class Nokogiri::VersionInfo

def to_hash
  hash_info = {}
  hash_info['warnings']              = []
  hash_info['nokogiri']              = Nokogiri::VERSION
  hash_info['ruby']                  = {}
  hash_info['ruby']['version']       = ::RUBY_VERSION
  hash_info['ruby']['platform']      = ::RUBY_PLATFORM
  hash_info['ruby']['description']   = ::RUBY_DESCRIPTION
  hash_info['ruby']['engine']        = engine
  hash_info['ruby']['jruby']         = jruby? if jruby?
  if libxml2?
    hash_info['libxml']              = {}
    hash_info['libxml']['binding']   = 'extension'
    hash_info['libxml']['compiled']  = compiled_parser_version
    hash_info['libxml']['loaded']    = loaded_parser_version
    hash_info['warnings']            = warnings
  end
  hash_info
end