func NewRunStep(args, cmd string, commit bool) *RunStep {
	return &RunStep{
		baseStep: newBaseStep(Run, args, commit),
		cmd:      cmd,
	}
}
NewRunStep returns a BuildStep from given arguments.
package step
import (
	"errors"
	"github.com/uber/makisu/lib/context"
	"github.com/uber/makisu/lib/docker/image"
	"github.com/uber/makisu/lib/log"
	"github.com/uber/makisu/lib/shell"
)
type RunStep struct {
	*baseStep
	cmd string
	user string
}