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import json

import sys

def parse_build_profile(profile_filepath, api):

if profile_filepath == "":

return {}

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)

included = []

front = list(profile.get("enabled_classes", []))

if front:

# These must always be included

front.append("WorkerThreadPool")

front.append("ClassDB")

front.append("ClassDBSingleton")

# In src/classes/low_level.cpp

front.append("FileAccess")

front.append("Image")

front.append("XMLParser")

while front:

cls = front.pop()

if cls in included:

continue

included.append(cls)

parent = parents.get(cls, "")

if parent:

front.append(parent)

excluded = []

front = list(profile.get("disabled_classes", []))

while front:

cls = front.pop()

if cls in excluded:

continue

excluded.append(cls)

front += children.get(cls, [])

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 generate_trimmed_api(source_api_filepath, profile_filepath):

with open(source_api_filepath, encoding="utf-8") as api_file:

api = json.load(api_file)

if profile_filepath == "":

return api

build_profile = parse_build_profile(profile_filepath, api)

engine_classes = {}

for class_api in api["classes"]:

engine_classes[class_api["name"]] = class_api["is_refcounted"]

for native_struct in api["native_structures"]:

if native_struct["name"] == "ObjectID":

continue

engine_classes[native_struct["name"]] = False

classes = []

for class_api in api["classes"]:

if not is_class_included(class_api["name"], build_profile):

continue

if "methods" in class_api:

methods = []

for method in class_api["methods"]:

if not is_method_included(method, build_profile, engine_classes):

continue

methods.append(method)

class_api["methods"] = methods

classes.append(class_api)

api["classes"] = classes

return api

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_method_included(method, build_profile, engine_classes):

"""

Check if an engine class method should be included.

This removes methods according to a build profile of enabled or disabled classes.

"""

included = build_profile.get("enabled_classes", [])

excluded = build_profile.get("disabled_classes", [])

ref_cls = set()

rtype = get_base_type(method.get("return_value", {}).get("type", ""))

args = [get_base_type(a["type"]) for a in method.get("arguments", [])]

if rtype in engine_classes:

ref_cls.add(rtype)

elif is_enum(rtype) and get_enum_class(rtype) in engine_classes:

ref_cls.add(get_enum_class(rtype))

for arg in args:

if arg in engine_classes:

ref_cls.add(arg)

elif is_enum(arg) and get_enum_class(arg) in engine_classes:

ref_cls.add(get_enum_class(arg))

for acls in ref_cls:

if len(included) > 0 and acls not in included:

return False

elif len(excluded) > 0 and acls in excluded:

return False

return True

def is_enum(type_name):

return type_name.startswith("enum::") or type_name.startswith("bitfield::")

def get_enum_class(enum_name: str):

if "." in enum_name:

if is_bitfield(enum_name):

return enum_name.replace("bitfield::", "").split(".")[0]

else:

return enum_name.replace("enum::", "").split(".")[0]

else:

return "GlobalConstants"

def get_base_type(type_name):

if type_name.startswith("const "):

type_name = type_name[6:]

if type_name.endswith("*"):

type_name = type_name[:-1]

if type_name.startswith("typedarray::"):

type_name = type_name.replace("typedarray::", "")

return type_name

def is_bitfield(type_name):

return type_name.startswith("bitfield::")

if __name__ == "__main__":

if len(sys.argv) < 3 or len(sys.argv) > 4:

print("Usage: %s BUILD_PROFILE INPUT_JSON [OUTPUT_JSON]" % (sys.argv[0]))

sys.exit(1)

profile = sys.argv[1]

infile = sys.argv[2]

outfile = sys.argv[3] if len(sys.argv) > 3 else ""

api = generate_trimmed_api(infile, profile)

if outfile:

with open(outfile, "w", encoding="utf-8") as f:

json.dump(api, f)

else:

json.dump(api, sys.stdout)