nixos/corefreq: add program defining both the daemon service and its kernel module

  ./programs/cpu-energy-meter.nix

  ./programs/command-not-found/command-not-found.nix

  ./programs/coolercontrol.nix

  ./programs/corefreq.nix

  ./programs/criu.nix

  ./programs/darling.nix

  ./programs/dconf.nix

{

  config,

  lib,

  pkgs,

  ...

}:

let

  cfg = config.programs.corefreq;

  kernelPackages = config.boot.kernelPackages;

in

{

  options = {

    programs.corefreq = {

      enable = lib.mkEnableOption "Whether to enable the corefreq daemon and kernel module";

      package = lib.mkOption {

        type = lib.types.package;

        default = kernelPackages.corefreq;

        defaultText = lib.literalExpression "config.boot.kernelPackages.corefreq";

        description = ''

          The corefreq package to use.

        '';

      };

    };

  };

  config = lib.mkIf cfg.enable {

    environment.systemPackages = [ cfg.package ];

    boot.extraModulePackages = [ cfg.package ];

    boot.kernelModules = [ "corefreqk" ];

    # Create a systemd service for the corefreq daemon

    systemd.services.corefreq = {

      description = "CoreFreq daemon";

      wantedBy = [ "multi-user.target" ];

      serviceConfig = {

        ExecStart = lib.getExe' cfg.package "corefreqd";

      };

    };

  };

}