expose 'doc-modules' package that generates module documentation

flake.nix

@@ -40,10 +40,23 @@
         inputs.pre-commit-hooks.flakeModule
       ];
       systems = [ "x86_64-linux" "aarch64-darwin" "x86_64-darwin" "aarch64-linux" ];
-      perSystem = { config, self', inputs', pkgs, lib, system, ... }:
+      perSystem = { options, config, self', inputs', pkgs, lib, system, ... }:
         let
           pkgs = import inputs.nixpkgs { inherit system; };
           utils = import ./nix/utils.nix { inherit pkgs lib; };
+          doc-modules = (inputs.flake-parts.lib.evalFlakeModule
+            {
+              inherit inputs;
+            }
+            {
+              imports = [
+                ./nix/onchain.nix
+                ./nix/run.nix
+                ./nix/offchain.nix
+                # FIXME: This module doesn't seem to work yet.
+                # ./nix/ci-config.nix 
+              ];
+            });
         in
         {
           pre-commit = {
@@ -62,13 +75,15 @@
             shellHook = config.pre-commit.installationScript;
           };
           formatter = pkgs.nixpkgs-fmt;
+          packages.options-doc = (pkgs.nixosOptionsDoc { inherit (doc-modules) options; }).optionsCommonMark;
 
           # This check is for `liqwid-nix` itself.
           checks.nixFormat =
             utils.shellCheck "nixFormat" ./. { nativeBuildInputs = [ pkgs.nixpkgs-fmt ]; } ''
               find -name '*.nix' -not -path './dist*/*' -not -path './haddock/*' | xargs nixpkgs-fmt
             '';
         };
+
       herculesCI = {
         ciSystems = [ "x86_64-linux" ];
         onPush.default.outputs = self.checks.x86_64-linux;

nix/offchain.nix

@@ -348,14 +348,8 @@ in
                 default = false;
               };
 
-              nodejsPackage = lib.mkOption {
-                description = ''
-                  The nodejs package to use.
-
-                  Added in: 2.1.1.
-                '';
-                type = types.package;
-                default = pkgs.nodejs-14_x;
+              nodejsPackage = lib.mkPackageOption pkgs "nodejs" {
+                default = [ "nodejs-14_x" ];
               };
             };
           };