More fun with pid files

Another way of handling pid files is a more ruby like way is:

#!/usr/bin/env ruby

class PidFile
  def initialize(filename, &code)
    unless set_pid(filename)
      raise RuntimeError.new("The process is already running")
    end

    code.call

    File.delete(filename)
  end

  private

  def set_pid(filename)
    # Same code as before
  end
end

And call it thus

PidFile.new("/var/run/app.pid") do
  puts "What we want to do"
end