1 files changed, 31 insertions, 21 deletions

diff --git a/attr.c b/attr.c
index 067fb9e0c0..98e4953f6e 100644
--- a/attr.c
+++ b/attr.c
@@ -708,10 +708,8 @@ static struct attr_stack *read_attr_from_array(const char **list)
  * another thread could potentially be calling into the attribute system.
  */
 static enum git_attr_direction direction;
-static struct index_state *use_index;
 
-void git_attr_set_direction(enum git_attr_direction new_direction,
-			    struct index_state *istate)
+void git_attr_set_direction(enum git_attr_direction new_direction)
 {
 	if (is_bare_repository() && new_direction != GIT_ATTR_INDEX)
 		BUG("non-INDEX attr direction in a bare repo");
@@ -720,7 +718,6 @@ void git_attr_set_direction(enum git_attr_direction new_direction,
 		drop_all_attr_stacks();
 
 	direction = new_direction;
-	use_index = istate;
 }
 
 static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
@@ -743,13 +740,18 @@ static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
 	return res;
 }
 
-static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
+static struct attr_stack *read_attr_from_index(const struct index_state *istate,
+					       const char *path,
+					       int macro_ok)
 {
 	struct attr_stack *res;
 	char *buf, *sp;
 	int lineno = 0;
 
-	buf = read_blob_data_from_index(use_index ? use_index : &the_index, path, NULL);
+	if (!istate)
+		return NULL;
+
+	buf = read_blob_data_from_index(istate, path, NULL);
 	if (!buf)
 		return NULL;
 
@@ -768,15 +770,16 @@ static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
 	return res;
 }
 
-static struct attr_stack *read_attr(const char *path, int macro_ok)
+static struct attr_stack *read_attr(const struct index_state *istate,
+				    const char *path, int macro_ok)
 {
 	struct attr_stack *res = NULL;
 
 	if (direction == GIT_ATTR_INDEX) {
-		res = read_attr_from_index(path, macro_ok);
+		res = read_attr_from_index(istate, path, macro_ok);
 	} else if (!is_bare_repository()) {
 		if (direction == GIT_ATTR_CHECKOUT) {
-			res = read_attr_from_index(path, macro_ok);
+			res = read_attr_from_index(istate, path, macro_ok);
 			if (!res)
 				res = read_attr_from_file(path, macro_ok);
 		} else if (direction == GIT_ATTR_CHECKIN) {
@@ -788,7 +791,7 @@ static struct attr_stack *read_attr(const char *path, int macro_ok)
 				 * We allow operation in a sparsely checked out
 				 * work tree, so read from it.
 				 */
-				res = read_attr_from_index(path, macro_ok);
+				res = read_attr_from_index(istate, path, macro_ok);
 		}
 	}
 
@@ -859,7 +862,8 @@ static void push_stack(struct attr_stack **attr_stack_p,
 	}
 }
 
-static void bootstrap_attr_stack(struct attr_stack **stack)
+static void bootstrap_attr_stack(const struct index_state *istate,
+				 struct attr_stack **stack)
 {
 	struct attr_stack *e;
 
@@ -883,7 +887,7 @@ static void bootstrap_attr_stack(struct attr_stack **stack)
 	}
 
 	/* root directory */
-	e = read_attr(GITATTRIBUTES_FILE, 1);
+	e = read_attr(istate, GITATTRIBUTES_FILE, 1);
 	push_stack(stack, e, xstrdup(""), 0);
 
 	/* info frame */
@@ -896,7 +900,8 @@ static void bootstrap_attr_stack(struct attr_stack **stack)
 	push_stack(stack, e, NULL, 0);
 }
 
-static void prepare_attr_stack(const char *path, int dirlen,
+static void prepare_attr_stack(const struct index_state *istate,
+			       const char *path, int dirlen,
 			       struct attr_stack **stack)
 {
 	struct attr_stack *info;
@@ -917,7 +922,7 @@ static void prepare_attr_stack(const char *path, int dirlen,
 	 * .gitattributes in deeper directories to shallower ones,
 	 * and finally use the built-in set as the default.
 	 */
-	bootstrap_attr_stack(stack);
+	bootstrap_attr_stack(istate, stack);
 
 	/*
 	 * Pop the "info" one that is always at the top of the stack.
@@ -973,7 +978,7 @@ static void prepare_attr_stack(const char *path, int dirlen,
 		strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len));
 		strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE);
 
-		next = read_attr(pathbuf.buf, 0);
+		next = read_attr(istate, pathbuf.buf, 0);
 
 		/* reset the pathbuf to not include "/.gitattributes" */
 		strbuf_setlen(&pathbuf, len);
@@ -1095,7 +1100,9 @@ static void determine_macros(struct all_attrs_item *all_attrs,
  * If check->check_nr is non-zero, only attributes in check[] are collected.
  * Otherwise all attributes are collected.
  */
-static void collect_some_attrs(const char *path, struct attr_check *check)
+static void collect_some_attrs(const struct index_state *istate,
+			       const char *path,
+			       struct attr_check *check)
 {
 	int i, pathlen, rem, dirlen;
 	const char *cp, *last_slash = NULL;
@@ -1114,7 +1121,7 @@ static void collect_some_attrs(const char *path, struct attr_check *check)
 		dirlen = 0;
 	}
 
-	prepare_attr_stack(path, dirlen, &check->stack);
+	prepare_attr_stack(istate, path, dirlen, &check->stack);
 	all_attrs_init(&g_attr_hashmap, check);
 	determine_macros(check->all_attrs, check->stack);
 
@@ -1136,11 +1143,13 @@ static void collect_some_attrs(const char *path, struct attr_check *check)
 	fill(path, pathlen, basename_offset, check->stack, check->all_attrs, rem);
 }
 
-int git_check_attr(const char *path, struct attr_check *check)
+int git_check_attr(const struct index_state *istate,
+		   const char *path,
+		   struct attr_check *check)
 {
 	int i;
 
-	collect_some_attrs(path, check);
+	collect_some_attrs(istate, path, check);
 
 	for (i = 0; i < check->nr; i++) {
 		size_t n = check->items[i].attr->attr_nr;
@@ -1153,12 +1162,13 @@ int git_check_attr(const char *path, struct attr_check *check)
 	return 0;
 }
 
-void git_all_attrs(const char *path, struct attr_check *check)
+void git_all_attrs(const struct index_state *istate,
+		   const char *path, struct attr_check *check)
 {
 	int i;
 
 	attr_check_reset(check);
-	collect_some_attrs(path, check);
+	collect_some_attrs(istate, path, check);
 
 	for (i = 0; i < check->all_attrs_nr; i++) {
 		const char *name = check->all_attrs[i].attr->name;