module Middleman::Features::RelativeAssets

def registered(app)
  app.compass_config do |config|
    config.relative_assets = true
  end
  app.register_asset_handler :relative_assets do |path, prefix, request|
    begin
      prefix = app.images_dir if prefix == app.http_images_path
    rescue
    end
    if path.include?("://")
      app.before_asset_handler(:relative_assets, path, prefix, request)
    elsif path[0,1] == "/"
      path
    else
      path = app.before_asset_handler(:relative_assets, path, prefix, request).sub(%r{^/}, '')
      # path = File.join(prefix, path) if prefix.length > 0
      request_path = request.path_info.dup
      request_path << app.index_file if path.match(%r{/$})
      request_path.gsub!(%r{^/}, '')
      parts = request_path.split('/')
      if parts.length > 1
        arry = []
        (parts.length - 1).times { arry << ".." }
        arry << path
        File.join(*arry)
      else
        path
      end
    end
  end
end