#!/usr/bin/env python3 # Copyright 2023 Google Inc. All rights reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import argparse import py_compile import os import sys import shutil import tempfile import zipfile # This file needs to support both python 2 and 3. def process_one_file(info, infile, outzip): if not info.filename.endswith('.py'): outzip.writestr(info, infile.read()) return # Unfortunately py_compile requires the input/output files to be written # out to disk. with tempfile.NamedTemporaryFile(prefix="Soong_precompile_", delete=False) as tmp: shutil.copyfileobj(infile, tmp) in_name = tmp.name with tempfile.NamedTemporaryFile(prefix="Soong_precompile_", delete=False) as tmp: out_name = tmp.name try: # Ensure deterministic pyc by using the hash rather than timestamp. # This is required to improve caching in accelerated builds. # Only works on Python 3.7+ (see https://docs.python.org/3/library/py_compile.html#py_compile.PycInvalidationMode) # which should cover most updated branches and developer machines. if sys.version_info >= (3, 7): py_compile.compile(in_name, out_name, info.filename, doraise=True, invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH) else: py_compile.compile(in_name, out_name, info.filename, doraise=True) with open(out_name, 'rb') as f: info.filename = info.filename + 'c' # Use ZipInfo rather than str to reuse timestamps for deterministic zip files. outzip.writestr(info, f.read()) finally: os.remove(in_name) os.remove(out_name) def main(): parser = argparse.ArgumentParser() parser.add_argument('src_zip') parser.add_argument('dst_zip') args = parser.parse_args() with open(args.dst_zip, 'wb') as outf, open(args.src_zip, 'rb') as inf: with zipfile.ZipFile(outf, mode='w') as outzip, zipfile.ZipFile(inf, mode='r') as inzip: for info in inzip.infolist(): with inzip.open(info.filename, mode='r') as inzipf: process_one_file(info, inzipf, outzip) if __name__ == "__main__": main()