Move Codec functions to their own file

pkg/runtime/codec.go

+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+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 runtime
+
+// CodecFor returns a Codec that invokes Encode with the provided version.
+func CodecFor(scheme *Scheme, version string) Codec {
+	return &codecWrapper{scheme, version}
+}
+
+// EncodeOrDie is a version of Encode which will panic instead of returning an error. For tests.
+func EncodeOrDie(codec Codec, obj Object) string {
+	bytes, err := codec.Encode(obj)
+	if err != nil {
+		panic(err)
+	}
+	return string(bytes)
+}
+
+// codecWrapper implements encoding to an alternative
+// default version for a scheme.
+type codecWrapper struct {
+	*Scheme
+	version string
+}
+
+// Encode implements Codec
+func (c *codecWrapper) Encode(obj Object) ([]byte, error) {
+	return c.Scheme.EncodeToVersion(obj, c.version)
+}

pkg/runtime/scheme.go

@@ -24,32 +24,6 @@ import (
 	"gopkg.in/v1/yaml"
 )
 
-// codecWrapper implements encoding to an alternative
-// default version for a scheme.
-type codecWrapper struct {
-	*Scheme
-	version string
-}
-
-// Encode implements Codec
-func (c *codecWrapper) Encode(obj Object) ([]byte, error) {
-	return c.Scheme.EncodeToVersion(obj, c.version)
-}
-
-// CodecFor returns a Codec that invokes Encode with the provided version.
-func CodecFor(scheme *Scheme, version string) Codec {
-	return &codecWrapper{scheme, version}
-}
-
-// EncodeOrDie is a version of Encode which will panic instead of returning an error. For tests.
-func EncodeOrDie(codec Codec, obj Object) string {
-	bytes, err := codec.Encode(obj)
-	if err != nil {
-		panic(err)
-	}
-	return string(bytes)
-}
-
 // Scheme defines methods for serializing and deserializing API objects. It
 // is an adaptation of conversion's Scheme for our API objects.
 type Scheme struct {