Move attach command to cobra.

Signed-off-by: Zhang Wei <zhangwei555@huawei.com>
Upstream-commit: eceb8625a94e3504fca7b27d8156bcf11a93bf4f
Component: engine

components/engine/cli/cobraadaptor/adaptor.go

@@ -34,6 +34,7 @@ func NewCobraAdaptor(clientFlags *cliflags.ClientFlags) CobraAdaptor {
 	rootCmd.SetFlagErrorFunc(cli.FlagErrorFunc)
 	rootCmd.SetOutput(stdout)
 	rootCmd.AddCommand(
+		container.NewAttachCommand(dockerCli),
 		container.NewCreateCommand(dockerCli),
 		container.NewDiffCommand(dockerCli),
 		container.NewExportCommand(dockerCli),

components/engine/cli/usage.go

@@ -8,7 +8,6 @@ type Command struct {
 
 // DockerCommandUsage lists the top level docker commands and their short usage
 var DockerCommandUsage = []Command{
-	{"attach", "Attach to a running container"},
 	{"build", "Build an image from a Dockerfile"},
 	{"commit", "Create a new image from a container's changes"},
 	{"cp", "Copy files/folders between a container and the local filesystem"},