Racket has a nice module system whereby a module is kept in a plain text .rkt file. For example,

#lang racket

(provide print-cake)

; draws a cake with n candles

(define (print-cake n)

  (show "   ~a   " n #\.)

  (show " .-~a-. " n #\|)

  (show " | ~a | " n #\space)

  (show "---~a---" n #\-))

 

(define (show fmt n ch)

  (printf fmt (make-string n ch))

  (newline))

is in cake.rkt so that

#+begin_src scheme :session ch2

(require "cake.rkt")

(print-cake (random 30))

#+end_src

produces the actual ascii -- albeit in the *Geiser dbg* buffer (or run from the associated REPL ch2):

; -*- geiser-scheme-implementation: racket -*-

(require "cake.rkt")

(print-cake (random 30))

=> #<void>

   .......................   

 .-|||||||||||||||||||||||-. 

 |                         | 

-----------------------------

So, this means I can do some Racket in org-mode, but the module side has to be outside. This seems not so elegant. Is there a babel language where the entire ecosystem is inside Emacs/org-mode? I'd like to have the module paradigm and have it all inside Emacs/org-mode.

LB