Enable all options to be auto-loaded from nixDir

This removes the manual configuration of which options are auto-loaded.
Now all options are eligible except for "nixDir" and "_module" as those
would cause inf recursions.

Additionally, instead of setting name aliases in the nixDir module, a
config option is added, enabling other modules to extend the aliases
lists.

builtinModules/homeConfigurations.nix

@@ -38,12 +38,15 @@ in
     default = { };
   };
 
-  config.outputs = mkIf (config.homeConfigurations != { }) {
-    homeConfigurations = configs;
-    checks = foldl recursiveUpdate { } (mapAttrsToList
-      (n: v: {
-        ${v.config.nixpkgs.system}."home-${n}" = v.activationPackage;
-      })
-      configs);
+  config = {
+    outputs = mkIf (config.homeConfigurations != { }) {
+      homeConfigurations = configs;
+      checks = foldl recursiveUpdate { } (mapAttrsToList
+        (n: v: {
+          ${v.config.nixpkgs.system}."home-${n}" = v.activationPackage;
+        })
+        configs);
+    };
+    nixDirAliases.homeConfigurations = [ "home" ];
   };
 }

builtinModules/nixDir.nix

@@ -2,76 +2,35 @@
 # Copyright (C) 2023 Archit Gupta <archit@accelbread.com>
 # SPDX-License-Identifier: MIT
 
-{ config, src, lib, flakelight, moduleArgs, ... }:
+{ config, options, src, lib, flakelight, ... }:
 let
-  inherit (lib) mkOption mkIf mkMerge;
-  inherit (flakelight) autoImport autoImportArgs;
+  inherit (builtins) attrNames;
+  inherit (lib) genAttrs mkIf mkOption subtractLists;
+  inherit (lib.types) attrsOf listOf str;
+  inherit (flakelight) autoImport;
   inherit (flakelight.types) path;
-
-  autoImport' = autoImport config.nixDir;
-  autoImportArgs' = autoImportArgs config.nixDir moduleArgs;
 in
 {
-  options.nixDir = mkOption {
-    type = path;
-    default = src + /nix;
+  options = {
+    nixDir = mkOption {
+      type = path;
+      default = src + /nix;
+    };
+
+    nixDirAliases = mkOption {
+      type = attrsOf (listOf str);
+      default = { };
+    };
   };
 
-  config =
-    let
-      outputs = autoImport' "outputs";
-      perSystem = autoImport' "perSystem";
-      withOverlays = autoImport' "withOverlays";
-      package = autoImport' "package";
-      packages = autoImport' "packages";
-      overlays = autoImport' "overlays";
-      devShell = autoImport' "devShell";
-      devShells = autoImport' "devShells";
-      app = autoImport' "app";
-      apps = autoImport' "apps";
-      checks = autoImport' "checks";
-      template = autoImport' "template";
-      templates = autoImport' "templates";
-      formatters = autoImport' "formatters";
-      bundler = autoImport' "bundler";
-      bundlers = autoImport' "bundlers";
-      nixosModule = autoImport' "nixosModule";
-      nixosModules = autoImport' "nixosModules";
-      nixosConfigurations = autoImport' [ "nixosConfigurations" "nixos" ];
-      homeModule = autoImport' "homeModule";
-      homeModules = autoImport' "homeModules";
-      homeConfigurations = autoImport' [ "homeConfigurations" "home" ];
-      flakelightModule = autoImport' "flakelightModule";
-      flakelightModules = autoImport' "flakelightModules";
-      lib = autoImport' "lib";
-      functor = autoImport' "functor";
-    in
-    mkMerge [
-      (mkIf (outputs != null) { inherit outputs; })
-      (mkIf (perSystem != null) { inherit perSystem; })
-      (mkIf (withOverlays != null) { inherit withOverlays; })
-      (mkIf (package != null) { inherit package; })
-      (mkIf (packages != null) { inherit packages; })
-      (mkIf (overlays != null) { inherit overlays; })
-      (mkIf (devShell != null) { inherit devShell; })
-      (mkIf (devShells != null) { inherit devShells; })
-      (mkIf (app != null) { inherit app; })
-      (mkIf (apps != null) { inherit apps; })
-      (mkIf (checks != null) { inherit checks; })
-      (mkIf (template != null) { inherit template; })
-      (mkIf (templates != null) { inherit templates; })
-      (mkIf (formatters != null) { inherit formatters; })
-      (mkIf (bundler != null) { inherit bundler; })
-      (mkIf (bundlers != null) { inherit bundlers; })
-      (mkIf (nixosModule != null) { inherit nixosModule; })
-      (mkIf (nixosModules != null) { inherit nixosModules; })
-      (mkIf (nixosConfigurations != null) { inherit nixosConfigurations; })
-      (mkIf (homeModule != null) { inherit homeModule; })
-      (mkIf (homeModules != null) { inherit homeModules; })
-      (mkIf (homeConfigurations != null) { inherit homeConfigurations; })
-      (mkIf (flakelightModule != null) { inherit flakelightModule; })
-      (mkIf (flakelightModules != null) { inherit flakelightModules; })
-      (mkIf (lib != null) { inherit lib; })
-      (mkIf (functor != null) { inherit functor; })
-    ];
+  config = genAttrs (subtractLists [ "_module" "nixDir" ] (attrNames options))
+    (name:
+      let
+        internal = options.${name}.internal or false;
+        val = autoImport config.nixDir
+          (if name == "nixDirAliases" then name else
+          ([ name ] ++ config.nixDirAliases.${name} or [ ]));
+        cond = !internal && (val != null);
+      in
+      mkIf cond (if cond then val else { }));
 }

builtinModules/nixosConfigurations.nix

@@ -32,16 +32,19 @@ in
     default = { };
   };
 
-  config.outputs = mkIf (config.nixosConfigurations != { }) {
-    nixosConfigurations = configs;
-    checks = foldl recursiveUpdate { } (mapAttrsToList
-      (n: v: {
-        # Wrapping the drv is needed as computing its name is expensive
-        # If not wrapped, it slows down `nix flake show` significantly
-        ${v.config.nixpkgs.system}."nixos-${n}" = v.pkgs.runCommand
-          "check-nixos-${n}"
-          { } "echo ${v.config.system.build.toplevel} > $out";
-      })
-      configs);
+  config = {
+    outputs = mkIf (config.nixosConfigurations != { }) {
+      nixosConfigurations = configs;
+      checks = foldl recursiveUpdate { } (mapAttrsToList
+        (n: v: {
+          # Wrapping the drv is needed as computing its name is expensive
+          # If not wrapped, it slows down `nix flake show` significantly
+          ${v.config.nixpkgs.system}."nixos-${n}" = v.pkgs.runCommand
+            "check-nixos-${n}"
+            { } "echo ${v.config.system.build.toplevel} > $out";
+        })
+        configs);
+    };
+    nixDirAliases.nixosConfigurations = [ "nixos" ];
   };
 }

builtinModules/propagationModule.nix

@@ -12,7 +12,7 @@ let
   inherit (flakelight.types) module;
 in
 {
-  options.propagationModule = mkOption { type = module; };
+  options.propagationModule = mkOption { type = module; internal = true; };
 
   config.propagationModule =
     { lib, pkgs, options, ... }: