The complete CloudFormation template

cloudformation.yaml

AWSTemplateFormatVersion: '2010-09-09'

Parameters:
  DeployBranch:
    Description: A git push to this branch will trigger CD with CodePipeline.
    Type: String

Resources:
  WebPipelineNotifyFunction:
    Type: AWS::Lambda::Function
    Properties:
      Code:
        ZipFile: |
            var SNS = require('aws-sdk/clients/sns')
            var sns = new SNS()

            exports.handler = async (event) => {
              console.log(JSON.stringify(event))
              const params = {
                Message: `Deploy of ${process.env.BRANCH} ${event.detail.state}`,
                TopicArn: process.env.TOPIC_ARN,
                Subject: `Deploy ${event.detail.state}`
              }
              console.log(JSON.stringify(params))
              return await sns.publish(params).promise()
            }
      Description: Notifies of deploys with SMS and email
      Environment:
        Variables:
          TOPIC_ARN: !Ref DevNotifyTopic
          BRANCH: !Ref DeployBranch
      Handler: index.handler
      Role: !GetAtt LambdaServiceRole.Arn
      Runtime: nodejs8.10
      Timeout: 10

  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

  DevNotifyTopic:
    Type: AWS::SNS::Topic
    Properties:
      DisplayName: Filmhub