DockerImageAsset.buildSsh should allow arrays

[jakajancar]

Describe the feature

It's ok to have multiple --ssh arguments to pass multiple named keys.

Use Case

Check out multiple private repositories on github using deployment keys. A single key cannot be authorized on multiple repos.

Proposed Solution

No response

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

CDK version used

2.188.0

Environment details (OS name and version, etc.)

linux

[pahud]

Hi @jakajancar,

Thank you very much for your thoughtful feature request!

Indeed, Docker BuildKit supports specifying multiple --ssh parameters, which is necessary when cloning from multiple private repositories each with distinct deployment keys. Currently, the CDK only allows passing a single string for buildSsh, which limits this functionality.

Our analysis confirms this is a valid limitation caused by the interface design (buildSsh?: string). Enhancing it to accept an array and generating multiple --ssh flags would elegantly solve this.

We encourage the community to contribute a PR to extend DockerImageAsset like this. It mainly entails changing the type to string | string[] and updating docker command argument serialization accordingly.

Thanks again for the suggestion.