nixpkgs/nixos/modules/services/x11/display-managers/sx.nix

{
  config,
  lib,
  pkgs,
  ...
}:

let
  cfg = config.services.xserver.displayManager.sx;

in
{
  options = {
    services.xserver.displayManager.sx = {
      enable = lib.mkEnableOption "" // {
        description = ''
          Whether to enable the "sx" pseudo-display manager, which allows users
          to start manually via the "sx" command from a vt shell. The X server
          runs under the user's id, not as root. The user must provide a
          ~/.config/sx/sxrc file containing session startup commands, see
          sx(1). This is not automatically generated from the desktopManager
          and windowManager settings. sx doesn't have a way to directly set
          X server flags, but it can be done by overriding its xorgserver
          dependency.
        '';
      };

      addAsSession = lib.mkEnableOption "" // {
        description = ''
          Whether to add sx as a display manager session. Keep in mind that sx
          expects to be run from a TTY, so it may not work in your display
          manager.
        '';
      };

      package = lib.mkPackageOption pkgs "sx" { };
    };
  };

  config = lib.mkIf cfg.enable {
    environment.systemPackages = [ cfg.package ];

    services = {
      displayManager.sessionPackages = lib.optionals cfg.addAsSession [ cfg.package ];

      xserver = {
        exportConfiguration = true;
        logFile = lib.mkDefault null;
      };
    };
  };

  meta.maintainers = with lib.maintainers; [
    figsoda
    thiagokokada
  ];
}