when used with fsevent_watch.c from autotest, run the command specified in the loop.

fresher.rb

class FSEventRefresh
  def initialize
    @changed = false
  end

  def changed?
    if @changed
      @changed = false
      true
    else
      false
    end
  end

  def watch(dir)
    `./bin/fsevent_watch #{dir}`
    @changed = true
    self.watch(dir)
  end
end

f = FSEventRefresh.new
Thread.new do
  f.watch(ARGV[0])
end

f2 = FSEventRefresh.new
Thread.new do
  f2.watch(ARGV[1])
end

loop do
  if f.changed? || f2.changed?
    IO.popen("echo hello", "r") do |io|
      io.each_line do |line|
        puts line
      end
    end
  end
  Kernel.sleep 0.1
end