Cfn-python-lint: W2001 reported when parameter used inside DefinitionBody

[JohGiz]

cfn-lint version: 0.19.1

Error W2001 that parameter is not used thrown when the parameter exists inside only inside the DefinitionBody in a OpenAPI spec.

Example template that reproduces 3 errors that parameters are not used when they exists only inside the DefinitionBody.

AWSTemplateFormatVersion: '2010-09-09'
Transform: 'AWS::Serverless-2016-10-31'

Parameters:
  ECSStack:
    Type: String
  AppStack:
    Type: String
  CognitoStackName:
    Type: String

Resources:
  MyAPI:
    Type: AWS::Serverless::Api
    Properties:
      StageName: dev
      EndpointConfiguration: EDGE
      DefinitionBody:        
        openapi: 3.0.1
        paths:
          /:
            get:
              x-amazon-apigateway-integration:
                connectionId: 
                  Fn::ImportValue: 
                    !Sub ${ECSStack}-VPCLink
                uri: 
                  Fn::Sub:
                    - http://${EndpointUri}/
                    - EndpointUri: !ImportValue
                        Fn::Sub: ${AppStack}-PrivateDNSEndpoint

          securitySchemes:
            cognitoAuth:
              type: apiKey
              name: Authorization
              in: header
              x-amazon-apigateway-authtype: cognito_user_pools
              x-amazon-apigateway-authorizer:
                type: cognito_user_pools
                providerARNs: 
                  - Fn::ImportValue: !Sub ${CognitoStackName}-Arn

Template above results in the following failure:

W2001 Parameter ECSStack not used.
min_api.yml:5:3

W2001 Parameter AppStack not used.
min_api.yml:7:3

W2001 Parameter CognitoStackName not used.
min_api.yml:9:3

[kddejong]

Yea going to be working on that shortly. The SAM translator plugs in values for those parameters, which results in them no longer being there (Removal of the Ref and a value instead). We lint the translated template so I need to find a way to handle that.

[kddejong]

Fixed with release v0.20.0