wip: migrate client modules

modules-clone/nixos/optional/hibernation.nix

@@ -0,0 +1,30 @@
+{ lib, config, ... }:
+{
+  options.swarselsystems = {
+    hibernation = {
+      offset = lib.mkOption {
+        type = lib.types.int;
+        default = 0;
+      };
+      resumeDevice = lib.mkOption {
+        type = lib.types.str;
+        default = "/dev/disk/by-label/nixos";
+      };
+    };
+  };
+  config = {
+    boot = {
+      kernelParams = [
+        "resume_offset=${builtins.toString config.swarselsystems.hibernation.offset}"
+        # "mem_sleep_default=deep"
+      ];
+      inherit (config.swarselsystems.hibernation) resumeDevice;
+    };
+    systemd.services."systemd-suspend-then-hibernate".aliases = [ "systemd-suspend.service" ];
+    powerManagement.enable = true;
+    systemd.sleep.settings.Sleep = {
+      HibernateDelaySec = "120m";
+      SuspendState = "freeze";
+    };
+  };
+}