def _get_principals()

in cfn-lint-serverless/cfn_lint_serverless/rules/lambda_.py [0:0]

• 11 lines of code
• 7 McCabe index (conditional complexity)

    def _get_principals(self, properties) -> List[str]:
        """
        Retrieve principals from assume role policy documents
        """

        principals = []

        for statement in properties.get("AssumeRolePolicyDocument", {}).get("Statement", []):
            if "Service" not in statement.get("Principal", {}):
                continue

            services = statement.get("Principal", {}).get("Service")

            if isinstance(services, str):
                principals.append(services)
            elif isinstance(services, list):
                principals.extend(services)
            # Ignored for now if it's not a list of str

        return principals