CoffeeScript command line extension : comments and output minification

ext.coffee

# Quoted in http://ww.zenithar.org/2012/04/06/iced-coffeescript-minification/
# Based on https://github.com/jashkenas/coffee-script/wiki/%5BExtensibility%5D-Hooking-into-the-Command-Line-Compiler
# 
# Don't forget to install UglifyJS
#  npm install -g uglify-js
#
# CoffeeScript = require 'coffee-script'
CoffeeScript = require 'iced-coffee-script'
{parser, uglify} = require 'uglify-js'

CoffeeScript.on 'success', (task) ->
  ast = parser.parse task.output
  code = uglify.gen_code uglify.ast_squeeze uglify.ast_mangle ast, extra: yes
  task.output = """
    /**
     * My Fancy minified javascript file
     * Blah blah blah
     * Copyright (c) #{ new Date().getFullYear() } Thibault NORMAND
     **/\n
  """ + code