Drop the util package.

pkg/fs/fs.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2018 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package fs
+
+import (
+	"io"
+	"os"
+)
+
+// FileSystem groups basic os filesystem methods.
+type FileSystem interface {
+	Create(name string) (File, error)
+	Mkdir(name string, perm os.FileMode) error
+	Open(name string) (File, error)
+	Stat(name string) (os.FileInfo, error)
+	ReadFile(name string) ([]byte, error)
+	WriteFile(name string, data []byte) error
+}
+
+// File groups the basic os.File methods.
+type File interface {
+	io.ReadWriteCloser
+	Stat() (os.FileInfo, error)
+}