[AWS::Lambda::Function] - [Enhancement] - Add CodeSha256 output for use as AWS::Lambda::Version property

[sfussenegger]

Name of the resource

AWS::Lambda::Function

Resource name

No response

Description

Add CodeSha256 output from Lambda function config for use with Fn::GetAtt as input for AWS::Lambda::Version

Updated CloudFormation AWS::Lambda::Version Example:

Resources:
  function:
    Type: AWS::Lambda::Function
    Properties:
      Handler: index.handler
      Role: arn:aws:iam::123456789012:role/lambda-role
      Code:
        ZipFile: |
          exports.handler = async (event) => {
              console.log(JSON.stringify(event, null, 2));
              const response = {
                  statusCode: 200,
                  body: JSON.stringify('Hello from Lambda!'),
              };
              return response;
          };
      Runtime: nodejs18.x
      TracingConfig:
        Mode: Active
  version:
    Type: AWS::Lambda::Version
    Properties:
      FunctionName: !Ref function
      Description: v1
      CodeSha256: !GetAtt function.CodeSha256 # use new function.CodeSha256
      ProvisionedConcurrencyConfig:
        ProvisionedConcurrentExecutions: 20

Note: it might be useful to use UpdateReplacePolicy: Retain for some AWS::Lambda::Version use cases

Other Details

No response