From c1dbb90bfdc3b13aa5976973a621fc104a0e55fb Mon Sep 17 00:00:00 2001
From: Alyssa Ross <hi@alyssa.is>
Date: Tue, 2 Oct 2018 00:35:32 +0200
Subject: [PATCH] lightdm: add extraConfig option (#47630)

---
 .../modules/services/x11/display-managers/lightdm.nix  | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/nixos/modules/services/x11/display-managers/lightdm.nix b/nixos/modules/services/x11/display-managers/lightdm.nix
index 8078b93a7574..a34f2370649f 100644
--- a/nixos/modules/services/x11/display-managers/lightdm.nix
+++ b/nixos/modules/services/x11/display-managers/lightdm.nix
@@ -46,6 +46,7 @@ let
         greeters-directory = ${cfg.greeter.package}
       ''}
       sessions-directory = ${dmcfg.session.desktops}/share/xsessions
+      ${cfg.extraConfig}
 
       [Seat:*]
       xserver-command = ${xserverWrapper}
@@ -113,6 +114,15 @@ in
         };
       };
 
+      extraConfig = mkOption {
+        type = types.lines;
+        default = "";
+        example = ''
+          user-authority-in-system-dir = true
+        '';
+        description = "Extra lines to append to LightDM section.";
+      };
+
       background = mkOption {
         type = types.str;
         default = "${pkgs.nixos-artwork.wallpapers.simple-dark-gray-bottom}/share/artwork/gnome/nix-wallpaper-simple-dark-gray_bottom.png";