Different approach for an AMD which doesn't have method chaining and looks more ideomatic in a CoffeeScript environment

definition.coffee

do ->
  cache = {}

  window.module = (name, defines) ->
    return undefined unless name and defines

    if typeof defines is 'function' then define = defines else {define, require, context} = defines

    require = [] unless require?
    context = @ unless context?

    if typeof require is 'string' then require = [require]
    cacheDeps = []
    (cacheDeps.push cache[i] if cache[i]) for i in require

    cache[name] = define.apply context, cacheDeps

usage.coffee

module 'teststring', -> 'test'

module 'testfun', -> (param) -> console.log param

module 'test'
  require: ['testfun', 'teststring']
  define: (testfun, teststring) -> testfun teststring