Possible to write directly to a file with one of the default exporters?

[trevor-vaughan]

I may be missing something in the docs, but I've been unable to find an inbuilt way to write directly to a file using one of the built-in exporters.

I'm currently just monkey-patching ConsoleMetricExporter but that feels like 100% the wrong approach. And yes, I could just write my own file exporter, but I wanted to see if I had overlooked something before doing that.

aws-otel has one and I see a placeholder in the docs so I feel like I haven't connected a few dots somewhere.

Why do I want this?

I want to bake Open Telemetry into CLI applications to be able to optionally capture the data and send it to one of many sources. This makes console a non-starter and falling back to a file would be the easiest next step for folks that don't want to (or can't) set up an entire set of services right away.