refactor(main): improve command input handling loop

src/main.rs

@@ -1,13 +1,26 @@
-use std::{io::stdin, process::Command};
+use std::{io::{stdin, stdout, Write}, process::Command};
 
 fn main(){
+    loop {
+        // use the `>` character as the prompt
+        // need to explicitly flush this to ensure it prints before read_line
+        print!("> ");
+        stdout().flush();
+
         let mut input = String::new();
         stdin().read_line(&mut input).unwrap();
 
-    // read_line leaves a trailing newline, which trim removes
-    let command = input.trim(); 
+        let mut parts = input.trim().split_whitespace();
+        let command = parts.next().unwrap();
+        let args = parts;
 
-    Command::new(command)
+        let mut child = Command::new(command)
+            .args(args)
             .spawn()
             .unwrap();
+
+        // don't accept another command until this one completes
+        child.wait(); 
+    }
 }
+