WIP

modules/machine.nix

@@ -0,0 +1,73 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  inherit (lib)
+    mkAliasOptionModule
+    mkOption
+    types
+    ;
+in
+{
+  options.machine = {
+    mainUser = mkOption {
+      type = types.str;
+      description = "The main user of the machine";
+    };
+
+    hostName = mkOption {
+      type = types.str;
+      description = "The name of the machine";
+    };
+
+    filesystem.uuid = {
+      boot = mkOption {
+        type = types.nullOr types.str;
+        description = "The UUID of the XBOOTLDR partition.";
+        default = null;
+      };
+
+      esp = mkOption {
+        type = types.nullOr types.str;
+        description = "The UUID of the ESP.";
+        default = null;
+      };
+
+      luks = mkOption {
+        type = types.nullOr types.str;
+        description = "The UUID of the encrypted root partition.";
+        default = null;
+      };
+
+      cryptroot = mkOption {
+        type = types.nullOr types.str;
+        description = "The UUID of the decrypted root partition.";
+        default = null;
+      };
+    };
+  };
+
+  config = lib.mkIf pkgs.stdenv.hostPlatform.isLinux {
+    assertions = [
+      {
+        assertion = config.machine.filesystem.uuid.boot != null;
+        message = "machine.filesystem.uuid.boot must be set on Linux systems";
+      }
+      {
+        assertion = config.machine.filesystem.uuid.esp != null;
+        message = "machine.filesystem.uuid.esp must be set on Linux systems";
+      }
+      {
+        assertion = config.machine.filesystem.uuid.luks != null;
+        message = "machine.filesystem.uuid.luks must be set on Linux systems";
+      }
+      {
+        assertion = config.machine.filesystem.uuid.cryptroot != null;
+        message = "machine.filesystem.cryptroot.esp must be set on Linux systems";
+      }
+    ];
+  };
+}