Tiny File System Event kicker

kick.rb

#!/usr/bin/env ruby
require 'rubygems'
require 'rb-fsevent'
cmd, *paths = ARGV

if cmd && paths.any?
  system cmd
  fsevent = FSEvent.new
  fsevent.watch(paths) { system cmd }
  fsevent.run
else
  puts "How to run: kick 'cmd' path1 [path2]"
end

I’ve had problems with Kicker (and Listen) on Mountain Lion so I decided to write a tiny replacement to use until they get fixed.

Is it supposed to run before any event, on line 7?

Yes (I mainly use it to run my specs, and I want feedback as soon as possible)

How I use it for the old Rails project I’m working on right now: kick 'clear && rake' app lib spec