/
helper.go
42 lines (35 loc) · 1.22 KB
/
helper.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
/*
Copyright 2020 The OpenEBS 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 migrate
import (
"encoding/json"
"fmt"
"k8s.io/apimachinery/pkg/util/strategicpatch"
)
// GetPatchData returns patch data by
// marshalling and taking diff of two objects
func GetPatchData(oldObj, newObj interface{}) ([]byte, error) {
oldData, err := json.Marshal(oldObj)
if err != nil {
return nil, fmt.Errorf("marshal old object failed: %v", err)
}
newData, err := json.Marshal(newObj)
if err != nil {
return nil, fmt.Errorf("mashal new object failed: %v", err)
}
patchBytes, err := strategicpatch.CreateTwoWayMergePatch(oldData, newData, oldObj)
if err != nil {
return nil, fmt.Errorf("CreateTwoWayMergePatch failed: %v", err)
}
return patchBytes, nil
}