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options.go
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options.go
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// Copyright 2022 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 app
import (
"fmt"
"os"
"github.com/spf13/pflag"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"github.com/gardener/gardener/pkg/resourcemanager/apis/config"
resourcemanagerv1alpha1 "github.com/gardener/gardener/pkg/resourcemanager/apis/config/v1alpha1"
resourcemanagervalidation "github.com/gardener/gardener/pkg/resourcemanager/apis/config/validation"
)
var configDecoder runtime.Decoder
func init() {
configScheme := runtime.NewScheme()
schemeBuilder := runtime.NewSchemeBuilder(
config.AddToScheme,
resourcemanagerv1alpha1.AddToScheme,
)
utilruntime.Must(schemeBuilder.AddToScheme(configScheme))
configDecoder = serializer.NewCodecFactory(configScheme).UniversalDecoder()
}
type options struct {
configFile string
config *config.ResourceManagerConfiguration
}
func (o *options) addFlags(fs *pflag.FlagSet) {
fs.StringVar(&o.configFile, "config", o.configFile, "Path to configuration file.")
}
func (o *options) complete() error {
if len(o.configFile) == 0 {
return fmt.Errorf("missing config file")
}
data, err := os.ReadFile(o.configFile)
if err != nil {
return fmt.Errorf("error reading config file: %w", err)
}
o.config = &config.ResourceManagerConfiguration{}
if err = runtime.DecodeInto(configDecoder, data, o.config); err != nil {
return fmt.Errorf("error decoding config: %w", err)
}
return nil
}
func (o *options) validate() error {
if errs := resourcemanagervalidation.ValidateResourceManagerConfiguration(o.config); len(errs) > 0 {
return errs.ToAggregate()
}
return nil
}