lambda-template.yaml

# a CloudFormation template that represents the application being deployed via CodePipeline/Step Functions.
AWSTemplateFormatVersion: '2010-09-09'
Description: 'Creates a Lambda function'
Parameters:
  environmentName:
    Type: String
    AllowedValues:
      - dev
      - test
      - prod
    Description: Environment name, eg, dev, test, prod
Resources:
  LambdaExecutionRole:
      Type: AWS::IAM::Role
      Properties:
        AssumeRolePolicyDocument:
          Version: '2012-10-17'
          Statement:
          - Effect: Allow
            Principal:
              Service:
              - lambda.amazonaws.com
            Action:
            - sts:AssumeRole
        Path: "/"
        Policies:
        - PolicyName: root # just a comment
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
            - Effect: Allow
              Action:
              - logs:*
              Resource: arn:aws:logs:*:*:*
  SampleLambdaFunction:
    Type: "AWS::Lambda::Function"
    Properties:
      FunctionName: !Sub ${environmentName}_SampleLambdaFunction
      Handler: "index.handler"
      Code:
        ZipFile: !Sub |
          'use strict';
          exports.handler = (event, context, callback) => {
              console.log('Environment: ${environmentName}');
              // comment~ ooo
              console.log('Received event:', JSON.stringify(event));
              callback(null, JSON.stringify(event));
          };
      Runtime: "nodejs16.x" # "nodejs10.x"
      Timeout: "60" # 60
      Role:
        Fn::GetAtt:
          - "LambdaExecutionRole"
          - "Arn"