Call init_logger after parsing the args.

src/main.rs

@@ -5,7 +5,9 @@ extern crate watchexec;
 use watchexec::{cli, error, run};
 
 fn main() -> error::Result<()> {
-    run(cli::get_args()?)
+    let args = cli::get_args()?;
+    init_logger(args.debug);
+    run(args)
 }
 
 fn init_logger(debug: bool) {