forked from weaveworks/libgitops
-
Notifications
You must be signed in to change notification settings - Fork 0
/
defaulter.go
76 lines (64 loc) · 1.92 KB
/
defaulter.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
package serializer
import (
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/util/errors"
)
func newDefaulter(scheme *runtime.Scheme) *defaulter {
return &defaulter{scheme}
}
type defaulter struct {
scheme *runtime.Scheme
}
// NewDefaultedObject returns a new, defaulted object. It is essentially scheme.New() and
// scheme.Default(obj), but with extra logic to also cover internal versions.
// Important to note here is that the TypeMeta information is NOT applied automatically.
func (d *defaulter) NewDefaultedObject(gvk schema.GroupVersionKind) (runtime.Object, error) {
obj, err := d.scheme.New(gvk)
if err != nil {
return nil, err
}
// Default the new object, this will take care of internal defaulting automatically
if err := d.Default(obj); err != nil {
return nil, err
}
return obj, nil
}
func (d *defaulter) Default(objs ...runtime.Object) error {
errs := []error{}
for _, obj := range objs {
errs = append(errs, d.runDefaulting(obj))
}
return errors.NewAggregate(errs)
}
func (d *defaulter) runDefaulting(obj runtime.Object) error {
// First, get the groupversionkind of the object
gvk, err := GVKForObject(d.scheme, obj)
if err != nil {
return err
}
// If the version is external, just default it and return.
if gvk.Version != runtime.APIVersionInternal {
d.scheme.Default(obj)
return nil
}
// We know that the current object is internal
// Get the preferred external version...
gv, err := prioritizedVersionForGroup(d.scheme, gvk.Group)
if err != nil {
return err
}
// ...and make a new object of it
external, err := d.scheme.New(gv.WithKind(gvk.Kind))
if err != nil {
return err
}
// Convert the internal object to the external
if err := d.scheme.Convert(obj, external, nil); err != nil {
return err
}
// Default the external
d.scheme.Default(external)
// And convert back to internal
return d.scheme.Convert(external, obj, nil)
}