Have a way to regen bakeddata for a single key or a key prefix

[Manishearth]

cargo make bakeddata <component> is slow for many components (especially datetime), but usually you know which keys you've actually changed. Would be nice if you could run cargo make bakeddata datetime datetime/symbols/ to generate all symbols keys.

The main thing that is tricky is that you can't simply regen those keys.

Triage suggestion: some form of backlog, very much a "nice to have internal improvement"

[robertbastian]

This will be annoying to do, because make-bakeddata (and baked exporter) works on a data crate at a time.

[Manishearth]

Yeah I expect so, this is an extremely aspirational issue. It would involve some refactoring.