sys/boot/chain.nix


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{
  config,
  lib,
  pkgs,
  ...
}:
with lib; let
  cfg = config.local.boot;
in {
  options.local.boot = {
    loader = mkOption {
      type = types.enum ["none" "out-of-band" "grub" "systemd-boot"];
    };

    kernel = mkOption {
      type = types.raw;
    };
  };

  config = mkIf (cfg.loader != "none") {
    boot = {
      kernelPackages = cfg.kernel;

      loader =
        if cfg.loader == "none" || cfg.loader == "out-of-band"
        then {
          grub.enable = false;
        }
        else if cfg.loader == "grub"
        then {
          grub = {
            enable = true;
            device = "nodev";
            efiSupport = true;
          };
        }
        else if cfg.loader == "systemd-boot"
        then {
          systemd-boot = {
            enable = true;
            editor = true;
          };
        }
        else throw "unexpected config.local.boot.loader setting: ${cfg.loader}";
    };
  };
}