# File lib/compass/sass_extensions/functions/sprites.rb, line 118
  def sprite_file(map, sprite)
    sprite = convert_sprite_name(sprite)
    verify_map(map, "sprite")
    verify_sprite(sprite)
    if image = map.image_for(sprite.value)
      image_path = Pathname.new(File.expand_path(image.file))
      images_path = Pathname.new(File.expand_path(Compass.configuration.images_path))
      quoted_string(image_path.relative_path_from(images_path).to_s)
    else
      missing_image!(map, sprite)
    end
  end