meta_header_adapter

in lib/elastic/transport/meta_header.rb [108:141]
33 lines of code
17 McCabe index (conditional complexity)

      def meta_header_adapter
        if @transport_class == Transport::HTTP::Faraday
          version = '0'
          adapter_version = case @arguments[:adapter]
                   when :patron
                     version = Patron::VERSION if defined?(::Patron::VERSION)
                     { pt: version }
                   when :net_http
                     version = if defined?(Net::HTTP::VERSION)
                                 Net::HTTP::VERSION
                               elsif defined?(Net::HTTP::HTTPVersion)
                                 Net::HTTP::HTTPVersion
                               end
                     { nh: version }
                   when :typhoeus
                     version = Typhoeus::VERSION if defined?(::Typhoeus::VERSION)
                     { ty: version }
                   when :httpclient
                     version = HTTPClient::VERSION if defined?(HTTPClient::VERSION)
                     { hc: version }
                   when :net_http_persistent
                     version = Net::HTTP::Persistent::VERSION if defined?(Net::HTTP::Persistent::VERSION)
                     { np: version }
                   else
                     {}
                   end
          { fd: Faraday::VERSION }.merge(adapter_version)
        elsif defined?(Transport::HTTP::Curb) && @transport_class == Transport::HTTP::Curb
          { cl: Curl::CURB_VERSION }
        elsif defined?(Transport::HTTP::Manticore) && @transport_class == Transport::HTTP::Manticore
          { mc: Manticore::VERSION }
        end
      end