Description
A gem that ensures only one instance of your main script is running.
In short, there can be only one.
Installation
gem install highlander
Synopsis
require 'highlander'
ruby your_script.rb
ruby your_script.rb
Notes
Simply requiring the highlander gem ensures that only one instance
of that script cannot be started again. If you try to start it again
it will raise a RuntimeError.
Known Issues
If you start your program, modify it while its running, and run it again
then this library will not work.
Acknowledgements
Ara Howard for ideas.
License
Artistic 2.0
Copyright
(C) 2010-2014 Daniel J. Berger
All Rights Reserved.
Warranty
This package is provided "as is" and without any express or
implied warranties, including, without limitation, the implied
warranties of merchantability and fitness for a particular purpose.
Author
Daniel Berger