Working Rhai REPL

ableos/src/arch/x86_64/interrupts.rs

@@ -90,6 +90,7 @@ extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStac
                         // Backspace
                         8 => {
                             WRITER.lock().backspace();
+                            KEYBUFF.lock().push(8_u8 as _);
                             // print!(" ");
                             // WRITER.lock().backspace();
                         }

ableos/src/scratchpad.rs

@@ -36,7 +36,7 @@ pub fn scratchpad() {
     */
     // interp();
 
-    // rhai_shell();
+    rhai_shell();
 }
 
 pub struct PciIO {}
@@ -94,16 +94,28 @@ impl ProcessMessage {
 */
 
 pub fn rhai_shell() {
-    let mut engine = rhai::Engine::new();
+    let engine = rhai::Engine::new();
+    let mut buf = String::new();
+    print!("> ");
 
-    let ret = engine.eval::<i64>("1 + 2");
+    loop {
+        match x86_64::instructions::interrupts::without_interrupts(|| KEYBUFF.lock().pop()) {
+            Some('\n') => {
+                match engine.eval::<rhai::Dynamic>(&buf) {
+                    Ok(o) => println!("{o}"),
+                    Err(e) => println!("Eval error: {e}"),
+                };
 
-    match ret {
-        Ok(x) => println!("{}", x),
-        Err(e) => println!("{}", e),
+                buf.clear();
+                print!("> ");
+            }
+            Some('\u{0008}') => {
+                buf.pop();
+            }
+            Some(chr) => buf.push(chr),
+            None => (),
+        }
     }
-
-    loop {}
 }
 lazy_static::lazy_static!(
     pub static ref KEYBUFF: spin::Mutex<Vec<char>> = spin::Mutex::new(