Full HTML page (with asset) hashing

hash.rb

#!/usr/bin/env ruby
require 'tmpdir'
require 'digest/sha1'

hash = ""
Dir.mktmpdir do |dir|
  `cd #{dir} && wget -E -H -k -K -q -p #{ARGV[0]}`
  Dir["#{dir}/**/*"].each do |filename|
    unless File.directory?(filename)
      # puts filename
      hash = Digest::SHA1.hexdigest(hash + File.read(filename))
    end
  end
end
puts hash