add MessageType#print

src/util_msg.rs

@@ -8,6 +8,7 @@ lazy_static! {
     static ref PRINT_MESSAGE_LOCK: Arc<Mutex<()>> = Arc::new(Mutex::new(()));
 }
 
+#[derive(Clone, Copy)]
 pub enum MessageType { INFO, OK, WARN, ERROR, DEBUG, }
 
 pub fn is_atty() -> bool {
@@ -59,6 +60,12 @@ pub fn print_message(mt: MessageType, message: &str) {
     }
 }
 
+impl MessageType {
+    pub fn print(&self, message: &str) {
+        print_message(*self, message);
+    }
+}
+
 pub fn flush_stdout() {
     io::stdout().flush().ok();
 }