restructure: home-manager config

modules/home-manager/default.nix

@@ -1,3 +1,4 @@
 {
   fonts = import ./fonts.nix;
+  monitors = import ./monitors.nix;
 }

modules/home-manager/monitors.nix

@@ -0,0 +1,62 @@
+{ lib, config, ... }:
+
+let
+  inherit (lib) mkOption types;
+  cfg = config.monitors;
+in
+{
+  options.monitors = mkOption {
+    type = types.listOf (types.submodule {
+      options = {
+        name = mkOption {
+          type = types.str;
+          example = "DP-1";
+        };
+        primary = mkOption {
+          type = types.bool;
+          default = false;
+        };
+        width = mkOption {
+          type = types.int;
+          example = 1920;
+        };
+        height = mkOption {
+          type = types.int;
+          example = 1080;
+        };
+        refreshRate = mkOption {
+          type = types.int;
+          default = 60;
+        };
+        x = mkOption {
+          type = types.int;
+          default = 0;
+        };
+        y = mkOption {
+          type = types.int;
+          default = 0;
+        };
+        transform = mkOption {
+          type = types.int;
+          default = 0;
+        };
+        enabled = mkOption {
+          type = types.bool;
+          default = true;
+        };
+        workspace = mkOption {
+          type = types.nullOr types.str;
+          default = null;
+        };
+      };
+    });
+    default = [ ];
+  };
+  config = {
+    assertions = [{
+      assertion = ((lib.length config.monitors) != 0) ->
+        ((lib.length (lib.filter (m: m.primary) config.monitors)) == 1);
+      message = "Exactly one monitor must be set to primary.";
+    }];
+  };
+}