...

src/rhai/os.rs

@@ -35,6 +35,10 @@ pub fn register_os_module(engine: &mut Engine) -> Result<(), Box<EvalAltResult>>
     engine.register_fn("file_write", file_write);
     engine.register_fn("file_write_append", file_write_append);
     
+    // Register command check functions
+    engine.register_fn("which", which);
+    engine.register_fn("cmd_ensure_exists", cmd_ensure_exists);
+    
     // Register download functions
     engine.register_fn("download", download);
     engine.register_fn("download_install", download_install);
@@ -176,4 +180,19 @@ pub fn download(url: &str, dest: &str, min_size_kb: i64) -> Result<String, Box<E
 /// Download a file and install it if it's a supported package format.
 pub fn download_install(url: &str, min_size_kb: i64) -> Result<String, Box<EvalAltResult>> {
     os::download_install(url, min_size_kb).to_rhai_error()
+}
+
+/// Wrapper for os::which
+///
+/// Check if a command exists in the system PATH.
+pub fn which(command: &str) -> String {
+    os::which(command)
+}
+
+/// Wrapper for os::cmd_ensure_exists
+///
+/// Ensure that one or more commands exist in the system PATH.
+/// If any command doesn't exist, an error is thrown.
+pub fn cmd_ensure_exists(commands: &str) -> Result<String, Box<EvalAltResult>> {
+    os::cmd_ensure_exists(commands).to_rhai_error()
 }