flake.nix

@@ -76,13 +76,9 @@
     { self, nixpkgs, ... }@inputs:
     let
       inherit (nixpkgs) lib;
-      flake = import ./flake { inherit lib inputs self; };
     in
     {
-      # Every host under hosts/ is discovered and built.
+      inherit (import ./flake { inherit lib inputs self; }) nixosConfigurations;
-      nixosConfigurations = flake.mkHosts {
-        root = self + "/hosts";
-      };
 
       # A project shell for agent-local resources that should travel with this
       # checkout rather than the operator's global profile.

flake/default.nix

@@ -4,55 +4,50 @@
   self,
 }:
 let
-  # TODO: refactor the registry code
-  registryAssembly = import ./registry.nix { inherit lib self; };
-
   util = import ../lib { inherit lib; };
-  mkModules = import ./module.nix { inherit util; };
 
-  modules = mkModules {
+  registry = import ./registry.nix {
+    inherit lib;
+    hosts = self.nixosConfigurations;
+    root = self + "/registry";
+  };
+
+  modules = import ./module.nix {
+    inherit util;
     root = self + "/modules";
   };
 
-  guestModules = guests.mkGuests {
+  guestModules = import ./guest.nix {
+    inherit
+      inputs
+      lib
+      registry
+      specialArgs
+      util
+      ;
+    repositoryModules = modules;
     root = self + "/guests";
   };
 
-  #----------------------------------------------------------
-
-  collectedRegistry = registryAssembly.collect { hosts = self.nixosConfigurations; };
-
   specialArgs = {
     inherit
       inputs
       self
       util
       ;
-    registry = collectedRegistry;
+    registry = registry.collected;
   };
-
+in
-  guests = import ./guest.nix {
+{
-    inherit
+  nixosConfigurations = import ./host.nix {
-      inputs
-      lib
-      specialArgs
-      registryAssembly
-      util
-      ;
-    repositoryModules = modules;
-  };
-
-  hosts = import ./host.nix {
     inherit
       inputs
       lib
       specialArgs
       guestModules
-      registryAssembly
       ;
+    registryModule = registry.module;
     repositoryModules = modules;
+    root = self + "/hosts";
   };
-in
-{
-  inherit (hosts) mkHosts;
 }

flake/guest.nix

@@ -1,9 +1,10 @@
 {
   inputs,
   lib,
+  root,
   specialArgs,
   repositoryModules,
-  registryAssembly,
+  registry,
   util,
 }:
 let
@@ -65,7 +66,7 @@ let
           enable = lib.mkEnableOption "a reverse-proxy route for this guest";
 
           route = lib.mkOption {
-            type = registryAssembly.definitions.route.type;
+            type = registry.types.route;
             description = "Route registry entry published for this guest.";
           };
         };
@@ -247,7 +248,7 @@ let
               inputs.stylix.nixosModules.stylix
 
               repositoryModules
-              registryAssembly.module
+              registry.module
               cfg.interior
 
               {
@@ -268,15 +269,11 @@ let
       };
     };
 in
+let
+  files = util.collectNixFiles root;
+  guestFiles = lib.filterAttrs (file: type: type == "regular" && lib.hasSuffix ".nix" file) (builtins.readDir root);
+  names = map (file: lib.removeSuffix ".nix" file) (lib.attrNames guestFiles);
+in
 {
-  mkGuests =
+  imports = files ++ map mkGuest names;
-    { root }:
-    let
-      files = util.collectNixFiles root;
-      guestFiles = lib.filterAttrs (file: type: type == "regular" && lib.hasSuffix ".nix" file) (builtins.readDir root);
-      names = map (file: lib.removeSuffix ".nix" file) (lib.attrNames guestFiles);
-    in
-    {
-      imports = files ++ map mkGuest names;
-    };
 }

flake/host.nix

@@ -1,12 +1,12 @@
 {
   inputs,
   lib,
+  root,
   specialArgs,
   repositoryModules,
 
   guestModules,
-  # TODO refactor registry
+  registryModule,
-  registryAssembly,
 }:
 let
   mkHost =
@@ -26,7 +26,7 @@ let
         guestModules
 
         # TODO: refactor
-        registryAssembly.module (root + "/${name}")
+        registryModule (root + "/${name}")
 
         {
           networking.hostName = name;
@@ -35,15 +35,11 @@ let
       ];
     };
 in
-{
+let
-  mkHosts =
+  directories = lib.filterAttrs (_name: type: type == "directory") (builtins.readDir root);
-    { root }:
+  names = lib.attrNames directories;
-    let
+in
-      directories = lib.filterAttrs (_name: type: type == "directory") (builtins.readDir root);
+lib.genAttrs names (
-      names = lib.attrNames directories;
+  name:
-    in
+  mkHost { inherit root name; }
-    lib.genAttrs names (
+)
-      name:
-      mkHost { inherit root name; }
-    );
-}

flake/module.nix

@@ -1,5 +1,7 @@
-{ util }:
+{
-{ root }:
+  root,
+  util,
+}:
 {
   imports = util.collectNixFiles root;
 }