dioxus-mirror/packages/dioxus/build.rs

fn main() {
	// Warn the user if they enabled the launch feature without any renderers
    if feature_enabled("launch") {
		if feature_enabled("third-party-renderer"){
			return;
		}

		let liveview_renderers = [
			"liveview",
			"axum",
			"salvo",
			"warp",
			"rocket",
		];
		let fullstack_renderers = [
			"axum",
			"salvo",
			"warp",
		];
		let client_renderers = [
			"desktop",
			"mobile",
			"web",
			"tui",
		];
		let client_renderer_selected = client_renderers.iter().any(|renderer| feature_enabled(renderer));
		if feature_enabled("fullstack") {
			let server_fullstack_enabled = fullstack_renderers.iter().any(|renderer| feature_enabled(renderer));
			if !server_fullstack_enabled && !client_renderer_selected {
				println!("cargo:warning=You have enabled the launch and fullstack features, but have not enabled any renderers. The application will not be able to launch. Try enabling one of the following renderers: {} for the server or one of the following renderers: {} for the client.", fullstack_renderers.join(", "), client_renderers.join(", "));
			}
		}

		if feature_enabled("liveview") {
			let server_selected = liveview_renderers.iter().any(|renderer| feature_enabled(renderer));
			if !server_selected {
				println!("cargo:warning=You have enabled the launch and liveview features, but have not enabled any liveview renderers. The application will not be able to launch. Try enabling one of the following renderers: {}", liveview_renderers.join(", "));
			}
		}

		if !client_renderer_selected {
			println!("cargo:warning=You have enabled the launch feature, but have not enabled any client renderers. The application will not be able to launch. Try enabling one of the following renderers: {}, fullstack or liveview", client_renderers.join(", "));
		}
    }
}

fn feature_enabled(feature: &str) -> bool {
	let feature = "CARGO_FEATURE_".to_owned() + &feature.to_uppercase().replace("-", "_");
	println!("cargo:rerun-if-env-changed={}", feature);
	std::env::var(feature).is_ok()
}