class Chef::Knife::RoleEnvRunListClear

def clear_env_run_list(role, environment)
  nlist = []
  role.env_run_lists_add(environment => nlist)
end

def run
  if @name_args.size > 2
    ui.fatal "You must not supply an environment run list."
    show_usage
    exit 1
  end
  role = Chef::Role.load(@name_args[0])
  role.name(@name_args[0])
  environment = @name_args[1]
  clear_env_run_list(role, environment)
  role.save
  config[:env_run_list] = true
  output(format_for_display(role))
end