check-ignore: fix mix of directories and other file types

In check_ignore(), the first pathspec item determines the dtype for any
subsequent ones.  That means that a pathspec matching a regular file can
prevent following pathspecs from matching directories, which makes no
sense.  Fix that by determining the dtype for each pathspec separately,
by passing the value DT_UNKNOWN to last_exclude_matching() each time.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/check-ignore.c

@@ -72,7 +72,7 @@ static int check_ignore(struct dir_struct *dir,
 {
 	const char *full_path;
 	char *seen;
-	int num_ignored = 0, dtype = DT_UNKNOWN, i;
+	int num_ignored = 0, i;
 	struct exclude *exclude;
 	struct pathspec pathspec;
 
@@ -104,6 +104,7 @@ static int check_ignore(struct dir_struct *dir,
 		full_path = pathspec.items[i].match;
 		exclude = NULL;
 		if (!seen[i]) {
+			int dtype = DT_UNKNOWN;
 			exclude = last_exclude_matching(dir, &the_index,
 							full_path, &dtype);
 		}

t/t0008-ignores.sh

@@ -775,6 +775,26 @@ test_expect_success PIPE 'streaming support for --stdin' '
 	echo "$response" | grep "^::	two"
 '
 
+test_expect_success 'existing file and directory' '
+	test_when_finished "rm one" &&
+	test_when_finished "rmdir top-level-dir" &&
+	>one &&
+	mkdir top-level-dir &&
+	git check-ignore one top-level-dir >actual &&
+	grep one actual &&
+	grep top-level-dir actual
+'
+
+test_expect_success 'existing directory and file' '
+	test_when_finished "rm one" &&
+	test_when_finished "rmdir top-level-dir" &&
+	>one &&
+	mkdir top-level-dir &&
+	git check-ignore top-level-dir one >actual &&
+	grep one actual &&
+	grep top-level-dir actual
+'
+
 ############################################################################
 #
 # test whitespace handling