Which source file(s) contain the code that Godot 4 uses to upgrade projects from version 3 to version 4?
Not sure, but it doesn't really work. You can open the project, but none of the code is ported, and most of the materials and textures and stuff need to be redone.
I'd like to see it, even if it doesn't work. It may provides clues about what changes are needed when upgrading a project from v.3 to v.4.
Your posts and others have provided some info, but I'd like to see all of it in one place.
I saw this guy is doing tutorials on language changes for godot 4, starting with annotations. I subscribed.
https://github.com/godotengine/godot/pull/51950
