package commands import ( "fmt" "io" "os" "github.com/docker/machine/libmachine" "github.com/docker/machine/libmachine/mcndockerclient" ) func cmdVersion(c CommandLine, api libmachine.API) error { return printVersion(c, api, os.Stdout) } func printVersion(c CommandLine, api libmachine.API, out io.Writer) error { if len(c.Args()) == 0 { c.ShowVersion() return nil } if len(c.Args()) != 1 { return ErrExpectedOneMachine } host, err := api.Load(c.Args().First()) if err != nil { return err } version, err := mcndockerclient.DockerVersion(host) if err != nil { return err } fmt.Fprintln(out, version) return nil }