src/command/mod.rs

@@ -24,14 +24,9 @@ impl Builtin {
         let mut args = argv.clone();
         let program = args.remove(0);
 
-        let function = match program.as_str() {
-            "cd" => Some(builtins::cd),
-            _ => None,
-        };
-
-        if function.is_some() {
+        if program == "cd" {
             Ok(Self {
-                function: function.unwrap(),
+                function: builtins::cd,
                 args,
             })
         } else {

src/error.rs

@@ -1,9 +1,7 @@
-use std::env;
-use std::fmt::{Display, Formatter, Result};
 use std::path::Path;
 
 pub fn print_error(message: &str) {
-    let name = env::args().next().unwrap_or(String::from("rash"));
+    let name = std::env::args().next().unwrap();
     let name = Path::new(&name).file_name().unwrap().to_str().unwrap();
 
     eprintln!("{}: {}", name, message);