Merge pull request godotengine#39 from paddy-exe/update-godot-4.3

Update to 4.3 and support for GDExtension docs system

Author: paddy-exe

README.md

@@ -8,6 +8,7 @@ This repository serves as a quickstart template for GDExtension development with
 * GitHub CI/CD workflows to publish your library packages when creating a release (`.github/workflows/builds.yml`)
 * GitHub CI/CD actions to build (`.github/actions/build/action.yml`) and to sign Mac frameworks (`.github/actions/build/sign.yml`).
 * preconfigured source files for C++ development of the GDExtension (`src/`)
+* setup to automatically generate `.xml` files in a `doc_classes/` directory to be parsed by Godot as [GDExtension built-in documentation](https://docs.godotengine.org/en/stable/tutorials/scripting/gdextension/gdextension_docs_system.html)
 
 ## Usage - Template
 

SConstruct

@@ -53,6 +53,13 @@ env = SConscript("godot-cpp/SConstruct", {"env": env, "customs": customs})
 env.Append(CPPPATH=["src/"])
 sources = Glob("src/*.cpp")
 
+if env["target"] in ["editor", "template_debug"]:
+    try:
+        doc_data = env.GodotCPPDocData("src/gen/doc_data.gen.cpp", source=Glob("doc_classes/*.xml"))
+        sources.append(doc_data)
+    except AttributeError:
+        print("Not including class reference as we're targeting a pre-4.3 baseline.")
+
 file = "{}{}{}".format(libname, env["suffix"], env["SHLIBSUFFIX"])
 
 if env["platform"] == "macos" or env["platform"] == "ios":