fileset.nix

{ pkgs }:
with builtins;
with pkgs;
with lib.attrsets;
with stdenv;
with rec {
  deepReadDir = path:
    let 
      attrset = readDir path;
      go = name: value:
        if value == "directory" then
          deepReadDir (path + "/${name}")
        else
          path + "/${name}";
    in mapAttrs go attrset;

  freezeFiles = path: freezeFileSet (deepReadDir path);

  freezeFileSet = attrset: mapAttrsRecursive go attrset;

  go = _: filepath: "${filepath}"; 

}; {
  inherit freezeFiles;
}