1""" 2Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. 3SPDX-License-Identifier: MIT-0 4""" 5from cfnlint.rules import CloudFormationLintRule 6from cfnlint.rules import RuleMatch 7from cfnlint.helpers import LIMITS 8 9 10class LimitAttributes(CloudFormationLintRule): 11 """Check maximum Mapping attribute limit""" 12 id = 'I7012' 13 shortdesc = 'Mapping attribute limit' 14 description = 'Check if the amount of Mapping attributes in the template is approaching the upper limit' 15 source_url = 'https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html' 16 tags = ['mappings', 'limits'] 17 18 def match(self, cfn): 19 matches = [] 20 for mapping_name, mapping in cfn.template.get('Mappings', {}).items(): 21 for mapping_attribute_name, mapping_attribute in mapping.items(): 22 path = ['Mappings', mapping_name, mapping_attribute_name] 23 if LIMITS['threshold'] * LIMITS['Mappings']['attributes'] < len(mapping_attribute) <= LIMITS['Mappings']['attributes']: 24 message = 'The amount of mapping attributes ({0}) is approaching the limit ({1})' 25 matches.append(RuleMatch(path, message.format(len(mapping_attribute), LIMITS['Mappings']['attributes']))) 26 return matches 27