Gems/AWSGameLift/cdkv1/aws_gamelift/support_stack.py [20:66]:
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                 stack_name: str, fleet_configurations: dict, **kwargs) -> None:
        super().__init__(scope, id_, **kwargs)
        self._stack_name = stack_name
        self._support_iam_role = self._create_support_iam_role()

        for index in range(len(fleet_configurations)):
            # Update the fleet configuration to include the corresponding build id
            fleet_configurations[index]['build_configuration']['storage_location'] = self._upload_build_asset(
                fleet_configurations[index].get('build_configuration', {}), index)

    def _create_support_iam_role(self) -> iam.Role:
        """
        Create an IAM role for GameLift to read build files stored in S3.
        :return: Generated IAM role.
        """
        support_role = iam.Role(
            self,
            id=f'{self._stack_name}-SupportRole',
            assumed_by=iam.ServicePrincipal(
                service='gamelift.amazonaws.com'
            )
        )

        return support_role

    def _upload_build_asset(self, build_configuration: dict, identifier: int) -> dict:
        """
        Upload the local build files to S3 for a creating GameLift build.
        :param build_configuration: Configuration of the GameLift build.
        :param identifier: Unique identifier of the asset which will be included in the resource id.
        :return: Storage location of the S3 object.
        """
        build_asset = assets.Asset(
            self,
            id=f'{self._stack_name}-Asset{identifier}',
            path=build_configuration.get('build_path')
        )
        # Grant the support IAM role permission to read the asset
        build_asset.grant_read(self._support_iam_role)

        storage_location = {
            'bucket': build_asset.s3_bucket_name,
            'key': build_asset.s3_object_key,
            'role_arn': self._support_iam_role.role_arn
        }

        return storage_location
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