nixos-config/lib/update-system.nix

{
  pkgs,
  nixos-rebuild,
}: let
  configPath = "/etc/nixos";
in {
  update-system = pkgs.writeHaskellScript
  {
    name = "update-system";
    bins = [nixos-rebuild pkgs.nix-output-monitor pkgs.nvd];
  } ''
    main = do
        paths <- myNixPath "${configPath}"
        args <- getArgs
        setEnv "WITH_SECRETS" "false"
        nom_build (paths ++ buildSystemParams ++ ["--no-out-link"] ++ remoteBuildParams ++ fmap toString args)
        setEnv "WITH_SECRETS" "true"
        oldSystem <- readlink "-f" "/run/current-system" |> captureTrim
        nixos_rebuild (paths ++ ["switch"] ++ fmap toString args) &!> StdOut |> nom
        newSystem <- readlink "-f" "/run/current-system" |> captureTrim
        nvd "diff" oldSystem newSystem
  '';
}