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Make headless_defaults example actually headless #5261

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Make headless_defaults example actually headless #5261

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1263382
Make `headless_defaults` example actually headless
LegNeato Jul 9, 2022
7e2222d
Rename example system per review feedback
LegNeato Jul 9, 2022
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17 changes: 16 additions & 1 deletion examples/app/headless_defaults.rs
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Original file line number Diff line number Diff line change
@@ -1,14 +1,29 @@
//! An application that runs with default plugins, but without an actual renderer.
//! This can be very useful for integration tests or CI.

use bevy::{prelude::*, render::settings::WgpuSettings};
use bevy::{app::AppExit, prelude::*, render::settings::WgpuSettings, window::WindowSettings};

fn main() {
App::new()
.insert_resource(WgpuSettings {
backends: None,
..default()
})
.insert_resource(WindowSettings {
add_primary_window: false,
exit_on_all_closed: false,
..default()
})
.add_plugins(DefaultPlugins)
.add_system(exit_unconditionally)
.run();
}

// Normally Bevy exits when all windows are closed.
//
// When running in headless mode there are no windows so
// you must manually send an [`bevy::app::AppExit`] event.
fn exit_unconditionally(mut app_exit_events: EventWriter<AppExit>) {
info!("Successfully ran! Exiting...");
app_exit_events.send(AppExit);
}