cfn-lint prevents using SnapStart with Python 3.12 (w/SAM CLI)

[awsbrando]

CloudFormation Lint Version

1.20.2

What operating system are you using?

Amazon Linux 2

Describe the bug

On Nov 18 2024, SnapStart for Python 3.12 was launched (https://aws.amazon.com/about-aws/whats-new/2024/11/aws-lambda-snapstart-python-net-functions/). cfn-lint is giving lint errors about non-support when using sam validate --lint for templates that contain SnapStart and python3.12 as a runtime.

[[E2530: SnapStart supports the configured runtime] ('python3.12' is not supported for 'SnapStart' enabled functions) matched 137]
Error: Linting failed. At least one linting rule was matched to the provided template.

One area of the code where it is validating this can be found here --

cfn-lint/src/cfnlint/rules/resources/lmbd/SnapStartSupported.py

Line 100 in 700563c

and runtime not in ["java8.al2", "java8"]

Expected behavior

For cfn-lint properly validate SnapStart and not return unsupported SnapStart for Python 3.12.

NOTE: SnapStart for AWS Lambda is only supported in some region, as opposed to Java. The list may need to be modified and/or checked independently for now in the code.

Reproduction template

AWSTemplateFormatVersion: '2010-09-09'
Transform:
  - AWS::LanguageExtensions
  - AWS::Serverless-2016-10-31

Description: >
  SnapStart Sample (Python 3.12)

Parameters:
  Environment:
    Type: String
    Default: local
    AllowedValues:
      - local
      - dev

Globals:
  Function:
    Timeout: 30
    MemorySize: 1024
    Runtime: python3.12
    Architectures:
      - arm64
    Tracing: Active
    AutoPublishAlias: live

  SnapStartFunc:
    Type: AWS::Serverless::Function
    Properties:
      FunctionName: "snapstat-sample-api"
      CodeUri: src/

...

[valerena]

Official list of runtimes that support SnapStart right now: https://docs.aws.amazon.com/lambda/latest/dg/snapstart.html#snapstart-runtimes

• Java 11 and later
• Python 3.12 and later
• .NET 8 and later.