Implement the resource trait on an preexisting struct / get tracing-appender working with bevy

[full ridge]

Hi, I've been trying to get Bevy to log to a file using samcarey's workaround here: https://github.com/bevyengine/bevy/issues/5233 . This involves disabling LogPlugin and replacing it with a duplicate library with some minor tweaks. I've done that successfully but i'm having trouble adding tracing's WorkerGuard as a resource (so it isn't dropped). Evidently it won't work because WorkerGuard doesn't implement the resource trait, which makes sense. Can anyone point me towards any examples/resources for implementing resource against things from non-bevy crates?

Ah-ha, I've found this: https://bevyengine.org/learn/book/migration-guides/0.8-0.9/

.. so I guess I have to take WorkerGuard and "wrap it in a tuple struct to bypass orphan rules". I won't lie, I haven't done any rust for half a year and that sentence might as well have said "reverse the polarity of the neutron flow" XD

Alright... Think I have to do something like this

#[derive(Resource)]
struct WorkerGuardResource(pub WorkerGuard);

getting closer...

[full ridge]

Yeah that did it.

Just incase anyone comes across this later, to make samcarey's workaround work in 0.91 you need to add something like

#[derive(Resource)]
struct WorkerGuardResource(WorkerGuard);

to your edited LogPlugin. Then instead of

app.insert_resource(worker_guard);

You'd need to have something like

let worker_guard_resource = WorkerGuardResource(worker_guard);
            app.insert_resource(worker_guard_resource);