266 /* Second pass to fill the attr_states */
267 for (cp = states, i = 0; *cp; i++) {
268 cp = parse_attr(src, lineno, cp, &(res->state[i]));
269 }
270
d0bfd026
JH
271 return res;
272}
273
274/*
275 * Like info/exclude and .gitignore, the attribute information can
276 * come from many places.
277 *
278 * (1) .gitattribute file of the same directory;
515106fa
JH
279 * (2) .gitattribute file of the parent directory if (1) does not have
280 * any match; this goes recursively upwards, just like .gitignore.
281 * (3) $GIT_DIR/info/attributes, which overrides both of the above.
d0bfd026
JH
282 *
283 * In the same file, later entries override the earlier match, so in the
284 * global list, we would have entries from info/attributes the earliest
285 * (reading the file from top to bottom), .gitattribute of the root
286 * directory (again, reading the file from top to bottom) down to the
287 * current directory, and then scan the list backwards to find the first match.
6d24e7a8 288 * This is exactly the same as what is_excluded() does in dir.c to deal with
d0bfd026
JH
289 * .gitignore
290 */
291
292static struct attr_stack {
293 struct attr_stack *prev;
294 char *origin;
cd6a0b26 295 size_t originlen;
d0bfd026 296 unsigned num_matches;
a4413118 297 unsigned alloc;
d0bfd026
JH
298 struct match_attr **attrs;
299} *attr_stack;
300
301static void free_attr_elem(struct attr_stack *e)
302{
303 int i;
304 free(e->origin);
515106fa
JH
305 for (i = 0; i < e->num_matches; i++) {
306 struct match_attr *a = e->attrs[i];
307 int j;
308 for (j = 0; j < a->num_attr; j++) {
a5e92abd 309 const char *setto = a->state[j].setto;
515106fa
JH
310 if (setto == ATTR__TRUE ||
311 setto == ATTR__FALSE ||
312 setto == ATTR__UNSET ||
313 setto == ATTR__UNKNOWN)
314 ;
315 else
4b25d091 316 free((char *) setto);
515106fa
JH
317 }
318 free(a);
319 }
37475f97 320 free(e->attrs);
d0bfd026
JH
321 free(e);
322}
323
324static const char *builtin_attr[] = {
155a4b71 325 "[attr]binary -diff -merge -text",
d0bfd026
JH
326 NULL,
327};
328
a4413118
JH
329static void handle_attr_line(struct attr_stack *res,
330 const char *line,
331 const char *src,
332 int lineno,
333 int macro_ok)
334{
335 struct match_attr *a;
336
337 a = parse_attr_line(line, src, lineno, macro_ok);
338 if (!a)
339 return;
3a7fa03d 340 ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc);
a4413118
JH
341 res->attrs[res->num_matches++] = a;
342}
343
d0bfd026
JH
344static struct attr_stack *read_attr_from_array(const char **list)
345{
346 struct attr_stack *res;
347 const char *line;
f48fd688 348 int lineno = 0;
d0bfd026
JH
349
350 res = xcalloc(1, sizeof(*res));
a4413118
JH
351 while ((line = *(list++)) != NULL)
352 handle_attr_line(res, line, "[builtin]", ++lineno, 1);
d0bfd026
JH
353 return res;
354}
355
06f33c17
JH
356static enum git_attr_direction direction;
357static struct index_state *use_index;
358
f48fd688 359static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
d0bfd026 360{
a4413118 361 FILE *fp = fopen(path, "r");
d0bfd026
JH
362 struct attr_stack *res;
363 char buf[2048];
f48fd688 364 int lineno = 0;
d0bfd026 365
11e50b27 366 if (!fp) {
8e950dab 367 if (errno != ENOENT && errno != ENOTDIR)
55b38a48 368 warn_on_inaccessible(path);
a4413118 369 return NULL;
11e50b27 370 }
a4413118
JH
371 res = xcalloc(1, sizeof(*res));
372 while (fgets(buf, sizeof(buf), fp))
373 handle_attr_line(res, buf, path, ++lineno, macro_ok);
374 fclose(fp);
375 return res;
376}
d0bfd026 377
06f33c17 378static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
a4413118
JH
379{
380 struct attr_stack *res;
1a9d7e9b
JH
381 char *buf, *sp;
382 int lineno = 0;
f48fd688 383
ff366825 384 buf = read_blob_data_from_index(use_index ? use_index : &the_index, path, NULL);
1a9d7e9b 385 if (!buf)
06f33c17 386 return NULL;
1a9d7e9b 387
06f33c17 388 res = xcalloc(1, sizeof(*res));
1a9d7e9b
JH
389 for (sp = buf; *sp; ) {
390 char *ep;
391 int more;
392 for (ep = sp; *ep && *ep != '\n'; ep++)
393 ;
394 more = (*ep == '\n');
395 *ep = '\0';
396 handle_attr_line(res, sp, path, ++lineno, macro_ok);
397 sp = ep + more;
398 }
399 free(buf);
d0bfd026
JH
400 return res;
401}
402
06f33c17
JH
403static struct attr_stack *read_attr(const char *path, int macro_ok)
404{
405 struct attr_stack *res;
406
407 if (direction == GIT_ATTR_CHECKOUT) {
408 res = read_attr_from_index(path, macro_ok);
409 if (!res)
410 res = read_attr_from_file(path, macro_ok);
411 }
4191e80a 412 else if (direction == GIT_ATTR_CHECKIN) {
06f33c17
JH
413 res = read_attr_from_file(path, macro_ok);
414 if (!res)
415 /*
416 * There is no checked out .gitattributes file there, but
417 * we might have it in the index. We allow operation in a
418 * sparsely checked out work tree, so read from it.
419 */
420 res = read_attr_from_index(path, macro_ok);
421 }
4191e80a
NTND
422 else
423 res = read_attr_from_index(path, macro_ok);
06f33c17
JH
424 if (!res)
425 res = xcalloc(1, sizeof(*res));
426 return res;
427}
428
d0bfd026
JH
429#if DEBUG_ATTR
430static void debug_info(const char *what, struct attr_stack *elem)
431{
432 fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()");
433}
cf94ccda 434static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v)
f48fd688 435{
515106fa
JH
436 const char *value = v;
437
438 if (ATTR_TRUE(value))
439 value = "set";
440 else if (ATTR_FALSE(value))
441 value = "unset";
442 else if (ATTR_UNSET(value))
443 value = "unspecified";
444
445 fprintf(stderr, "%s: %s => %s (%s)\n",
446 what, attr->name, (char *) value, match);
f48fd688 447}
d0bfd026
JH
448#define debug_push(a) debug_info("push", (a))
449#define debug_pop(a) debug_info("pop", (a))
450#else
451#define debug_push(a) do { ; } while (0)
452#define debug_pop(a) do { ; } while (0)
f48fd688 453#define debug_set(a,b,c,d) do { ; } while (0)
d0bfd026
JH
454#endif
455
06f33c17
JH
456static void drop_attr_stack(void)
457{
458 while (attr_stack) {
459 struct attr_stack *elem = attr_stack;
460 attr_stack = elem->prev;
461 free_attr_elem(elem);
462 }
463}
464
c5147722 465static const char *git_etc_gitattributes(void)
6df42ab9
PO
466{
467 static const char *system_wide;
468 if (!system_wide)
469 system_wide = system_path(ETC_GITATTRIBUTES);
470 return system_wide;
471}
472
c5147722 473static int git_attr_system(void)
6df42ab9
PO
474{
475 return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
476}
477
f48fd688
JH
478static void bootstrap_attr_stack(void)
479{
909ca7b9 480 struct attr_stack *elem;
684e40f6 481 char *xdg_attributes_file;
f48fd688 482
909ca7b9
JH
483 if (attr_stack)
484 return;
f48fd688 485
909ca7b9
JH
486 elem = read_attr_from_array(builtin_attr);
487 elem->origin = NULL;
488 elem->prev = attr_stack;
489 attr_stack = elem;
6df42ab9 490
909ca7b9
JH
491 if (git_attr_system()) {
492 elem = read_attr_from_file(git_etc_gitattributes(), 1);
493 if (elem) {
494 elem->origin = NULL;
495 elem->prev = attr_stack;
496 attr_stack = elem;
6df42ab9 497 }
909ca7b9 498 }
6df42ab9 499
684e40f6
HKNN
500 if (!git_attributes_file) {
501 home_config_paths(NULL, &xdg_attributes_file, "attributes");
502 git_attributes_file = xdg_attributes_file;
503 }
f0c1c15c
JK
504 if (git_attributes_file) {
505 elem = read_attr_from_file(git_attributes_file, 1);
506 if (elem) {
507 elem->origin = NULL;
508 elem->prev = attr_stack;
509 attr_stack = elem;
510 }
909ca7b9 511 }
f48fd688 512
909ca7b9
JH
513 if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
514 elem = read_attr(GITATTRIBUTES_FILE, 1);
6c65b5ea 515 elem->origin = xstrdup("");
cd6a0b26 516 elem->originlen = 0;
f48fd688
JH
517 elem->prev = attr_stack;
518 attr_stack = elem;
909ca7b9 519 debug_push(elem);
f48fd688 520 }
909ca7b9
JH
521
522 elem = read_attr_from_file(git_path(INFOATTRIBUTES_FILE), 1);
523 if (!elem)
524 elem = xcalloc(1, sizeof(*elem));
525 elem->origin = NULL;
526 elem->prev = attr_stack;
527 attr_stack = elem;
f48fd688
JH
528}
529
9db9eecf 530static void prepare_attr_stack(const char *path, int dirlen)
d0bfd026
JH
531{
532 struct attr_stack *elem, *info;
9db9eecf 533 int len;
a8727017
MH
534 const char *cp;
535
d0bfd026
JH
536 /*
537 * At the bottom of the attribute stack is the built-in
6df42ab9
PO
538 * set of attribute definitions, followed by the contents
539 * of $(prefix)/etc/gitattributes and a file specified by
540 * core.attributesfile. Then, contents from
d0bfd026
JH
541 * .gitattribute files from directories closer to the
542 * root to the ones in deeper directories are pushed
543 * to the stack. Finally, at the very top of the stack
544 * we always keep the contents of $GIT_DIR/info/attributes.
545 *
546 * When checking, we use entries from near the top of the
547 * stack, preferring $GIT_DIR/info/attributes, then
548 * .gitattributes in deeper directories to shallower ones,
549 * and finally use the built-in set as the default.
550 */
7373eab4 551 bootstrap_attr_stack();
d0bfd026
JH
552
553 /*
554 * Pop the "info" one that is always at the top of the stack.
555 */
556 info = attr_stack;
557 attr_stack = info->prev;
558
559 /*
560 * Pop the ones from directories that are not the prefix of
c432ef99
JH
561 * the path we are checking. Break out of the loop when we see
562 * the root one (whose origin is an empty string "") or the builtin
563 * one (whose origin is NULL) without popping it.
d0bfd026 564 */
77f7f822 565 while (attr_stack->origin) {
d0bfd026
JH
566 int namelen = strlen(attr_stack->origin);
567
568 elem = attr_stack;
569 if (namelen <= dirlen &&
1afca444
JK
570 !strncmp(elem->origin, path, namelen) &&
571 (!namelen || path[namelen] == '/'))
d0bfd026
JH
572 break;
573
574 debug_pop(elem);
575 attr_stack = elem->prev;
576 free_attr_elem(elem);
577 }
578
579 /*
580 * Read from parent directories and push them down
581 */
4191e80a 582 if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
c432ef99
JH
583 /*
584 * bootstrap_attr_stack() should have added, and the
585 * above loop should have stopped before popping, the
586 * root element whose attr_stack->origin is set to an
587 * empty string.
588 */
97410b27 589 struct strbuf pathbuf = STRBUF_INIT;
2d35d556 590
c432ef99 591 assert(attr_stack->origin);
97410b27 592 while (1) {
2d35d556
RS
593 len = strlen(attr_stack->origin);
594 if (dirlen <= len)
595 break;
97410b27
BC
596 cp = memchr(path + len + 1, '/', dirlen - len - 1);
597 if (!cp)
598 cp = path + dirlen;
599 strbuf_add(&pathbuf, path, cp - path);
f66cf96d 600 strbuf_addch(&pathbuf, '/');
97410b27 601 strbuf_addstr(&pathbuf, GITATTRIBUTES_FILE);
f66cf96d 602 elem = read_attr(pathbuf.buf, 0);
97410b27 603 strbuf_setlen(&pathbuf, cp - path);
cd6a0b26 604 elem->origin = strbuf_detach(&pathbuf, &elem->originlen);
2d35d556
RS
605 elem->prev = attr_stack;
606 attr_stack = elem;
607 debug_push(elem);
608 }
d0bfd026 609
97410b27
BC
610 strbuf_release(&pathbuf);
611 }
d4c98565 612
d0bfd026
JH
613 /*
614 * Finally push the "info" one at the top of the stack.
615 */
616 info->prev = attr_stack;
617 attr_stack = info;
618}
619
620static int path_matches(const char *pathname, int pathlen,
bd2f371d 621 int basename_offset,
82dce998 622 const struct pattern *pat,
d0bfd026
JH
623 const char *base, int baselen)
624{
82dce998
NTND
625 const char *pattern = pat->pattern;
626 int prefix = pat->nowildcardlen;
dc09e9ec 627 int isdir = (pathlen && pathname[pathlen - 1] == '/');
82dce998 628
dc09e9ec 629 if ((pat->flags & EXC_FLAG_MUSTBEDIR) && !isdir)
94bc671a
JNA
630 return 0;
631
82dce998 632 if (pat->flags & EXC_FLAG_NODIR) {
bd2f371d 633 return match_basename(pathname + basename_offset,
dc09e9ec 634 pathlen - basename_offset - isdir,
82dce998
NTND
635 pattern, prefix,
636 pat->patternlen, pat->flags);
d0bfd026 637 }
dc09e9ec 638 return match_pathname(pathname, pathlen - isdir,
82dce998
NTND
639 base, baselen,
640 pattern, prefix, pat->patternlen, pat->flags);
d0bfd026
JH
641}
642
ec775c41
HG
643static int macroexpand_one(int attr_nr, int rem);
644
515106fa
JH
645static int fill_one(const char *what, struct match_attr *a, int rem)
646{
647 struct git_attr_check *check = check_all_attr;
648 int i;
649
969f9d73 650 for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) {
515106fa 651 struct git_attr *attr = a->state[i].attr;
a5e92abd
JH
652 const char **n = &(check[attr->attr_nr].value);
653 const char *v = a->state[i].setto;
515106fa
JH
654
655 if (*n == ATTR__UNKNOWN) {
426c27b7 656 debug_set(what,
712efb1a 657 a->is_macro ? a->u.attr->name : a->u.pat.pattern,
426c27b7 658 attr, v);
515106fa
JH
659 *n = v;
660 rem--;
ec775c41 661 rem = macroexpand_one(attr->attr_nr, rem);
515106fa
JH
662 }
663 }
664 return rem;
665}
666
bd2f371d 667static int fill(const char *path, int pathlen, int basename_offset,
4742d136 668 struct attr_stack *stk, int rem)
d0bfd026 669{
515106fa 670 int i;
d0bfd026
JH
671 const char *base = stk->origin ? stk->origin : "";
672
673 for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) {
674 struct match_attr *a = stk->attrs[i];
f48fd688
JH
675 if (a->is_macro)
676 continue;
bd2f371d 677 if (path_matches(path, pathlen, basename_offset,
82dce998 678 &a->u.pat, base, stk->originlen))
515106fa 679 rem = fill_one("fill", a, rem);
d0bfd026
JH
680 }
681 return rem;
682}
683
ec775c41 684static int macroexpand_one(int attr_nr, int rem)
f48fd688 685{
ec775c41
HG
686 struct attr_stack *stk;
687 struct match_attr *a = NULL;
515106fa 688 int i;
f48fd688 689
ec775c41
HG
690 if (check_all_attr[attr_nr].value != ATTR__TRUE)
691 return rem;
692
693 for (stk = attr_stack; !a && stk; stk = stk->prev)
694 for (i = stk->num_matches - 1; !a && 0 <= i; i--) {
695 struct match_attr *ma = stk->attrs[i];
696 if (!ma->is_macro)
697 continue;
698 if (ma->u.attr->attr_nr == attr_nr)
699 a = ma;
700 }
701
702 if (a)
515106fa 703 rem = fill_one("expand", a, rem);
ec775c41 704
f48fd688
JH
705 return rem;
706}
707
2d721744
MH
708/*
709 * Collect all attributes for path into the array pointed to by
710 * check_all_attr.
711 */
712static void collect_all_attrs(const char *path)
d0bfd026
JH
713{
714 struct attr_stack *stk;
9db9eecf 715 int i, pathlen, rem, dirlen;
bd2f371d
JH
716 const char *cp, *last_slash = NULL;
717 int basename_offset;
9db9eecf
NTND
718
719 for (cp = path; *cp; cp++) {
720 if (*cp == '/' && cp[1])
721 last_slash = cp;
722 }
723 pathlen = cp - path;
724 if (last_slash) {
bd2f371d 725 basename_offset = last_slash + 1 - path;
9db9eecf
NTND
726 dirlen = last_slash - path;
727 } else {
bd2f371d 728 basename_offset = 0;
9db9eecf
NTND
729 dirlen = 0;
730 }
d0bfd026 731
9db9eecf 732 prepare_attr_stack(path, dirlen);
f48fd688 733 for (i = 0; i < attr_nr; i++)
515106fa 734 check_all_attr[i].value = ATTR__UNKNOWN;
d0bfd026 735
f48fd688
JH
736 rem = attr_nr;
737 for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
bd2f371d 738 rem = fill(path, pathlen, basename_offset, stk, rem);
2d721744
MH
739}
740
d932f4eb 741int git_check_attr(const char *path, int num, struct git_attr_check *check)
2d721744
MH
742{
743 int i;
744
745 collect_all_attrs(path);
f48fd688 746
515106fa 747 for (i = 0; i < num; i++) {
a5e92abd 748 const char *value = check_all_attr[check[i].attr->attr_nr].value;
515106fa
JH
749 if (value == ATTR__UNKNOWN)
750 value = ATTR__UNSET;
751 check[i].value = value;
752 }
f48fd688 753
d0bfd026
JH
754 return 0;
755}
06f33c17 756
ee548df3
MH
757int git_all_attrs(const char *path, int *num, struct git_attr_check **check)
758{
759 int i, count, j;
760
761 collect_all_attrs(path);
762
763 /* Count the number of attributes that are set. */
764 count = 0;
765 for (i = 0; i < attr_nr; i++) {
766 const char *value = check_all_attr[i].value;
767 if (value != ATTR__UNSET && value != ATTR__UNKNOWN)
768 ++count;
769 }
770 *num = count;
771 *check = xmalloc(sizeof(**check) * count);
772 j = 0;
773 for (i = 0; i < attr_nr; i++) {
774 const char *value = check_all_attr[i].value;
775 if (value != ATTR__UNSET && value != ATTR__UNKNOWN) {
776 (*check)[j].attr = check_all_attr[i].attr;
777 (*check)[j].value = value;
778 ++j;
779 }
780 }
781
782 return 0;
783}
784
06f33c17
JH
785void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate)
786{
787 enum git_attr_direction old = direction;
4191e80a
NTND
788
789 if (is_bare_repository() && new != GIT_ATTR_INDEX)
790 die("BUG: non-INDEX attr direction in a bare repo");
791
06f33c17
JH
792 direction = new;
793 if (new != old)
794 drop_attr_stack();
795 use_index = istate;
796}