You should get that looked at 
The next step would be to use something better than a shell script. I’m half trying to gauge how a big a pain this is for people and if it’s worth writing something a little nicer with options. Something like Rails’ bootstrapping templates would be nice (although I never actually used those).
OCaml and Racket are excellent if you want produce other DSLs so yeah, shell scripts would only be a first crippled prototype and nothing else. OCaml would be my first stop. They have a ton of libraries dealing with parsing and transforming stuff.
But that requires good tooling around parsing the languages themselves into a structured and well-standardized AST – and not necessarily the one their own compiler / runtime uses, too. And some languages, Elixir included, don’t have a standardized AST at all so this is still an area that the community must one day step up to fix.
There’s GitHub - doorgan/sourceror: Utilities to manipulate Elixir source code · GitHub attempting to fix the situation.
I’ve recently been getting into OCaml and even have a call today with a company that uses it 
@LostKobrakai Thanks for the link, I was unaware of this project!