Make you hrl

extract_hrl.exs

{:ok, trees} = :code.lib_dir(:public_key)
               |> Path.join("include/OTP-PUB-KEY.hrl")
               |> :epp_dodger.parse_file()
constants = trees
            |> Enum.map(&:erl_syntax_lib.strip_comments/1)
            |> Enum.reject(&match?({:record, _},:erl_syntax_lib.analyze_attribute(&1)))
            |> Enum.map(fn {:tree, :attribute, {:attr, _, _, :none}, {:attribute, {:atom, _, :define}, [{:atom,_,_}=a,b]}} ->
              {:erl_syntax.concrete(a), :erl_syntax.concrete(b)};
              _ -> nil
            end)