/
loader.go
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/
loader.go
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// Copyright (c) 2018 SAP SE or an SAP affiliate company. All rights reserved. This file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
//
// 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 loader
import (
"os"
"github.com/metal-stack/gardener-extension-provider-metal/pkg/apis/config"
"github.com/metal-stack/gardener-extension-provider-metal/pkg/apis/config/install"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/runtime/serializer/json"
"k8s.io/apimachinery/pkg/runtime/serializer/versioning"
)
var (
Codec runtime.Codec
Scheme *runtime.Scheme
)
func init() {
Scheme = runtime.NewScheme()
install.Install(Scheme)
yamlSerializer := json.NewYAMLSerializer(json.DefaultMetaFactory, Scheme, Scheme)
Codec = versioning.NewDefaultingCodecForScheme(
Scheme,
yamlSerializer,
yamlSerializer,
schema.GroupVersion{Version: "v1alpha1"},
runtime.InternalGroupVersioner,
)
}
// LoadFromFile takes a filename and de-serializes the contents into ControllerConfiguration object.
func LoadFromFile(filename string) (*config.ControllerConfiguration, error) {
bytes, err := os.ReadFile(filename)
if err != nil {
return nil, err
}
return Load(bytes)
}
// Load takes a byte slice and de-serializes the contents into ControllerConfiguration object.
// Encapsulates de-serialization without assuming the source is a file.
func Load(data []byte) (*config.ControllerConfiguration, error) {
cfg := &config.ControllerConfiguration{}
if len(data) == 0 {
return cfg, nil
}
decoded, _, err := Codec.Decode(data, &schema.GroupVersionKind{Version: "v1alpha1", Kind: "Config"}, cfg)
if err != nil {
return nil, err
}
return decoded.(*config.ControllerConfiguration), nil
}