add homeManagerModules

all-modules.nix

@@ -6,6 +6,7 @@
     ./modules/devShells.nix
     ./modules/flake.nix
     ./modules/formatter.nix
+    ./modules/homeManagerModules.nix
     ./modules/legacyPackages.nix
     ./modules/moduleWithSystem.nix
     ./modules/nixosConfigurations.nix

modules/homeManagerModules.nix

@@ -0,0 +1,27 @@
+{ self, lib, flake-parts-lib, moduleLocation, ... }:
+let
+  inherit (lib)
+    mapAttrs
+    mkOption
+    types
+    ;
+  inherit (flake-parts-lib)
+    mkSubmoduleOptions
+    ;
+in
+{
+  options = {
+    flake = mkSubmoduleOptions {
+      nixosModules = mkOption {
+        type = types.lazyAttrsOf types.unspecified;
+        default = { };
+        apply = mapAttrs (k: v: { _file = "${toString moduleLocation}#nixosModules.${k}"; imports = [ v ]; });
+        description = ''
+          home-manager modules.
+
+          You may use this for reusable pieces of configuration, service modules, etc for [home-manager](https://github.com/nix-community/home-manager).
+        '';
+      };
+    };
+  };
+}