roles/kde/sddm.nix

@@ -1,6 +1,8 @@
 { config, pkgs, ... }:
 
 let
+	currentTheme = config.services.xserver.displayManager.sddm.theme;
+
 	sddm-sugar-candy = pkgs.stdenv.mkDerivation {
 		pname = "sddm-sugar-candy";
 		version = "master";
@@ -18,6 +20,25 @@ let
 		'';
 	};
 
+	/*
+	Adds a theme.conf.user file to the current sddm theme's folder,
+	allowing you to change it's configuration without needing to
+	repackage it
+	*/
+	customcfg = pkgs.stdenv.mkDerivation {
+		name = "sddm-theme-customizer";
+		dontUnpack = true;
+		# TODO: generate theme.conf.user outside of installPhase
+		installPhase = ''
+			runHook preInstall
+
+			mkdir -p $out/share/sddm/themes/${currentTheme}/
+			echo "[General]
+			background = ${pkgs.plasma-workspace-wallpapers}/share/wallpapers/MilkyWay/contents/images/5120x2880.png" >> $out/share/sddm/themes/${currentTheme}/theme.conf.user
+
+			runHook postInstall
+		'';
+	};
 in
 
 {
@@ -30,7 +51,7 @@ in
 		};
 	};
 
-	environment.systemPackages = [ sddm-sugar-candy ];
+	environment.systemPackages = [ sddm-sugar-candy customcfg ];
 	/*
 	Sddm has a very annoying bug where it sometimes hangs at shutdown
 	if you use Plasma's wayland session. The bug is already fixed upstream,