nixos-config/modules/gnome.nix

{ config, pkgs, lib, ... }:
let
  cfg = config.sconfig.gnome;
in
{
  options.sconfig.gnome = lib.mkEnableOption "Enable Gnome Desktop";

  config = lib.mkIf cfg {

    services.xserver = {
      enable = true;
      libinput.enable = true;
      displayManager.gdm.enable = true;
      displayManager.gdm.autoSuspend = false;
      desktopManager.gnome.enable = true;
      displayManager.defaultSession = "gnome-xorg";
    };

    services.colord.enable = false;

    environment.systemPackages = with pkgs; [
      gnome3.gnome-tweaks
      gnomeExtensions.appindicator
      gnomeExtensions.dash-to-dock
      gnomeExtensions.dash-to-panel
      gnomeExtensions.sound-output-device-chooser
      numix-icon-theme

      (runCommand "x-terminal-emulator" { } ''
        mkdir -p $out/bin
        ln -s ${gnome.gnome-terminal}/bin/gnome-terminal $out/bin/x-terminal-emulator
      '')

      (writeShellScriptBin "red" ''
        x="$(gsettings get org.gnome.settings-daemon.plugins.color night-light-enabled)"
        [ "$x" = "true" ] && x=false || x=true
        echo "Nightlight: $x"
        gsettings set org.gnome.settings-daemon.plugins.color night-light-enabled $x
      '')

      (writeShellScriptBin "gnome-my-settings" ''
        gsettings set org.gnome.desktop.interface enable-hot-corners false
        gsettings set org.gnome.desktop.interface show-battery-percentage true
        gsettings set org.gnome.desktop.media-handling automount false
        gsettings set org.gnome.desktop.media-handling autorun-never true
        gsettings set org.gnome.desktop.notifications show-in-lock-screen false
        gsettings set org.gnome.desktop.privacy recent-files-max-age 30
        gsettings set org.gnome.desktop.privacy remove-old-temp-files true
        gsettings set org.gnome.desktop.privacy remove-old-trash-files true
        gsettings set org.gnome.desktop.privacy report-technical-problems false
        gsettings set org.gnome.desktop.privacy send-software-usage-stats false
        gsettings set org.gnome.desktop.screensaver lock-enabled false
        gsettings set org.gnome.desktop.search-providers disabled "['org.gnome.Epiphany.desktop']"
        gsettings set org.gnome.desktop.wm.keybindings maximize-vertically "['<Super>w']"
        gsettings set org.gnome.desktop.wm.keybindings switch-applications "['<Super>Tab']"
        gsettings set org.gnome.desktop.wm.keybindings switch-applications-backward "['<Shift><Super>Tab']"
        gsettings set org.gnome.desktop.wm.keybindings switch-windows "['<Alt>Tab']"
        gsettings set org.gnome.desktop.wm.keybindings switch-windows-backward "['<Shift><Alt>Tab']"
        gsettings set org.gnome.desktop.wm.keybindings toggle-fullscreen "['<Super>f']"
        gsettings set org.gnome.desktop.wm.preferences resize-with-right-button true
        gsettings set org.gnome.settings-daemon.plugins.media-keys logout '[]'
        gsettings set org.gnome.settings-daemon.plugins.media-keys volume-step 2
        gsettings set org.gnome.settings-daemon.plugins.power power-button-action 'interactive'
        gsettings set org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'nothing'

        mkdir -p ~/.config/gtk-3.0
        echo 'window.ssd headerbar.titlebar { padding-top: 1px; padding-bottom: 1px; }' > ~/.config/gtk-3.0/gtk.css

        gsettings set org.gnome.desktop.interface icon-theme 'Numix'; sleep 1
        gsettings set org.gnome.desktop.interface gtk-theme 'Adwaita-dark'
      '')
    ];

  };
}