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.
19 #include "object-store.h"
20 #include "thread-utils.h"
22 const char git_attr__true
[] = "(builtin)true";
23 const char git_attr__false
[] = "\0(builtin)false";
24 static const char git_attr__unknown
[] = "(builtin)unknown";
25 #define ATTR__TRUE git_attr__true
26 #define ATTR__FALSE git_attr__false
27 #define ATTR__UNSET NULL
28 #define ATTR__UNKNOWN git_attr__unknown
31 unsigned 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 *cmp_data UNUSED
,
65 const struct hashmap_entry
*eptr
,
66 const struct hashmap_entry
*entry_or_key
,
67 const void *keydata UNUSED
)
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 .map
= 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
, size_t 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
);
229 if (a
->attr_nr
!= hashmap_get_size(&g_attr_hashmap
.map
) - 1)
230 die(_("unable to add additional attribute"));
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";
281 /* Flags usable in read_attr() and parse_attr_line() family of functions. */
282 #define READ_ATTR_MACRO_OK (1<<0)
283 #define READ_ATTR_NOFOLLOW (1<<1)
286 * Parse a whitespace-delimited attribute state (i.e., "attr",
287 * "-attr", "!attr", or "attr=value") from the string starting at src.
288 * If e is not NULL, write the results to *e. Return a pointer to the
289 * remainder of the string (with leading whitespace removed), or NULL
290 * if there was an error.
292 static const char *parse_attr(const char *src
, int lineno
, const char *cp
,
293 struct attr_state
*e
)
295 const char *ep
, *equals
;
298 ep
= cp
+ strcspn(cp
, blank
);
299 equals
= strchr(cp
, '=');
300 if (equals
&& ep
< equals
)
307 if (*cp
== '-' || *cp
== '!') {
311 if (!attr_name_valid(cp
, len
)) {
312 report_invalid_attr(cp
, len
, src
, lineno
);
317 * As this function is always called twice, once with
318 * e == NULL in the first pass and then e != NULL in
319 * the second pass, no need for attr_name_valid()
322 if (*cp
== '-' || *cp
== '!') {
323 e
->setto
= (*cp
== '-') ? ATTR__FALSE
: ATTR__UNSET
;
328 e
->setto
= ATTR__TRUE
;
330 e
->setto
= xmemdupz(equals
+ 1, ep
- equals
- 1);
332 e
->attr
= git_attr_internal(cp
, len
);
334 return ep
+ strspn(ep
, blank
);
337 static struct match_attr
*parse_attr_line(const char *line
, const char *src
,
338 int lineno
, unsigned flags
)
340 size_t namelen
, num_attr
, i
;
341 const char *cp
, *name
, *states
;
342 struct match_attr
*res
= NULL
;
344 struct strbuf pattern
= STRBUF_INIT
;
346 cp
= line
+ strspn(line
, blank
);
347 if (!*cp
|| *cp
== '#')
351 if (strlen(line
) >= ATTR_MAX_LINE_LENGTH
) {
352 warning(_("ignoring overly long attributes line %d"), lineno
);
356 if (*cp
== '"' && !unquote_c_style(&pattern
, name
, &states
)) {
358 namelen
= pattern
.len
;
360 namelen
= strcspn(name
, blank
);
361 states
= name
+ namelen
;
364 if (strlen(ATTRIBUTE_MACRO_PREFIX
) < namelen
&&
365 starts_with(name
, ATTRIBUTE_MACRO_PREFIX
)) {
366 if (!(flags
& READ_ATTR_MACRO_OK
)) {
367 fprintf_ln(stderr
, _("%s not allowed: %s:%d"),
372 name
+= strlen(ATTRIBUTE_MACRO_PREFIX
);
373 name
+= strspn(name
, blank
);
374 namelen
= strcspn(name
, blank
);
375 if (!attr_name_valid(name
, namelen
)) {
376 report_invalid_attr(name
, namelen
, src
, lineno
);
383 states
+= strspn(states
, blank
);
385 /* First pass to count the attr_states */
386 for (cp
= states
, num_attr
= 0; *cp
; num_attr
++) {
387 cp
= parse_attr(src
, lineno
, cp
, NULL
);
392 res
= xcalloc(1, st_add3(sizeof(*res
),
393 st_mult(sizeof(struct attr_state
), num_attr
),
394 is_macro
? 0 : namelen
+ 1));
396 res
->u
.attr
= git_attr_internal(name
, namelen
);
398 char *p
= (char *)&(res
->state
[num_attr
]);
399 memcpy(p
, name
, namelen
);
400 res
->u
.pat
.pattern
= p
;
401 parse_path_pattern(&res
->u
.pat
.pattern
,
402 &res
->u
.pat
.patternlen
,
404 &res
->u
.pat
.nowildcardlen
);
405 if (res
->u
.pat
.flags
& PATTERN_FLAG_NEGATIVE
) {
406 warning(_("Negative patterns are ignored in git attributes\n"
407 "Use '\\!' for literal leading exclamation."));
411 res
->is_macro
= is_macro
;
412 res
->num_attr
= num_attr
;
414 /* Second pass to fill the attr_states */
415 for (cp
= states
, i
= 0; *cp
; i
++) {
416 cp
= parse_attr(src
, lineno
, cp
, &(res
->state
[i
]));
419 strbuf_release(&pattern
);
423 strbuf_release(&pattern
);
429 * Like info/exclude and .gitignore, the attribute information can
430 * come from many places.
432 * (1) .gitattributes file of the same directory;
433 * (2) .gitattributes file of the parent directory if (1) does not have
434 * any match; this goes recursively upwards, just like .gitignore.
435 * (3) $GIT_DIR/info/attributes, which overrides both of the above.
437 * In the same file, later entries override the earlier match, so in the
438 * global list, we would have entries from info/attributes the earliest
439 * (reading the file from top to bottom), .gitattributes of the root
440 * directory (again, reading the file from top to bottom) down to the
441 * current directory, and then scan the list backwards to find the first match.
442 * This is exactly the same as what is_excluded() does in dir.c to deal with
443 * .gitignore file and info/excludes file as a fallback.
447 struct attr_stack
*prev
;
450 unsigned num_matches
;
452 struct match_attr
**attrs
;
455 static void attr_stack_free(struct attr_stack
*e
)
459 for (i
= 0; i
< e
->num_matches
; i
++) {
460 struct match_attr
*a
= e
->attrs
[i
];
463 for (j
= 0; j
< a
->num_attr
; j
++) {
464 const char *setto
= a
->state
[j
].setto
;
465 if (setto
== ATTR__TRUE
||
466 setto
== ATTR__FALSE
||
467 setto
== ATTR__UNSET
||
468 setto
== ATTR__UNKNOWN
)
471 free((char *) setto
);
479 static void drop_attr_stack(struct attr_stack
**stack
)
482 struct attr_stack
*elem
= *stack
;
484 attr_stack_free(elem
);
488 /* List of all attr_check structs; access should be surrounded by mutex */
489 static struct check_vector
{
492 struct attr_check
**checks
;
493 pthread_mutex_t mutex
;
496 static inline void vector_lock(void)
498 pthread_mutex_lock(&check_vector
.mutex
);
501 static inline void vector_unlock(void)
503 pthread_mutex_unlock(&check_vector
.mutex
);
506 static void check_vector_add(struct attr_check
*c
)
510 ALLOC_GROW(check_vector
.checks
,
513 check_vector
.checks
[check_vector
.nr
++] = c
;
518 static void check_vector_remove(struct attr_check
*check
)
525 for (i
= 0; i
< check_vector
.nr
; i
++)
526 if (check_vector
.checks
[i
] == check
)
529 if (i
>= check_vector
.nr
)
530 BUG("no entry found");
532 /* shift entries over */
533 for (; i
< check_vector
.nr
- 1; i
++)
534 check_vector
.checks
[i
] = check_vector
.checks
[i
+ 1];
541 /* Iterate through all attr_check instances and drop their stacks */
542 static void drop_all_attr_stacks(void)
548 for (i
= 0; i
< check_vector
.nr
; i
++) {
549 drop_attr_stack(&check_vector
.checks
[i
]->stack
);
555 struct attr_check
*attr_check_alloc(void)
557 struct attr_check
*c
= xcalloc(1, sizeof(struct attr_check
));
559 /* save pointer to the check struct */
565 struct attr_check
*attr_check_initl(const char *one
, ...)
567 struct attr_check
*check
;
572 va_start(params
, one
);
573 for (cnt
= 1; (param
= va_arg(params
, const char *)) != NULL
; cnt
++)
577 check
= attr_check_alloc();
580 CALLOC_ARRAY(check
->items
, cnt
);
582 check
->items
[0].attr
= git_attr(one
);
583 va_start(params
, one
);
584 for (cnt
= 1; cnt
< check
->nr
; cnt
++) {
585 const struct git_attr
*attr
;
586 param
= va_arg(params
, const char *);
588 BUG("counted %d != ended at %d",
590 attr
= git_attr(param
);
592 BUG("%s: not a valid attribute name", param
);
593 check
->items
[cnt
].attr
= attr
;
599 struct attr_check
*attr_check_dup(const struct attr_check
*check
)
601 struct attr_check
*ret
;
606 ret
= attr_check_alloc();
609 ret
->alloc
= check
->alloc
;
610 DUP_ARRAY(ret
->items
, check
->items
, ret
->nr
);
615 struct attr_check_item
*attr_check_append(struct attr_check
*check
,
616 const struct git_attr
*attr
)
618 struct attr_check_item
*item
;
620 ALLOC_GROW(check
->items
, check
->nr
+ 1, check
->alloc
);
621 item
= &check
->items
[check
->nr
++];
626 void attr_check_reset(struct attr_check
*check
)
631 void attr_check_clear(struct attr_check
*check
)
633 FREE_AND_NULL(check
->items
);
637 FREE_AND_NULL(check
->all_attrs
);
638 check
->all_attrs_nr
= 0;
640 drop_attr_stack(&check
->stack
);
643 void attr_check_free(struct attr_check
*check
)
646 /* Remove check from the check vector */
647 check_vector_remove(check
);
649 attr_check_clear(check
);
654 static const char *builtin_attr
[] = {
655 "[attr]binary -diff -merge -text",
659 static void handle_attr_line(struct attr_stack
*res
,
665 struct match_attr
*a
;
667 a
= parse_attr_line(line
, src
, lineno
, flags
);
670 ALLOC_GROW_BY(res
->attrs
, res
->num_matches
, 1, res
->alloc
);
671 res
->attrs
[res
->num_matches
- 1] = a
;
674 static struct attr_stack
*read_attr_from_array(const char **list
)
676 struct attr_stack
*res
;
680 CALLOC_ARRAY(res
, 1);
681 while ((line
= *(list
++)) != NULL
)
682 handle_attr_line(res
, line
, "[builtin]", ++lineno
,
688 * Callers into the attribute system assume there is a single, system-wide
689 * global state where attributes are read from and when the state is flipped by
690 * calling git_attr_set_direction(), the stack frames that have been
691 * constructed need to be discarded so that subsequent calls into the
692 * attribute system will lazily read from the right place. Since changing
693 * direction causes a global paradigm shift, it should not ever be called while
694 * another thread could potentially be calling into the attribute system.
696 static enum git_attr_direction direction
;
698 void git_attr_set_direction(enum git_attr_direction new_direction
)
700 if (is_bare_repository() && new_direction
!= GIT_ATTR_INDEX
)
701 BUG("non-INDEX attr direction in a bare repo");
703 if (new_direction
!= direction
)
704 drop_all_attr_stacks();
706 direction
= new_direction
;
709 static struct attr_stack
*read_attr_from_file(const char *path
, unsigned flags
)
711 struct strbuf buf
= STRBUF_INIT
;
714 struct attr_stack
*res
;
718 if (flags
& READ_ATTR_NOFOLLOW
)
719 fd
= open_nofollow(path
, O_RDONLY
);
721 fd
= open(path
, O_RDONLY
);
724 warn_on_fopen_errors(path
);
727 fp
= xfdopen(fd
, "r");
728 if (fstat(fd
, &st
)) {
729 warning_errno(_("cannot fstat gitattributes file '%s'"), path
);
733 if (st
.st_size
>= ATTR_MAX_FILE_SIZE
) {
734 warning(_("ignoring overly large gitattributes file '%s'"), path
);
739 CALLOC_ARRAY(res
, 1);
740 while (strbuf_getline(&buf
, fp
) != EOF
) {
741 if (!lineno
&& starts_with(buf
.buf
, utf8_bom
))
742 strbuf_remove(&buf
, 0, strlen(utf8_bom
));
743 handle_attr_line(res
, buf
.buf
, path
, ++lineno
, flags
);
747 strbuf_release(&buf
);
751 static struct attr_stack
*read_attr_from_buf(char *buf
, const char *path
,
754 struct attr_stack
*res
;
761 CALLOC_ARRAY(res
, 1);
762 for (sp
= buf
; *sp
;) {
766 ep
= strchrnul(sp
, '\n');
767 more
= (*ep
== '\n');
769 handle_attr_line(res
, sp
, path
, ++lineno
, flags
);
777 static struct attr_stack
*read_attr_from_blob(struct index_state
*istate
,
778 const struct object_id
*tree_oid
,
779 const char *path
, unsigned flags
)
781 struct object_id oid
;
783 enum object_type type
;
790 if (get_tree_entry(istate
->repo
, tree_oid
, path
, &oid
, &mode
))
793 buf
= repo_read_object_file(istate
->repo
, &oid
, &type
, &sz
);
794 if (!buf
|| type
!= OBJ_BLOB
) {
799 return read_attr_from_buf(buf
, path
, flags
);
802 static struct attr_stack
*read_attr_from_index(struct index_state
*istate
,
803 const char *path
, unsigned flags
)
812 * The .gitattributes file only applies to files within its
813 * parent directory. In the case of cone-mode sparse-checkout,
814 * the .gitattributes file is sparse if and only if all paths
815 * within that directory are also sparse. Thus, don't load the
816 * .gitattributes file since it will not matter.
818 * In the case of a sparse index, it is critical that we don't go
819 * looking for a .gitattributes file, as doing so would cause the
822 if (!path_in_cone_mode_sparse_checkout(path
, istate
))
825 buf
= read_blob_data_from_index(istate
, path
, &size
);
828 if (size
>= ATTR_MAX_FILE_SIZE
) {
829 warning(_("ignoring overly large gitattributes blob '%s'"), path
);
833 return read_attr_from_buf(buf
, path
, flags
);
836 static struct attr_stack
*read_attr(struct index_state
*istate
,
837 const struct object_id
*tree_oid
,
838 const char *path
, unsigned flags
)
840 struct attr_stack
*res
= NULL
;
842 if (direction
== GIT_ATTR_INDEX
) {
843 res
= read_attr_from_index(istate
, path
, flags
);
844 } else if (tree_oid
) {
845 res
= read_attr_from_blob(istate
, tree_oid
, path
, flags
);
846 } else if (!is_bare_repository()) {
847 if (direction
== GIT_ATTR_CHECKOUT
) {
848 res
= read_attr_from_index(istate
, path
, flags
);
850 res
= read_attr_from_file(path
, flags
);
851 } else if (direction
== GIT_ATTR_CHECKIN
) {
852 res
= read_attr_from_file(path
, flags
);
855 * There is no checked out .gitattributes file
856 * there, but we might have it in the index.
857 * We allow operation in a sparsely checked out
858 * work tree, so read from it.
860 res
= read_attr_from_index(istate
, path
, flags
);
865 CALLOC_ARRAY(res
, 1);
869 static const char *git_etc_gitattributes(void)
871 static const char *system_wide
;
873 system_wide
= system_path(ETC_GITATTRIBUTES
);
877 static const char *get_home_gitattributes(void)
879 if (!git_attributes_file
)
880 git_attributes_file
= xdg_config_home("attributes");
882 return git_attributes_file
;
885 static int git_attr_system(void)
887 return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
890 static GIT_PATH_FUNC(git_path_info_attributes
, INFOATTRIBUTES_FILE
)
892 static void push_stack(struct attr_stack
**attr_stack_p
,
893 struct attr_stack
*elem
, char *origin
, size_t originlen
)
896 elem
->origin
= origin
;
898 elem
->originlen
= originlen
;
899 elem
->prev
= *attr_stack_p
;
900 *attr_stack_p
= elem
;
904 static void bootstrap_attr_stack(struct index_state
*istate
,
905 const struct object_id
*tree_oid
,
906 struct attr_stack
**stack
)
908 struct attr_stack
*e
;
909 unsigned flags
= READ_ATTR_MACRO_OK
;
915 e
= read_attr_from_array(builtin_attr
);
916 push_stack(stack
, e
, NULL
, 0);
918 /* system-wide frame */
919 if (git_attr_system()) {
920 e
= read_attr_from_file(git_etc_gitattributes(), flags
);
921 push_stack(stack
, e
, NULL
, 0);
925 if (get_home_gitattributes()) {
926 e
= read_attr_from_file(get_home_gitattributes(), flags
);
927 push_stack(stack
, e
, NULL
, 0);
931 e
= read_attr(istate
, tree_oid
, GITATTRIBUTES_FILE
, flags
| READ_ATTR_NOFOLLOW
);
932 push_stack(stack
, e
, xstrdup(""), 0);
935 if (startup_info
->have_repository
)
936 e
= read_attr_from_file(git_path_info_attributes(), flags
);
941 push_stack(stack
, e
, NULL
, 0);
944 static void prepare_attr_stack(struct index_state
*istate
,
945 const struct object_id
*tree_oid
,
946 const char *path
, int dirlen
,
947 struct attr_stack
**stack
)
949 struct attr_stack
*info
;
950 struct strbuf pathbuf
= STRBUF_INIT
;
953 * At the bottom of the attribute stack is the built-in
954 * set of attribute definitions, followed by the contents
955 * of $(prefix)/etc/gitattributes and a file specified by
956 * core.attributesfile. Then, contents from
957 * .gitattributes files from directories closer to the
958 * root to the ones in deeper directories are pushed
959 * to the stack. Finally, at the very top of the stack
960 * we always keep the contents of $GIT_DIR/info/attributes.
962 * When checking, we use entries from near the top of the
963 * stack, preferring $GIT_DIR/info/attributes, then
964 * .gitattributes in deeper directories to shallower ones,
965 * and finally use the built-in set as the default.
967 bootstrap_attr_stack(istate
, tree_oid
, stack
);
970 * Pop the "info" one that is always at the top of the stack.
976 * Pop the ones from directories that are not the prefix of
977 * the path we are checking. Break out of the loop when we see
978 * the root one (whose origin is an empty string "") or the builtin
979 * one (whose origin is NULL) without popping it.
981 while ((*stack
)->origin
) {
982 int namelen
= (*stack
)->originlen
;
983 struct attr_stack
*elem
;
986 if (namelen
<= dirlen
&&
987 !strncmp(elem
->origin
, path
, namelen
) &&
988 (!namelen
|| path
[namelen
] == '/'))
992 attr_stack_free(elem
);
996 * bootstrap_attr_stack() should have added, and the
997 * above loop should have stopped before popping, the
998 * root element whose attr_stack->origin is set to an
1001 assert((*stack
)->origin
);
1003 strbuf_addstr(&pathbuf
, (*stack
)->origin
);
1004 /* Build up to the directory 'path' is in */
1005 while (pathbuf
.len
< dirlen
) {
1006 size_t len
= pathbuf
.len
;
1007 struct attr_stack
*next
;
1010 /* Skip path-separator */
1011 if (len
< dirlen
&& is_dir_sep(path
[len
]))
1013 /* Find the end of the next component */
1014 while (len
< dirlen
&& !is_dir_sep(path
[len
]))
1017 if (pathbuf
.len
> 0)
1018 strbuf_addch(&pathbuf
, '/');
1019 strbuf_add(&pathbuf
, path
+ pathbuf
.len
, (len
- pathbuf
.len
));
1020 strbuf_addf(&pathbuf
, "/%s", GITATTRIBUTES_FILE
);
1022 next
= read_attr(istate
, tree_oid
, pathbuf
.buf
, READ_ATTR_NOFOLLOW
);
1024 /* reset the pathbuf to not include "/.gitattributes" */
1025 strbuf_setlen(&pathbuf
, len
);
1027 origin
= xstrdup(pathbuf
.buf
);
1028 push_stack(stack
, next
, origin
, len
);
1032 * Finally push the "info" one at the top of the stack.
1034 push_stack(stack
, info
, NULL
, 0);
1036 strbuf_release(&pathbuf
);
1039 static int path_matches(const char *pathname
, int pathlen
,
1040 int basename_offset
,
1041 const struct pattern
*pat
,
1042 const char *base
, int baselen
)
1044 const char *pattern
= pat
->pattern
;
1045 int prefix
= pat
->nowildcardlen
;
1046 int isdir
= (pathlen
&& pathname
[pathlen
- 1] == '/');
1048 if ((pat
->flags
& PATTERN_FLAG_MUSTBEDIR
) && !isdir
)
1051 if (pat
->flags
& PATTERN_FLAG_NODIR
) {
1052 return match_basename(pathname
+ basename_offset
,
1053 pathlen
- basename_offset
- isdir
,
1055 pat
->patternlen
, pat
->flags
);
1057 return match_pathname(pathname
, pathlen
- isdir
,
1059 pattern
, prefix
, pat
->patternlen
);
1062 static int macroexpand_one(struct all_attrs_item
*all_attrs
, int nr
, int rem
);
1064 static int fill_one(struct all_attrs_item
*all_attrs
,
1065 const struct match_attr
*a
, int rem
)
1069 for (i
= a
->num_attr
; rem
> 0 && i
> 0; i
--) {
1070 const struct git_attr
*attr
= a
->state
[i
- 1].attr
;
1071 const char **n
= &(all_attrs
[attr
->attr_nr
].value
);
1072 const char *v
= a
->state
[i
- 1].setto
;
1074 if (*n
== ATTR__UNKNOWN
) {
1077 rem
= macroexpand_one(all_attrs
, attr
->attr_nr
, rem
);
1083 static int fill(const char *path
, int pathlen
, int basename_offset
,
1084 const struct attr_stack
*stack
,
1085 struct all_attrs_item
*all_attrs
, int rem
)
1087 for (; rem
> 0 && stack
; stack
= stack
->prev
) {
1089 const char *base
= stack
->origin
? stack
->origin
: "";
1091 for (i
= stack
->num_matches
; 0 < rem
&& 0 < i
; i
--) {
1092 const struct match_attr
*a
= stack
->attrs
[i
- 1];
1095 if (path_matches(path
, pathlen
, basename_offset
,
1096 &a
->u
.pat
, base
, stack
->originlen
))
1097 rem
= fill_one(all_attrs
, a
, rem
);
1104 static int macroexpand_one(struct all_attrs_item
*all_attrs
, int nr
, int rem
)
1106 const struct all_attrs_item
*item
= &all_attrs
[nr
];
1108 if (item
->macro
&& item
->value
== ATTR__TRUE
)
1109 return fill_one(all_attrs
, item
->macro
, rem
);
1115 * Marks the attributes which are macros based on the attribute stack.
1116 * This prevents having to search through the attribute stack each time
1117 * a macro needs to be expanded during the fill stage.
1119 static void determine_macros(struct all_attrs_item
*all_attrs
,
1120 const struct attr_stack
*stack
)
1122 for (; stack
; stack
= stack
->prev
) {
1124 for (i
= stack
->num_matches
; i
> 0; i
--) {
1125 const struct match_attr
*ma
= stack
->attrs
[i
- 1];
1127 unsigned int n
= ma
->u
.attr
->attr_nr
;
1128 if (!all_attrs
[n
].macro
) {
1129 all_attrs
[n
].macro
= ma
;
1137 * Collect attributes for path into the array pointed to by check->all_attrs.
1138 * If check->check_nr is non-zero, only attributes in check[] are collected.
1139 * Otherwise all attributes are collected.
1141 static void collect_some_attrs(struct index_state
*istate
,
1142 const struct object_id
*tree_oid
,
1143 const char *path
, struct attr_check
*check
)
1145 int pathlen
, rem
, dirlen
;
1146 const char *cp
, *last_slash
= NULL
;
1147 int basename_offset
;
1149 for (cp
= path
; *cp
; cp
++) {
1150 if (*cp
== '/' && cp
[1])
1153 pathlen
= cp
- path
;
1155 basename_offset
= last_slash
+ 1 - path
;
1156 dirlen
= last_slash
- path
;
1158 basename_offset
= 0;
1162 prepare_attr_stack(istate
, tree_oid
, path
, dirlen
, &check
->stack
);
1163 all_attrs_init(&g_attr_hashmap
, check
);
1164 determine_macros(check
->all_attrs
, check
->stack
);
1166 rem
= check
->all_attrs_nr
;
1167 fill(path
, pathlen
, basename_offset
, check
->stack
, check
->all_attrs
, rem
);
1170 void git_check_attr(struct index_state
*istate
,
1171 const struct object_id
*tree_oid
, const char *path
,
1172 struct attr_check
*check
)
1176 collect_some_attrs(istate
, tree_oid
, path
, check
);
1178 for (i
= 0; i
< check
->nr
; i
++) {
1179 unsigned int n
= check
->items
[i
].attr
->attr_nr
;
1180 const char *value
= check
->all_attrs
[n
].value
;
1181 if (value
== ATTR__UNKNOWN
)
1182 value
= ATTR__UNSET
;
1183 check
->items
[i
].value
= value
;
1187 void git_all_attrs(struct index_state
*istate
, const struct object_id
*tree_oid
,
1188 const char *path
, struct attr_check
*check
)
1192 attr_check_reset(check
);
1193 collect_some_attrs(istate
, tree_oid
, path
, check
);
1195 for (i
= 0; i
< check
->all_attrs_nr
; i
++) {
1196 const char *name
= check
->all_attrs
[i
].attr
->name
;
1197 const char *value
= check
->all_attrs
[i
].value
;
1198 struct attr_check_item
*item
;
1199 if (value
== ATTR__UNSET
|| value
== ATTR__UNKNOWN
)
1201 item
= attr_check_append(check
, git_attr(name
));
1202 item
->value
= value
;
1206 void attr_start(void)
1208 pthread_mutex_init(&g_attr_hashmap
.mutex
, NULL
);
1209 pthread_mutex_init(&check_vector
.mutex
, NULL
);