Get rom path from cli args

src/main.rs

@@ -4,8 +4,14 @@ use std::fs::File;
 use std::io::Read;
 
 fn main() {
-    let mut f = File::open("basic.bin").expect("File not found");
-    let metadata = fs::metadata("basic.bin").expect("Could not load metadata");
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() < 2 {
+        panic!("Please provide a path to the rom")
+    }
+
+    let rom_path = &args[1];
+    let mut f = File::open(rom_path).expect("File not found");
+    let metadata = fs::metadata(rom_path).expect("Could not load metadata");
     let bytes = metadata.len();
     let mut buffer = vec![0; bytes as usize];
     let bytes_read = f.read(&mut buffer).expect("Problem reading file into buffer");