{ lib, ... }:

with lib;

let
  # Recursively constructs an attrset of a given folder, recursing on directories,
  # value of attrs is the filetype
  foo = bar;

  getDir =
    (dir: mapAttrs (file: type:
      if type == "directory"
        then getDir "${dir}/${file}"
        else type)
      (builtins.readDir dir));

  # Collects all files of a directory as a list of strings of paths
  files =
    dir: collect isString
    (mapAttrsRecursive
      (path: type: concatStringsSep "/" path)
      (getDir dir));

in dir: map (file: dir + "/${file}")
  (filter (file:
    (!(hasSuffix ".lib.nix" file)) &&
      hasSuffix ".nix" file &&
        file != "default.nix") (files dir))