refactor: simplify buildClan remove any filtering

lib/modules/default.nix

@@ -6,7 +6,8 @@
   clanLib,
   ...
 }:
-{
+rec {
+  # TODO: rename to clanModule
   flakePartsModule = {
     _module.args = {
       inherit clanLib;
@@ -34,53 +35,35 @@
     Public attributes of buildClan. As specified in publicAttrs.
   */
   buildClanWith =
-
     {
       clan-core,
       # TODO: Below should be module options such that the user can override them?
       nixpkgs,
-      publicAttrs ? import ./public.nix,
       nix-darwin ? null,
     }:
     {
       ## Inputs
       self ? lib.warn "Argument: 'self' must be set when using 'buildClan'." null, # Reference to the current flake
-      # allows to include machine-specific modules i.e. machines.${name} = { ... }
-      # A map from arch to pkgs, if specified this nixpkgs will be only imported once for each system.
-      # This improves performance, but all nipxkgs.* options will be ignored.
-      # deadnix: skip
-      inventory ? { },
-      ## Special inputs (not passed to the module system as config)
       specialArgs ? { }, # Extra arguments to pass to nixosSystem i.e. useful to make self available
-      ##
       ...
-    }@attrs:
+    }@m:
     let
-      eval = import ./function-adapter.nix {
+      result = lib.evalModules {
-        inherit
+        specialArgs = {
-          lib
+          inherit (clan-core) clanLib;
-          nixpkgs
+          inherit
-          nix-darwin
+            self
-          clan-core
+            clan-core
-          self
+            nixpkgs
-          ;
+            nix-darwin
-        inherit specialArgs;
+            ;
-      };
+        };
-      rest = builtins.removeAttrs attrs [ "specialArgs" ];
+        modules = [
-      result = eval {
+          # buildClan arguments are equivalent to specifying a module
-        imports = [
+          m
-          rest
+          flakePartsModule
-          # implementation
-          ./clan/module.nix
         ];
       };
     in
-    {
+    result.config;
-      clan = lib.genAttrs publicAttrs.clan (
-        name:
-        result.clanInternals.${name}
-          or (throw "Output: clanInternals.${name} not found. Check: ${result.file}")
-      );
-    }
-    // lib.filterAttrs (name: _v: builtins.elem name publicAttrs.topLevel) result;
 }

lib/modules/function-adapter.nix

@@ -1,28 +0,0 @@
-{
-  lib,
-  nixpkgs,
-  nix-darwin ? null,
-  clan-core,
-  self,
-  specialArgs ? { },
-}:
-# Returns a function that takes self, which should point to the directory of the flake
-module:
-(lib.evalModules {
-  specialArgs = {
-    inherit (clan-core) clanLib;
-    inherit
-      self
-      clan-core
-      nixpkgs
-      nix-darwin
-      ;
-  };
-  modules = [
-    ./clan/default.nix
-    module
-    {
-      inherit specialArgs;
-    }
-  ];
-}).config

lib/modules/tests.nix

@@ -1,58 +1,49 @@
 {
   lib,
-  nixpkgs,
   clan-core,
-  buildClan,
   ...
 }:
 let
-  evalClan = import ./function-adapter.nix {
-    inherit lib nixpkgs clan-core;
-    self = ./.;
-  };
-
   # Shallowly force all attribute values to be evaluated.
   shallowForceAllAttributes = lib.foldlAttrs (
     _acc: _name: value:
     lib.seq value true
   ) true;
+  inherit (clan-core.clanLib) buildClan;
 in
 #######
 {
   test_missing_self =
     let
-      config = buildClan {
+      clan = buildClan {
         meta.name = "test";
-        imports = [ ./clan/module.nix ];
+        directory = ./.;
       };
     in
     {
-      expr = shallowForceAllAttributes config;
+      inherit clan;
-      expectedError = {
+      expr = shallowForceAllAttributes clan;
-        type = "ThrownError";
+      expected = true;
-        msg = "A definition for option `directory' is not of type `absolute path*";
-      };
     };
 
   test_only_required =
     let
-      config = evalClan {
+      clan = buildClan {
         self = {
           inputs = { };
           outPath = ./.;
         };
         meta.name = "test";
-        imports = [ ./clan/module.nix ];
       };
     in
     {
-      expr = shallowForceAllAttributes config;
+      expr = shallowForceAllAttributes clan;
       expected = true;
     };
 
   test_all_simple =
     let
-      config = evalClan {
+      config = buildClan {
         self = {
           inputs = { };
         };
@@ -70,7 +61,7 @@ in
 
   test_outputs_clanInternals =
     let
-      config = evalClan {
+      config = buildClan {
         self = {
           inputs = { };
         };