Error for template created with AWS SAM

cfn-lint version: (cfn-lint --version) cfn-lint 0.54.2

Description of issue. Displays an error for a freshly created template using AWS SAM

Please provide as much information as possible:

• Template linting issues:
  • Please provide a CloudFormation sample that generated the issue.

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  sam-app

  Sample SAM Template for sam-app
  
# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    Timeout: 3

Resources:
  HelloWorldFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      CodeUri: hello-world/
      Handler: app.lambdaHandler
      Runtime: nodejs14.x
      Architectures:
        - x86_64
      Events:
        HelloWorld:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            Path: /hello
            Method: get

Outputs:
  # ServerlessRestApi is an implicit API created out of Events key under Serverless::Function
  # Find out more about other implicit resources you can reference within SAM
  # https://github.com/awslabs/serverless-application-model/blob/master/docs/internals/generated_resources.rst#api
  HelloWorldApi:
    Description: "API Gateway endpoint URL for Prod stage for Hello World function"
    Value: !Sub "https://${ServerlessRestApi}.execute-api.${AWS::Region}.amazonaws.com/Prod/hello/"
  HelloWorldFunction:
    Description: "Hello World Lambda Function ARN"
    Value: !GetAtt HelloWorldFunction.Arn
  HelloWorldFunctionIamRole:
    Description: "Implicit IAM Role created for Hello World function"
    Value: !GetAtt HelloWorldFunctionRole.Arn

• If present, please add links to the (official) documentation for clarification.
• Validate if the issue still exists with the latest version of cfn-lint and/or the latest Spec files
• Feature request:
  • Please provide argumentation about the missing feature. Context is key! I just created a new serverless application using AWS SAM. I ran the following code:

sam init

Selected AWS Quick Start Templates, the Zip package type, Node14.0 as the runtime, and Hello World Example as the application. But the linter gives the follow error:

[cfn-lint] E0001: Error transforming template: Resource with id [HelloWorldFunction] is invalid. property Architectures not defined for resource of type AWS::Serverless::Function

Cfn-lint uses the CloudFormation Resource Specifications as the base to do validation. These files are included as part of the application version. Please update to the latest version of cfn-lint or update the spec files manually (cfn-lint -u)

[PatMyron]

Believe that should be fixed by https://github.com/aws-cloudformation/cfn-lint/pull/2124 or running cfn-lint -u

[omer-to]

Hi @PatMyron I guess you were right that it was installed with brew.

I ran brew uninstall cfn-lint to remove it, and then ran pip3 install cfn-lint to install it using pip. Here’s the output of pip3 install cfn-lint:

Successfully installed cfn-lint-0.54.2 jsonpatch-1.32 jsonpointer-2.1 junit-xml-1.9 networkx-2.6.3 pyyaml-5.4.1

And the good news is that the error I mentioned in the original post is gone, thought now I’m facing another one 😃 Once again this is the template.yaml (auto generated with sam init - helloworld example)

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: >
  sam-app

  Sample SAM Template for sam-app
  
# More info about Globals: https://github.com/awslabs/serverless-application-model/blob/master/docs/globals.rst
Globals:
  Function:
    Timeout: 3

Resources:
  
  HelloWorldFunction:
    Type: AWS::Serverless::Function # More info about Function Resource: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#awsserverlessfunction
    Properties:
      Handler: hello-world/build/index.handler
      Runtime: nodejs14.x
      Architectures:
        - x86_64
      Events:
        HelloWorld:
          Type: Api # More info about API Event Source: https://github.com/awslabs/serverless-application-model/blob/master/versions/2016-10-31.md#api
          Properties:
            Path: /hello
            Method: post
            RequestParameters:
              - method.request.querystring.name:
                  Required: true
                  Caching: false

The problem displayed by cfn-lint:

[cfn-lint] E3002: Invalid Property Resources/HelloWorldFunction/Properties/Architectures