How to not run sidecar http service when running in dev mode, like yarn tauri dev?

[djeikyb]

I'm bundling an http service as a sidecar. During local development, I don't need the sidecar to run.

Right now I've got:

fn main() {
    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![get_port])
        .setup(|app| {
            let window = app.get_window("main").unwrap();
            tauri::async_runtime::spawn(async move {
                let (mut rx, mut child) = Command::new_sidecar("http-api")
                    .expect("failed to setup `http-api` sidecar")
                    .spawn()
                    .expect("Failed to spawn packaged node");
            });

            Ok(())
        })
        .plugin(tauri_plugin_log::Builder::default().targets([
            LogTarget::LogDir,
            LogTarget::Stdout,
            LogTarget::Webview,
        ]).build())
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

Is there a way to say instead "if release mode" or "if not development mode"?

        .setup(|app| {

if (tauri::is_release_mode()) {
            let window = app.get_window("main").unwrap();
            tauri::async_runtime::spawn(async move {
                let (mut rx, mut child) = Command::new_sidecar("http-api")
                    .expect("failed to setup `http-api` sidecar")
                    .spawn()
                    .expect("Failed to spawn packaged node");
            });

            Ok(())
        })
}

[FabianLars]

you can check for the dev cfg flag like this for example:

fn main() {
    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![get_port])
        .setup(|app| {
            let window = app.get_window("main").unwrap();
            #[cfg(not(dev))]
            tauri::async_runtime::spawn(async move {
                let (mut rx, mut child) = Command::new_sidecar("http-api")
                    .expect("failed to setup `http-api` sidecar")
                    .spawn()
                    .expect("Failed to spawn packaged node");
            });

            Ok(())
        })
        .plugin(tauri_plugin_log::Builder::default().targets([
            LogTarget::LogDir,
            LogTarget::Stdout,
            LogTarget::Webview,
        ]).build())
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

the dev cfg is an alias for the custom-protocol feature flag you see in your Cargo.toml file.

[djeikyb]

Thanks! It weirded me out not seeing some kind of if statement, but this example/doc cleared things up!

[FabianLars]

The advantage of this syntax over a simple if statement is that rust will remove the whole block of code while the code will still be compiled into the app when you use the if syntax. Doesn't really matter in this case, but once you have dev-only code it will matter :)

Edit: Oh, that was mentioned in your link too, sry...

[djeikyb]

Nah I appreciate stating outright the benefit of writing it like you suggested!