[Bug]: Prometheus: Using without_scope_info breaks with_resource_selector(ResourceSelector::All)

[Sushisource]

What happened?

See title. If you use without scope info, labels from a Resource are not applied exported metrics, even if you chose ResourceSelector::All.

The problematic bit of code is here: https://github.com/open-telemetry/opentelemetry-rust/blob/main/opentelemetry-prometheus/src/lib.rs#L324

OpenTelemetry API Version (i.e version of opentelemetry crate)

0.26

But for the prometheus crate, specifically commit e911383 because I was on 0.26 of everything else before that crate upgraded

Regardless, this code appears unchanged since then

OpenTelemetry SDK Version (i.e version of opentelemetry_sdk crate)

0.26

What Exporter(s) are you seeing the problem on?

Prometheus

Relevant log output

[cijothomas]

The best suggestion I can give at the moment is to see if you can switch to OTLP Exporter given OTLP is now accepted by Prometheus. We are not actively developing Prom dedicated exporter to focus on getting things to 1.0/stable!

If you need help setting up OTLP for Prometheus, I can help!

[Sushisource]

That's a bit tough for me given that I'm authoring a library, so my users find it very convenient to consume Prom metrics directly. I can make a PR to fix the issue if that'll be accepted.