A way to capture Blueprint errors and output messages

[adamziel]

Currently there's no easy way to capture output messages and warnings/error messages coming from Blueprints. Let's add one. That could be as simple as accepting an onError(step: Step, message: string, isFatal: boolean); callback and onOutput(step: Step, message: string); callback. Nuance: Errors may also come from Resources and other non-step sources.

[seanmorris]

Rather than passing in a callback, would it be appropriate to expose the information via addEventHandler? then we're not locked into directing the information to a single place.

[dmsnell]

See WordPress/wordpress-playground#605

That PR creates a hook mechanism that could be used to report failures and errors.

[flexseth]

Possibly related tool suggestion

• Playground Tools: Console Logger - display console errors in the post editor wordpress-playground#1164