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"""
Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: MIT-0
"""
from cfnlint.rules import CloudFormationLintRule, RuleMatch


class AvailabilityZone(CloudFormationLintRule):
    """Check Availibility Zone parameter checks"""

    id = "W3010"
    shortdesc = "Availability Zone Parameters should not be hardcoded"
    description = "Check if an Availability Zone property is hardcoded."
    source_url = "https://github.com/aws-cloudformation/cfn-python-lint"
    tags = ["parameters", "availabilityzone"]

    def __init__(self):
        """Init"""
        super().__init__()
        resource_type_specs = [
            "AWS::AutoScaling::AutoScalingGroup",
            "AWS::DAX::Cluster",
            "AWS::DMS::ReplicationInstance",
            "AWS::EC2::Host",
            "AWS::EC2::Instance",
            "AWS::EC2::Subnet",
            "AWS::EC2::Volume",
            "AWS::ElasticLoadBalancing::LoadBalancer",
            "AWS::OpsWorks::Instance",
            "AWS::RDS::DBCluster",
            "AWS::RDS::DBInstance",
        ]

        property_type_specs = [
            # Singular
            "AWS::EC2::LaunchTemplate.Placement",
            "AWS::EC2::SpotFleet.LaunchTemplateOverrides",
            "AWS::EC2::SpotFleet.SpotPlacement",
            "AWS::EMR::Cluster.PlacementType",
            "AWS::ElasticLoadBalancingV2::TargetGroup.TargetDescription",
            "AWS::Glue::Connection.PhysicalConnectionRequirements",
        ]

        for resource_type_spec in resource_type_specs:
            self.resource_property_types.append(resource_type_spec)
        for property_type_spec in property_type_specs:
            self.resource_sub_property_types.append(property_type_spec)

    # pylint: disable=W0613
    def check_az_value(self, value, path):
        matches = []

        # value of `all` is a valide exception in AWS::ElasticLoadBalancingV2::TargetGroup
        if value not in ["all"]:
            if path[-1] != ["Fn::GetAZs"]:
                message = "Don't hardcode {0} for AvailabilityZones"
                matches.append(RuleMatch(path, message.format(value)))

        return matches

    def check(self, properties, resource_type, path, cfn):
        """Check itself"""
        matches = []

        matches.extend(
            cfn.check_value(
                properties,
                "AvailabilityZone",
                path,
                check_value=self.check_az_value,
                check_ref=None,
                check_find_in_map=None,
                check_split=None,
                check_join=None,
            )
        )
        matches.extend(
            cfn.check_value(
                properties,
                "AvailabilityZones",
                path,
                check_value=self.check_az_value,
                check_ref=None,
                check_find_in_map=None,
                check_split=None,
                check_join=None,
            )
        )

        return matches

    def match_resource_sub_properties(self, properties, property_type, path, cfn):
        """Match for sub properties"""
        matches = []

        matches.extend(self.check(properties, property_type, path, cfn))

        return matches

    def match_resource_properties(self, properties, resource_type, path, cfn):
        """Check CloudFormation Properties"""
        matches = []

        matches.extend(self.check(properties, resource_type, path, cfn))

        return matches

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 0755
AllowedPattern.py File 5.76 KB 0644
AllowedValue.py File 4.8 KB 0644
AtLeastOne.py File 4.11 KB 0644
AvailabilityZone.py File 3.41 KB 0644
BasedOnValue.py File 6.33 KB 0644
Exclusive.py File 3.98 KB 0644
ImageId.py File 2.37 KB 0644
Inclusive.py File 3.7 KB 0644
JsonSize.py File 6.08 KB 0644
ListDuplicates.py File 4.39 KB 0644
ListDuplicatesAllowed.py File 4.76 KB 0644
ListSize.py File 4.88 KB 0644
NumberSize.py File 4.88 KB 0644
OnlyOne.py File 3.89 KB 0644
Password.py File 3.63 KB 0644
Properties.py File 27.49 KB 0644
PropertiesTemplated.py File 2.44 KB 0644
Required.py File 4.1 KB 0644
RequiredBasedOnValue.py File 831 B 0644
StringSize.py File 4.52 KB 0644
UnwantedBasedOnValue.py File 837 B 0644
ValuePrimitiveType.py File 11.6 KB 0644
ValueRefGetAtt.py File 11.96 KB 0644
__init__.py File 106 B 0644