add walkdir

walkdir/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "walkdir"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+walkdir = "2.3.1"

walkdir/src/main.rs

@@ -0,0 +1,13 @@
+use walkdir::WalkDir;
+
+fn main() {
+    for entry in WalkDir::new(".") {
+        match entry {
+            Ok(en) => { 
+                let is_dir = en.path().is_dir();
+                println!("-- {} {}", en.path().display(), if is_dir { "[DIR]" } else { "" });
+            },
+            Err(er) => println!("[ERROR] {}", er),
+        }
+    }
+}