index2README task for simple litcoffee modules

Cakefile

{spawn} = require 'child_process'
fs = require 'fs'

task "build", "watch and build the source", ->
  compiler = spawn 'coffee', ['-cw', '.']
  compiler.stdout.on 'data', (data) -> console.log data.toString().trim()
  compiler.stderr.on 'data', (data) -> console.error data.toString().trim()

# Render your literate source as a GH-highlight-able code-fenced README (a tweak of journo's Cakefile)
task "readme", "render index as README", ->
  source = fs.readFileSync('index.coffee.md').toString()
  indented = /\n\n    ([\s\S]*?)\n\n(?!    )/mg
  asFenced = (match, code) ->
    dedented = code.replace(/^    /mg, '')
    "\n```coffeescript\n#{dedented}\n```\n"
  fs.writeFileSync 'README.coffee.md', source.replace(indented, asFenced)