/
gvr.go
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/
gvr.go
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// Copyright © 2020 The Tekton Authors.
//
// 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 installer
import (
"sync"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/discovery"
"k8s.io/client-go/restmapper"
)
var (
doOnce sync.Once
apiGroupRes []*restmapper.APIGroupResources
)
func getGroupVersionResource(gr schema.GroupVersionResource, discovery discovery.DiscoveryInterface) (*schema.GroupVersionResource, error) {
var err error
doOnce.Do(func() {
err = initializeAPIGroupRes(discovery)
})
if err != nil {
return nil, err
}
rm := restmapper.NewDiscoveryRESTMapper(apiGroupRes)
gvr, err := rm.ResourceFor(gr)
if err != nil {
return nil, err
}
return &gvr, nil
}
func initializeAPIGroupRes(discovery discovery.DiscoveryInterface) error {
var err error
apiGroupRes, err = restmapper.GetAPIGroupResources(discovery)
if err != nil {
return err
}
return nil
}