Group shared system settings

system/shared/boot/plymouth.nix

@@ -0,0 +1,32 @@
+{ 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 ];
+          })
+        ];
+      };
+
+      kernelParams = ["splash"];
+    };
+
+    # Make polymouth work with sleep
+    powerManagement = {
+      powerDownCommands = ''
+        ${pkgs.plymouth} --show-splash
+      '';
+      resumeCommands = ''
+        ${pkgs.plymouth} --quit
+      '';
+    };
+  };
+}