REPL field

[brekk]

It'd be cool to have a repl field in madlib.json which would allow for the user to provide a set of values which get injected into the REPL automatically within a project.

"repl": "src/Repl.mad",

import Lib from "@/Library"

inject = (__REPL__) => ({
  core: Lib.core,
  a: 5,
  b: 6,
  example: () => __REPL__.core(__REPL__.a, __REPL__.b)
})

So with the above, if the user ran madlib repl, it would behave as though someone had run:

import Lib from "./src/Library"
main = {
  core: Lib.core,
  a: 5,
  b: 6,
  example: () => Lib.core(5, 6)
}

(Or similar, not sure if a dynamic __REPL__ variable is a good idea or not)