Converting all ERb views to Haml, modified from http://snippets.dzone.com/posts/show/5449

to_haml.rb

require 'hpricot'
require 'ruby_parser'

class ToHaml
  def initialize(path)
    @path = path
  end

  def convert!
    Dir["#{@path}/**/*.erb"].each do |file|
      new_file = file.gsub(/\.erb$/, '.haml')
      `html2haml -rx #{file} #{new_file}`
      `rm #{file}`
    end
  end
end

path = File.join(File.dirname(__FILE__), 'app', 'views')
ToHaml.new(path).convert!