CloudFormation template excerpt - Lambda policy and CloudWatch event rule

cloudformation_policy_rule.yaml

WebPipelineNotifyPolicy:
  Type: AWS::Lambda::Permission
  Properties:
    Action: lambda:InvokeFunction
    FunctionName: !GetAtt WebPipelineNotifyFunction.Arn
    Principal: events.amazonaws.com
    SourceArn: !GetAtt WebPipelineNotifyRule.Arn

WebPipelineNotifyRule:
  Type: AWS::Events::Rule
  Properties:
    Description: Triggers notification on pipeline state changes ie deploys
    EventPattern:
      detail-type:
        - CodePipeline Pipeline Execution State Change
      source:
        - aws.codepipeline
    State: ENABLED
    Targets:
      - Arn: !GetAtt WebPipelineNotifyFunction.Arn
        Id: WebPipelineNotifyFunction