Versioned S3 URIs

[hacker1024]

Is your feature request related to a problem?

S3 buckets can support versioned objects, which is useful to ensure that assets do not change unexpectedly.

At the moment, though, there is no way to download a specific version of an S3 object.

Proposed solution

A versionId parameter would be great:

builtins.fetchurl {
  name = "example";
  url = "s3://my-bucket?region=my-region&versionId=XXX";
};

This would be stored in ParsedS3URL and then given to S3Helper::getObject, which would then use GetObjectRequest::WithVersionId() when building the request.

Alternative solutions

None exist (short of using some sort of custom proxy server to inject this as an S3 endpoint).

Additional context

Checklist

• checked latest Nix manual (source)
• checked open feature issues and pull requests for possible duplicates

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[arianvp]

I think with #13752 we might get this for free? as long as the query parameter is preserved

[lovesegfault]

We don't get it for free, but implementing is easy: https://gist.github.com/lovesegfault/f909a8789f69f8c825af10bf78fd3d9a

I'll do it in a follow-up though, I want to get that thing merged.