Getting started with tracing

[aevyrie]

I'm trying to add a tracing span to some functions with the intent of logging the output to the chrome-tracing JSON format. I've tried a few different paths with no luck.

I dove into the source to find an example of a stage being traced:

bevy/crates/bevy_ecs/src/schedule/mod.rs

Lines 145 to 147 in 841755a

	let stage_span = bevy_utils::tracing::info_span!("stage", name = name.as_str());
	#[cfg(feature = "trace")]
	let _stage_guard = stage_span.enter();

I tried to do the same in my code, but I'm not seeing anything in the tracing file when I open it up.
https://github.com/aevyrie/bevy_mod_picking/blob/fadcf59d15dd4d4fcc857ca67152b42f5ba1e10f/src/lib.rs#L447

My understanding is that assigning a span.enter() to a variable will start the clock, and it will span until it goes out of scope and is dropped.

[aevyrie]

Welp, it looks like I answered my own question - changing to an info_span!() instead of a tracing_span!() seems to have worked!

Code here for reference:
https://github.com/aevyrie/bevy_mod_picking/blob/8b30b5825bac5227ce36bd5f216d43e89e6418dd/src/lib.rs#L391-L392

I'll leave this here in case someone else has the same question.