containerized-data-importer/tools/manifest-generator/marshaller.go

79 lines
2.0 KiB
Go

/*
* 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.
*
*/
// this file directly copy/pasted from KubeVirt project here:
// https://github.com/kubevirt/kubevirt/blob/master/tools/util/marshaller.go
package main
import (
"encoding/json"
"io"
"strings"
"github.com/ghodss/yaml"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
)
// MarshallObject marshalls an object to yaml appropriate for kubectl
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")
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
}