Quiet logging for emulators:exec

[samtstern]

See previous discussion here:
firebase/firebase-android-sdk#1690

For serve and emulators:start the UI is where we're going to improve logging. But for exec we should probably:

• Quiet all debug/verbose logging by default
• Consider preserving firebase-debug.log so that logs can be expected later

cc @filipesilva @abeisgoat

[gusaiani]

+1

[davdroman]

I have the same need. Here's my workaround I use in scripts for those interested.

#!/usr/bin/env bash
> out.log
tail -f out.log &
trap "kill $!" EXIT
firebase emulators:exec --non-interactive 'some_command | tee out.log; exit ${PIPESTATUS[0]}' &>/dev/null