Most of the way done with implementing support for export to S3 buckets with versioning enabled. This will make the files from the most recent git annex export be visible to users browsing the bucket, while letting git-annex download any of the content from previous exports too.

Still need to test it. And, deletion of old content from such a bucket is not supported, and my initial thoughts are that it might not be possible in a multi-writer situation. I need to think about it more.

This work is supported by the NSF-funded DataLad project.