fix: add check for no backends

src/lib.rs

@@ -30,7 +30,7 @@ pub struct Config {
     pub temp_backend: TempBackend,
 }
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, PartialEq, Copy, Clone)]
 pub enum GammaBackend {
     Hyprctl,
     Ddcutil,
@@ -40,7 +40,7 @@ pub enum GammaBackend {
     None,
 }
 
-#[derive(Debug, Copy, Clone)]
+#[derive(Debug, PartialEq, Copy, Clone)]
 pub enum TempBackend {
     Hyprctl,
     Redshift,

src/main.rs

@@ -237,6 +237,11 @@ async fn main() {
         TempBackend::None => {}
     }
 
+    if cfg.temp_backend == TempBackend::None && cfg.gamma_backend == GammaBackend::None {
+        error!("No backends selected, exiting.");
+        std::process::exit(1);
+    }
+
     CONFIG.set(Arc::new(RwLock::new(cfg))).unwrap();
 
     if std::path::Path::new(SOCKET_PATH).exists() {