bevy/examples/app/logs.rs
François 5622d56be1 Use plugin setup for resource only used at setup time (#6360)
# Objective

- Build on #6336 for more plugin configurations

## Solution

- `LogSettings`, `ImageSettings` and `DefaultTaskPoolOptions` are now plugins settings rather than resources

---

## Changelog

- `LogSettings` plugin settings have been move to `LogPlugin`, `ImageSettings` to `ImagePlugin` and `DefaultTaskPoolOptions` to `CorePlugin`

## Migration Guide

The `LogSettings` settings have been moved from a resource to `LogPlugin` configuration:

```rust
// Old (Bevy 0.8)
app
  .insert_resource(LogSettings {
    level: Level::DEBUG,
    filter: "wgpu=error,bevy_render=info,bevy_ecs=trace".to_string(),
  })
  .add_plugins(DefaultPlugins)

// New (Bevy 0.9)
app.add_plugins(DefaultPlugins.set(LogPlugin {
    level: Level::DEBUG,
    filter: "wgpu=error,bevy_render=info,bevy_ecs=trace".to_string(),
}))
```


The `ImageSettings` settings have been moved from a resource to `ImagePlugin` configuration:

```rust
// Old (Bevy 0.8)
app
  .insert_resource(ImageSettings::default_nearest())
  .add_plugins(DefaultPlugins)

// New (Bevy 0.9)
app.add_plugins(DefaultPlugins.set(ImagePlugin::default_nearest()))
```


The `DefaultTaskPoolOptions` settings have been moved from a resource to `CorePlugin::task_pool_options`:

```rust
// Old (Bevy 0.8)
app
  .insert_resource(DefaultTaskPoolOptions::with_num_threads(4))
  .add_plugins(DefaultPlugins)

// New (Bevy 0.9)
app.add_plugins(DefaultPlugins.set(CorePlugin {
  task_pool_options: TaskPoolOptions::with_num_threads(4),
}))
```
2022-10-25 22:19:34 +00:00

32 lines
1.3 KiB
Rust

//! This example illustrates how to use logs in bevy.
use bevy::prelude::*;
fn main() {
App::new()
.add_plugins(DefaultPlugins.set(bevy::log::LogPlugin {
// Uncomment this to override the default log settings:
// level: bevy::log::Level::TRACE,
// filter: "wgpu=warn,bevy_ecs=info".to_string(),
..default()
}))
.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 setting up the LogPlugin
// 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
}