GodotOnReady is a C# Source Generator that adds convenient onready-like features to your C# scripts in Godot Mono without any reflection.

• [OnReadyGet] - Load a Node or Resource subclass into a field or property. Automatically exports a property so you can use the Godot editor to configure the path it loads.
• [OnReady] - Execute any 0-argument method during _Ready.

Bonus feature:

• [GenerateDataSelectorEnum] - Generate an enum where each value is strongly associated with custom data.

• Godot 3.2.3 or greater (Mono version) (3.3+ recommended)
  https://godotengine.org/download

• .NET SDK 5.0 or greater
  https://dotnet.microsoft.com/download

• Set Godot to use the dotnet CLI Build Tool

  Screenshot showing this editor setting (click me!)

  

Just add the GodotOnReady NuGet package to your project! GodotOnReady adds two components: a C# library with a few attributes, and a source generator that detects those attributes and generates code.

Your Godot project's .csproj file should look like this when you're done:

<Project Sdk="Godot.NET.Sdk/3.3.0">
  <PropertyGroup>
    <TargetFramework>net472</TargetFramework>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="GodotOnReady" Version="1.1.1" />
  </ItemGroup>
</Project>

You may need to restart your IDE to navigate to generated sources and for the generated code to show up in code completion/intellisense.

For advanced alternatives like building from source or avoiding a reference to GodotOnReady.Attributes, see /docs/advanced-setup.md.

Instead of writing this repetitive code:

public class MyControl : Control
{
  [Export] public NodePath ButtonPath { get; set; }
  private Button _button;

  public override void _Ready()
  {
    _button = GetNode<Button>(ButtonPath);
  }
}

Write this code instead to do the same thing:

public partial class MyControl : Control
{
  [OnReadyGet] private Button _button;
}

The source generator figures out that the exported property should be called ButtonPath by taking _button, trimming the leading _ character, and capitalizing the first letter.

The [OnReadyGet] source generator works for fields and properties. It also works for Resource subclasses like PackedScene and Texture.

If you pass a string to the attribute, it's used as the node path to get. The [Export] ButtonPath property isn't generated. This is useful if you know the node will always be at a certain path, and avoids cluttering the Godot editor with exported properties you'll never use:

[OnReadyGet("My/Button/Somewhere")] private Button _button;

If you know the node will usually be at one path, but someone may need to tweak it in the Godot editor to point somewhere else, set Export = true. This sets the string as the default path, and also exports ButtonPath for tweaking in a scene:

[OnReadyGet("My/Button/Somewhere", Export = true)] private Button _button;

To get a node if it exists and ignore issues, pass OrNull = true. This means GodotOnReady does nothing if the the path is null, empty, invalid, or points at the wrong type of node. Normally, it throws an exception in these cases.

If you use OrNull = true, the _button member may be null, so be sure to check before using it!

[OnReadyGet("My/Button/Maybe", OrNull = true)] private Button _button;

If your property is a Resource rather than a Node, pass a resource path instead of a node path:

[OnReadyGet("res://icon.png")] private Texture _tex;

To get a property of a node instead of getting the node itself, specify Property = "...". GodotOnReady will cast the result for you, so this is particularly useful for properties that aren't exposed in the statically-typed Godot C# API.

For example, you can get an animation tree playback object without calling .Get("...") and casting the result yourself:

[OnReadyGet("AnimationTree", Property = "parameters/playback")]
private AnimationNodeStateMachinePlayback _playback;

Using OnReadyGet causes GodotOnReady to generate a public override void _Ready() method. This means you can't define _Ready() yourself. To run your own code during _Ready, mark any number of zero-argument methods with [OnReady]:

[OnReadyGet] private Button _button;
[OnReady] private void ConnectButtonOnReady()
{
  _button.Connect("pressed", this, nameof(ButtonPressed));
}

The generated _Ready() method will then be:

public override void _Ready()
{
  _button = GetNode<Button>(ButtonPath);
  ConnectButtonOnReady();
}

There is only one argument, Order. It lets you change the sort order for OnReady methods. The default is 0.

OnReady calls are sorted with this priority:

• (1) Order, from low to high.
• (2) Declaration order in the class file.

All OnReadyGet members are initialized between the last Order=-1 method and the first Order=0 method.

When you use [OnReadyGet], you can't write public override void _Ready() in your own code, because GodotOnReady generated it already. To run your own code in the generated _Ready() method, use [OnReady].

Your class is most likely missing the partial modifier. The declaration should look like this:

public partial class MyNode : Node

First, hit the Build button at the top-right of the Godot editor to make sure your build is up to date. That might make the properties show up.

Then, make sure you are using .NET SDK version 5.0 or newer. If you run dotnet --version in a console window, it will show you what version of the SDK you have.

If that doesn't work, please file an issue. Include the output of dotnet --info, the Godot build log, and if possible, the project.

GodotOnReady is licensed under the MIT license.