{ hscloud, pkgs, hscloudForPkgs, ... }:

{
  # Used by clustercfg to figure out which machines need kube certs.
  kubeMachineNames = let
    isKubeMachine = n: value:
      n != "__readTree" &&
      (builtins.hasAttr "hscloud" value.options) &&
      (builtins.hasAttr "kube" value.options.hscloud) &&
      value.options.hscloud.kube.control.enable.value;
    machines = pkgs.lib.filterAttrs isKubeMachine hscloud.ops.machines;
    names = pkgs.lib.mapAttrsToList (name: _: name) machines;
  in names;
}