From 01b83996d1ecb4f531fa8a3560d6b99a076be5c1 Mon Sep 17 00:00:00 2001
From: jasmine <its.jassy@pm.me>
Date: Sat, 7 Jun 2025 15:05:59 +0800
Subject: [PATCH] add some basic inbuilt commands

---
 src/inbuilt.rs | 15 +++++++++++++++
 src/main.rs    |  9 +++++++--
 2 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 src/inbuilt.rs

diff --git a/src/inbuilt.rs b/src/inbuilt.rs
new file mode 100644
index 0000000..57d7b4a
--- /dev/null
+++ b/src/inbuilt.rs
@@ -0,0 +1,15 @@
+use std::env;
+
+pub fn cd(args: Vec<&str>) {
+    let path = args[0].to_string();
+    assert!(env::set_current_dir(&path).is_ok());
+}
+
+pub fn help() {
+    println!("This is an example help message")
+}
+
+pub fn exit() {
+    std::process::exit(0x0100)
+}
+
diff --git a/src/main.rs b/src/main.rs
index 60a9dd9..95d0ad1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -21,7 +21,12 @@ fn main() {
         let cmd = core::get_command(tokens.clone());
         let args = core::get_args(tokens);
 
-        // Execute command and argument.
-        core::execute(cmd, args);
+        // Execute inbuilt commands if supplied, otherwise execute command and argument.
+        match cmd {
+            "cd" => inbuilt::cd(args),
+            "help" => inbuilt::help(),
+            "exit" => inbuilt::exit(),
+            _ => core::execute(cmd, args),
+        }
     }
 }