Initial commit

Signed-off-by: Andy Goldstein <andy.goldstein@gmail.com>

pkg/util/encode/encode.go

@@ -0,0 +1,67 @@
+/*
+Copyright 2017 Heptio Inc.
+
+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 encode
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+
+	"k8s.io/apimachinery/pkg/runtime"
+
+	"github.com/heptio/ark/pkg/apis/ark/v1"
+	"github.com/heptio/ark/pkg/generated/clientset/scheme"
+)
+
+// Encode converts the provided object to the specified format
+// and returns a byte slice of the encoded data.
+func Encode(obj runtime.Object, format string) ([]byte, error) {
+	buf := new(bytes.Buffer)
+
+	if err := EncodeTo(obj, format, buf); err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
+// EncodeTo converts the provided object to the specified format and
+// writes the encoded data to the provided io.Writer.
+func EncodeTo(obj runtime.Object, format string, w io.Writer) error {
+	encoder, err := EncoderFor(format)
+	if err != nil {
+		return err
+	}
+
+	return encoder.Encode(obj, w)
+}
+
+// EncoderFor gets the appropriate encoder for the specified format.
+func EncoderFor(format string) (runtime.Encoder, error) {
+	var encoder runtime.Encoder
+	desiredMediaType := fmt.Sprintf("application/%s", format)
+	serializerInfo, found := runtime.SerializerInfoForMediaType(scheme.Codecs.SupportedMediaTypes(), desiredMediaType)
+	if !found {
+		return nil, fmt.Errorf("unable to locate an encoder for %q", desiredMediaType)
+	}
+	if serializerInfo.PrettySerializer != nil {
+		encoder = serializerInfo.PrettySerializer
+	} else {
+		encoder = serializerInfo.Serializer
+	}
+	encoder = scheme.Codecs.EncoderForVersion(encoder, v1.SchemeGroupVersion)
+	return encoder, nil
+}