module Sprockets::Dependencies

def resolve_dependency(str)
  # Optimize for the most common scheme to
  # save 22k allocations on an average Spree app.
  scheme = if str.start_with?('file-digest:'.freeze)
    'file-digest'.freeze
  else
    str[/([^:]+)/, 1]
  end
  if resolver = config[:dependency_resolvers][scheme]
    resolver.call(self, str)
  else
    nil
  end
end