forked from kubevirt/kubevirt
/
marshaller.go
109 lines (95 loc) · 3 KB
/
marshaller.go
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/*
* This file is part of the KubeVirt project
*
* 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.
*
* Copyright 2018 Red Hat, Inc.
*
*/
package util
import (
"encoding/json"
"io"
"strings"
"kubevirt.io/kubevirt/pkg/api/v1"
"github.com/ghodss/yaml"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
)
func MarshallObject(obj interface{}, writer io.Writer) error {
jsonBytes, err := json.Marshal(obj)
if err != nil {
return err
}
var r unstructured.Unstructured
if err := json.Unmarshal(jsonBytes, &r.Object); err != nil {
return err
}
// remove status and metadata.creationTimestamp
unstructured.RemoveNestedField(r.Object, "metadata", "creationTimestamp")
unstructured.RemoveNestedField(r.Object, "spec", "template", "metadata", "creationTimestamp")
unstructured.RemoveNestedField(r.Object, "status")
// remove dataSource from PVCs if empty
templates, exists, err := unstructured.NestedSlice(r.Object, "spec", "dataVolumeTemplates")
if exists {
for _, tmpl := range templates {
template := tmpl.(map[string]interface{})
_, exists, err = unstructured.NestedString(template, "spec", "pvc", "dataSource")
if !exists {
unstructured.RemoveNestedField(template, "spec", "pvc", "dataSource")
}
}
unstructured.SetNestedSlice(r.Object, templates, "spec", "dataVolumeTemplates")
}
objects, exists, err := unstructured.NestedSlice(r.Object, "objects")
if exists {
for _, obj := range objects {
object := obj.(map[string]interface{})
kind, exists, _ := unstructured.NestedString(object, "kind")
if exists && kind == "PersistentVolumeClaim" {
_, exists, err = unstructured.NestedString(object, "spec", "dataSource")
if !exists {
unstructured.RemoveNestedField(object, "spec", "dataSource")
}
}
}
unstructured.SetNestedSlice(r.Object, objects, "objects")
}
// remove "managed by operator" label...
labels, exists, err := unstructured.NestedMap(r.Object, "metadata", "labels")
if exists {
delete(labels, v1.ManagedByLabel)
unstructured.SetNestedMap(r.Object, labels, "metadata", "labels")
}
jsonBytes, err = json.Marshal(r.Object)
if err != nil {
return err
}
yamlBytes, err := yaml.JSONToYAML(jsonBytes)
if err != nil {
return err
}
// fix templates by removing quotes...
s := string(yamlBytes)
s = strings.Replace(s, "'{{", "{{", -1)
s = strings.Replace(s, "}}'", "}}", -1)
yamlBytes = []byte(s)
_, err = writer.Write([]byte("---\n"))
if err != nil {
return err
}
_, err = writer.Write(yamlBytes)
if err != nil {
return err
}
return nil
}