[CI] Add patches to use build profile and speed up builds

.github/workflows/build_release.yml

@@ -129,7 +129,7 @@ jobs:
 
     env:
       SCONS_CACHE: ${{ github.workspace }}/.scons-cache/
-      SCONSFLAGS: ${{ matrix.sconsflags }} platform=${{ matrix.platform }} arch=${{ matrix.arch }} --jobs=2
+      SCONSFLAGS: ${{ matrix.sconsflags }} platform=${{ matrix.platform }} arch=${{ matrix.arch }} build_profile=build_profile.json --jobs=2
 
     defaults:
       run:
@@ -196,6 +196,12 @@ jobs:
           patch -p1 < misc/patches/scons_path.diff
           patch -p1 < misc/patches/gdnantive_arm_warnings.diff
 
+      - name: Patch godot-cpp to support build profile.
+        run: |
+          patch -p1 < misc/patches/build_profile.diff
+          patch -p1 < misc/patches/build_profile_4.0.diff
+          patch -p1 < misc/patches/build_profile_3.x.diff
+
       - name: Print tools versions
         run: |
           python --version

build_profile.json

@@ -0,0 +1,10 @@
+{
+	"enabled_classes": [
+		"WebRTCDataChannelExtension",
+		"WebRTCPeerConnectionExtension",
+		"WebRTCDataChannelGDNative",
+		"WebRTCPeerConnectionGDNative",
+		"NativeScript",
+		"GDNativeLibrary"
+	]
+}

misc/patches/build_profile.diff

@@ -0,0 +1,238 @@
+diff --git a/godot-cpp/SConstruct b/godot-cpp/SConstruct
+index 42f8fc0..9d59d1f 100644
+--- a/godot-cpp/SConstruct
++++ b/godot-cpp/SConstruct
+@@ -121,6 +121,14 @@ opts.Add(
+     BoolVariable("generate_bindings", "Force GDExtension API bindings generation. Auto-detected by default.", False)
+ )
+ opts.Add(BoolVariable("generate_template_get_node", "Generate a template version of the Node class's get_node.", True))
++opts.Add(
++    PathVariable(
++        "build_profile",
++        "Path to a file containing a feature build profile",
++        default=env.get("build_profile", None),
++        validator=lambda key, val, env: os.path.isfile(normalize_path(val)),
++    )
++)
+
+ opts.Add(BoolVariable("build_library", "Build the godot-cpp library.", True))
+ opts.Add(EnumVariable("precision", "Set the floating-point precision level", "single", ("single", "double")))
+diff --git a/godot-cpp/binding_generator.py b/godot-cpp/binding_generator.py
+index d04c698..41cf29b 100644
+--- a/godot-cpp/binding_generator.py
++++ b/godot-cpp/binding_generator.py
+@@ -70,12 +70,14 @@ def generate_wrappers(target):
+         f.write(txt)
+
+
+-def get_file_list(api_filepath, output_dir, headers=False, sources=False):
++def get_file_list(api_filepath, output_dir, headers=False, sources=False, profile_filepath=""):
+     api = {}
+     files = []
+     with open(api_filepath, encoding="utf-8") as api_file:
+         api = json.load(api_file)
+
++    build_profile = parse_build_profile(profile_filepath, api)
++
+     core_gen_folder = Path(output_dir) / "gen" / "include" / "godot_cpp" / "core"
+     include_gen_folder = Path(output_dir) / "gen" / "include" / "godot_cpp"
+     source_gen_folder = Path(output_dir) / "gen" / "src"
+@@ -104,7 +106,7 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
+         source_filename = source_gen_folder / "classes" / (camel_to_snake(engine_class["name"]) + ".cpp")
+         if headers:
+             files.append(str(header_filename.as_posix()))
+-        if sources:
++        if sources and is_class_included(engine_class["name"], build_profile):
+             files.append(str(source_filename.as_posix()))
+
+     for native_struct in api["native_structures"]:
+@@ -134,14 +136,107 @@ def get_file_list(api_filepath, output_dir, headers=False, sources=False):
+     return files
+
+
+-def print_file_list(api_filepath, output_dir, headers=False, sources=False):
++def print_file_list(api_filepath, output_dir, headers=False, sources=False, profile_filepath=""):
+     end = ";"
+-    for f in get_file_list(api_filepath, output_dir, headers, sources):
++    for f in get_file_list(api_filepath, output_dir, headers, sources, profile_filepath):
+         print(f, end=end)
+
+
++def parse_build_profile(profile_filepath, api):
++    if profile_filepath == "":
++        return {}
++    print("Using feature build profile: " + profile_filepath)
++
++    with open(profile_filepath, encoding="utf-8") as profile_file:
++        profile = json.load(profile_file)
++
++    api_dict = {}
++    parents = {}
++    children = {}
++    for engine_class in api["classes"]:
++        api_dict[engine_class["name"]] = engine_class
++        parent = engine_class.get("inherits", "")
++        child = engine_class["name"]
++        parents[child] = parent
++        if parent == "":
++            continue
++        children[parent] = children.get(parent, [])
++        children[parent].append(child)
++
++    # Parse methods dependencies
++    deps = {}
++    reverse_deps = {}
++    for name, engine_class in api_dict.items():
++        ref_cls = set()
++        for method in engine_class.get("methods", []):
++            rtype = method.get("return_value", {}).get("type", "")
++            args = [a["type"] for a in method.get("arguments", [])]
++            if rtype in api_dict:
++                ref_cls.add(rtype)
++            elif is_enum(rtype) and get_enum_class(rtype) in api_dict:
++                ref_cls.add(get_enum_class(rtype))
++            for arg in args:
++                if arg in api_dict:
++                    ref_cls.add(arg)
++                elif is_enum(arg) and get_enum_class(arg) in api_dict:
++                    ref_cls.add(get_enum_class(arg))
++        deps[engine_class["name"]] = set(filter(lambda x: x != name, ref_cls))
++        for acls in ref_cls:
++            if acls == name:
++                continue
++            reverse_deps[acls] = reverse_deps.get(acls, set())
++            reverse_deps[acls].add(name)
++
++    included = []
++    front = list(profile.get("enabled_classes", []))
++    if front:
++        # These must always be included
++        front.append("WorkerThreadPool")
++        front.append("ClassDB")
++        front.append("ClassDBSingleton")
++    while front:
++        cls = front.pop()
++        if cls in included:
++            continue
++        included.append(cls)
++        parent = parents.get(cls, "")
++        if parent:
++            front.append(parent)
++        for rcls in deps.get(cls, set()):
++            if rcls in included or rcls in front:
++                continue
++            front.append(rcls)
++
++    excluded = []
++    front = list(profile.get("disabled_classes", []))
++    while front:
++        cls = front.pop()
++        if cls in excluded:
++            continue
++        excluded.append(cls)
++        front += children.get(cls, [])
++        for rcls in reverse_deps.get(cls, set()):
++            if rcls in excluded or rcls in front:
++                continue
++            front.append(rcls)
++
++    if included and excluded:
++        print(
++            "WARNING: Cannot specify both 'enabled_classes' and 'disabled_classes' in build profile. 'disabled_classes' will be ignored."
++        )
++
++    return {
++        "enabled_classes": included,
++        "disabled_classes": excluded,
++    }
++
++
+ def scons_emit_files(target, source, env):
+-    files = [env.File(f) for f in get_file_list(str(source[0]), target[0].abspath, True, True)]
++    profile_filepath = env.get("build_profile", "")
++    if profile_filepath and not Path(profile_filepath).is_absolute():
++        profile_filepath = str((Path(env.Dir("#").abspath) / profile_filepath).as_posix())
++
++    files = [env.File(f) for f in get_file_list(str(source[0]), target[0].abspath, True, True, profile_filepath)]
+     env.Clean(target, files)
+     env["godot_cpp_gen_dir"] = target[0].abspath
+     return files, source
+@@ -154,11 +249,12 @@ def scons_generate_bindings(target, source, env):
+         "32" if "32" in env["arch"] else "64",
+         env["precision"],
+         env["godot_cpp_gen_dir"],
++        env.get("build_profile", ""),
+     )
+     return None
+
+
+-def generate_bindings(api_filepath, use_template_get_node, bits="64", precision="single", output_dir="."):
++def generate_bindings(api_filepath, use_template_get_node, bits="64", precision="single", output_dir=".", profile_filepath=""):
+     api = None
+
+     target_dir = Path(output_dir) / "gen"
+@@ -175,7 +271,7 @@ def generate_bindings(api_filepath, use_template_get_node, bits="64", precision=
+     generate_global_constants(api, target_dir)
+     generate_global_constant_binds(api, target_dir)
+     generate_builtin_bindings(api, target_dir, real_t + "_" + bits)
+-    generate_engine_classes_bindings(api, target_dir, use_template_get_node)
++    generate_engine_classes_bindings(api, target_dir, use_template_get_node, profile_filepath)
+     generate_utility_functions(api, target_dir)
+
+
+@@ -1023,7 +1119,7 @@ def generate_builtin_class_source(builtin_api, size, used_classes, fully_used_cl
+     return "\n".join(result)
+
+
+-def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
++def generate_engine_classes_bindings(api, output_dir, use_template_get_node, profile_filepath=""):
+     global engine_classes
+     global singletons
+     global native_structures
+@@ -1161,7 +1257,7 @@ def generate_engine_classes_bindings(api, output_dir, use_template_get_node):
+
+     register_engine_classes_filename = Path(output_dir) / "src" / "register_engine_classes.cpp"
+     with register_engine_classes_filename.open("w+", encoding="utf-8") as source_file:
+-        source_file.write(generate_register_engine_classes_source(api))
++        source_file.write(generate_register_engine_classes_source(api, profile_filepath))
+
+     for native_struct in api["native_structures"]:
+         struct_name = native_struct["name"]
+@@ -1585,12 +1681,14 @@ def generate_engine_class_source(class_api, used_classes, fully_used_classes, us
+     return "\n".join(result)
+
+
+-def generate_register_engine_classes_source(api):
++def generate_register_engine_classes_source(api, profile_filepath=""):
+     includes = []
+     registrations = []
+
++    build_profile = parse_build_profile(profile_filepath, api)
++
+     for class_api in api["classes"]:
+-        if class_api["name"] == "ClassDB":
++        if class_api["name"] == "ClassDB" or not is_class_included(class_api["name"], build_profile):
+             continue
+
+         class_name = class_api["name"]
+@@ -2066,6 +2164,20 @@ def is_pod_type(type_name):
+     ]
+
+
++def is_class_included(class_name, build_profile):
++    """
++    Check if an engine class should be included.
++    This removes classes according to a build profile of enabled or disabled classes.
++    """
++    included = build_profile.get("enabled_classes", [])
++    excluded = build_profile.get("disabled_classes", [])
++    if included:
++        return class_name in included
++    if excluded:
++        return class_name not in excluded
++    return True
++
++
+ def is_included_type(type_name):
+     # Types which we already have implemented.
+     return is_included_struct_type(type_name) or type_name in ["ObjectID"]