grantPublicAccess() not granting access on an already existing bucket created manually

[marcindulak]

On https://docs.aws.amazon.com/cdk/api/latest/docs/aws-s3-readme.html#importing-existing-buckets there is an example which modifies access permissions on an already existing bucket, created manually from the AWS web console.

The example below does not modify the access permissions on the bucket, and the generated cdk.out/MyS3.template.json has an empty object.

Using https://github.com/aws/aws-cdk/releases/tag/v1.32.2 with typescript.

import cdk = require('@aws-cdk/core');
import s3 = require('@aws-cdk/aws-s3');

class MyS3 extends cdk.Stack {
  constructor(scope: cdk.App, id: string, props?: cdk.StackProps) {
    super(scope, id, props);

    const bucket = s3.Bucket.fromBucketName(this, 'bucket', 'my-bucket-random-string');
    bucket.grantPublicAccess();
  }
}

const app = new cdk.App();
new MyS3(app, 'MyS3');
app.synth();

---

This is a 📕 documentation issue

[iliapolo]

Related to #6548

[iliapolo]

The fix for this issue should just be a documentation change in the example. The broader scope and solution will be discussed and resolved as part of #6548

[github-actions]

⚠️COMMENT VISIBILITY WARNING⚠️

Comments on closed issues are hard for our team to see.
If you need more assistance, please either tag a team member or open a new issue that references this one.
If you wish to keep having a conversation with other community members under this issue feel free to do so.