nixos-config/nixos/components/gui/xorg/default.nix

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

  imports = [ ./xlock.nix ];

  options.components.gui.xorg.enable = mkOption {
    type = lib.types.bool;
    default = config.components.gui.enable;
  };

  config = mkIf config.components.gui.xorg.enable {

    # system.custom.fonts.enable = true;
    services.displayManager = {
      defaultSession = lib.mkDefault "none+i3";
      autoLogin.enable = lib.mkDefault true;
      autoLogin.user = config.users.users.mainUser.name;
    };

    services.xserver = {

      enable = true;

      displayManager = {
        lightdm.enable = lib.mkDefault true;
      };

      desktopManager.xterm.enable = false;
      windowManager.i3.enable = true;

      # mouse/touchpad
      # --------------

    };

    services.libinput = {
      enable = true;
      touchpad = {
        disableWhileTyping = true;
        tapping = true;
        scrollMethod = "twofinger";
        accelSpeed = "1.3";
        naturalScrolling = true;
        horizontalScrolling = true;
      };
    };

    # Packages
    # --------
    environment.systemPackages = with pkgs; [

      xclip
      xtrlock-pam
      xorg.xev

      dmenu
      arandr
      xcalib
      flameshot
      feh

    ];

    # Xresources config
    # -----------------
    # spread the Xresource config
    # across different files
    # just add a file into `/etc/X11/Xresource.d/` and it will be
    # evaluated.
    services.xserver.displayManager.sessionCommands = ''
      for file in `ls /etc/X11/Xresource.d/`
      do
        ${pkgs.xorg.xrdb}/bin/xrdb -merge /etc/X11/Xresource.d/$file
      done
    '';
    environment.etc."/X11/Xresource.d/.keep".text = "";

  };
}