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

sh = (command, callback) ->
  exec command, (err, stdout, stderr) ->
    if err
      console.error stderr
      callback err
    else
      callback()

build = (watch, callback) ->
  if typeof watch is 'function'
    callback = watch
    watch = false
  options = ['-c', '-o', 'lib', 'src']
  options.unshift '-w' if watch
  
  coffee = spawn 'coffee', options
  coffee.stdout.on 'data', (data) -> print data.toString()
  coffee.stderr.on 'data', (data) -> print data.toString()
  coffee.on 'exit', (status) -> callback?() if status is 0

task 'build', 'Compile CoffeeScript source files', ->
  sh "rm -rf lib", ->
    build ->
      console.log "ok"

task 'watch', 'Recompile CoffeeScript source files when modified', ->
  build true