Rename godot-headers to gdextension, move header to top folder

Changes the `<godot/gdextension_interface.h>` include to simply
`<gdextension_interface.h>`.

Refactor and better document the SCons and CMake logic around setting
the paths to the header and API JSON file.

CMakeLists.txt

@@ -2,8 +2,8 @@
 # CMAKE_BUILD_TYPE:			Compilation target (Debug or Release defaults to Debug)
 #
 # godot-cpp cmake arguments
-# GODOT_HEADERS_DIR:		Custom include path for the GDExtension. It should include interface header at this subpath: godot/gdextension_interface.h
+# GODOT_GDEXTENSION_DIR:	Path to the directory containing GDExtension interface header and API JSON file
-# GODOT_CUSTOM_API_FILE:	Custom path for extension_api.json
+# GODOT_CUSTOM_API_FILE:	Path to a custom GDExtension API JSON file (takes precedence over `gdextension_dir`)
 # FLOAT_TYPE				Floating-point precision (32, 64)
 #
 # Android cmake arguments
@@ -57,9 +57,14 @@ if(NOT DEFINED BITS)
 	endif(CMAKE_SIZEOF_VOID_P EQUAL 8)
 endif()
 
-# Input from user for godot headers and the api file
+# Input from user for GDExtension interface header and the API JSON file
-set(GODOT_HEADERS_DIR "godot-headers" CACHE STRING "")
+set(GODOT_GDEXTENSION_DIR "gdextension" CACHE STRING "")
-set(GODOT_CUSTOM_API_FILE "godot-headers/extension_api.json" CACHE STRING "")
+set(GODOT_CUSTOM_API_FILE "" CACHE STRING "")
+
+set(GODOT_GDEXTENSION_API_FILE "${GODOT_GDEXTENSION_DIR}/extension_api.json")
+if (NOT "${GODOT_CUSTOM_API_FILE}" STREQUAL "")  # User-defined override.
+	set(GODOT_GDEXTENSION_API_FILE "${GODOT_CUSTOM_API_FILE}")
+endif()
 
 set(GODOT_COMPILE_FLAGS )
 set(GODOT_LINKER_FLAGS )
@@ -125,16 +130,16 @@ else()
 	set(GENERATE_BINDING_PARAMETERS "False")
 endif()
 
-execute_process(COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.print_file_list(\"${GODOT_CUSTOM_API_FILE}\", \"${CMAKE_CURRENT_BINARY_DIR}\", headers=True, sources=True)"
+execute_process(COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.print_file_list(\"${GODOT_GDEXTENSION_API_FILE}\", \"${CMAKE_CURRENT_BINARY_DIR}\", headers=True, sources=True)"
 	WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
 	OUTPUT_VARIABLE GENERATED_FILES_LIST
 )
 
 add_custom_command(OUTPUT ${GENERATED_FILES_LIST}
-		COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.generate_bindings(\"${GODOT_CUSTOM_API_FILE}\", \"${GENERATE_BINDING_PARAMETERS}\", \"${BITS}\", \"${FLOAT_TYPE_FLAG}\", \"${CMAKE_CURRENT_BINARY_DIR}\")"
+		COMMAND "${Python3_EXECUTABLE}" "-c" "import binding_generator; binding_generator.generate_bindings(\"${GODOT_GDEXTENSION_API_FILE}\", \"${GENERATE_BINDING_PARAMETERS}\", \"${BITS}\", \"${FLOAT_TYPE_FLAG}\", \"${CMAKE_CURRENT_BINARY_DIR}\")"
 		VERBATIM
 		WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-		MAIN_DEPENDENCY ${GODOT_CUSTOM_API_FILE}
+		MAIN_DEPENDENCY ${GODOT_GDEXTENSION_API_FILE}
 		DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/binding_generator.py
 		COMMENT "Generating bindings"
 )
@@ -173,7 +178,7 @@ target_include_directories(${PROJECT_NAME} PUBLIC
 # Put godot headers as SYSTEM PUBLIC to exclude warnings from irrelevant headers
 target_include_directories(${PROJECT_NAME}
 	SYSTEM PUBLIC
-	${GODOT_HEADERS_DIR}
+	${GODOT_GDEXTENSION_DIR}
 )
 
 # Add the compile flags

README.md

@@ -24,10 +24,9 @@ Stable releases are also tagged on this repository:
 this repository as a Git submodule, checking out the specific tag matching your
 Godot version.**
 
-> As the `master` and `3.x` branches are constantly getting updates, if you are
+> As the `master` branch of Godot is constantly getting updated, if you are
 > using `godot-cpp` against a more current version of Godot, see the instructions
-> in [**godot-headers**](https://github.com/godotengine/godot-headers) for
+> in the `gdextension` folder to update the relevant files.
-> updating the relevant files.
 
 ## Contributing
 

SConstruct

@@ -77,10 +77,20 @@ opts.Add(
 )
 opts.Add(
     PathVariable(
-        "headers_dir", "Path to the directory containing Godot headers", "godot-headers", PathVariable.PathIsDir
+        "gdextension_dir",
+        "Path to the directory containing GDExtension interface header and API JSON file",
+        "gdextension",
+        PathVariable.PathIsDir,
+    )
+)
+opts.Add(
+    PathVariable(
+        "custom_api_file",
+        "Path to a custom GDExtension API JSON file (takes precedence over `gdextension_dir`)",
+        None,
+        PathVariable.PathIsFile,
     )
 )
-opts.Add(PathVariable("custom_api_file", "Path to a custom JSON API file", None, PathVariable.PathIsFile))
 opts.Add(
     BoolVariable("generate_bindings", "Force GDExtension API bindings generation. Auto-detected by default.", False)
 )
@@ -179,11 +189,11 @@ json_api_file = ""
 if "custom_api_file" in env:
     json_api_file = env["custom_api_file"]
 else:
-    json_api_file = os.path.join(os.getcwd(), env["headers_dir"], "extension_api.json")
+    json_api_file = os.path.join(os.getcwd(), env["gdextension_dir"], "extension_api.json")
 
 bindings = env.GenerateBindings(
     env.Dir("."),
-    [json_api_file, os.path.join(env["headers_dir"], "godot", "gdextension_interface.h"), "binding_generator.py"],
+    [json_api_file, os.path.join(env["gdextension_dir"], "gdextension_interface.h"), "binding_generator.py"],
 )
 
 scons_cache_path = os.environ.get("SCONS_CACHE")
@@ -197,7 +207,7 @@ if env["generate_bindings"]:
     NoCache(bindings)
 
 # Includes
-env.Append(CPPPATH=[[env.Dir(d) for d in [env["headers_dir"], "include", os.path.join("gen", "include")]]])
+env.Append(CPPPATH=[[env.Dir(d) for d in [env["gdextension_dir"], "include", os.path.join("gen", "include")]]])
 
 # Sources to compile
 sources = []

binding_generator.py

@@ -377,7 +377,7 @@ def generate_builtin_class_header(builtin_api, size, used_classes, fully_used_cl
     if len(fully_used_classes) > 0:
         result.append("")
 
-    result.append(f"#include <godot/gdextension_interface.h>")
+    result.append(f"#include <gdextension_interface.h>")
     result.append("")
     result.append("namespace godot {")
     result.append("")

gdextension/README.md

@@ -0,0 +1,20 @@
+# GDExtension header and API
+
+This repository contains the C header and API JSON for
+[**Godot Engine**](https://github.com/godotengine/godot)'s *GDExtensions* API.
+
+## Updating header and API
+
+If the current branch is not up-to-date for your needs, or if you want to sync
+the header and API JSON with your own modified version of Godot, here is the
+update procedure used to sync this repository with upstream releases:
+
+- Compile [Godot Engine](https://github.com/godotengine/godot) at the specific
+  version/commit which you are using.
+  * Or if you use an official release, download that version of the Godot editor.
+- Use the compiled or downloaded executable to generate the `extension_api.json`
+  and `gdextension_interface.h` files with:
+
+```
+godot --dump-extension-api --dump-gdextension-interface
+```

godot-headers/README.md

@@ -1,16 +0,0 @@
-# godot-headers
-
-This repository contains C headers for
-[**Godot Engine**](https://github.com/godotengine/godot)'s *GDExtensions* API.
-
-## Updating Headers
-
-If the current branch is not up-to-date for your needs, or if you want to sync
-the headers with your own modified version of Godot, here is the update
-procedure used to sync this repository with upstream releases:
-
-- Compile [Godot Engine](https://github.com/godotengine/godot) at the specific
-  version/commit which you are using.
-- Use the compiled executable to generate the `extension_api.json` file with:
-  `godot --dump-extension-api extension_api.json`
-- Copy the file `core/extension/gdextension_interface.h` to `godot`

include/godot_cpp/core/binder_common.hpp

@@ -31,7 +31,7 @@
 #ifndef GODOT_BINDER_COMMON_HPP
 #define GODOT_BINDER_COMMON_HPP
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <godot_cpp/core/method_ptrcall.hpp>
 #include <godot_cpp/core/type_info.hpp>

include/godot_cpp/core/builtin_ptrcall.hpp

@@ -31,7 +31,7 @@
 #ifndef GODOT_BUILTIN_PTRCALL_HPP
 #define GODOT_BUILTIN_PTRCALL_HPP
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <array>
 

include/godot_cpp/core/class_db.hpp

@@ -31,7 +31,7 @@
 #ifndef GODOT_CLASS_DB_HPP
 #define GODOT_CLASS_DB_HPP
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <godot_cpp/core/defs.hpp>
 #include <godot_cpp/core/error_macros.hpp>

include/godot_cpp/core/engine_ptrcall.hpp

@@ -31,7 +31,7 @@
 #ifndef GODOT_ENGINE_PTRCALL_HPP
 #define GODOT_ENGINE_PTRCALL_HPP
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <godot_cpp/core/binder_common.hpp>
 #include <godot_cpp/core/object.hpp>

include/godot_cpp/core/math.hpp

@@ -33,7 +33,7 @@
 
 #include <godot_cpp/core/defs.hpp>
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <cmath>
 

include/godot_cpp/core/method_bind.hpp

@@ -36,7 +36,7 @@
 
 #include <godot_cpp/core/memory.hpp>
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <godot_cpp/classes/global_constants.hpp>
 

include/godot_cpp/core/object.hpp

@@ -41,7 +41,7 @@
 
 #include <godot_cpp/godot.hpp>
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <vector>
 

include/godot_cpp/core/property_info.hpp

@@ -39,7 +39,7 @@
 
 #include <godot_cpp/godot.hpp>
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 namespace godot {
 

include/godot_cpp/core/type_info.hpp

@@ -35,7 +35,7 @@
 #include <godot_cpp/variant/typed_array.hpp>
 #include <godot_cpp/variant/variant.hpp>
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 namespace godot {
 

include/godot_cpp/godot.hpp

@@ -31,7 +31,7 @@
 #ifndef GODOT_GODOT_HPP
 #define GODOT_GODOT_HPP
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 namespace godot {
 

include/godot_cpp/variant/variant.hpp

@@ -36,7 +36,7 @@
 #include <godot_cpp/variant/builtin_types.hpp>
 #include <godot_cpp/variant/variant_size.hpp>
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <array>
 

misc/scripts/check_get_file_list.py

@@ -8,7 +8,7 @@ sys.path.insert(1, os.path.join(os.path.dirname(__file__), "..", ".."))
 
 from binding_generator import get_file_list, generate_bindings
 
-api_filepath = "godot-headers/extension_api.json"
+api_filepath = "gdextension/extension_api.json"
 bits = "64"
 double = "float"
 output_dir = "self_test"

test/CMakeLists.txt

@@ -1,7 +1,7 @@
 project(godot-cpp-test)
 cmake_minimum_required(VERSION 3.6)
 
-set(GODOT_HEADERS_PATH ../godot-headers/ CACHE STRING "Path to Godot headers")
+set(GODOT_GDEXTENSION_DIR ../gdextension/ CACHE STRING "Path to GDExtension interface header directory")
 set(CPP_BINDINGS_PATH ../ CACHE STRING "Path to C++ bindings")
 
 if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
@@ -103,7 +103,7 @@ target_include_directories(${PROJECT_NAME} SYSTEM
 	PRIVATE
 		${CPP_BINDINGS_PATH}/include
 		${CPP_BINDINGS_PATH}/gen/include
-		${GODOT_HEADERS_PATH}
+		${GODOT_GDEXTENSION_DIR}
 )
 
 # Create the correct name (godot.os.build_type.system_bits)

test/src/register_types.cpp

@@ -5,7 +5,7 @@
 
 #include "register_types.h"
 
-#include <godot/gdextension_interface.h>
+#include <gdextension_interface.h>
 
 #include <godot_cpp/core/class_db.hpp>
 #include <godot_cpp/core/defs.hpp>