Perhaps we'll use relm4 for audio?

applets/cosmic-applet-audio/Cargo.toml

@@ -7,7 +7,8 @@ license = "LGPL-3.0-or-later"
 [dependencies]
 futures-util = "0.3.21"
 gtk4 = "0.4.6"
-once_cell = "1.10.0"
-relm4-macros = "0.4.2"
-tokio = { version = "1.17.0", features = ["full"] }
 libcosmic-widgets = { git = "https://github.com/pop-os/libcosmic", branch = "lucy/widgets" }
+once_cell = "1.10.0"
+pulsectl-rs = "0.3.2"
+relm4 = { git = "https://github.com/AaronErhardt/relm4", branch = "new-approach", features = ["macros"] }
+tokio = { version = "1.17.0", features = ["full"] }

applets/cosmic-applet-audio/src/main.rs

@@ -1,3 +1,13 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+
+#[macro_use]
+extern crate relm4;
+
+use once_cell::sync::Lazy;
+use tokio::runtime::Runtime;
+
+static RT: Lazy<Runtime> = Lazy::new(|| Runtime::new().expect("failed to build tokio runtime"));
+
 fn main() {
     println!("Hello, world!");
 }