text: # Copyright 2014 Amazon.com, Inc. or its affiliates. All Rights Reserved.
  #
  # Licensed under the Apache License, Version 2.0 (the "License"). You
  # may not use this file except in compliance with the License. A copy of
  # the License is located at
  #
  # http://aws.amazon.com/apache2.0/
  #
  # or in the "license" file accompanying this file. This file is
  # distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
  # ANY KIND, either express or implied. See the License for the specific
  # language governing permissions and limitations under the License.
  import logging
  
  from awscli.customizations.s3.syncstrategy.base import SizeAndLastModifiedSync
  
  
  LOG = logging.getLogger(__name__)
  
  
  EXACT_TIMESTAMPS = {'name': 'exact-timestamps', 'action': 'store_true',
                      'help_text': (
                          'When syncing from S3 to local, same-sized '
                          'items will be ignored only when the timestamps '
                          'match exactly. The default behavior is to ignore '
                          'same-sized items unless the local version is newer '
                          'than the S3 version.')}
  
  
  class ExactTimestampsSync(SizeAndLastModifiedSync):
  
      ARGUMENT = EXACT_TIMESTAMPS
  
      def compare_time(self, src_file, dest_file):
          src_time = src_file.last_update
          dest_time = dest_file.last_update
          delta = dest_time - src_time
          cmd = src_file.operation_name
          if cmd == 'download':
              return self.total_seconds(delta) == 0
          else:
              return super(ExactTimestampsSync, self).compare_time(src_file,
                                                                   dest_file)
  