Add get/delete cluster, delete context to kubectl

pkg/kubectl/cmd/config/delete_cluster.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2016 The Kubernetes 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 config
+
+import (
+	"fmt"
+	"io"
+
+	"github.com/spf13/cobra"
+	"k8s.io/kubernetes/pkg/client/unversioned/clientcmd"
+	cmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
+)
+
+func NewCmdConfigDeleteCluster(out io.Writer, configAccess clientcmd.ConfigAccess) *cobra.Command {
+	cmd := &cobra.Command{
+		Use:   "delete-cluster NAME",
+		Short: "Delete the specified cluster from the kubeconfig",
+		Run: func(cmd *cobra.Command, args []string) {
+			err := runDeleteCluster(out, configAccess, cmd)
+			cmdutil.CheckErr(err)
+		},
+	}
+
+	return cmd
+}
+
+func runDeleteCluster(out io.Writer, configAccess clientcmd.ConfigAccess, cmd *cobra.Command) error {
+	config, err := configAccess.GetStartingConfig()
+	if err != nil {
+		return err
+	}
+
+	args := cmd.Flags().Args()
+	if len(args) != 1 {
+		cmd.Help()
+		return nil
+	}
+
+	configFile := configAccess.GetDefaultFilename()
+	if configAccess.IsExplicitFile() {
+		configFile = configAccess.GetExplicitFile()
+	}
+
+	name := args[0]
+	_, ok := config.Clusters[name]
+	if !ok {
+		return fmt.Errorf("cannot delete cluster %s, not in %s", name, configFile)
+	}
+
+	delete(config.Clusters, name)
+
+	if err := clientcmd.ModifyConfig(configAccess, *config, true); err != nil {
+		return err
+	}
+
+	fmt.Fprintf(out, "deleted cluster %s from %s", name, configFile)
+
+	return nil
+}