Use spf13/cobra for docker rename

This fix is part of the effort to convert commands to spf13/cobra #23211.

Thif fix coverted command `docker rename` to use spf13/cobra

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
Upstream-commit: 70f7ccb304f9246bc9c2bfe0e30d3a2bd8fd42f8
Component: engine

components/engine/api/client/commands.go

@@ -22,7 +22,6 @@ func (cli *DockerCli) Command(name string) func(...string) error {
 		"ps":      cli.CmdPs,
 		"pull":    cli.CmdPull,
 		"push":    cli.CmdPush,
-		"rename":  cli.CmdRename,
 		"restart": cli.CmdRestart,
 		"rm":      cli.CmdRm,
 		"save":    cli.CmdSave,

components/engine/api/client/container/rename.go

@@ -0,0 +1,53 @@
+package container
+
+import (
+	"fmt"
+	"strings"
+
+	"golang.org/x/net/context"
+
+	"github.com/docker/docker/api/client"
+	"github.com/docker/docker/cli"
+	"github.com/spf13/cobra"
+)
+
+type renameOptions struct {
+	oldName string
+	newName string
+}
+
+// NewRenameCommand creats a new cobra.Command for `docker rename`
+func NewRenameCommand(dockerCli *client.DockerCli) *cobra.Command {
+	var opts renameOptions
+
+	cmd := &cobra.Command{
+		Use:   "rename OLD_NAME NEW_NAME",
+		Short: "Rename a container",
+		Args:  cli.ExactArgs(2),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.oldName = args[0]
+			opts.newName = args[1]
+			return runRename(dockerCli, &opts)
+		},
+	}
+	cmd.SetFlagErrorFunc(flagErrorFunc)
+
+	return cmd
+}
+
+func runRename(dockerCli *client.DockerCli, opts *renameOptions) error {
+	ctx := context.Background()
+
+	oldName := strings.TrimSpace(opts.oldName)
+	newName := strings.TrimSpace(opts.newName)
+
+	if oldName == "" || newName == "" {
+		return fmt.Errorf("Error: Neither old nor new names may be empty")
+	}
+
+	if err := dockerCli.Client().ContainerRename(ctx, oldName, newName); err != nil {
+		fmt.Fprintf(dockerCli.Err(), "%s\n", err)
+		return fmt.Errorf("Error: failed to rename container named %s", oldName)
+	}
+	return nil
+}

components/engine/api/client/rename.go

@@ -1,34 +0,0 @@
-package client
-
-import (
-	"fmt"
-	"strings"
-
-	"golang.org/x/net/context"
-
-	Cli "github.com/docker/docker/cli"
-	flag "github.com/docker/docker/pkg/mflag"
-)
-
-// CmdRename renames a container.
-//
-// Usage: docker rename OLD_NAME NEW_NAME
-func (cli *DockerCli) CmdRename(args ...string) error {
-	cmd := Cli.Subcmd("rename", []string{"OLD_NAME NEW_NAME"}, Cli.DockerCommands["rename"].Description, true)
-	cmd.Require(flag.Exact, 2)
-
-	cmd.ParseFlags(args, true)
-
-	oldName := strings.TrimSpace(cmd.Arg(0))
-	newName := strings.TrimSpace(cmd.Arg(1))
-
-	if oldName == "" || newName == "" {
-		return fmt.Errorf("Error: Neither old nor new names may be empty")
-	}
-
-	if err := cli.client.ContainerRename(context.Background(), oldName, newName); err != nil {
-		fmt.Fprintf(cli.err, "%s\n", err)
-		return fmt.Errorf("Error: failed to rename container named %s", oldName)
-	}
-	return nil
-}