fix clippy

src/util_file.rs

@@ -82,11 +82,8 @@ fn walk_dir_with_depth_check<FError, FProcess, FFilter>(depth: &mut u32, dir: &P
         } else if sub_dir.is_dir() {
             if func_filter_dir(&sub_dir) {
                 *depth += 1;
-                match walk_dir_with_depth_check(depth, &sub_dir, func_walk_error, func_process_file, func_filter_dir) {
-                    Err(err) => {
-                        func_walk_error(&sub_dir, err);
-                    },
-                    Ok(_) => (),
+                if let Err(err) = walk_dir_with_depth_check(depth, &sub_dir, func_walk_error, func_process_file, func_filter_dir) {
+                    func_walk_error(&sub_dir, err);
                 }
                 *depth -= 1;
             }

src/util_msg.rs

@@ -15,20 +15,18 @@ pub fn is_atty() -> bool{
 
 pub fn print_color(color: Option<term::color::Color>, is_bold: bool, m: &str) {
     let mut t = term::stdout().unwrap();
-    match *IS_ATTY {
-        true => {
-            match color {
-                Some(c) => t.fg(c).unwrap(),
-                None => (),
-            }
-            if is_bold {
-                t.attr(term::Attr::Bold).unwrap();
-            }
-            write!(t, "{}", m).unwrap();
-            t.reset().unwrap();
-        },
-        false => write!(t, "{}", m).unwrap(),
-    };
+    if *IS_ATTY {
+        if let Some(c) = color {
+            t.fg(c).unwrap();
+        }
+        if is_bold {
+            t.attr(term::Attr::Bold).unwrap();
+        }
+        write!(t, "{}", m).unwrap();
+        t.reset().unwrap();
+    } else {
+        write!(t, "{}", m).unwrap();
+    }
 }
 
 pub fn print_color_and_flush(color: Option<term::color::Color>, is_bold: bool, m: &str) {

src/util_os.rs

@@ -1,18 +1,10 @@
 
 pub fn is_macos() -> bool {
-    if cfg!(target_os = "macos") {
-        true
-    } else {
-        false
-    }
+    cfg!(target_os = "macos")
 }
 
 pub fn is_linux() -> bool {
-    if cfg!(target_os = "linux") {
-        true
-    } else {
-        false
-    }
+    cfg!(target_os = "linux")
 }
 
 pub fn is_macos_or_linux() -> bool {