694db96ab8
# Objective
- Fixes compile errors on headless example when running `cargo run
--example headless --no-default-features`
```
error[E0432]: unresolved import `bevy::log`
--> examples/app/headless.rs:13:39
|
13 | use bevy::{app::ScheduleRunnerPlugin, log::LogPlugin, prelude::*};
| ^^^ could not find `log` in `bevy`
For more information about this error, try `rustc --explain E0432`.
error: could not compile `bevy` (example "headless") due to 1 previous error
```
## Solution
- Since commit cc69fdd bevy_log has been identified as a separate
feature, thus requiring additional parameters to build headless example.
- Changed the command to run to: `cargo run --example headless
--no-default-features --features bevy_log`
## Testing
- The new command successfully builds the example
63 lines
2.0 KiB
Rust
63 lines
2.0 KiB
Rust
//! This example shows how to configure the `ScheduleRunnerPlugin` to run your
|
|
//! application without windowing. You can completely remove rendering / windowing
|
|
//! Plugin code from bevy by making your import look like this in your Cargo.toml.
|
|
//!
|
|
//! ```toml
|
|
//! [dependencies]
|
|
//! bevy = { version = "*", default-features = false }
|
|
//! # replace "*" with the most recent version of bevy
|
|
//! ```
|
|
//!
|
|
//! And then enabling the features you need.
|
|
//! See the full list: <https://docs.rs/bevy/latest/bevy/#cargo-features>
|
|
use bevy::{app::ScheduleRunnerPlugin, log::LogPlugin, prelude::*};
|
|
use core::time::Duration;
|
|
|
|
fn main() {
|
|
if cfg!(feature = "bevy_window") {
|
|
println!("This example is running with the bevy_window feature enabled and will not run headless.");
|
|
println!("Disable the default features and rerun the example to run headless.");
|
|
println!("To do so, run:");
|
|
println!();
|
|
println!(" cargo run --example headless --no-default-features --features bevy_log");
|
|
return;
|
|
}
|
|
|
|
// This app runs once
|
|
App::new()
|
|
.add_plugins(DefaultPlugins.set(ScheduleRunnerPlugin::run_once()))
|
|
.add_systems(Update, hello_world_system)
|
|
.run();
|
|
|
|
// This app loops forever at 60 fps
|
|
App::new()
|
|
.add_plugins(
|
|
DefaultPlugins
|
|
.set(ScheduleRunnerPlugin::run_loop(Duration::from_secs_f64(
|
|
1.0 / 60.0,
|
|
)))
|
|
// The log and ctrl+c plugin can only be registered once globally,
|
|
// which means we need to disable it here, because it was already registered with the
|
|
// app that runs once.
|
|
.disable::<LogPlugin>(),
|
|
)
|
|
.add_systems(Update, counter)
|
|
.run();
|
|
}
|
|
|
|
fn hello_world_system() {
|
|
println!("hello world");
|
|
}
|
|
|
|
fn counter(mut state: Local<CounterState>) {
|
|
if state.count % 60 == 0 {
|
|
println!("{}", state.count);
|
|
}
|
|
state.count += 1;
|
|
}
|
|
|
|
#[derive(Default)]
|
|
struct CounterState {
|
|
count: u32,
|
|
}
|