refactor(reverse-proxy): use route registry

lib/registry.nix

@@ -28,6 +28,23 @@ let
     in
     nameValuePair (registryName name) (import path { inherit lib; })
   ) (filterAttrs (name: type: type == "regular" && hasSuffix ".nix" name) (builtins.readDir (self + "/registry")));
+  join = registry: host: entry:
+    filterAttrs (_name: value: value != null) (
+      mapAttrs (registryName: _registry: (registry.${registryName}.${host} or { }).${entry} or null) definitions
+    );
+
+  collectData =
+    { hosts }:
+    mapAttrs (
+      registryName: _registry:
+      mapAttrs (hostName: host: host.config.registry.${registryName}.${hostName} or { }) hosts
+    ) definitions;
+
+  withOperations = registry:
+    registry
+    // {
+      join = host: entry: join registry host entry;
+    };
 in
 {
   inherit definitions;
@@ -36,10 +53,5 @@ in
     options.registry = mapAttrs (_name: registry: registryOption registry) definitions;
   };
 
-  collect =
-    { hosts }:
-    mapAttrs (
-      registryName: _registry:
-      mapAttrs (hostName: host: host.config.registry.${registryName}.${hostName} or { }) hosts
-    ) definitions;
+  collect = args: withOperations (collectData args);
 }