cdk_sar.py

from aws_cdk import Stack, aws_lambda, aws_sam
from constructs import Construct

POWERTOOLS_BASE_NAME = "AWSLambdaPowertools"
# Find latest from github.com/aws-powertools/powertools-lambda-python/releases
POWERTOOLS_VER = "3.0.9"
POWERTOOLS_ARN = (
    "arn:aws:serverlessrepo:eu-west-1:057560766410:applications/aws-lambda-powertools-python-layer-v3-python313-x86-64"
)


class SampleApp(Stack):

    def __init__(self, scope: Construct, id_: str) -> None:
        super().__init__(scope, id_)

        # Launches SAR App as CloudFormation nested stack and return Lambda Layer
        powertools_app = aws_sam.CfnApplication(
            self,
            f"{POWERTOOLS_BASE_NAME}Application",
            location={"applicationId": POWERTOOLS_ARN, "semanticVersion": POWERTOOLS_VER},
        )

        powertools_layer_arn = powertools_app.get_att("Outputs.LayerVersionArn").to_string()
        powertools_layer_version = aws_lambda.LayerVersion.from_layer_version_arn(
            self,
            f"{POWERTOOLS_BASE_NAME}",
            powertools_layer_arn,
        )

        aws_lambda.Function(
            self,
            "sample-app-lambda",
            runtime=aws_lambda.Runtime.PYTHON_3_13,
            function_name="sample-lambda",
            code=aws_lambda.Code.from_asset("lambda"),
            handler="hello.handler",
            layers=[powertools_layer_version],
        )