class Sprockets::UglifierCompressor

def initialize(options = {})
  # Feature detect Uglifier 2.0 option support
  if Uglifier::DEFAULTS[:copyright]
    # Uglifier < 2.x
    options[:copyright] ||= false
  else
    # Uglifier >= 2.x
    options[:copyright] ||= :none
  end
  @uglifier = ::Uglifier.new(options)
  @cache_key = [
    self.class.name,
    ::Uglifier::VERSION,
    VERSION,
    options
  ].freeze
end