fix: add check for ddcutil

src/main.rs

@@ -7,7 +7,7 @@ use std::time::{Duration, UNIX_EPOCH};
 
 use hinoirisetr::notify::InitializedNotificationSystem;
 use hinoirisetr::time::Time;
-use hinoirisetr::{Config, apply_settings, compute_settings, debug, error, info, trace, warn};
+use hinoirisetr::{apply_settings, compute_settings, debug, error, info, trace, warn, Config, GammaBackend};
 use smol::Timer;
 use smol::channel::{Sender, unbounded};
 use smol::io::{AsyncBufReadExt, BufReader};
@@ -211,6 +211,29 @@ fn main() {
             Config::default()
         };
 
+
+        // TODO: add more temp backends and remove this
+        if !is_binary_available("hyprctl") {
+            error!("hyprctl is not available, exiting.");
+            std::process::exit(1);
+        }
+        
+        match cfg.gamma_backend {
+            GammaBackend::Hyprctl => {
+                if !is_binary_available("hyprctl") {
+                    error!("hyprctl is not available, exiting.");
+                    std::process::exit(1);
+                }
+            }
+            GammaBackend::Ddcutil => {
+                if !is_binary_available("ddcutil") {
+                    error!("ddcutil is not available, exiting.");
+                    std::process::exit(1);
+                }
+            }
+        }
+
+
         CONFIG.set(Arc::new(RwLock::new(cfg))).unwrap();
 
         if std::path::Path::new(SOCKET_PATH).exists() {