/
client.go
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/
client.go
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// Copyright 2018 The Operator-SDK 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 client
import (
"io"
"helm.sh/helm/v3/pkg/kube"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/cli-runtime/pkg/resource"
"k8s.io/client-go/discovery"
cached "k8s.io/client-go/discovery/cached"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
"sigs.k8s.io/controller-runtime/pkg/manager"
)
var _ genericclioptions.RESTClientGetter = &restClientGetter{}
type restClientGetter struct {
restConfig *rest.Config
discoveryClient discovery.CachedDiscoveryInterface
restMapper meta.RESTMapper
namespaceConfig clientcmd.ClientConfig
}
func (c *restClientGetter) ToRESTConfig() (*rest.Config, error) {
return c.restConfig, nil
}
func (c *restClientGetter) ToDiscoveryClient() (discovery.CachedDiscoveryInterface, error) {
return c.discoveryClient, nil
}
func (c *restClientGetter) ToRESTMapper() (meta.RESTMapper, error) {
return c.restMapper, nil
}
func (c *restClientGetter) ToRawKubeConfigLoader() clientcmd.ClientConfig {
return c.namespaceConfig
}
var _ clientcmd.ClientConfig = &namespaceClientConfig{}
type namespaceClientConfig struct {
namespace string
}
func (c namespaceClientConfig) RawConfig() (clientcmdapi.Config, error) {
return clientcmdapi.Config{}, nil
}
func (c namespaceClientConfig) ClientConfig() (*rest.Config, error) {
return nil, nil
}
func (c namespaceClientConfig) Namespace() (string, bool, error) {
return c.namespace, false, nil
}
func (c namespaceClientConfig) ConfigAccess() clientcmd.ConfigAccess {
return nil
}
func NewRESTClientGetter(mgr manager.Manager, ns string) (genericclioptions.RESTClientGetter, error) {
cfg := mgr.GetConfig()
dc, err := discovery.NewDiscoveryClientForConfig(cfg)
if err != nil {
return nil, err
}
cdc := cached.NewMemCacheClient(dc)
rm := mgr.GetRESTMapper()
return &restClientGetter{
restConfig: cfg,
discoveryClient: cdc,
restMapper: rm,
namespaceConfig: &namespaceClientConfig{ns},
}, nil
}
var _ kube.Interface = &ownerRefInjectingClient{}
func NewOwnerRefInjectingClient(base kube.Client, ownerRef metav1.OwnerReference) kube.Interface {
return &ownerRefInjectingClient{
refs: []metav1.OwnerReference{ownerRef},
Client: base,
}
}
type ownerRefInjectingClient struct {
refs []metav1.OwnerReference
kube.Client
}
func (c *ownerRefInjectingClient) Build(reader io.Reader, validate bool) (kube.ResourceList, error) {
resourceList, err := c.Client.Build(reader, validate)
if err != nil {
return resourceList, err
}
err = resourceList.Visit(func(r *resource.Info, err error) error {
if err != nil {
return err
}
objMap, err := runtime.DefaultUnstructuredConverter.ToUnstructured(r.Object)
if err != nil {
return err
}
u := &unstructured.Unstructured{Object: objMap}
if r.ResourceMapping().Scope == meta.RESTScopeNamespace {
u.SetOwnerReferences(c.refs)
}
return nil
})
if err != nil {
return nil, err
}
return resourceList, nil
}