Add polymouth

system/boot/default.nix

@@ -4,5 +4,6 @@ _: {
     ./generic.nix
     ./secure-boot.nix
     ./initrd.nix
+    ./plymouth.nix
   ];
 }

system/boot/plymouth.nix

@@ -0,0 +1,28 @@
+{ config, lib, pkgs, ...}: let
+  inherit (lib) mkIf;
+  cfg = config.myOptions.system.boot.plymouth;
+in {
+  config = mkIf cfg.enable {
+    boot.plymouth = {
+      enable = true;
+      theme = cfg.selectedTheme;
+    }
+    // lib.optionalAttrs cfg.withThemes {
+      themePackages = [
+        (pkgs.adi1090x-plymouth-themes.override {
+          selected_themes = [ cfg.selectedTheme ];
+        })
+      ];
+    };
+
+    # Make polymouth work with sleep
+    powerManagement = {
+      powerDownCommands = ''
+        ${pkgs.plymouth} --show-splash
+      '';
+      resumeCommands = ''
+        ${pkgs.plymouth} --quit
+      '';
+    };
+  };
+}