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getter.go
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getter.go
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// Copyright (c) 2021 Terminus, Inc.
//
// 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 helm
import (
"os"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/client-go/discovery"
"k8s.io/client-go/discovery/cached/memory"
"k8s.io/client-go/rest"
"k8s.io/client-go/restmapper"
"k8s.io/client-go/tools/clientcmd"
)
// RESTClientGetterImpl impl genericclioptions.RESTClientGetter
type RESTClientGetterImpl struct {
rc *rest.Config
}
// NewRESTClientGetterImpl new RESTClientGetterImpl
func NewRESTClientGetterImpl(rc *rest.Config) *RESTClientGetterImpl {
return &RESTClientGetterImpl{
rc: rc,
}
}
func (r *RESTClientGetterImpl) ToRESTConfig() (*rest.Config, error) {
return r.rc, nil
}
func (r *RESTClientGetterImpl) ToDiscoveryClient() (discovery.CachedDiscoveryInterface, error) {
if dc, err := discovery.NewDiscoveryClientForConfig(r.rc); err != nil {
return nil, err
} else {
return memory.NewMemCacheClient(dc), nil
}
}
func (r *RESTClientGetterImpl) ToRESTMapper() (meta.RESTMapper, error) {
dc, err := r.ToDiscoveryClient()
if err != nil {
return nil, err
}
mapper := restmapper.NewDeferredDiscoveryRESTMapper(dc)
return restmapper.NewShortcutExpander(mapper, dc, nil), nil
}
func (r *RESTClientGetterImpl) ToRawKubeConfigLoader() clientcmd.ClientConfig {
loadingRules := clientcmd.NewDefaultClientConfigLoadingRules()
loadingRules.DefaultClientConfig = &clientcmd.DefaultClientConfig
overrides := &clientcmd.ConfigOverrides{ClusterDefaults: clientcmd.ClusterDefaults}
// e.g. helm.sh/helm/v3/pkg/cli/environment.go
overrides.Context.Namespace = os.Getenv(EnvHelmNamespace)
return clientcmd.NewNonInteractiveDeferredLoadingClientConfig(loadingRules, overrides)
}