gistfile1.rb

module EmGlobWatcher
  # Setup to watch a glob on the file system.
  # If the glob is detected, the path of the matching file will be yielded to the block
  # You may pass it an interval on how often to scan the directory.
  # The block will be executed before the next interval is set
  # @param glob - The file glob to watch for
  # @param interval - The interval in seconds to poll the file system
  def self.watch(glob, interval = 0.5, &blk)
   raise "EventMacine must be running" unless EM.reactor_running?
   watcher = nil
   watcher = lambda do
     Dir.glob(glob).each do |f|
       blk.call f
     end
     EM.add_timer(interval, watcher)
   end

   EM.add_timer(interval, watcher)
 end
end