mirror of
https://github.com/bevyengine/bevy
synced 2024-12-21 02:23:08 +00:00
99b4fb68cc
# Objective
The `custom_loop` example didn't replicate the `app.finish` /
`app.cleanup` calls from the default runner; I discovered this when
trying to troubleshoot why my application with a custom loop wasn't
calling its plugin finalizers, and realised that the upstream example
that I'd referenced didn't have the relevant calls.
## Solution
Added the missing calls, replicating what the default runner does:
d390420093/crates/bevy_app/src/app.rs (L895-L896)
## Testing
I've confirmed that adding these two calls to my application fixed the
issue I was encountering. I haven't tested it within the example itself
as it's relatively straightforward and I didn't want to pollute the
example with a plugin using a finalizer.
49 lines
1.3 KiB
Rust
49 lines
1.3 KiB
Rust
//! This example demonstrates you can create a custom runner (to update an app manually). It reads
|
|
//! lines from stdin and prints them from within the ecs.
|
|
|
|
use bevy::{app::AppExit, prelude::*};
|
|
use std::io;
|
|
|
|
#[derive(Resource)]
|
|
struct Input(String);
|
|
|
|
fn my_runner(mut app: App) -> AppExit {
|
|
// Finalize plugin building, including running any necessary clean-up.
|
|
// This is normally completed by the default runner.
|
|
app.finish();
|
|
app.cleanup();
|
|
|
|
println!("Type stuff into the console");
|
|
for line in io::stdin().lines() {
|
|
{
|
|
let mut input = app.world_mut().resource_mut::<Input>();
|
|
input.0 = line.unwrap();
|
|
}
|
|
app.update();
|
|
|
|
if let Some(exit) = app.should_exit() {
|
|
return exit;
|
|
}
|
|
}
|
|
|
|
AppExit::Success
|
|
}
|
|
|
|
fn print_system(input: Res<Input>) {
|
|
println!("You typed: {}", input.0);
|
|
}
|
|
|
|
fn exit_system(input: Res<Input>, mut exit_event: EventWriter<AppExit>) {
|
|
if input.0 == "exit" {
|
|
exit_event.send(AppExit::Success);
|
|
}
|
|
}
|
|
|
|
// AppExit implements `Termination` so we can return it from main.
|
|
fn main() -> AppExit {
|
|
App::new()
|
|
.insert_resource(Input(String::new()))
|
|
.set_runner(my_runner)
|
|
.add_systems(Update, (print_system, exit_system))
|
|
.run()
|
|
}
|