2 * Handle git attributes. See gitattributes(5) for a description of
3 * the file syntax, and attr.h for a description of the API.
5 * One basic design decision here is that we are not going to support
6 * an insanely large number of attributes.
16 #include "thread-utils.h"
18 const char git_attr__true[] = "(builtin)true";
19 const char git_attr__false[] = "\0(builtin)false";
20 static const char git_attr__unknown[] = "(builtin)unknown";
21 #define ATTR__TRUE git_attr__true
22 #define ATTR__FALSE git_attr__false
23 #define ATTR__UNSET NULL
24 #define ATTR__UNKNOWN git_attr__unknown
31 int attr_nr; /* unique attribute number */
32 char name[FLEX_ARRAY]; /* attribute name */
35 const char *git_attr_name(const struct git_attr *attr)
42 pthread_mutex_t mutex;
45 static inline void hashmap_lock(struct attr_hashmap *map)
47 pthread_mutex_lock(&map->mutex);
50 static inline void hashmap_unlock(struct attr_hashmap *map)
52 pthread_mutex_unlock(&map->mutex);
55 /* The container for objects stored in "struct attr_hashmap" */
56 struct attr_hash_entry {
57 struct hashmap_entry ent;
58 const char *key; /* the key; memory should be owned by value */
59 size_t keylen; /* length of the key */
60 void *value; /* the stored value */
63 /* attr_hashmap comparison function */
64 static int attr_hash_entry_cmp(const void *unused_cmp_data,
65 const struct hashmap_entry *eptr,
66 const struct hashmap_entry *entry_or_key,
67 const void *unused_keydata)
69 const struct attr_hash_entry *a, *b;
71 a = container_of(eptr, const struct attr_hash_entry, ent);
72 b = container_of(entry_or_key, const struct attr_hash_entry, ent);
73 return (a->keylen != b->keylen) || strncmp(a->key, b->key, a->keylen);
77 * The global dictionary of all interned attributes. This
78 * is a singleton object which is shared between threads.
79 * Access to this dictionary must be surrounded with a mutex.
81 static struct attr_hashmap g_attr_hashmap = {
82 HASHMAP_INIT(attr_hash_entry_cmp, NULL)
86 * Retrieve the 'value' stored in a hashmap given the provided 'key'.
87 * If there is no matching entry, return NULL.
89 static void *attr_hashmap_get(struct attr_hashmap *map,
90 const char *key, size_t keylen)
92 struct attr_hash_entry k;
93 struct attr_hash_entry *e;
95 hashmap_entry_init(&k.ent, memhash(key, keylen));
98 e = hashmap_get_entry(&map->map, &k, ent, NULL);
100 return e ? e->value : NULL;
103 /* Add 'value' to a hashmap based on the provided 'key'. */
104 static void attr_hashmap_add(struct attr_hashmap *map,
105 const char *key, size_t keylen,
108 struct attr_hash_entry *e;
110 e = xmalloc(sizeof(struct attr_hash_entry));
111 hashmap_entry_init(&e->ent, memhash(key, keylen));
116 hashmap_add(&map->map, &e->ent);
119 struct all_attrs_item {
120 const struct git_attr *attr;
123 * If 'macro' is non-NULL, indicates that 'attr' is a macro based on
124 * the current attribute stack and contains a pointer to the match_attr
125 * definition of the macro
127 const struct match_attr *macro;
131 * Reallocate and reinitialize the array of all attributes (which is used in
132 * the attribute collection process) in 'check' based on the global dictionary
135 static void all_attrs_init(struct attr_hashmap *map, struct attr_check *check)
142 size = hashmap_get_size(&map->map);
143 if (size < check->all_attrs_nr)
144 BUG("interned attributes shouldn't be deleted");
147 * If the number of attributes in the global dictionary has increased
148 * (or this attr_check instance doesn't have an initialized all_attrs
149 * field), reallocate the provided attr_check instance's all_attrs
150 * field and fill each entry with its corresponding git_attr.
152 if (size != check->all_attrs_nr) {
153 struct attr_hash_entry *e;
154 struct hashmap_iter iter;
156 REALLOC_ARRAY(check->all_attrs, size);
157 check->all_attrs_nr = size;
159 hashmap_for_each_entry(&map->map, &iter, e,
160 ent /* member name */) {
161 const struct git_attr *a = e->value;
162 check->all_attrs[a->attr_nr].attr = a;
169 * Re-initialize every entry in check->all_attrs.
170 * This re-initialization can live outside of the locked region since
171 * the attribute dictionary is no longer being accessed.
173 for (i = 0; i < check->all_attrs_nr; i++) {
174 check->all_attrs[i].value = ATTR__UNKNOWN;
175 check->all_attrs[i].macro = NULL;
179 static int attr_name_valid(const char *name, size_t namelen)
182 * Attribute name cannot begin with '-' and must consist of
183 * characters from [-A-Za-z0-9_.].
185 if (namelen <= 0 || *name == '-')
189 if (! (ch == '-' || ch == '.' || ch == '_' ||
190 ('0' <= ch && ch <= '9') ||
191 ('a' <= ch && ch <= 'z') ||
192 ('A' <= ch && ch <= 'Z')) )
198 static void report_invalid_attr(const char *name, size_t len,
199 const char *src, int lineno)
201 struct strbuf err = STRBUF_INIT;
202 strbuf_addf(&err, _("%.*s is not a valid attribute name"),
204 fprintf(stderr, "%s: %s:%d\n", err.buf, src, lineno);
205 strbuf_release(&err);
209 * Given a 'name', lookup and return the corresponding attribute in the global
210 * dictionary. If no entry is found, create a new attribute and store it in
213 static const struct git_attr *git_attr_internal(const char *name, int namelen)
217 if (!attr_name_valid(name, namelen))
220 hashmap_lock(&g_attr_hashmap);
222 a = attr_hashmap_get(&g_attr_hashmap, name, namelen);
225 FLEX_ALLOC_MEM(a, name, name, namelen);
226 a->attr_nr = hashmap_get_size(&g_attr_hashmap.map);
228 attr_hashmap_add(&g_attr_hashmap, a->name, namelen, a);
230 (hashmap_get_size(&g_attr_hashmap.map) - 1));
233 hashmap_unlock(&g_attr_hashmap);
238 const struct git_attr *git_attr(const char *name)
240 return git_attr_internal(name, strlen(name));
243 /* What does a matched pattern decide? */
245 const struct git_attr *attr;
253 unsigned flags; /* PATTERN_FLAG_* */
257 * One rule, as from a .gitattributes file.
259 * If is_macro is true, then u.attr is a pointer to the git_attr being
262 * If is_macro is false, then u.pat is the filename pattern to which the
265 * In either case, num_attr is the number of attributes affected by
266 * this rule, and state is an array listing them. The attributes are
267 * listed as they appear in the file (macros unexpanded).
272 const struct git_attr *attr;
276 struct attr_state state[FLEX_ARRAY];
279 static const char blank[] = " \t\r\n";
282 * Parse a whitespace-delimited attribute state (i.e., "attr",
283 * "-attr", "!attr", or "attr=value") from the string starting at src.
284 * If e is not NULL, write the results to *e. Return a pointer to the
285 * remainder of the string (with leading whitespace removed), or NULL
286 * if there was an error.
288 static const char *parse_attr(const char *src, int lineno, const char *cp,
289 struct attr_state *e)
291 const char *ep, *equals;
294 ep = cp + strcspn(cp, blank);
295 equals = strchr(cp, '=');
296 if (equals && ep < equals)
303 if (*cp == '-' || *cp == '!') {
307 if (!attr_name_valid(cp, len)) {
308 report_invalid_attr(cp, len, src, lineno);
313 * As this function is always called twice, once with
314 * e == NULL in the first pass and then e != NULL in
315 * the second pass, no need for attr_name_valid()
318 if (*cp == '-' || *cp == '!') {
319 e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;
324 e->setto = ATTR__TRUE;
326 e->setto = xmemdupz(equals + 1, ep - equals - 1);
328 e->attr = git_attr_internal(cp, len);
330 return ep + strspn(ep, blank);
333 static struct match_attr *parse_attr_line(const char *line, const char *src,
334 int lineno, int macro_ok)
338 const char *cp, *name, *states;
339 struct match_attr *res = NULL;
341 struct strbuf pattern = STRBUF_INIT;
343 cp = line + strspn(line, blank);
344 if (!*cp || *cp == '#')
348 if (*cp == '"' && !unquote_c_style(&pattern, name, &states)) {
350 namelen = pattern.len;
352 namelen = strcspn(name, blank);
353 states = name + namelen;
356 if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
357 starts_with(name, ATTRIBUTE_MACRO_PREFIX)) {
359 fprintf_ln(stderr, _("%s not allowed: %s:%d"),
364 name += strlen(ATTRIBUTE_MACRO_PREFIX);
365 name += strspn(name, blank);
366 namelen = strcspn(name, blank);
367 if (!attr_name_valid(name, namelen)) {
368 report_invalid_attr(name, namelen, src, lineno);
375 states += strspn(states, blank);
377 /* First pass to count the attr_states */
378 for (cp = states, num_attr = 0; *cp; num_attr++) {
379 cp = parse_attr(src, lineno, cp, NULL);
386 sizeof(struct attr_state) * num_attr +
387 (is_macro ? 0 : namelen + 1));
389 res->u.attr = git_attr_internal(name, namelen);
391 char *p = (char *)&(res->state[num_attr]);
392 memcpy(p, name, namelen);
393 res->u.pat.pattern = p;
394 parse_path_pattern(&res->u.pat.pattern,
395 &res->u.pat.patternlen,
397 &res->u.pat.nowildcardlen);
398 if (res->u.pat.flags & PATTERN_FLAG_NEGATIVE) {
399 warning(_("Negative patterns are ignored in git attributes\n"
400 "Use '\\!' for literal leading exclamation."));
404 res->is_macro = is_macro;
405 res->num_attr = num_attr;
407 /* Second pass to fill the attr_states */
408 for (cp = states, i = 0; *cp; i++) {
409 cp = parse_attr(src, lineno, cp, &(res->state[i]));
412 strbuf_release(&pattern);
416 strbuf_release(&pattern);
422 * Like info/exclude and .gitignore, the attribute information can
423 * come from many places.
425 * (1) .gitattributes file of the same directory;
426 * (2) .gitattributes file of the parent directory if (1) does not have
427 * any match; this goes recursively upwards, just like .gitignore.
428 * (3) $GIT_DIR/info/attributes, which overrides both of the above.
430 * In the same file, later entries override the earlier match, so in the
431 * global list, we would have entries from info/attributes the earliest
432 * (reading the file from top to bottom), .gitattributes of the root
433 * directory (again, reading the file from top to bottom) down to the
434 * current directory, and then scan the list backwards to find the first match.
435 * This is exactly the same as what is_excluded() does in dir.c to deal with
436 * .gitignore file and info/excludes file as a fallback.
440 struct attr_stack *prev;
443 unsigned num_matches;
445 struct match_attr **attrs;
448 static void attr_stack_free(struct attr_stack *e)
452 for (i = 0; i < e->num_matches; i++) {
453 struct match_attr *a = e->attrs[i];
455 for (j = 0; j < a->num_attr; j++) {
456 const char *setto = a->state[j].setto;
457 if (setto == ATTR__TRUE ||
458 setto == ATTR__FALSE ||
459 setto == ATTR__UNSET ||
460 setto == ATTR__UNKNOWN)
463 free((char *) setto);
471 static void drop_attr_stack(struct attr_stack **stack)
474 struct attr_stack *elem = *stack;
476 attr_stack_free(elem);
480 /* List of all attr_check structs; access should be surrounded by mutex */
481 static struct check_vector {
484 struct attr_check **checks;
485 pthread_mutex_t mutex;
488 static inline void vector_lock(void)
490 pthread_mutex_lock(&check_vector.mutex);
493 static inline void vector_unlock(void)
495 pthread_mutex_unlock(&check_vector.mutex);
498 static void check_vector_add(struct attr_check *c)
502 ALLOC_GROW(check_vector.checks,
505 check_vector.checks[check_vector.nr++] = c;
510 static void check_vector_remove(struct attr_check *check)
517 for (i = 0; i < check_vector.nr; i++)
518 if (check_vector.checks[i] == check)
521 if (i >= check_vector.nr)
522 BUG("no entry found");
524 /* shift entries over */
525 for (; i < check_vector.nr - 1; i++)
526 check_vector.checks[i] = check_vector.checks[i + 1];
533 /* Iterate through all attr_check instances and drop their stacks */
534 static void drop_all_attr_stacks(void)
540 for (i = 0; i < check_vector.nr; i++) {
541 drop_attr_stack(&check_vector.checks[i]->stack);
547 struct attr_check *attr_check_alloc(void)
549 struct attr_check *c = xcalloc(1, sizeof(struct attr_check));
551 /* save pointer to the check struct */
557 struct attr_check *attr_check_initl(const char *one, ...)
559 struct attr_check *check;
564 va_start(params, one);
565 for (cnt = 1; (param = va_arg(params, const char *)) != NULL; cnt++)
569 check = attr_check_alloc();
572 CALLOC_ARRAY(check->items, cnt);
574 check->items[0].attr = git_attr(one);
575 va_start(params, one);
576 for (cnt = 1; cnt < check->nr; cnt++) {
577 const struct git_attr *attr;
578 param = va_arg(params, const char *);
580 BUG("counted %d != ended at %d",
582 attr = git_attr(param);
584 BUG("%s: not a valid attribute name", param);
585 check->items[cnt].attr = attr;
591 struct attr_check *attr_check_dup(const struct attr_check *check)
593 struct attr_check *ret;
598 ret = attr_check_alloc();
601 ret->alloc = check->alloc;
602 ALLOC_ARRAY(ret->items, ret->nr);
603 COPY_ARRAY(ret->items, check->items, ret->nr);
608 struct attr_check_item *attr_check_append(struct attr_check *check,
609 const struct git_attr *attr)
611 struct attr_check_item *item;
613 ALLOC_GROW(check->items, check->nr + 1, check->alloc);
614 item = &check->items[check->nr++];
619 void attr_check_reset(struct attr_check *check)
624 void attr_check_clear(struct attr_check *check)
626 FREE_AND_NULL(check->items);
630 FREE_AND_NULL(check->all_attrs);
631 check->all_attrs_nr = 0;
633 drop_attr_stack(&check->stack);
636 void attr_check_free(struct attr_check *check)
639 /* Remove check from the check vector */
640 check_vector_remove(check);
642 attr_check_clear(check);
647 static const char *builtin_attr[] = {
648 "[attr]binary -diff -merge -text",
652 static void handle_attr_line(struct attr_stack *res,
658 struct match_attr *a;
660 a = parse_attr_line(line, src, lineno, macro_ok);
663 ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc);
664 res->attrs[res->num_matches++] = a;
667 static struct attr_stack *read_attr_from_array(const char **list)
669 struct attr_stack *res;
673 CALLOC_ARRAY(res, 1);
674 while ((line = *(list++)) != NULL)
675 handle_attr_line(res, line, "[builtin]", ++lineno, 1);
680 * Callers into the attribute system assume there is a single, system-wide
681 * global state where attributes are read from and when the state is flipped by
682 * calling git_attr_set_direction(), the stack frames that have been
683 * constructed need to be discarded so so that subsequent calls into the
684 * attribute system will lazily read from the right place. Since changing
685 * direction causes a global paradigm shift, it should not ever be called while
686 * another thread could potentially be calling into the attribute system.
688 static enum git_attr_direction direction;
690 void git_attr_set_direction(enum git_attr_direction new_direction)
692 if (is_bare_repository() && new_direction != GIT_ATTR_INDEX)
693 BUG("non-INDEX attr direction in a bare repo");
695 if (new_direction != direction)
696 drop_all_attr_stacks();
698 direction = new_direction;
701 static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
703 FILE *fp = fopen_or_warn(path, "r");
704 struct attr_stack *res;
710 CALLOC_ARRAY(res, 1);
711 while (fgets(buf, sizeof(buf), fp)) {
714 skip_utf8_bom(&bufp, strlen(bufp));
715 handle_attr_line(res, bufp, path, ++lineno, macro_ok);
721 static struct attr_stack *read_attr_from_index(const struct index_state *istate,
725 struct attr_stack *res;
732 buf = read_blob_data_from_index(istate, path, NULL);
736 CALLOC_ARRAY(res, 1);
737 for (sp = buf; *sp; ) {
741 ep = strchrnul(sp, '\n');
742 more = (*ep == '\n');
744 handle_attr_line(res, sp, path, ++lineno, macro_ok);
751 static struct attr_stack *read_attr(const struct index_state *istate,
752 const char *path, int macro_ok)
754 struct attr_stack *res = NULL;
756 if (direction == GIT_ATTR_INDEX) {
757 res = read_attr_from_index(istate, path, macro_ok);
758 } else if (!is_bare_repository()) {
759 if (direction == GIT_ATTR_CHECKOUT) {
760 res = read_attr_from_index(istate, path, macro_ok);
762 res = read_attr_from_file(path, macro_ok);
763 } else if (direction == GIT_ATTR_CHECKIN) {
764 res = read_attr_from_file(path, macro_ok);
767 * There is no checked out .gitattributes file
768 * there, but we might have it in the index.
769 * We allow operation in a sparsely checked out
770 * work tree, so read from it.
772 res = read_attr_from_index(istate, path, macro_ok);
777 CALLOC_ARRAY(res, 1);
782 static void debug_info(const char *what, struct attr_stack *elem)
784 fprintf(stderr, "%s: %s\n", what, elem->origin ? elem->origin : "()");
786 static void debug_set(const char *what, const char *match, struct git_attr *attr, const void *v)
788 const char *value = v;
790 if (ATTR_TRUE(value))
792 else if (ATTR_FALSE(value))
794 else if (ATTR_UNSET(value))
795 value = "unspecified";
797 fprintf(stderr, "%s: %s => %s (%s)\n",
798 what, attr->name, (char *) value, match);
800 #define debug_push(a) debug_info("push", (a))
801 #define debug_pop(a) debug_info("pop", (a))
803 #define debug_push(a) do { ; } while (0)
804 #define debug_pop(a) do { ; } while (0)
805 #define debug_set(a,b,c,d) do { ; } while (0)
806 #endif /* DEBUG_ATTR */
808 static const char *git_etc_gitattributes(void)
810 static const char *system_wide;
812 system_wide = system_path(ETC_GITATTRIBUTES);
816 static const char *get_home_gitattributes(void)
818 if (!git_attributes_file)
819 git_attributes_file = xdg_config_home("attributes");
821 return git_attributes_file;
824 static int git_attr_system(void)
826 return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
829 static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE)
831 static void push_stack(struct attr_stack **attr_stack_p,
832 struct attr_stack *elem, char *origin, size_t originlen)
835 elem->origin = origin;
837 elem->originlen = originlen;
838 elem->prev = *attr_stack_p;
839 *attr_stack_p = elem;
843 static void bootstrap_attr_stack(const struct index_state *istate,
844 struct attr_stack **stack)
846 struct attr_stack *e;
852 e = read_attr_from_array(builtin_attr);
853 push_stack(stack, e, NULL, 0);
855 /* system-wide frame */
856 if (git_attr_system()) {
857 e = read_attr_from_file(git_etc_gitattributes(), 1);
858 push_stack(stack, e, NULL, 0);
862 if (get_home_gitattributes()) {
863 e = read_attr_from_file(get_home_gitattributes(), 1);
864 push_stack(stack, e, NULL, 0);
868 e = read_attr(istate, GITATTRIBUTES_FILE, 1);
869 push_stack(stack, e, xstrdup(""), 0);
872 if (startup_info->have_repository)
873 e = read_attr_from_file(git_path_info_attributes(), 1);
878 push_stack(stack, e, NULL, 0);
881 static void prepare_attr_stack(const struct index_state *istate,
882 const char *path, int dirlen,
883 struct attr_stack **stack)
885 struct attr_stack *info;
886 struct strbuf pathbuf = STRBUF_INIT;
889 * At the bottom of the attribute stack is the built-in
890 * set of attribute definitions, followed by the contents
891 * of $(prefix)/etc/gitattributes and a file specified by
892 * core.attributesfile. Then, contents from
893 * .gitattributes files from directories closer to the
894 * root to the ones in deeper directories are pushed
895 * to the stack. Finally, at the very top of the stack
896 * we always keep the contents of $GIT_DIR/info/attributes.
898 * When checking, we use entries from near the top of the
899 * stack, preferring $GIT_DIR/info/attributes, then
900 * .gitattributes in deeper directories to shallower ones,
901 * and finally use the built-in set as the default.
903 bootstrap_attr_stack(istate, stack);
906 * Pop the "info" one that is always at the top of the stack.
912 * Pop the ones from directories that are not the prefix of
913 * the path we are checking. Break out of the loop when we see
914 * the root one (whose origin is an empty string "") or the builtin
915 * one (whose origin is NULL) without popping it.
917 while ((*stack)->origin) {
918 int namelen = (*stack)->originlen;
919 struct attr_stack *elem;
922 if (namelen <= dirlen &&
923 !strncmp(elem->origin, path, namelen) &&
924 (!namelen || path[namelen] == '/'))
929 attr_stack_free(elem);
933 * bootstrap_attr_stack() should have added, and the
934 * above loop should have stopped before popping, the
935 * root element whose attr_stack->origin is set to an
938 assert((*stack)->origin);
940 strbuf_addstr(&pathbuf, (*stack)->origin);
941 /* Build up to the directory 'path' is in */
942 while (pathbuf.len < dirlen) {
943 size_t len = pathbuf.len;
944 struct attr_stack *next;
947 /* Skip path-separator */
948 if (len < dirlen && is_dir_sep(path[len]))
950 /* Find the end of the next component */
951 while (len < dirlen && !is_dir_sep(path[len]))
955 strbuf_addch(&pathbuf, '/');
956 strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len));
957 strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE);
959 next = read_attr(istate, pathbuf.buf, 0);
961 /* reset the pathbuf to not include "/.gitattributes" */
962 strbuf_setlen(&pathbuf, len);
964 origin = xstrdup(pathbuf.buf);
965 push_stack(stack, next, origin, len);
969 * Finally push the "info" one at the top of the stack.
971 push_stack(stack, info, NULL, 0);
973 strbuf_release(&pathbuf);
976 static int path_matches(const char *pathname, int pathlen,
978 const struct pattern *pat,
979 const char *base, int baselen)
981 const char *pattern = pat->pattern;
982 int prefix = pat->nowildcardlen;
983 int isdir = (pathlen && pathname[pathlen - 1] == '/');
985 if ((pat->flags & PATTERN_FLAG_MUSTBEDIR) && !isdir)
988 if (pat->flags & PATTERN_FLAG_NODIR) {
989 return match_basename(pathname + basename_offset,
990 pathlen - basename_offset - isdir,
992 pat->patternlen, pat->flags);
994 return match_pathname(pathname, pathlen - isdir,
996 pattern, prefix, pat->patternlen, pat->flags);
999 static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem);
1001 static int fill_one(const char *what, struct all_attrs_item *all_attrs,
1002 const struct match_attr *a, int rem)
1006 for (i = a->num_attr - 1; rem > 0 && i >= 0; i--) {
1007 const struct git_attr *attr = a->state[i].attr;
1008 const char **n = &(all_attrs[attr->attr_nr].value);
1009 const char *v = a->state[i].setto;
1011 if (*n == ATTR__UNKNOWN) {
1013 a->is_macro ? a->u.attr->name : a->u.pat.pattern,
1017 rem = macroexpand_one(all_attrs, attr->attr_nr, rem);
1023 static int fill(const char *path, int pathlen, int basename_offset,
1024 const struct attr_stack *stack,
1025 struct all_attrs_item *all_attrs, int rem)
1027 for (; rem > 0 && stack; stack = stack->prev) {
1029 const char *base = stack->origin ? stack->origin : "";
1031 for (i = stack->num_matches - 1; 0 < rem && 0 <= i; i--) {
1032 const struct match_attr *a = stack->attrs[i];
1035 if (path_matches(path, pathlen, basename_offset,
1036 &a->u.pat, base, stack->originlen))
1037 rem = fill_one("fill", all_attrs, a, rem);
1044 static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem)
1046 const struct all_attrs_item *item = &all_attrs[nr];
1048 if (item->macro && item->value == ATTR__TRUE)
1049 return fill_one("expand", all_attrs, item->macro, rem);
1055 * Marks the attributes which are macros based on the attribute stack.
1056 * This prevents having to search through the attribute stack each time
1057 * a macro needs to be expanded during the fill stage.
1059 static void determine_macros(struct all_attrs_item *all_attrs,
1060 const struct attr_stack *stack)
1062 for (; stack; stack = stack->prev) {
1064 for (i = stack->num_matches - 1; i >= 0; i--) {
1065 const struct match_attr *ma = stack->attrs[i];
1067 int n = ma->u.attr->attr_nr;
1068 if (!all_attrs[n].macro) {
1069 all_attrs[n].macro = ma;
1077 * Collect attributes for path into the array pointed to by check->all_attrs.
1078 * If check->check_nr is non-zero, only attributes in check[] are collected.
1079 * Otherwise all attributes are collected.
1081 static void collect_some_attrs(const struct index_state *istate,
1083 struct attr_check *check)
1085 int pathlen, rem, dirlen;
1086 const char *cp, *last_slash = NULL;
1087 int basename_offset;
1089 for (cp = path; *cp; cp++) {
1090 if (*cp == '/' && cp[1])
1093 pathlen = cp - path;
1095 basename_offset = last_slash + 1 - path;
1096 dirlen = last_slash - path;
1098 basename_offset = 0;
1102 prepare_attr_stack(istate, path, dirlen, &check->stack);
1103 all_attrs_init(&g_attr_hashmap, check);
1104 determine_macros(check->all_attrs, check->stack);
1106 rem = check->all_attrs_nr;
1107 fill(path, pathlen, basename_offset, check->stack, check->all_attrs, rem);
1110 void git_check_attr(const struct index_state *istate,
1112 struct attr_check *check)
1116 collect_some_attrs(istate, path, check);
1118 for (i = 0; i < check->nr; i++) {
1119 size_t n = check->items[i].attr->attr_nr;
1120 const char *value = check->all_attrs[n].value;
1121 if (value == ATTR__UNKNOWN)
1122 value = ATTR__UNSET;
1123 check->items[i].value = value;
1127 void git_all_attrs(const struct index_state *istate,
1128 const char *path, struct attr_check *check)
1132 attr_check_reset(check);
1133 collect_some_attrs(istate, path, check);
1135 for (i = 0; i < check->all_attrs_nr; i++) {
1136 const char *name = check->all_attrs[i].attr->name;
1137 const char *value = check->all_attrs[i].value;
1138 struct attr_check_item *item;
1139 if (value == ATTR__UNSET || value == ATTR__UNKNOWN)
1141 item = attr_check_append(check, git_attr(name));
1142 item->value = value;
1146 void attr_start(void)
1148 pthread_mutex_init(&g_attr_hashmap.mutex, NULL);
1149 pthread_mutex_init(&check_vector.mutex, NULL);