(aws-batch): create fargate environment with Cfn classes

[mazerte]

Hello,

I got a lot of trouble to create a Fargate environment in AWS Batch with the CDK. The problem is only linked to a type issues. When you when to create a Fargate compute environment you shouldn't provide instanceRole, instanceTypes and minvCpu but the CDK enforce it.

Reproduction Steps

    const batchRole = new iam.Role(this, 'BatchRole', {
      assumedBy: new iam.ServicePrincipal('batch.amazonaws.com'),
      managedPolicies: [
        iam.ManagedPolicy.fromAwsManagedPolicyName('service-role/AWSBatchServiceRole')
      ],
    });

    const sg = new ec2.CfnSecurityGroup(this, 'ComputeEnvironmentSG', {
      vpcId: vpcId.valueAsString,
      groupDescription: 'Bust Tests Environment Security Group'
    })
    
    const computeEnvironment = new batch.CfnComputeEnvironment(this, 'ComputeEnvironment', {
      type: 'MANAGED',
      serviceRole: batchRole.roleArn,
      computeResources: {
        type: 'FARGATE_SPOT',
        subnets: subnets.valueAsList,
        maxvCpus: 256,
        securityGroupIds: [
          sg.ref
        ]
      }
    });

What did you expect to happen?

I don't expect to see type errors

What actually happened?

The CDK isn't able to compile the stack due to the errors

Environment

• CDK CLI Version : 1.82
• Framework Version:
• Node.js Version: v12.19.0
• OS : MacOS
• Language (Version): TypeScript (3.8.3) (guessing all)

Other

I try to fix the error locally by manually editing @aws-cdk/aws-batch/lib/batch.generated.d.ts by adding ? to the concerned porperties and @aws-cdk/aws-batch/lib/batch.generated.ts by commenting the lines errors.collect(cdk.propertyValidator('instanceRole', cdk.requiredValidator)(properties.instanceRole)); (and the others). After that everything work fine on CloudFormation side.

---

This is 🐛 Bug Report

[iliapolo]

Closing as duplicate of #12028.

See #12028 (comment) for a workaround.

[github-actions]

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