Only watch if 'watch' passed as argument

build_src/main.rs

@@ -45,17 +45,19 @@ fn build() {
 }
 
 fn main() {
-    println!("Watching...\n");
+    build();
 
+    if matches!(std::env::args().nth(1).as_deref(), Some("watch")) {
         use notify::*;
 
         let (tx, rx) = std::sync::mpsc::channel();
 
         let mut watcher = watcher(tx, Duration::from_millis(100)).unwrap();
-    build();
-
         watcher.watch("./src", RecursiveMode::Recursive).unwrap();
 
+        println!();
+        log_info("Watching…\n");
+
         loop {
             match rx.recv() {
                 Ok(_) => build(),
@@ -63,3 +65,4 @@ fn main() {
             }
         }
     }
+}