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.
6 * One basic design decision here is that we are not going to support
7 * an insanely large number of attributes.
17 #include "thread-utils.h"
19 const char git_attr__true
[] = "(builtin)true";
20 const char git_attr__false
[] = "\0(builtin)false";
21 static const char git_attr__unknown
[] = "(builtin)unknown";
22 #define ATTR__TRUE git_attr__true
23 #define ATTR__FALSE git_attr__false
24 #define ATTR__UNSET NULL
25 #define ATTR__UNKNOWN git_attr__unknown
32 int attr_nr
; /* unique attribute number */
33 char name
[FLEX_ARRAY
]; /* attribute name */
36 const char *git_attr_name(const struct git_attr
*attr
)
43 pthread_mutex_t mutex
;
46 static inline void hashmap_lock(struct attr_hashmap
*map
)
48 pthread_mutex_lock(&map
->mutex
);
51 static inline void hashmap_unlock(struct attr_hashmap
*map
)
53 pthread_mutex_unlock(&map
->mutex
);
57 * The global dictionary of all interned attributes. This
58 * is a singleton object which is shared between threads.
59 * Access to this dictionary must be surrounded with a mutex.
61 static struct attr_hashmap g_attr_hashmap
;
63 /* The container for objects stored in "struct attr_hashmap" */
64 struct attr_hash_entry
{
65 struct hashmap_entry ent
; /* must be the first member! */
66 const char *key
; /* the key; memory should be owned by value */
67 size_t keylen
; /* length of the key */
68 void *value
; /* the stored value */
71 /* attr_hashmap comparison function */
72 static int attr_hash_entry_cmp(const void *unused_cmp_data
,
73 const struct hashmap_entry
*eptr
,
74 const struct hashmap_entry
*entry_or_key
,
75 const void *unused_keydata
)
77 const struct attr_hash_entry
*a
, *b
;
79 a
= container_of(eptr
, const struct attr_hash_entry
, ent
);
80 b
= container_of(entry_or_key
, const struct attr_hash_entry
, ent
);
81 return (a
->keylen
!= b
->keylen
) || strncmp(a
->key
, b
->key
, a
->keylen
);
84 /* Initialize an 'attr_hashmap' object */
85 static void attr_hashmap_init(struct attr_hashmap
*map
)
87 hashmap_init(&map
->map
, attr_hash_entry_cmp
, NULL
, 0);
91 * Retrieve the 'value' stored in a hashmap given the provided 'key'.
92 * If there is no matching entry, return NULL.
94 static void *attr_hashmap_get(struct attr_hashmap
*map
,
95 const char *key
, size_t keylen
)
97 struct attr_hash_entry k
;
98 struct attr_hash_entry
*e
;
100 if (!map
->map
.tablesize
)
101 attr_hashmap_init(map
);
103 hashmap_entry_init(&k
.ent
, memhash(key
, keylen
));
106 e
= hashmap_get_entry(&map
->map
, &k
, NULL
, struct attr_hash_entry
, ent
);
108 return e
? e
->value
: NULL
;
111 /* Add 'value' to a hashmap based on the provided 'key'. */
112 static void attr_hashmap_add(struct attr_hashmap
*map
,
113 const char *key
, size_t keylen
,
116 struct attr_hash_entry
*e
;
118 if (!map
->map
.tablesize
)
119 attr_hashmap_init(map
);
121 e
= xmalloc(sizeof(struct attr_hash_entry
));
122 hashmap_entry_init(&e
->ent
, memhash(key
, keylen
));
127 hashmap_add(&map
->map
, &e
->ent
);
130 struct all_attrs_item
{
131 const struct git_attr
*attr
;
134 * If 'macro' is non-NULL, indicates that 'attr' is a macro based on
135 * the current attribute stack and contains a pointer to the match_attr
136 * definition of the macro
138 const struct match_attr
*macro
;
142 * Reallocate and reinitialize the array of all attributes (which is used in
143 * the attribute collection process) in 'check' based on the global dictionary
146 static void all_attrs_init(struct attr_hashmap
*map
, struct attr_check
*check
)
153 size
= hashmap_get_size(&map
->map
);
154 if (size
< check
->all_attrs_nr
)
155 BUG("interned attributes shouldn't be deleted");
158 * If the number of attributes in the global dictionary has increased
159 * (or this attr_check instance doesn't have an initialized all_attrs
160 * field), reallocate the provided attr_check instance's all_attrs
161 * field and fill each entry with its corresponding git_attr.
163 if (size
!= check
->all_attrs_nr
) {
164 struct attr_hash_entry
*e
;
165 struct hashmap_iter iter
;
167 REALLOC_ARRAY(check
->all_attrs
, size
);
168 check
->all_attrs_nr
= size
;
170 hashmap_for_each_entry(&map
->map
, &iter
, e
,
171 struct attr_hash_entry
,
172 ent
/* member name */) {
173 const struct git_attr
*a
= e
->value
;
174 check
->all_attrs
[a
->attr_nr
].attr
= a
;
181 * Re-initialize every entry in check->all_attrs.
182 * This re-initialization can live outside of the locked region since
183 * the attribute dictionary is no longer being accessed.
185 for (i
= 0; i
< check
->all_attrs_nr
; i
++) {
186 check
->all_attrs
[i
].value
= ATTR__UNKNOWN
;
187 check
->all_attrs
[i
].macro
= NULL
;
191 static int attr_name_valid(const char *name
, size_t namelen
)
194 * Attribute name cannot begin with '-' and must consist of
195 * characters from [-A-Za-z0-9_.].
197 if (namelen
<= 0 || *name
== '-')
201 if (! (ch
== '-' || ch
== '.' || ch
== '_' ||
202 ('0' <= ch
&& ch
<= '9') ||
203 ('a' <= ch
&& ch
<= 'z') ||
204 ('A' <= ch
&& ch
<= 'Z')) )
210 static void report_invalid_attr(const char *name
, size_t len
,
211 const char *src
, int lineno
)
213 struct strbuf err
= STRBUF_INIT
;
214 strbuf_addf(&err
, _("%.*s is not a valid attribute name"),
216 fprintf(stderr
, "%s: %s:%d\n", err
.buf
, src
, lineno
);
217 strbuf_release(&err
);
221 * Given a 'name', lookup and return the corresponding attribute in the global
222 * dictionary. If no entry is found, create a new attribute and store it in
225 static const struct git_attr
*git_attr_internal(const char *name
, int namelen
)
229 if (!attr_name_valid(name
, namelen
))
232 hashmap_lock(&g_attr_hashmap
);
234 a
= attr_hashmap_get(&g_attr_hashmap
, name
, namelen
);
237 FLEX_ALLOC_MEM(a
, name
, name
, namelen
);
238 a
->attr_nr
= hashmap_get_size(&g_attr_hashmap
.map
);
240 attr_hashmap_add(&g_attr_hashmap
, a
->name
, namelen
, a
);
242 (hashmap_get_size(&g_attr_hashmap
.map
) - 1));
245 hashmap_unlock(&g_attr_hashmap
);
250 const struct git_attr
*git_attr(const char *name
)
252 return git_attr_internal(name
, strlen(name
));
255 /* What does a matched pattern decide? */
257 const struct git_attr
*attr
;
265 unsigned flags
; /* EXC_FLAG_* */
269 * One rule, as from a .gitattributes file.
271 * If is_macro is true, then u.attr is a pointer to the git_attr being
274 * If is_macro is false, then u.pat is the filename pattern to which the
277 * In either case, num_attr is the number of attributes affected by
278 * this rule, and state is an array listing them. The attributes are
279 * listed as they appear in the file (macros unexpanded).
284 const struct git_attr
*attr
;
288 struct attr_state state
[FLEX_ARRAY
];
291 static const char blank
[] = " \t\r\n";
294 * Parse a whitespace-delimited attribute state (i.e., "attr",
295 * "-attr", "!attr", or "attr=value") from the string starting at src.
296 * If e is not NULL, write the results to *e. Return a pointer to the
297 * remainder of the string (with leading whitespace removed), or NULL
298 * if there was an error.
300 static const char *parse_attr(const char *src
, int lineno
, const char *cp
,
301 struct attr_state
*e
)
303 const char *ep
, *equals
;
306 ep
= cp
+ strcspn(cp
, blank
);
307 equals
= strchr(cp
, '=');
308 if (equals
&& ep
< equals
)
315 if (*cp
== '-' || *cp
== '!') {
319 if (!attr_name_valid(cp
, len
)) {
320 report_invalid_attr(cp
, len
, src
, lineno
);
325 * As this function is always called twice, once with
326 * e == NULL in the first pass and then e != NULL in
327 * the second pass, no need for attr_name_valid()
330 if (*cp
== '-' || *cp
== '!') {
331 e
->setto
= (*cp
== '-') ? ATTR__FALSE
: ATTR__UNSET
;
336 e
->setto
= ATTR__TRUE
;
338 e
->setto
= xmemdupz(equals
+ 1, ep
- equals
- 1);
340 e
->attr
= git_attr_internal(cp
, len
);
342 return ep
+ strspn(ep
, blank
);
345 static struct match_attr
*parse_attr_line(const char *line
, const char *src
,
346 int lineno
, int macro_ok
)
350 const char *cp
, *name
, *states
;
351 struct match_attr
*res
= NULL
;
353 struct strbuf pattern
= STRBUF_INIT
;
355 cp
= line
+ strspn(line
, blank
);
356 if (!*cp
|| *cp
== '#')
360 if (*cp
== '"' && !unquote_c_style(&pattern
, name
, &states
)) {
362 namelen
= pattern
.len
;
364 namelen
= strcspn(name
, blank
);
365 states
= name
+ namelen
;
368 if (strlen(ATTRIBUTE_MACRO_PREFIX
) < namelen
&&
369 starts_with(name
, ATTRIBUTE_MACRO_PREFIX
)) {
371 fprintf_ln(stderr
, _("%s not allowed: %s:%d"),
376 name
+= strlen(ATTRIBUTE_MACRO_PREFIX
);
377 name
+= strspn(name
, blank
);
378 namelen
= strcspn(name
, blank
);
379 if (!attr_name_valid(name
, namelen
)) {
380 report_invalid_attr(name
, namelen
, src
, lineno
);
387 states
+= strspn(states
, blank
);
389 /* First pass to count the attr_states */
390 for (cp
= states
, num_attr
= 0; *cp
; num_attr
++) {
391 cp
= parse_attr(src
, lineno
, cp
, NULL
);
398 sizeof(struct attr_state
) * num_attr
+
399 (is_macro
? 0 : namelen
+ 1));
401 res
->u
.attr
= git_attr_internal(name
, namelen
);
403 char *p
= (char *)&(res
->state
[num_attr
]);
404 memcpy(p
, name
, namelen
);
405 res
->u
.pat
.pattern
= p
;
406 parse_exclude_pattern(&res
->u
.pat
.pattern
,
407 &res
->u
.pat
.patternlen
,
409 &res
->u
.pat
.nowildcardlen
);
410 if (res
->u
.pat
.flags
& EXC_FLAG_NEGATIVE
) {
411 warning(_("Negative patterns are ignored in git attributes\n"
412 "Use '\\!' for literal leading exclamation."));
416 res
->is_macro
= is_macro
;
417 res
->num_attr
= num_attr
;
419 /* Second pass to fill the attr_states */
420 for (cp
= states
, i
= 0; *cp
; i
++) {
421 cp
= parse_attr(src
, lineno
, cp
, &(res
->state
[i
]));
424 strbuf_release(&pattern
);
428 strbuf_release(&pattern
);
434 * Like info/exclude and .gitignore, the attribute information can
435 * come from many places.
437 * (1) .gitattributes file of the same directory;
438 * (2) .gitattributes file of the parent directory if (1) does not have
439 * any match; this goes recursively upwards, just like .gitignore.
440 * (3) $GIT_DIR/info/attributes, which overrides both of the above.
442 * In the same file, later entries override the earlier match, so in the
443 * global list, we would have entries from info/attributes the earliest
444 * (reading the file from top to bottom), .gitattributes of the root
445 * directory (again, reading the file from top to bottom) down to the
446 * current directory, and then scan the list backwards to find the first match.
447 * This is exactly the same as what is_excluded() does in dir.c to deal with
448 * .gitignore file and info/excludes file as a fallback.
452 struct attr_stack
*prev
;
455 unsigned num_matches
;
457 struct match_attr
**attrs
;
460 static void attr_stack_free(struct attr_stack
*e
)
464 for (i
= 0; i
< e
->num_matches
; i
++) {
465 struct match_attr
*a
= e
->attrs
[i
];
467 for (j
= 0; j
< a
->num_attr
; j
++) {
468 const char *setto
= a
->state
[j
].setto
;
469 if (setto
== ATTR__TRUE
||
470 setto
== ATTR__FALSE
||
471 setto
== ATTR__UNSET
||
472 setto
== ATTR__UNKNOWN
)
475 free((char *) setto
);
483 static void drop_attr_stack(struct attr_stack
**stack
)
486 struct attr_stack
*elem
= *stack
;
488 attr_stack_free(elem
);
492 /* List of all attr_check structs; access should be surrounded by mutex */
493 static struct check_vector
{
496 struct attr_check
**checks
;
497 pthread_mutex_t mutex
;
500 static inline void vector_lock(void)
502 pthread_mutex_lock(&check_vector
.mutex
);
505 static inline void vector_unlock(void)
507 pthread_mutex_unlock(&check_vector
.mutex
);
510 static void check_vector_add(struct attr_check
*c
)
514 ALLOC_GROW(check_vector
.checks
,
517 check_vector
.checks
[check_vector
.nr
++] = c
;
522 static void check_vector_remove(struct attr_check
*check
)
529 for (i
= 0; i
< check_vector
.nr
; i
++)
530 if (check_vector
.checks
[i
] == check
)
533 if (i
>= check_vector
.nr
)
534 BUG("no entry found");
536 /* shift entries over */
537 for (; i
< check_vector
.nr
- 1; i
++)
538 check_vector
.checks
[i
] = check_vector
.checks
[i
+ 1];
545 /* Iterate through all attr_check instances and drop their stacks */
546 static void drop_all_attr_stacks(void)
552 for (i
= 0; i
< check_vector
.nr
; i
++) {
553 drop_attr_stack(&check_vector
.checks
[i
]->stack
);
559 struct attr_check
*attr_check_alloc(void)
561 struct attr_check
*c
= xcalloc(1, sizeof(struct attr_check
));
563 /* save pointer to the check struct */
569 struct attr_check
*attr_check_initl(const char *one
, ...)
571 struct attr_check
*check
;
576 va_start(params
, one
);
577 for (cnt
= 1; (param
= va_arg(params
, const char *)) != NULL
; cnt
++)
581 check
= attr_check_alloc();
584 check
->items
= xcalloc(cnt
, sizeof(struct attr_check_item
));
586 check
->items
[0].attr
= git_attr(one
);
587 va_start(params
, one
);
588 for (cnt
= 1; cnt
< check
->nr
; cnt
++) {
589 const struct git_attr
*attr
;
590 param
= va_arg(params
, const char *);
592 BUG("counted %d != ended at %d",
594 attr
= git_attr(param
);
596 BUG("%s: not a valid attribute name", param
);
597 check
->items
[cnt
].attr
= attr
;
603 struct attr_check
*attr_check_dup(const struct attr_check
*check
)
605 struct attr_check
*ret
;
610 ret
= attr_check_alloc();
613 ret
->alloc
= check
->alloc
;
614 ALLOC_ARRAY(ret
->items
, ret
->nr
);
615 COPY_ARRAY(ret
->items
, check
->items
, ret
->nr
);
620 struct attr_check_item
*attr_check_append(struct attr_check
*check
,
621 const struct git_attr
*attr
)
623 struct attr_check_item
*item
;
625 ALLOC_GROW(check
->items
, check
->nr
+ 1, check
->alloc
);
626 item
= &check
->items
[check
->nr
++];
631 void attr_check_reset(struct attr_check
*check
)
636 void attr_check_clear(struct attr_check
*check
)
638 FREE_AND_NULL(check
->items
);
642 FREE_AND_NULL(check
->all_attrs
);
643 check
->all_attrs_nr
= 0;
645 drop_attr_stack(&check
->stack
);
648 void attr_check_free(struct attr_check
*check
)
651 /* Remove check from the check vector */
652 check_vector_remove(check
);
654 attr_check_clear(check
);
659 static const char *builtin_attr
[] = {
660 "[attr]binary -diff -merge -text",
664 static void handle_attr_line(struct attr_stack
*res
,
670 struct match_attr
*a
;
672 a
= parse_attr_line(line
, src
, lineno
, macro_ok
);
675 ALLOC_GROW(res
->attrs
, res
->num_matches
+ 1, res
->alloc
);
676 res
->attrs
[res
->num_matches
++] = a
;
679 static struct attr_stack
*read_attr_from_array(const char **list
)
681 struct attr_stack
*res
;
685 res
= xcalloc(1, sizeof(*res
));
686 while ((line
= *(list
++)) != NULL
)
687 handle_attr_line(res
, line
, "[builtin]", ++lineno
, 1);
692 * Callers into the attribute system assume there is a single, system-wide
693 * global state where attributes are read from and when the state is flipped by
694 * calling git_attr_set_direction(), the stack frames that have been
695 * constructed need to be discarded so so that subsequent calls into the
696 * attribute system will lazily read from the right place. Since changing
697 * direction causes a global paradigm shift, it should not ever be called while
698 * another thread could potentially be calling into the attribute system.
700 static enum git_attr_direction direction
;
702 void git_attr_set_direction(enum git_attr_direction new_direction
)
704 if (is_bare_repository() && new_direction
!= GIT_ATTR_INDEX
)
705 BUG("non-INDEX attr direction in a bare repo");
707 if (new_direction
!= direction
)
708 drop_all_attr_stacks();
710 direction
= new_direction
;
713 static struct attr_stack
*read_attr_from_file(const char *path
, int macro_ok
)
715 FILE *fp
= fopen_or_warn(path
, "r");
716 struct attr_stack
*res
;
722 res
= xcalloc(1, sizeof(*res
));
723 while (fgets(buf
, sizeof(buf
), fp
)) {
726 skip_utf8_bom(&bufp
, strlen(bufp
));
727 handle_attr_line(res
, bufp
, path
, ++lineno
, macro_ok
);
733 static struct attr_stack
*read_attr_from_index(const struct index_state
*istate
,
737 struct attr_stack
*res
;
744 buf
= read_blob_data_from_index(istate
, path
, NULL
);
748 res
= xcalloc(1, sizeof(*res
));
749 for (sp
= buf
; *sp
; ) {
753 ep
= strchrnul(sp
, '\n');
754 more
= (*ep
== '\n');
756 handle_attr_line(res
, sp
, path
, ++lineno
, macro_ok
);
763 static struct attr_stack
*read_attr(const struct index_state
*istate
,
764 const char *path
, int macro_ok
)
766 struct attr_stack
*res
= NULL
;
768 if (direction
== GIT_ATTR_INDEX
) {
769 res
= read_attr_from_index(istate
, path
, macro_ok
);
770 } else if (!is_bare_repository()) {
771 if (direction
== GIT_ATTR_CHECKOUT
) {
772 res
= read_attr_from_index(istate
, path
, macro_ok
);
774 res
= read_attr_from_file(path
, macro_ok
);
775 } else if (direction
== GIT_ATTR_CHECKIN
) {
776 res
= read_attr_from_file(path
, macro_ok
);
779 * There is no checked out .gitattributes file
780 * there, but we might have it in the index.
781 * We allow operation in a sparsely checked out
782 * work tree, so read from it.
784 res
= read_attr_from_index(istate
, path
, macro_ok
);
789 res
= xcalloc(1, sizeof(*res
));
794 static void debug_info(const char *what
, struct attr_stack
*elem
)
796 fprintf(stderr
, "%s: %s\n", what
, elem
->origin
? elem
->origin
: "()");
798 static void debug_set(const char *what
, const char *match
, struct git_attr
*attr
, const void *v
)
800 const char *value
= v
;
802 if (ATTR_TRUE(value
))
804 else if (ATTR_FALSE(value
))
806 else if (ATTR_UNSET(value
))
807 value
= "unspecified";
809 fprintf(stderr
, "%s: %s => %s (%s)\n",
810 what
, attr
->name
, (char *) value
, match
);
812 #define debug_push(a) debug_info("push", (a))
813 #define debug_pop(a) debug_info("pop", (a))
815 #define debug_push(a) do { ; } while (0)
816 #define debug_pop(a) do { ; } while (0)
817 #define debug_set(a,b,c,d) do { ; } while (0)
818 #endif /* DEBUG_ATTR */
820 static const char *git_etc_gitattributes(void)
822 static const char *system_wide
;
824 system_wide
= system_path(ETC_GITATTRIBUTES
);
828 static const char *get_home_gitattributes(void)
830 if (!git_attributes_file
)
831 git_attributes_file
= xdg_config_home("attributes");
833 return git_attributes_file
;
836 static int git_attr_system(void)
838 return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
841 static GIT_PATH_FUNC(git_path_info_attributes
, INFOATTRIBUTES_FILE
)
843 static void push_stack(struct attr_stack
**attr_stack_p
,
844 struct attr_stack
*elem
, char *origin
, size_t originlen
)
847 elem
->origin
= origin
;
849 elem
->originlen
= originlen
;
850 elem
->prev
= *attr_stack_p
;
851 *attr_stack_p
= elem
;
855 static void bootstrap_attr_stack(const struct index_state
*istate
,
856 struct attr_stack
**stack
)
858 struct attr_stack
*e
;
864 e
= read_attr_from_array(builtin_attr
);
865 push_stack(stack
, e
, NULL
, 0);
867 /* system-wide frame */
868 if (git_attr_system()) {
869 e
= read_attr_from_file(git_etc_gitattributes(), 1);
870 push_stack(stack
, e
, NULL
, 0);
874 if (get_home_gitattributes()) {
875 e
= read_attr_from_file(get_home_gitattributes(), 1);
876 push_stack(stack
, e
, NULL
, 0);
880 e
= read_attr(istate
, GITATTRIBUTES_FILE
, 1);
881 push_stack(stack
, e
, xstrdup(""), 0);
884 if (startup_info
->have_repository
)
885 e
= read_attr_from_file(git_path_info_attributes(), 1);
889 e
= xcalloc(1, sizeof(struct attr_stack
));
890 push_stack(stack
, e
, NULL
, 0);
893 static void prepare_attr_stack(const struct index_state
*istate
,
894 const char *path
, int dirlen
,
895 struct attr_stack
**stack
)
897 struct attr_stack
*info
;
898 struct strbuf pathbuf
= STRBUF_INIT
;
901 * At the bottom of the attribute stack is the built-in
902 * set of attribute definitions, followed by the contents
903 * of $(prefix)/etc/gitattributes and a file specified by
904 * core.attributesfile. Then, contents from
905 * .gitattributes files from directories closer to the
906 * root to the ones in deeper directories are pushed
907 * to the stack. Finally, at the very top of the stack
908 * we always keep the contents of $GIT_DIR/info/attributes.
910 * When checking, we use entries from near the top of the
911 * stack, preferring $GIT_DIR/info/attributes, then
912 * .gitattributes in deeper directories to shallower ones,
913 * and finally use the built-in set as the default.
915 bootstrap_attr_stack(istate
, stack
);
918 * Pop the "info" one that is always at the top of the stack.
924 * Pop the ones from directories that are not the prefix of
925 * the path we are checking. Break out of the loop when we see
926 * the root one (whose origin is an empty string "") or the builtin
927 * one (whose origin is NULL) without popping it.
929 while ((*stack
)->origin
) {
930 int namelen
= (*stack
)->originlen
;
931 struct attr_stack
*elem
;
934 if (namelen
<= dirlen
&&
935 !strncmp(elem
->origin
, path
, namelen
) &&
936 (!namelen
|| path
[namelen
] == '/'))
941 attr_stack_free(elem
);
945 * bootstrap_attr_stack() should have added, and the
946 * above loop should have stopped before popping, the
947 * root element whose attr_stack->origin is set to an
950 assert((*stack
)->origin
);
952 strbuf_addstr(&pathbuf
, (*stack
)->origin
);
953 /* Build up to the directory 'path' is in */
954 while (pathbuf
.len
< dirlen
) {
955 size_t len
= pathbuf
.len
;
956 struct attr_stack
*next
;
959 /* Skip path-separator */
960 if (len
< dirlen
&& is_dir_sep(path
[len
]))
962 /* Find the end of the next component */
963 while (len
< dirlen
&& !is_dir_sep(path
[len
]))
967 strbuf_addch(&pathbuf
, '/');
968 strbuf_add(&pathbuf
, path
+ pathbuf
.len
, (len
- pathbuf
.len
));
969 strbuf_addf(&pathbuf
, "/%s", GITATTRIBUTES_FILE
);
971 next
= read_attr(istate
, pathbuf
.buf
, 0);
973 /* reset the pathbuf to not include "/.gitattributes" */
974 strbuf_setlen(&pathbuf
, len
);
976 origin
= xstrdup(pathbuf
.buf
);
977 push_stack(stack
, next
, origin
, len
);
981 * Finally push the "info" one at the top of the stack.
983 push_stack(stack
, info
, NULL
, 0);
985 strbuf_release(&pathbuf
);
988 static int path_matches(const char *pathname
, int pathlen
,
990 const struct pattern
*pat
,
991 const char *base
, int baselen
)
993 const char *pattern
= pat
->pattern
;
994 int prefix
= pat
->nowildcardlen
;
995 int isdir
= (pathlen
&& pathname
[pathlen
- 1] == '/');
997 if ((pat
->flags
& EXC_FLAG_MUSTBEDIR
) && !isdir
)
1000 if (pat
->flags
& EXC_FLAG_NODIR
) {
1001 return match_basename(pathname
+ basename_offset
,
1002 pathlen
- basename_offset
- isdir
,
1004 pat
->patternlen
, pat
->flags
);
1006 return match_pathname(pathname
, pathlen
- isdir
,
1008 pattern
, prefix
, pat
->patternlen
, pat
->flags
);
1011 static int macroexpand_one(struct all_attrs_item
*all_attrs
, int nr
, int rem
);
1013 static int fill_one(const char *what
, struct all_attrs_item
*all_attrs
,
1014 const struct match_attr
*a
, int rem
)
1018 for (i
= a
->num_attr
- 1; rem
> 0 && i
>= 0; i
--) {
1019 const struct git_attr
*attr
= a
->state
[i
].attr
;
1020 const char **n
= &(all_attrs
[attr
->attr_nr
].value
);
1021 const char *v
= a
->state
[i
].setto
;
1023 if (*n
== ATTR__UNKNOWN
) {
1025 a
->is_macro
? a
->u
.attr
->name
: a
->u
.pat
.pattern
,
1029 rem
= macroexpand_one(all_attrs
, attr
->attr_nr
, rem
);
1035 static int fill(const char *path
, int pathlen
, int basename_offset
,
1036 const struct attr_stack
*stack
,
1037 struct all_attrs_item
*all_attrs
, int rem
)
1039 for (; rem
> 0 && stack
; stack
= stack
->prev
) {
1041 const char *base
= stack
->origin
? stack
->origin
: "";
1043 for (i
= stack
->num_matches
- 1; 0 < rem
&& 0 <= i
; i
--) {
1044 const struct match_attr
*a
= stack
->attrs
[i
];
1047 if (path_matches(path
, pathlen
, basename_offset
,
1048 &a
->u
.pat
, base
, stack
->originlen
))
1049 rem
= fill_one("fill", all_attrs
, a
, rem
);
1056 static int macroexpand_one(struct all_attrs_item
*all_attrs
, int nr
, int rem
)
1058 const struct all_attrs_item
*item
= &all_attrs
[nr
];
1060 if (item
->macro
&& item
->value
== ATTR__TRUE
)
1061 return fill_one("expand", all_attrs
, item
->macro
, rem
);
1067 * Marks the attributes which are macros based on the attribute stack.
1068 * This prevents having to search through the attribute stack each time
1069 * a macro needs to be expanded during the fill stage.
1071 static void determine_macros(struct all_attrs_item
*all_attrs
,
1072 const struct attr_stack
*stack
)
1074 for (; stack
; stack
= stack
->prev
) {
1076 for (i
= stack
->num_matches
- 1; i
>= 0; i
--) {
1077 const struct match_attr
*ma
= stack
->attrs
[i
];
1079 int n
= ma
->u
.attr
->attr_nr
;
1080 if (!all_attrs
[n
].macro
) {
1081 all_attrs
[n
].macro
= ma
;
1089 * Collect attributes for path into the array pointed to by check->all_attrs.
1090 * If check->check_nr is non-zero, only attributes in check[] are collected.
1091 * Otherwise all attributes are collected.
1093 static void collect_some_attrs(const struct index_state
*istate
,
1095 struct attr_check
*check
)
1097 int pathlen
, rem
, dirlen
;
1098 const char *cp
, *last_slash
= NULL
;
1099 int basename_offset
;
1101 for (cp
= path
; *cp
; cp
++) {
1102 if (*cp
== '/' && cp
[1])
1105 pathlen
= cp
- path
;
1107 basename_offset
= last_slash
+ 1 - path
;
1108 dirlen
= last_slash
- path
;
1110 basename_offset
= 0;
1114 prepare_attr_stack(istate
, path
, dirlen
, &check
->stack
);
1115 all_attrs_init(&g_attr_hashmap
, check
);
1116 determine_macros(check
->all_attrs
, check
->stack
);
1118 rem
= check
->all_attrs_nr
;
1119 fill(path
, pathlen
, basename_offset
, check
->stack
, check
->all_attrs
, rem
);
1122 void git_check_attr(const struct index_state
*istate
,
1124 struct attr_check
*check
)
1128 collect_some_attrs(istate
, path
, check
);
1130 for (i
= 0; i
< check
->nr
; i
++) {
1131 size_t n
= check
->items
[i
].attr
->attr_nr
;
1132 const char *value
= check
->all_attrs
[n
].value
;
1133 if (value
== ATTR__UNKNOWN
)
1134 value
= ATTR__UNSET
;
1135 check
->items
[i
].value
= value
;
1139 void git_all_attrs(const struct index_state
*istate
,
1140 const char *path
, struct attr_check
*check
)
1144 attr_check_reset(check
);
1145 collect_some_attrs(istate
, path
, check
);
1147 for (i
= 0; i
< check
->all_attrs_nr
; i
++) {
1148 const char *name
= check
->all_attrs
[i
].attr
->name
;
1149 const char *value
= check
->all_attrs
[i
].value
;
1150 struct attr_check_item
*item
;
1151 if (value
== ATTR__UNSET
|| value
== ATTR__UNKNOWN
)
1153 item
= attr_check_append(check
, git_attr(name
));
1154 item
->value
= value
;
1158 void attr_start(void)
1160 pthread_mutex_init(&g_attr_hashmap
.mutex
, NULL
);
1161 pthread_mutex_init(&check_vector
.mutex
, NULL
);