lib:
{ root, exclude ? [] }:
with builtins; with lib;

# http://chriswarbo.net/projects/nixos/useful_hacks.html
let
  isMatch = name: type: (hasSuffix ".nix" name || type == "directory")
                     && ! elem name exclude;

  entry = name: _: {
    name = removeSuffix ".nix" name;
    value = import (root + "/${name}");
  };
in
  mapAttrs' entry (filterAttrs isMatch (readDir root))