Add basic directory listing & config reading

src/main.rs

@@ -1,4 +1,5 @@
 use serde::{Deserialize, Serialize};
+use std::error::Error;
 use std::{env, fs};
 
 #[derive(Debug, Serialize, Deserialize)]
@@ -20,10 +21,19 @@ fn main() {
     let conf : Config = serde_yaml::from_str(&conf_str)
         .expect("invalid config format");
     
-    
-    let input_paths = fs::read_dir(conf.input_path).unwrap();
-
-    for path in input_paths {
-        println!("{}", path.unwrap().path().display())
-    }
+    load_paths(&conf.input_path).unwrap();
+}
+
+fn load_paths(root_dir : &str) -> Result<(), Box<dyn Error>> {
+    let entries = fs::read_dir(root_dir)?;
+    
+    for entry in entries {
+        let entry = entry?;
+        let meta = entry.metadata()?;
+        if meta.is_file() {
+            println!("{}", entry.path().display());
+        }
+    }
+    
+    Ok(())
 }