import bsdiff4 import yaml import os import lzma import hashlib import threading import concurrent.futures import zipfile import sys from typing import Tuple, Optional import Utils from worlds.alttp.Rom import JAP10HASH current_patch_version = 1 def get_base_rom_path(file_name: str = "") -> str: options = Utils.get_options() if not file_name: file_name = options["lttp_options"]["rom_file"] if not os.path.exists(file_name): file_name = Utils.local_path(file_name) return file_name def get_base_rom_bytes(file_name: str = "") -> bytes: from worlds.alttp.Rom import read_rom base_rom_bytes = getattr(get_base_rom_bytes, "base_rom_bytes", None) if not base_rom_bytes: file_name = get_base_rom_path(file_name) base_rom_bytes = bytes(read_rom(open(file_name, "rb"))) basemd5 = hashlib.md5() basemd5.update(base_rom_bytes) if JAP10HASH != basemd5.hexdigest(): raise Exception('Supplied Base Rom does not match known MD5 for JAP(1.0) release. ' 'Get the correct game and version, then dump it') get_base_rom_bytes.base_rom_bytes = base_rom_bytes return base_rom_bytes def generate_yaml(patch: bytes, metadata: Optional[dict] = None) -> bytes: patch = yaml.dump({"meta": metadata, "patch": patch, "game": "alttp", "compatible_version": 1, # minimum version of patch system expected for patching to be successful "version": current_patch_version, "base_checksum": JAP10HASH}) return patch.encode(encoding="utf-8-sig") def generate_patch(rom: bytes, metadata: Optional[dict] = None) -> bytes: if metadata is None: metadata = {} patch = bsdiff4.diff(get_base_rom_bytes(), rom) return generate_yaml(patch, metadata) def create_patch_file(rom_file_to_patch: str, server: str = "", destination: str = None) -> str: bytes = generate_patch(load_bytes(rom_file_to_patch), { "server": server}) # allow immediate connection to server in multiworld. Empty string otherwise target = destination if destination else os.path.splitext(rom_file_to_patch)[0] + ".apbp" write_lzma(bytes, target) return target def create_rom_bytes(patch_file: str, ignore_version: bool = False) -> Tuple[dict, str, bytearray]: data = Utils.parse_yaml(lzma.decompress(load_bytes(patch_file)).decode("utf-8-sig")) if not ignore_version and data["compatible_version"] > current_patch_version: raise RuntimeError("Patch file is incompatible with this patcher, likely an update is required.") patched_data = bsdiff4.patch(get_base_rom_bytes(), data["patch"]) rom_hash = patched_data[int(0x7FC0):int(0x7FD5)] data["meta"]["hash"] = "".join(chr(x) for x in rom_hash) target = os.path.splitext(patch_file)[0] + ".sfc" return data["meta"], target, patched_data def create_rom_file(patch_file: str) -> Tuple[dict, str]: data, target, patched_data = create_rom_bytes(patch_file) with open(target, "wb") as f: f.write(patched_data) return data, target def update_patch_data(patch_data: bytes, server: str = "") -> bytes: data = Utils.parse_yaml(lzma.decompress(patch_data).decode("utf-8-sig")) data["meta"]["server"] = server bytes = generate_yaml(data["patch"], data["meta"]) return lzma.compress(bytes) def load_bytes(path: str) -> bytes: with open(path, "rb") as f: return f.read() def write_lzma(data: bytes, path: str): with lzma.LZMAFile(path, 'wb') as f: f.write(data) if __name__ == "__main__": host = Utils.get_public_ipv4() options = Utils.get_options()['server_options'] if options['host']: host = options['host'] address = f"{host}:{options['port']}" ziplock = threading.Lock() print(f"Host for patches to be created is {address}") with concurrent.futures.ThreadPoolExecutor() as pool: for rom in sys.argv: try: if rom.endswith(".sfc"): print(f"Creating patch for {rom}") result = pool.submit(create_patch_file, rom, address) result.add_done_callback(lambda task: print(f"Created patch {task.result()}")) elif rom.endswith(".apbp"): print(f"Applying patch {rom}") data, target = create_rom_file(rom) romfile, adjusted = Utils.get_adjuster_settings(target) if adjusted: try: os.replace(romfile, target) romfile = target except Exception as e: print(e) print(f"Created rom {romfile if adjusted else target}.") if 'server' in data: Utils.persistent_store("servers", data['hash'], data['server']) print(f"Host is {data['server']}") elif rom.endswith(".archipelago"): import json import zlib with open(rom, 'rb') as fr: multidata = zlib.decompress(fr.read()).decode("utf-8") with open(rom + '.txt', 'w') as fw: fw.write(multidata) multidata = json.loads(multidata) for romname in multidata['roms']: Utils.persistent_store("servers", "".join(chr(byte) for byte in romname[2]), address) from Utils import get_options multidata["server_options"] = get_options()["server_options"] multidata = zlib.compress(json.dumps(multidata).encode("utf-8"), 9) with open(rom + "_updated.archipelago", 'wb') as f: f.write(multidata) elif rom.endswith(".zip"): print(f"Updating host in patch files contained in {rom}") def _handle_zip_file_entry(zfinfo: zipfile.ZipInfo, server: str): data = zfr.read(zfinfo) if zfinfo.filename.endswith(".apbp"): data = update_patch_data(data, server) with ziplock: zfw.writestr(zfinfo, data) return zfinfo.filename futures = [] with zipfile.ZipFile(rom, "r") as zfr: updated_zip = os.path.splitext(rom)[0] + "_updated.zip" with zipfile.ZipFile(updated_zip, "w", compression=zipfile.ZIP_DEFLATED, compresslevel=9) as zfw: for zfname in zfr.namelist(): futures.append(pool.submit(_handle_zip_file_entry, zfr.getinfo(zfname), address)) for future in futures: print(f"File {future.result()} added to {os.path.split(updated_zip)[1]}") except: import traceback traceback.print_exc() input("Press enter to close.")