fs            = require 'fs'
{print}       = require 'util'
{spawn, exec} = require 'child_process'

config = {}
config.binPath = './node_modules/.bin/'

# Spawns an application with `options` and calls `onExit`
# when it finishes.
run = (bin, options, onExit) ->
  bin = config.binPath + bin
  console.log timeNow() + ' - running: ' + bin + ' ' + (if options? then options.join(' ') else "")
  cmd = spawn bin, options
  cmd.stdout.on 'data', (data) -> print data.toString()
  cmd.stderr.on 'data', (data) -> print data.toString()
  cmd.on 'exit', (code) ->
    console.log 'done.'
    onExit?(code, options)

# Returns a string with the current time to print out.
timeNow = ->
  today = new Date()
  today.getHours() + ":" + today.getMinutes() + ":" + today.getSeconds()


buildAssets = ->
  options = ['-o', 'public/js/build.js']
  run 'r.js', options

task 'build', 'Builds what is needed for production', ->
  buildAssets()