{ config, pkgs, lib, ... }:
with builtins // lib;
let
  cfg = config.build;
in {
  options.build = {
    firmware = {
      checkDevice = mkOption {
        internal = true;
        readOnly = true;
        type = types.package;
        default = pkgs.writeShellApplication {
          name = "check-firmware";
          runtimeInputs = with pkgs; [
            kobo-utils
          ];
          text = ''
            echo "hi"
          '';
        };
      };

      bundle =
      let
        b = pkgs.runCommandLocal "package-firmware" {} ''
          cp -r "${config.firmware.package.out}" $out
          tar czvf $out/KoboRoot.tgz --directory="${config.firmware.package.KoboRoot}"
        '';
      in pkgs.runCommandLocal "bundle-firmware" {} ''
        tar czvf $out --directory "${b}"
      '';


      deploy = pkgs.writeShellApplication {
        name = "deploy-firmware";
        runtimeInputs = with pkgs; [
          gnutar
          kobo-utils
        ];
        text = ''
          echo "Looking for kobo"
          KOBOPATH="$(kobo-find -f -w)"

          if [ -z "$KOBOPATH" ]; then
            >&2 echo "Cannot locate kobo device"
            exit 1
          fi

          echo "Found kobo device at $KOBOPATH"

          echo "Placing firmware on device"

          tar xzvf "${cfg.fimware.bundle}" --directory="$KOBOPATH/.kobo/"

          echo "Successfully installed kobo firmware. Please eject your device so it can install."
        '';
      };
    };
  };
}