Introduce k8sdeps package to isolate k8s deps.

pkg/internal/k8sdeps/decoder.go

@@ -0,0 +1,47 @@
+/*
+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 k8sdeps
+
+import (
+	"bytes"
+	"errors"
+	"k8s.io/apimachinery/pkg/util/yaml"
+)
+
+// KustDecoder unmarshalls bytes to objects.
+type KustDecoder struct {
+	d *yaml.YAMLOrJSONDecoder
+}
+
+// NewKustDecoder returns a new KustDecoder.
+func NewKustDecoder() *KustDecoder {
+	return &KustDecoder{}
+}
+
+// SetInput initializes an apimachinery decoder.
+func (k *KustDecoder) SetInput(in []byte) {
+	k.d = yaml.NewYAMLOrJSONDecoder(
+		bytes.NewReader(in), 1024)
+}
+
+// Decode delegates to the apimachinery decoder.
+func (k *KustDecoder) Decode(into interface{}) error {
+	if k.d == nil {
+		return errors.New("no decoder")
+	}
+	return k.d.Decode(into)
+}