避免ruby脚本重复运行的函数

 git clone git://github.com/weidewang/run_once.git
 cd run_once
 rake install

#!/usr/bin/env ruby

require 'rubygems'
require 'run_once'

# RunOnce.runing(:pid_dir => Dir::tmpdir,:file_name => $0)
# 
RunOnce.runing{|pid| 
  puts %Q~#{$0} is runing,pid is #{pid}~
  exit(0)
}

 # you code

exit(0)

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request