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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 ImageId(CloudFormationLintRule):
    id = "W2506"
    shortdesc = "Check if ImageId Parameters have the correct type"
    description = (
        "See if there are any refs for ImageId to a parameter "
        + "of inappropriate type. Appropriate Types are "
        + "[AWS::EC2::Image::Id, AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>]"
    )
    source_url = "https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/best-practices.html#parmtypes"
    tags = ["parameters", "ec2", "imageid"]

    def match(self, cfn):
        """Check CloudFormation ImageId Parameters"""

        matches = []

        # Build the list of refs
        imageidtrees = cfn.search_deep_keys("ImageId")
        valid_refs = cfn.get_valid_refs()
        allowed_types = [
            "AWS::EC2::Image::Id",
            "AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>",
        ]
        # Filter only resoureces
        imageidtrees = [x for x in imageidtrees if x[0] == "Resources"]
        for imageidtree in imageidtrees:
            imageidobj = imageidtree[-1]
            if isinstance(imageidobj, dict):
                if len(imageidobj) == 1:
                    for key, paramname in imageidobj.items():
                        if key == "Ref":
                            if paramname in valid_refs:
                                if valid_refs[paramname]["From"] == "Parameters":
                                    if (
                                        valid_refs[paramname]["Type"]
                                        not in allowed_types
                                    ):
                                        message = (
                                            f"Parameter {paramname} should be of type "
                                            f'[{", ".join(map(str, allowed_types))}]'
                                        )
                                        tree = ["Parameters", paramname]
                                        matches.append(RuleMatch(tree, message))
                else:
                    message = f'Inappropriate map found for ImageId on {"/".join(map(str, imageidtree[:-1]))}'
                    matches.append(RuleMatch(imageidtree[:-1], message))

        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