This is an unexciting but robust event handler and action system for Unity3d.

class DummyCompletionEvent
{
  public bool Complete;
}

class DummyAction
{
  private EventHandler _events = new EventHandler();

  public void Execute()
  {
    _events.Trigger(new DummyCompletionEvent { Complete = true });
    _events.ClearEventHandlers<DummyCompletionEvent>();
  }

  public DummyAction OnComplete(Action<DummyCompletionEvent> handler)
  {
    _events.AddEventHandler(handler);
    return this;
  }
}

...
 
new DummyAction().OnComplete((ep) => { ... }).Execute();

The EventHandler type is a light weight interface that can be attached to objects with relatively low cost.

The extension methods TriggerDeferred and TriggerAsync support deferred event dispatch for interactive events, etc.

From your unity project folder:

npm init
npm install shadowmint/unity-n-events --save
echo Assets/pkg-all >> .gitignore
echo Assets/pkg-all.meta >> .gitignore

The package and all its dependencies will be installed in your Assets/pkg-all folder.

cd test
npm install

Remember that changes made to the test folder are not saved to the package unless they are copied back into the source folder.

To reinstall the files from the src folder, run npm install .. again.

All tests are located in the tests folder.