class Middleman::Extensions::AssetHash

def manipulate_single_resource(resource)
  return unless options.exts.include?(resource.ext)
  return if ignored_resource?(resource)
  return if resource.ignored?
  # Render through the Rack interface so middleware and mounted apps get a shot
  response = @rack_client.get(
    URI.escape(resource.destination_path),
    'bypass_inline_url_rewriter_asset_hash' => 'true'
  )
  raise "#{resource.path} should be in the sitemap!" unless response.status == 200
  digest = Digest::SHA1.hexdigest(response.body)[0..7]
  resource.destination_path = resource.destination_path.sub(/\.(\w+)$/) { |ext| "-#{digest}#{ext}" }
  resource
end