defmodule ExCatalog.Util do
  def module_compiled?(module) do
    function_exported?(module, :__info__, 1)
  end

  def list_all(filepath) do
    _list_all(filepath)
  end

  defp _list_all(filepath) do
    cond do
      String.contains?(filepath, ".git") -> []
      true -> expand(File.ls(filepath), filepath)
    end
  end

  defp expand({:ok, files}, path) do
    files
    |> Enum.flat_map(&_list_all("#{path}/#{&1}"))
  end

  defp expand({:error, _}, path) do
    [path]
  end
end