dotfiles/nixos/systems/omen/inputplug.nix

{...}: {
  home-manager.users."main" = {
    pkgs,
    lib,
    ...
  }: let
    script = pkgs.writeShellScript "inputplug.sh" ''
      mkdir -p $HOME/.cache/inputplug
      set -x

      _event_type="$1"
      _device_id="$2"
      _device_type="$3"
      _device_name="$4"

      _keyboard_id=$(xinput list | grep "AT Translated Set 2 keyboard" | cut -f 2 -d $'\t' | cut -f 2 -d '=')
      _property_id=$(xinput list-props 16 | grep "Device Enabled" | cut -f 2 | sed -E 's/^[^(]+\(([[:digit:]]*)\):$/\1/')

      cat <<EOF
      event_type: $_event_type
      device_id: $_device_id
      device_type: $_device_type
      device_name: $_device_name
      EOF

      case "$_event_type" in
        XIDeviceEnabled|XIDeviceDisabled)
          case "$_device_type" in
            XISlaveKeyboard)
              if [ -f "$HOME/.cache/inputplug/$_device_id" ] ; then
                _device_name="$(cat "$HOME/.cache/inputplug/$_device_id")"
                rm "$HOME/.cache/inputplug/$_device_id"
              fi
              case "$_device_name" in
                "YMDK Split75")
                  if [ "$_event_type" = "XIDeviceDisabled" ] ; then
                     xinput set-int-prop $_keyboard_id $_property_id 8 1
                  elif [ "$_event_type" = "XIDeviceEnabled" ] ; then
                     echo "$_device_name" >> "$HOME/.cache/inputplug/$_device_id"
                     xinput set-int-prop $_keyboard_id $_property_id 8 0
                  fi
                  ;;
                *)
                  ;;
              esac
              ;;
            *)
              ;;
          esac
          ;;
        *)
          ;;
      esac
    '';
  in {
    systemd.user.services."inputplug" = {
      Unit = {
        After = ["graphical-session-pre.target"];
        PartOf = ["graphical-session.target"];
      };

      Service = {
        Type = "simple";
        ExecStart = ''${lib.getExe pkgs.bash} -l -c "${lib.getExe pkgs.inputplug} -d -c ${script}"'';
      };

      Install = {WantedBy = ["graphical-session.target"];};
    };
  };
}