boreal: setup sddm theme module

boreal.nix

@@ -1,11 +1,13 @@
 { ... }:
-
 {
   imports = [
     # Default configuration
     ./base
     ./base/gui-programs.nix
 
+    # Module definitions
+    ./modules
+
     # Service definitions
     ./services
 

flake.nix

@@ -74,6 +74,10 @@
             nixpkgs.overlays = [
               emacs-overlay.overlay
 
+              (self: super: {
+                packages = import ./pkgs { pkgs = super; };
+              })
+
               # uncomment this to build everything from scratch, fun but takes a
               # while
               #

hosts/boreal/default.nix

@@ -67,12 +67,13 @@ in
     xserver = {
       enable = true;
       videoDrivers = [ "nvidia" ];
-      displayManager.sddm.enable = true;
       windowManager.i3.enable = true;
       layout = "fr";
       xkbVariant = "us";
     };
   };
+  my.displayManager.sddm.enable = true;
+
 
   sound.enable = true;
   hardware.pulseaudio = {

modules/default.nix

@@ -0,0 +1,6 @@
+{ ... }:
+{
+  imports = [
+    ./sddm.nix
+  ];
+}

modules/sddm.nix

@@ -0,0 +1,23 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = config.my.displayManager.sddm;
+in
+{
+  options.my.displayManager.sddm.enable = lib.mkEnableOption "SDDM setup";
+
+  config = lib.mkIf cfg.enable {
+    services.xserver.displayManager.sddm = {
+      enable = true;
+      theme = "sugar-candy";
+    };
+
+    environment.systemPackages = with pkgs; [
+      packages.sddm-sugar-candy
+
+      # dependencies for sugar-candy theme
+      libsForQt5.qt5.qtgraphicaleffects
+      libsForQt5.qt5.qtquickcontrols2
+      libsForQt5.qt5.qtsvg
+    ];
+  };
+}

pkgs/default.nix

@@ -0,0 +1,4 @@
+{ pkgs }:
+{
+  sddm-sugar-candy = pkgs.callPackage ./sddm-sugar-candy.nix {};
+}

pkgs/sddm-sugar-candy.nix

@@ -0,0 +1,18 @@
+{ stdenv, fetchFromGitLab }:
+stdenv.mkDerivation rec {
+  pname = "sddm-sugar-candy";
+  # latest master commit, no recent tags :(
+  version = "2b72ef6c6f720fe0ffde5ea5c7c48152e02f6c4f";
+  dontBuild = true;
+  installPhase = ''
+      mkdir -p $out/share/sddm/themes
+      cp -aR $src $out/share/sddm/themes/sugar-candy
+    '';
+  src = fetchFromGitLab {
+    domain = "framagit.org";
+    owner = "MarianArlt";
+    repo = "sddm-sugar-candy";
+    rev = version;
+    sha256 = "sha256-XggFVsEXLYklrfy1ElkIp9fkTw4wvXbyVkaVCZq4ZLU=";
+  };
+}