rose-pine-nix/modules/nixos/sddm.nix

{
  lib,
  config,
  ...
}: let
  inherit (config.rose-pine) sources;
  cfg = config.services.displayManager.sddm.rose-pine;
  enable = cfg.enable && config.services.displayManager.sddm.enable;
in {
  options.services.displayManager.sddm.rose-pine = lib.rp.mkRosePineOpt {name = "sddm";};

  config = lib.mkIf enable {
    services.displayManager.sddm.theme = "rose-pine";

    environment.systemPackages = [
      (
        {
          stdenvNoCC,
          libsForQt5,
        }:
          stdenvNoCC.mkDerivation {
            pname = "sddm-rose-pine-theme";
            version = "1.2";
            dontBuild = true;

            propagatedUserEnvPkgs = [
              libsForQt5.qt5.qtgraphicaleffects
            ];

            src = sources.sddm;

            installPhase = ''
              mkdir -p $out/share/sddm/themes
              cp -aR $src $out/share/sddm/themes/rose-pine
            '';
          }
      )
    ];
  };
}