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#!/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()
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