You can use some simple meta programming like this:

defmodule Delegate do
  @delegate_functions ~w(a b c d e f)a
  
  for fun <- @delegate_functions do
    defdelegate unquote(fun)(), to: OtherModule
  end
end

This is a very valid way but for what it’s worth I’d either add all delegates by hand or make a short sed or awk script do it for me.

Using metaprogramming for such a simple task hurts readability and the ease of future reverse-engineering effort required to maintain the code.

Just adding nuance to your already valid advice.

There’s a better way to do this if module_path is a list of strings:

module_path
|> Enum.map(&String.to_atom/1)
|> Module.concat()

If it’s a list of atoms (like it seems to be from your post) then just remove the Enum.map part and use Module.concat directly.