Filtering Logger output

[fhunleth]

Seeing log messages has been helpful, but sometimes unrelated log messages get included as well. This happens when running Livebook on Nerves devices since it's not uncommon to see networking or other log messages get intermingled.

The unrelated log messages can be confusing, and I'm wondering how best to reduce the noise.

Some ideas that I've been thinking of:

1. Turn off all log messages for notebooks that don't need them
2. Add a default log filter in Nerves Livebook to silence noisy libraries. Unfortunately, logs from some noisy libraries can be useful in a couple notebooks, so I'd have to remove the filter there.
3. Write a SmartCell that helps configure a filter which log messages to show. (I'm new to

I was wondering if others had run into this too and how they solved it.

[josevalim]

The reason we started logging was precisely because libraries could log something important that would not be visible to the user, so I would say option 2 is the way to go. Perhaps with some UI you can encapsulate in NervesLivebook?

[fhunleth]

Sounds good. I'll take a look into that. Thanks!