_why ?

README.md

$ curl -o pspc16 https://dl.dropboxusercontent.com/u/856934/pspcl6
$ chmod +x pspc16
$ gem install snoop terminal-notifier
$ ruby why.rb

why.rb

require 'snoop'

URL = 'http://whytheluckystiff.net'

def render(message)
  unless File.exists? "#{message}.pdf"
    `curl -o #{message} #{URL}/SPOOL/#{message} && \
     ./pspc16 -o #{message}.pdf -sDEVICE=pdfwrite #{message} && \
     rm #{message}`

    notify "_why: #{message}"
  end
end

def notify(message)
  puts message
  `terminal-notifier -message "#{message}"`
end

Snoop::HttpNotifier.new(url: URL).notify while: -> { true }, delay: 300 do |c|
  c.scan(/SPOOL\/(\w*)/).flatten.each { |message| render message }
end

TL;DR
What is it for ;)

@rhacker See http://words.steveklabnik.com/closure and https://github.com/steveklabnik/CLOSURE :)