# File lib/pry/default_commands/input.rb, line 170
        def process
          @history = Pry::Code(Pry.history.to_a)

          @history = case
            when opts.present?(:head)
              @history.between(1, opts[:head] || 10)
            when opts.present?(:tail)
              @history.between(-(opts[:tail] || 10), -1)
            when opts.present?(:show)
              @history.between(opts[:show])
            else
              @history
            end

          if opts.present?(:grep)
            @history = @history.grep(opts[:grep])
          end

          if opts.present?('exclude-pry''exclude-pry')
            @history = @history.select { |l, ln| !command_set.valid_command?(l) }
          end

          if opts.present?(:save)
            process_save
          elsif opts.present?(:clear)
            process_clear
          elsif opts.present?(:replay)
            process_replay
          else
            process_display
          end
        end