Simplify watch loop

build_src/main.rs

@@ -74,11 +74,8 @@ fn main() {
         let mut watcher = watcher(tx, Duration::from_millis(100)).unwrap();
         watcher.watch("./src", RecursiveMode::Recursive).unwrap();
 
-        loop {
+        while rx.recv().is_ok() {
-            match rx.recv() {
+            build()
-                Ok(_) => build(),
-                Err(_) => break,
-            }
         }
     }
 }