etcdctlv3: a new command auth

Currently a stub of subcommand "auth enable" is implemented.

etcdctlv3/command/auth_command.go

@@ -0,0 +1,54 @@
+// Copyright 2016 Nippon Telegraph and Telephone Corporation.
+//
+// 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 command
+
+import (
+	"fmt"
+
+	"github.com/coreos/etcd/Godeps/_workspace/src/github.com/spf13/cobra"
+	"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/context"
+)
+
+// NewAuthCommand returns the cobra command for "auth".
+func NewAuthCommand() *cobra.Command {
+	ac := &cobra.Command{
+		Use:   "auth <enable or disable>",
+		Short: "Enable or disable authentication.",
+	}
+
+	ac.AddCommand(NewAuthEnableCommand())
+
+	return ac
+}
+
+func NewAuthEnableCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   "enable",
+		Short: "enable authentication",
+		Run:   authEnableCommandFunc,
+	}
+}
+
+// authEnableCommandFunc executes the "auth enable" command.
+func authEnableCommandFunc(cmd *cobra.Command, args []string) {
+	if len(args) != 0 {
+		ExitWithError(ExitBadArgs, fmt.Errorf("auth enable command does not accept argument."))
+	}
+
+	_, err := mustClientFromCmd(cmd).Auth.AuthEnable(context.TODO())
+	if err != nil {
+		ExitWithError(ExitError, err)
+	}
+}

etcdctlv3/main.go

@@ -63,6 +63,7 @@ func init() {
 		command.NewSnapshotCommand(),
 		command.NewMakeMirrorCommand(),
 		command.NewLockCommand(),
+		command.NewAuthCommand(),
 	)
 }