nixos-config/modules/dev/lisp.nix

# Lisp is great, easy to learn, and weird.
# I've been using it to study creating languages and the famous SICP book.
# FUN FACT: Lisp is a family of languages with those parenthesis representing the mouth lisp, demonstrating how genetics work.
{ config, options, lib, pkgs, ... }:

with lib;

let
  cfg = config.modules.dev.lisp;
in {
  options.modules.dev.lisp = let
    mkBoolDefault = bool:
      mkOption {
        type = types.bool;
        default = bool;
      };
  in {
    clojure.enable = mkBoolDefault false;
    guile.enable = mkBoolDefault false;
    racket.enable = mkBoolDefault false;
  };

  config = {
    my.packages = with pkgs;
      (if cfg.clojure.enable then [
        clojure # Improved Java version.
        leiningen # Install Clojure projects without pulling your hair.
      ] else
        [ ]) ++

      (if cfg.guile.enable then
        [
          guile # A general-purpose language for stuff, named after a certain pop culture icon from an iconic fighting game.
        ]
      else
        [ ]) ++

      (if cfg.racket.enable then
        [
          racket # A DSL for DSLs.
        ]
      else
        [ ]);
  };
}