def list_s3_buckets()

in Gems/AWSCore/Code/Tools/ResourceMappingTool/utils/aws_utils.py [0:0]

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

def list_s3_buckets(region: str = "") -> List[str]:
    s3_client: BaseClient = _initialize_boto3_aws_client(AWSConstants.S3_SERVICE_NAME, region)
    try:
        response: Dict[str, any] = s3_client.list_buckets()
    except ClientError as error:
        raise RuntimeError(error_messages.AWS_SERVICE_REQUEST_CLIENT_ERROR_MESSAGE.format(
            "list_buckets", error.response['Error']['Code'], error.response['Error']['Message']))

    bucket_names: List[str] = []
    bucket: Dict[str, any]
    for bucket in response["Buckets"]:
        try:
            bucket_name: str = bucket["Name"]
            location_response: Dict[str, any] = s3_client.get_bucket_location(Bucket=bucket_name)
            # Buckets in Region us-east-1 have a LocationConstraint of null .
            # https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3.html#S3.Client.get_bucket_location
            if ((location_response["LocationConstraint"] == region) or
                    (not location_response["LocationConstraint"] and region == "us-east-1")):
                bucket_names.append(bucket_name)
        except ClientError as error:
            raise RuntimeError(error_messages.AWS_SERVICE_REQUEST_CLIENT_ERROR_MESSAGE.format(
                "get_bucket_location", error.response['Error']['Code'], error.response['Error']['Message']))
    return bucket_names