Set global script classes on Godot 4

[MateuSai]

Hi, in Godot 4, ProjectSettings.get_setting("_global_script_classes") returns nil. Seems like the equivalent is ProjectSettings.get_global_class_list(), however, I can't find a function to set the global class list. So, script extensions don't work on Godot 4 at the moment. If anyone finds a solution, please let me know.

[Qubus0]

So, the global classes are moved to .godot/global_script_class_cache.cfg in this pr godotengine/godot#70557
This pr here has a way to open them with ConfigFile, and it should be possible to save it with this as well godotengine/godot-docs#6632
I'm not sure if the game still needs to be restarted - would be nice if not, but I doubt it.

All that aside, if the ModLoader is installed by the developer, the global class method is not needed for script extensions, since all global classes are already added by the editor and included on export. This could only be an issue for the self setup.

[KANAjetzt]

This is the function we are talking about, right?

godot-mod-loader/addons/mod_loader/internal/script_extension.gd

Lines 113 to 132 in 19a7b7f

	# Reload all children classes of the vanilla class we just extended
	# Calling reload() the children of an extended class seems to allow them to be extended
	# e.g if B is a child class of A, reloading B after apply an extender of A allows extenders of B to properly extend B, taking A's extender(s) into account
	static func _reload_vanilla_child_classes_for(script: Script) -> void:
	if script == null:
	return
	var current_child_classes := []
	var actual_path: String = script.get_base_script().resource_path
	var classes: Array = ProjectSettings.get_setting("_global_script_classes")
	for _class in classes:
	if _class.path == actual_path:
	current_child_classes.push_back(_class)
	break
	for _class in current_child_classes:
	for child_class in classes:
	if child_class.base == _class.class:
	load(child_class.path).reload()

[MateuSai]

No, the problem is the setting the global classes since it seems there is no straightforward equivalent in Godot 4. In the function you mention I replaced the line 121 with var classes: Array = ProjectSettings.get_global_class_list().

But as Qubus0 said this is only a problem with the self setup. I got it working without changing the lines where the global classes are set, since the code is not being executed, I don't get any error

[ugackMiner53]

I was really struggling with this problem because most of the 4.x games that I want to mod require self setup, as the authors have no intention of making it moddable.

While it's a bad solution (and admittedly removes all support for non self-setup), I found that putting every single class into a single autoload, then prefixing every call to a class with that autoload (and also removing most typedefs) causes self setup to work again on Godot 4.

If anyone is curious about this, I can post more details, but it's really not a viable solution for the project as a whole. I just wanted to share after multiple hours of trying to get this project to work self-setup in Godot 4.x.

[KANAjetzt]

@ugackMiner53 What games are you modding?
Once we have the hook system running, I’d be happy to look into the self-setup. It would be useful to have some games to test.

[ugackMiner53]

@KANAjetzt Personally, I was doing testing on simple projects made by myself and friends (think Squash the Creeps) in order to prepare for modding actual games without builtin support, like Buckshot Roulette or similar. I'll upload a branch to my personal account with the changes I had to make to get self-setup working again with 4.x, but I don't know if it will be of any use.

[VladKost999]

Hi, in Godot 4, ProjectSettings.get_setting("_global_script_classes") returns nil. Seems like the equivalent is ProjectSettings.get_global_class_list(), however, I can't find a function to set the global class list. So, script extensions don't work on Godot 4 at the moment. If anyone finds a solution, please let me know.

Did you manage to solve the problem?