A ruby client to update ip to zoneedit

zoneedit_updater.rb

#! /usr/bin/ruby
unless ARGV.size >= 3
  puts "USAGE: zoneedit_updater.rb username password domain [force [IP]]"
  exit
end

USERNAME = ARGV[0]
PASSWORD = ARGV[1]
DOMAIN = ARGV[2]

IP_FILE = File.dirname(__FILE__) + "/.zoneedit_ip"

File.delete(IP_FILE) if ARGV[3] && File.exists?(IP_FILE)

previous_ip = File.exists?(IP_FILE) ? File.read(IP_FILE) : nil
current_ip = ARGV[4] || `curl -s www.whatismyip.com/automation/n09230945.asp`
puts "Current Public IP: #{current_ip}"

if previous_ip != current_ip
  puts `curl -s -u #{USERNAME}:#{PASSWORD} 'http://dynamic.zoneedit.com/auth/dynamic.html?host=#{DOMAIN}'`
  File.open(IP_FILE, "w"){|f| f << current_ip}
end