-
Notifications
You must be signed in to change notification settings - Fork 2.7k
/
patcher.go
110 lines (91 loc) · 2.86 KB
/
patcher.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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
/*
Copyright 2020 The Rook Authors. 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 k8sutil
import (
"context"
"reflect"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
kerrors "k8s.io/apimachinery/pkg/util/errors"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// Patcher is a utility for patching of objects and their status.
// Portion of this file is coming from https://github.com/kubernetes-sigs/cluster-api/blob/master/util/patch/patch.go
type Patcher struct {
client client.Client
hasStatus bool
old map[string]interface{}
oldStatus interface{}
objectPatch client.Patch
statusPatch client.Patch
}
func NewPatcher(object client.Object, crclient client.Client) (*Patcher, error) {
if object == nil {
return nil, errors.Errorf("expected non-nil resource")
}
if _, ok := object.(runtime.Unstructured); ok {
object = object.DeepCopyObject().(client.Object)
}
old, err := runtime.DefaultUnstructuredConverter.ToUnstructured(object)
if err != nil {
return nil, err
}
hasStatus := false
oldStatus, ok, err := unstructured.NestedFieldCopy(old, "status")
if err != nil {
return nil, err
}
if ok {
hasStatus = true
unstructured.RemoveNestedField(old, "status")
}
return &Patcher{
client: crclient,
hasStatus: hasStatus,
old: old,
oldStatus: oldStatus,
objectPatch: client.MergeFrom(object.DeepCopyObject().(client.Object)),
statusPatch: client.MergeFrom(object.DeepCopyObject().(client.Object)),
}, nil
}
func (p *Patcher) Patch(ctx context.Context, object client.Object) error {
if object == nil {
return errors.Errorf("expected non-nil resource")
}
newObj, err := runtime.DefaultUnstructuredConverter.ToUnstructured(object)
if err != nil {
return err
}
hasStatus := false
newStatus, ok, err := unstructured.NestedFieldCopy(newObj, "status")
if err != nil {
return err
}
if ok {
hasStatus = true
unstructured.RemoveNestedField(newObj, "status")
}
var errs []error
if !reflect.DeepEqual(p.old, newObj) {
if err := p.client.Patch(ctx, object, p.objectPatch); err != nil {
errs = append(errs, err)
}
}
if (p.hasStatus || hasStatus) && !reflect.DeepEqual(p.oldStatus, newStatus) {
if err := p.client.Status().Patch(ctx, object, p.statusPatch); err != nil {
errs = append(errs, err)
}
}
return kerrors.NewAggregate(errs)
}