refactor rice into config

util/recursive-pkgs.nix

@@ -0,0 +1,28 @@
+{ lib }:
+let
+  getFiles =
+    path:
+    builtins.filter (i: lib.hasSuffix ".nix" (builtins.toString i)) (
+      lib.filesystem.listFilesRecursive path
+    );
+  getPkgsAttrs =
+    path:
+    let
+      prefix = builtins.toString path;
+    in
+    map (
+      file:
+      let
+        name = lib.pipe file [
+          builtins.toString
+          (lib.removePrefix (prefix + "/"))
+          (lib.removeSuffix ".nix")
+        ];
+      in
+      {
+        "${name}" = file;
+      }
+    ) (getFiles path);
+  getAllPkgs = path: lib.mergeAttrsList (getPkgsAttrs path);
+in
+getAllPkgs