Warning about server features on every startup

[clayjohn]

Tested versions

Current master 56a7dba

System information

Godot v4.4.dev (5ea9e8b26) - Pop!_OS 22.04 LTS on X11 - X11 display driver, Multi-window, 1 monitor - OpenGL 3 (Compatibility) - Mesa Intel(R) Xe Graphics (TGL GT2) - 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz (8 threads)

Issue description

The following warning is printed whenever you run Godot in a debug build with --verbose:

WARNING: Server features cannot be checked before RenderingServer has been created. If you are checking a server feature, consider moving your OS::has_feature call after INITIALIZATION_LEVEL_SERVERS.
     at: has_feature (core/os/os.cpp:544)

Introduced by #98862

Here is the relevant code:

before

if (has_server_feature_callback && has_server_feature_callback(p_feature)) {
	return true;
}

after

if (has_server_feature_callback) {
	return has_server_feature_callback(p_feature);
}
#ifdef DEBUG_ENABLED
else if (is_stdout_verbose()) {
	WARN_PRINT_ONCE("Server features cannot be checked before RenderingServer has been created. If you are checking a server feature, consider moving your OS::has_feature call after INITIALIZATION_LEVEL_SERVERS.");
}
#endif

Before if either has_server_feature_callback or has_server_feature_callback(p_feature) was false, the function would continue and check if (ProjectSettings::get_singleton()->has_custom_feature(p_feature)). With the new logic the warning is printed any time that has_server_feature_callback is false and the code returns early whenever has_server_feature_callback is true. I suspect that neither of those things are intended

CC @HuntJSparra

Steps to reproduce

Run Godot from the command line with --verbose and observe

Minimal reproduction project (MRP)

N/A

[clayjohn]

Also CCing @RandomShaper as he made the suggestion that led to this code #98862 (comment)

[HuntJSparra]

Sorry for the issue. I’ll write up a PR later today that fixes the early return and moves the warning until after all other checks.

If the check still fails to find the feature, it’ll print the warning, regardless of if the call was originally intended to check a server feature or not. That could be annoy for people who really want 0 warnings in their console. So, another “fix” for this issue could be to remove the warning entirely. I don’t have a preference either way.