Introduce k8sdeps package to isolate k8s deps.

pkg/ifc/ifc.go

@@ -0,0 +1,26 @@
+/*
+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 ifc holds miscellaneous interfaces used by kustomize.
+package ifc
+
+// Decoder unmarshalls byte input into an object.
+type Decoder interface {
+	// SetInput accepts new input.
+	SetInput([]byte)
+	// Decode yields the next object from the input, else io.EOF
+	Decode(interface{}) error
+}