snippet.rb

require 'rubygems'
require 'fssm'
require 'thor'

class Watcher < Thor
    include Thor::Actions
    
    def initialize(*args)
      super
    end
    
    desc "watch", "watch files on save and compile them"
    method_option :cp, :type => :boolean, :desc => "cp the files to the server"
    def watch
        FSSM.monitor do
            dir = "/path"
            path '.' do
                update do |b, r| 
                    if File.fnmatch('**.haml', r)
                        base = File.basename("#{r}", ".haml") + ".html"
                        puts "HAML #{r} to #{base}"
                        `haml --no-escape-attrs #{r} > #{base}`
                        %x[cp #{base} #{dir}/symbolic.keyboard.jsp] if options[:cp]
                    elsif File.fnmatch('**.sass', r)
                        base = File.basename("#{r}", ".sass") + ".css"
                        puts "*Sass: #{r} to #{base}"
                        %x[sass #{r} #{base}]
                        %x[cp #{base} #{dir}/css/symbolic.keyboard.css] if options[:cp]
                    elsif File.fnmatch('**.coffee', r)
                        base = File.basename("#{r}", ".coffee") + ".js"
                        puts "**Coffee: #{r} to #{base}"
                        %x[coffee -bc #{r}]
                        %x[docco #{r}]
                        %x[cp #{base} #{dir}/javascript/symbolic.keyboard.js] if options[:cp]
                    end
                end
            end
        end
    end
end
Watcher.start