From a4c5911603b4bb4a9f32bf62781e93e6b501d7f7 Mon Sep 17 00:00:00 2001
From: Jaroslaw Konik <konikjar@gmail.com>
Date: Fri, 9 May 2025 18:19:44 +0200
Subject: [PATCH] call rust from ruby

---
 .../rust_function_gets_called_from_script.rb    |  3 +++
 src/runtimes/ruby.rs                            | 17 ++++++++++++++---
 2 files changed, 17 insertions(+), 3 deletions(-)
 create mode 100644 assets/tests/ruby/rust_function_gets_called_from_script.rb

diff --git a/assets/tests/ruby/rust_function_gets_called_from_script.rb b/assets/tests/ruby/rust_function_gets_called_from_script.rb
new file mode 100644
index 0000000..fc70a31
--- /dev/null
+++ b/assets/tests/ruby/rust_function_gets_called_from_script.rb
@@ -0,0 +1,3 @@
+def test_func()
+  rust_func()
+end
diff --git a/src/runtimes/ruby.rs b/src/runtimes/ruby.rs
index bd1b9bd..7e808f3 100644
--- a/src/runtimes/ruby.rs
+++ b/src/runtimes/ruby.rs
@@ -10,6 +10,7 @@ use bevy::{
 };
 use magnus::{
     embed::{init, Cleanup},
+    function,
     prelude::*,
 };
 use serde::Deserialize;
@@ -93,8 +94,6 @@ impl Runtime for RubyRuntime {
         script: &Self::ScriptAsset,
         entity: bevy::prelude::Entity,
     ) -> Result<Self::ScriptData, crate::ScriptingError> {
-        // let engine =
-        //     RUBY_ENGINE.get_or_init(|| Mutex::new(RubyEngine(unsafe { magnus::embed::init() })));
         let ruby = magnus::Ruby::get().unwrap();
         ruby.eval::<magnus::value::Qnil>(&script.0);
         Ok(RubyScriptData)
@@ -114,7 +113,19 @@ impl Runtime for RubyRuntime {
             + Sync
             + 'static,
     ) -> Result<(), crate::ScriptingError> {
-        todo!()
+        let ruby = magnus::Ruby::get().unwrap();
+
+        unsafe extern "C" fn callback(val: magnus::Value) -> magnus::Value {
+            let ruby = magnus::Ruby::get().unwrap();
+            // f();
+            ruby.qnil().as_value()
+        }
+
+        ruby.define_global_function(
+            &name,
+            callback as unsafe extern "C" fn(magnus::Value) -> magnus::Value,
+        );
+        Ok(())
     }
 
     fn call_fn(