feat(buildClan): add clan.modules as output

lib/build-clan/interface.nix

@@ -72,6 +72,14 @@ in
       '';
     };
 
+    modules = lib.mkOption {
+      type = types.attrsOf types.raw;
+      default = { };
+      description = ''
+        An attribute set of exported modules.
+      '';
+    };
+
     templates = lib.mkOption {
       type = types.submodule { imports = [ ./templates/interface.nix ]; };
       default = { };

lib/build-clan/module.nix

@@ -208,7 +208,7 @@ in
     # TODO: unify this interface
     # We should have only clan.modules. (consistent with clan.templates)
     inherit (clan-core) clanModules clanLib;
-    modules = clan-core.clanModules;
+    modules = config.modules;
 
     inherit inventoryFile;
     inventoryValuesPrios =

lib/build-clan/public.nix

@@ -8,6 +8,7 @@
   # flake.clan.{name} <- clanInternals.{name}
   clan = [
     "templates"
+    "modules"
   ];
   # flake.{name} <- clan.{name}
   topLevel = [