Godot 4.4 beta 4 hot-reloading not working.

[chriztheanvill]

Godot version

Godot 4.4 beta 4

godot-cpp version

master

System information

Fedora Kinoite 41

Issue description

After compiling any part of the code, every public code to show in Godot gui, disappear.

In Cmake I tried this:

set(GODOT_COMPILE_FLAGS "${GODOT_COMPILE_FLAGS} -fno-omit-frame-pointer -O0 -DHOT_RELOAD_ENABLED -DDEBUG_ENABLED -DDEBUG_METHODS_ENABLED")

tried this:

set(GODOT_ENABLE_HOT_RELOAD ON CACHE INTERNAL "Enable hot reloading support")
set(GODOT_CPP_SYSTEM_HEADERS ON CACHE INTERNAL "Generate system headers")
#set(GODOT_CPP_WARNING_AS_ERROR OFF CACHE INTERNAL "Treat warnings as errors")
set(GENERATE_TEMPLATE_GET_NODE ON CACHE INTERNAL "Get template node")
set(FLOAT_PRECISION "${PRECISION}" CACHE INTERNAL "Library precision")
set(GODOT_CUSTOM_API_FILE "${EXTENSION_FILE}" CACHE INTERNAL "Extension api file")

and this.

reloadable = true

I tried this with 4.3 and 4.4 beta 1,2,3 and 4

Steps to reproduce

Launch Godot, edit some part of the code, compile and disappears every public code and not showing in godot GUI.

Before:

After:

Minimal reproduction project

Could happen with a new project.

[dsnopek]

Thanks for the report!

However, I'm not sure how much headway we'll be able to make without an MRP. I've relatively recently tested hot reload with Godot 4.3 and it was working, although, that was with scons. Based on your description it sounds like you're doing what you need to do for hot reload with cmake, but something must not be right if it works for me, but not for you.

Could you share which version of godot-cpp you're using?

We did at one point have an issue with the cmake configuration missing something needed for hot reload, but that should be fixed now.

[chriztheanvill]

I am using the master branch, I downloaded yesterday to test the godot beta 4.4.

Could you share your compile flags ?

[ghuser404]

The correct variable is GODOT_USE_HOT_RELOAD, not GODOT_ENABLE_HOT_RELOAD.

[chriztheanvill]

GODOT_USE_HOT_RELOAD

Mmm same result, not working. Also noticed that.

Before Compile:

• Then, edit any part of my code, no matter if is "Collectable".
• In Clion press the button to compile, but before finish, switch to godot, the changes not showing.

• If I switch back to CLion, then back to godot, the info disappears.

[chriztheanvill]

[ghuser404]

If this still doesn't work, you will have to upload an example project for anyone to be able to help you with this issue.

[ghuser404]

In Clion press the button to compile, but before finish, switch to godot, the changes not showing.

Godot editor reloads GDExtension only on focus, i.e. if you open the editor before the compilation finishes, and compilation finishes when you're in the editor, you will not see the changes. You have to re-focus the editor. I opened an issue for that a while ago godotengine/godot-proposals#11684

[ghuser404]

If I switch back to CLion, then back to godot, the info disappears.

This means your hot reload is working. I'm not very sure what your issue is right now.

[chriztheanvill]

If I switch back to CLion, then back to godot, the info disappears.

This means your hot reload is working. I'm not very sure what your issue is right now.

For example, at start I set the Lv of the collectable:

// header
private:
int m_lv { };

public:
auto GetLv( ) const -> int;
auto SetLv(int val) -> void;

// Source
ClassDB::bind_method(D_METHOD("GetLv"), &Collectable::GetLv);
ClassDB::bind_method(D_METHOD("SetLv", "val"), &Collectable::SetLv);
ClassDB::add_property("Collectable", PropertyInfo(Variant::INT, "lv"), "SetLv", "GetLv");

Compile and shows the info in godot, perfect.

Then I want to work with this class, Adding methods, working with the process method, or just add other attribute,

// header
private:
int m_lv { };
bool m_isActive {}; // <--- Just an example

Or If I edit any part of the project, for example, the player.cpp file. The Lv info that showed in Godot, disappear.

Edit: The cmake file, is a mess, because I am trying many things.

CMakeLists.txt
conanfile.txt

[ghuser404]

Upload all project sources, not just those 2 files. Create a small example project, if you don't want to share your sources.

[ghuser404]

The problem is that your node becomes just Area2D instead of your class. I can't tell you the reason for that without seeing sources.

[chriztheanvill]

The problem is that your node becomes just Area2D instead of your class. I can't tell you the reason for that without seeing sources.

I am making a new project.

The problem is that your node becomes just Area2D instead of your class.

I don't get it.

class Collectable : public Area2D, public IObject {
	GDCLASS(Collectable, Area2D)