gistfile1.ex

def gen_module(file, rest_body) do
  # load things from the file here and assign them to variables
  Module.create(<name>, quote bind_quoted: [rest_body: rest_body, var1: var1, ...] do
    # now unquote() can be called here freely, it will be deferred until module compilation
    # therefore, you can copy-paste your previous in-line code without the file loading part
    def unquote(...)(...) do
      unquote(...)
    end
    
    ...
    
    rest_body
  end)
end

# in another file else
gen_module("file.txt", quote do
  def latitude do
    :random.seed(:erlang.now)
    ((:random.uniform * 180) - 90)
  end
  
  def longitude do
    :random.seed(:erlang.now)
    ((:random.uniform * 360) - 180)
  end
  
  def street_address(true), do: street_address <> " " <> secondary_address
  def street_address(_), do: street_address
end