Process multiple files at a time

src/main.rs

@@ -5,6 +5,20 @@ use std::env;
 use std::fs;
 use std::process;
 
+fn apply_renames(filename: &String, renames: &HashMap<String, String>) -> Result<()> {
+    let mut outputs = Vec::new();
+
+    let pls_file = File::open(filename)?;
+    for entry in BufReader::new(pls_file).lines() {
+        let entry = entry?;
+        let new = renames.get(&entry).unwrap_or(&entry).to_string();
+        outputs.push(new);
+    }
+    let data = outputs.join("\n");
+    fs::write(filename, data).expect("unable to write");
+    Ok(())
+}
+
 fn main() -> Result<()> {
     let args: Vec<String> = env::args().collect();
 
@@ -14,8 +28,6 @@ fn main() -> Result<()> {
     }
 
     let rename_file = &args[1];
-    let playlist_file = &args[2];
-    println!("{:?}", rename_file);
 
     let file = File::open(rename_file)?;
     let mut renames = HashMap::new();
@@ -24,24 +36,16 @@ fn main() -> Result<()> {
         let split: Vec<&str> = line.split("\t\t").collect();
         renames.insert(split[0].to_string(), split[1].to_string());
     }
-    
-    let mut outputs = Vec::new();
-
-    let pls_file = File::open(playlist_file)?;
-    for entry in BufReader::new(pls_file).lines() {
-        let entry = entry?;
-        let new = renames.get(&entry).unwrap_or(&entry).to_string();
+    for r in &args[2..] {
+        try!(apply_renames(&r, &renames));
         /*
-        if new != &entry {
-            println!("renamed “{}” to “{}”", entry, new);
-        } else {
-            println!("“{}” remains unchanged", entry);
-        }
+        match apply_renames(&r, &renames) {
+            Ok(()) => println!("Successfully processed renames for {}", r)
+        },
+        _ => println!("Error processing {}", r);
         */
-        outputs.push(new);
     }
-    let data = outputs.join("\n");
-    fs::write("playlist2.m3u", data).expect("unable to write");
+    
    Ok(())
 }