Watch Rakefile for HAML

rakefile.rb

# Save this file as rakefile.rb in your folder 
# within your .haml files.
# Start watching with 
# $ rake

include Rake::DSL
require 'rake/clean'

task :default => [:watch]

desc 'Watches all the .haml files in your directory and changes them to html'
task :watch do
  puts "HAML is watchin you!"
  require 'fssm'
  FSSM.monitor do
    path "#{File.dirname(__FILE__)}" do
      glob '**/*.{haml}'
      update {|base, relative| rebuild_haml(relative)}
      delete {|base, relative| rebuild_haml(relative)}
      create {|base, relative| rebuild_haml(relative)}
    end
  end
end

def rebuild_haml(relative)
  puts "HAML changes found in: #{relative}! Invoking HAML --->"  
  html = relative.sub( "haml", "html")
  sh "haml #{relative} #{html}"
end