docs: def range_metadata(start, end, dst_folder, num_worker_threads=0, writers=[file_writer], geometry_check=None):
      """ Extra metadata for all products in a date range """
  
      assert isinstance(start, date)
      assert isinstance(end, date)
  
      delta = end - start
  
      dates = []
  
      for i in range(delta.days + 1):
          dates.append(start + timedelta(days=i))
  
      days = len(dates)
  
      total_counter = {
          'days': days,
          'products': 0,
          'saved_tiles': 0,
          'skipped_tiles': 0,
          'skipped_tiles_paths': []
      }
  
      def update_counter(counter):
          for key in iterkeys(total_counter):
              if key in counter:
                  total_counter[key] += counter[key]
  
      for d in dates:
          logger.info('Getting metadata of {0}-{1}-{2}'.format(d.year, d.month, d.day))
          update_counter(daily_metadata(d.year, d.month, d.day, dst_folder, writers, geometry_check,
                                        num_worker_threads))
  
      return total_counter