bevy/examples/app/logs.rs
Mark Schmale 1ba7429371 Doc/module style doc blocks for examples (#4438)
# Objective

Provide a starting point for #3951, or a partial solution. 
Providing a few comment blocks to discuss, and hopefully find better one in the process. 

## Solution

Since I am pretty new to pretty much anything in this context, I figured I'd just start with a draft for some file level doc blocks. For some of them I found more relevant details (or at least things I considered interessting), for some others there is less. 

## Changelog

- Moved some existing comments from main() functions in the 2d examples to the file header level
- Wrote some more comment blocks for most other 2d examples

TODO: 
- [x] 2d/sprite_sheet, wasnt able to come up with something good yet 
- [x] all other example groups...


Also: Please let me know if the commit style is okay, or to verbose. I could certainly squash these things, or add more details if needed. 
I also hope its okay to raise this PR this early, with just a few files changed. Took me long enough and I dont wanted to let it go to waste because I lost motivation to do the whole thing. Additionally I am somewhat uncertain over the style and contents of the commets. So let me know what you thing please.
2022-05-16 13:53:20 +00:00

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1.3 KiB
Rust

//! This example illustrates how to use logs in bevy.
use bevy::prelude::*;
fn main() {
App::new()
// Uncomment this to override the default log settings:
// .insert_resource(bevy::log::LogSettings {
// level: bevy::log::Level::TRACE,
// filter: "wgpu=warn,bevy_ecs=info".to_string(),
// })
.add_plugins(DefaultPlugins)
.add_system(log_system)
.run();
}
fn log_system() {
// here is how you write new logs at each "log level" (in "least important" to "most important"
// order)
trace!("very noisy");
debug!("helpful for debugging");
info!("helpful information that is worth printing by default");
warn!("something bad happened that isn't a failure, but thats worth calling out");
error!("something failed");
// by default, trace and debug logs are ignored because they are "noisy"
// you can control what level is logged by adding the LogSettings resource
// alternatively you can set the log level via the RUST_LOG=LEVEL environment variable
// ex: RUST_LOG=trace, RUST_LOG=info,bevy_ecs=warn
// the format used here is super flexible. check out this documentation for more info:
// https://docs.rs/tracing-subscriber/*/tracing_subscriber/filter/struct.EnvFilter.html
}