/
generic.go
57 lines (51 loc) · 2.2 KB
/
generic.go
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package resourceread
import (
"github.com/openshift/api"
admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
apiextensionsv1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/kubernetes/scheme"
migrationv1alpha1 "sigs.k8s.io/kube-storage-version-migrator/pkg/apis/migration/v1alpha1"
)
var (
genericScheme = runtime.NewScheme()
genericCodecs = serializer.NewCodecFactory(genericScheme)
genericCodec = genericCodecs.UniversalDeserializer()
)
func init() {
utilruntime.Must(api.Install(genericScheme))
utilruntime.Must(api.InstallKube(genericScheme))
utilruntime.Must(apiextensionsv1beta1.AddToScheme(genericScheme))
utilruntime.Must(apiextensionsv1.AddToScheme(genericScheme))
utilruntime.Must(migrationv1alpha1.AddToScheme(genericScheme))
utilruntime.Must(admissionregistrationv1.AddToScheme(genericScheme))
}
// ReadGenericWithUnstructured parses given yaml file using known scheme (see genericScheme above).
// If the object kind is not registered in the scheme, it returns Unstructured as the last resort.
func ReadGenericWithUnstructured(objBytes []byte) (runtime.Object, error) {
// Try to get a typed object first
typedObj, _, decodeErr := genericCodec.Decode(objBytes, nil, nil)
if decodeErr == nil {
return typedObj, nil
}
// Try unstructured, hoping to recover from "no kind XXX is registered for version YYY"
unstructuredObj, _, err := scheme.Codecs.UniversalDecoder().Decode(objBytes, nil, &unstructured.Unstructured{})
if err != nil {
// Return the original error
return nil, decodeErr
}
return unstructuredObj, nil
}
// ReadGenericWithUnstructuredOrDie parses given yaml file using known scheme (see genericScheme above).
// If the object kind is not registered in the scheme, it returns Unstructured as the last resort.
func ReadGenericWithUnstructuredOrDie(objBytes []byte) runtime.Object {
obj, err := ReadGenericWithUnstructured(objBytes)
if err != nil {
panic(err)
}
return obj
}