nixpkgs/nixos/modules/system/boot/loader/efi.nix

{ pkgs, ... }:

with pkgs.lib;

{
  options.boot.loader.efi = {
    canTouchEfiVariables = mkOption {
      default = false;

      type = types.bool;

      description = "Whether or not the installation process should modify efi boot variables.";
    };

    efibootmgr = {
      efiDisk = mkOption {
        default = "/dev/sda";

        type = types.string;

        description = "The disk that contains the EFI system partition.";
      };

      efiPartition = mkOption {
        default = "1";
        description = "The partition number of the EFI system partition.";
      };

      postEfiBootMgrCommands = mkOption {
        default = "";
        type = types.string;
        description = ''
          Shell commands to be executed immediately after efibootmgr has setup the system EFI.
          Some systems do not follow the EFI specifications properly and insert extra entries.
          Others will brick (fix by removing battery) on boot when it finds more than X entries.
          This hook allows for running a few extra efibootmgr commands to combat these issues.
        '';
      };
    };

    efiSysMountPoint = mkOption {
      default = "/boot";

      type = types.string;

      description = "Where the EFI System Partition is mounted.";
    };
  };
}