module Sprockets::PathDigestUtils

def stat_digest(path, stat)
  if stat.directory?
    # If its a directive, digest the list of filenames
    digest_class.digest(self.entries(path).join(','))
  elsif stat.file?
    # If its a file, digest the contents
    digest_class.file(path.to_s).digest
  else
    raise TypeError, "stat was not a directory or file: #{stat.ftype}"
  end
end