[CLI] cdk deploy breaks when bootstrapping with --qualifier that is too large

[Chris Roskelley]

Using a long qualifier name causes IAM error because the IAM Role name limit is 64 characters.

Use Case

I created a rather long name for my stack. And I used the --qualifier option as well and it was long to. This is because I like descriptive names in the various consoles that have resources created after the CDK is deployed. Besides the default qualifier of hnb659fds is kind of useless.

Proposed Solution

I would suggest that the --qualifier be limited to 9 characters and that it be checked before the bootstrap is executed and an error reported to the user.

For example a naive fix could be applied here by using Cloudformation's AllowedPatterns and ConstraintDescription

This is a 🚀 Feature Request