From 9a4af87669e43d5e7583a73e718f0c5e04718e86 Mon Sep 17 00:00:00 2001
From: Hatter Jiang <jht5945@gmail.com>
Date: Sun, 8 Nov 2020 19:38:17 +0800
Subject: [PATCH] chore: use less mut variable

---
 src/main.rs | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index eb6211a..92cb136 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -54,9 +54,8 @@ fn main() {
     }));
     let keep_running_config = opt_value!(parse_keep_running_config());
 
-    let mut the_file_lock = None;
-    if let Some(ref lock_file) = keep_running_config.lock_file {
-        the_file_lock = match FileLock::lock(lock_file, false, true) {
+    let the_file_lock = if let Some(ref lock_file) = keep_running_config.lock_file {
+        match FileLock::lock(lock_file, false, true) {
             Ok(lock) => {
                 info!("Lock file success: {}", lock_file);
                 Some(lock)
@@ -65,8 +64,8 @@ fn main() {
                 warn!("Lock file failed: {}", lock_file);
                 return;
             },
-        };
-    }
+        }
+    } else { None };
 
     init_logger();