dir.c: git-status --ignored: don't drop ignored directories

'git-status --ignored' drops ignored directories if they contain untracked
files in an untracked sub directory.

Fix it by getting exact (recursive) excluded status in treat_directory.

Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

dir.c

@@ -1104,6 +1104,15 @@ static enum directory_treatment treat_directory(struct dir_struct *dir,
 
 	/* This is the "show_other_directories" case */
 
+	/* might be a sub directory in an excluded directory */
+	if (!exclude) {
+		struct path_exclude_check check;
+		int dt = DT_DIR;
+		path_exclude_check_init(&check, dir);
+		exclude = is_path_excluded(&check, dirname, len, &dt);
+		path_exclude_check_clear(&check);
+	}
+
 	/*
 	 * We are looking for ignored files and our directory is not ignored,
 	 * check if it contains only ignored files

t/t7061-wtstatus-ignore.sh

@@ -143,4 +143,31 @@ test_expect_success 'status ignored tracked directory and uncommitted file with
 	test_cmp expected actual
 '
 
+cat >expected <<\EOF
+?? .gitignore
+?? actual
+?? expected
+!! tracked/
+EOF
+
+test_expect_success 'status ignored tracked directory with uncommitted file in untracked subdir with --ignore' '
+	rm -rf tracked/uncommitted &&
+	mkdir tracked/ignored &&
+	: >tracked/ignored/uncommitted &&
+	git status --porcelain --ignored >actual &&
+	test_cmp expected actual
+'
+
+cat >expected <<\EOF
+?? .gitignore
+?? actual
+?? expected
+!! tracked/ignored/uncommitted
+EOF
+
+test_expect_success 'status ignored tracked directory with uncommitted file in untracked subdir with --ignore -u' '
+	git status --porcelain --ignored -u >actual &&
+	test_cmp expected actual
+'
+
 test_done