feat: working version with scopes.

addons/GodotDI/SceneInstantiatorExtensions.cs

@@ -0,0 +1,24 @@
+using System;
+using Godot;
+
+namespace GodotHostTest.GodotDI;
+
+public static class SceneInstantiatorExtensions
+{
+    /// <summary>
+    ///     Instantiate a packed scene, just like <see cref="PackedScene.Instantiate{T}" />, but also looks for a scope between
+    ///     the top level children and triggers the dependency injection mechanism when found.
+    /// </summary>
+    /// <param name="sceneInstantiator">The scene instantiator to use.</param>
+    /// <param name="packedScene">The packed scene to instantiate.</param>
+    /// <param name="onScopeCreated">
+    ///     An optional callback invoked once the scope has been created, but before instantiating the
+    ///     scene.
+    /// </param>
+    /// <returns>The created node, with its dependencies satisfied.</returns>
+    private static T Instantiate<T>(this ISceneInstantiator sceneInstantiator, PackedScene packedScene,
+        Delegate? onScopeCreated = null) where T : Node
+    {
+        return (T)sceneInstantiator.Instantiate(packedScene, onScopeCreated);
+    }
+}