Q: oversimplified asynchronous flow control

crazy-way-to-do-serial-async-with.coffee

r = (
  ((next)->
    execute "#{if o?.sudo then 'sudo ' else ''}mkdir #{if o?.recursive then '-p ' else ''}#{if o?.chmod then '-m'+o.chmod+' ' else ''}#{name}", next
    return
  )(->((next)->
    #return next() unless o?.user or o?.group
    execute "#{if o?.sudo then 'sudo ' else ''}chown #{o?.user}:#{o?.group} #{name}", next
    return
  )(cb))
)

# will execute top to bottom and then call cb

Q.coffee

# oversimplified asynchronous flow control
module.exports = new: ->
  Q = []
  Q.then = (fn, args...) -> Q.push(-> args.push Q.next; fn.apply null, args); @
  Q.next = (err) -> Q.splice 0, Q.length-1 if err; Q.shift()?.apply null, arguments
  Q.finally = (fn, args...) -> Q.push(-> fn.apply null, args); Q.next()
  Q