| #!/usr/bin/env python |
| # Copyright 2014 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| """Remove the build metadata embedded in the artifacts of a build.""" |
| |
| import json |
| import multiprocessing |
| import optparse |
| import os |
| import Queue |
| import shutil |
| import subprocess |
| import sys |
| import tempfile |
| import threading |
| import zipfile |
| |
| |
| BASE_DIR = os.path.dirname(os.path.abspath(__file__)) |
| SRC_DIR = os.path.dirname(os.path.dirname(BASE_DIR)) |
| |
| # Files that can't be processed by zap_timestamp.exe. |
| _ZAP_TIMESTAMP_BLACKLIST = { |
| 'mini_installer.exe', |
| } |
| |
| def get_files_to_clean(build_dir, recursive=False): |
| """Get the list of files to clean.""" |
| allowed = frozenset( |
| ('', '.apk', '.app', '.dll', '.dylib', '.exe', '.nexe', '.so')) |
| non_x_ok_exts = frozenset(('.apk', '.isolated')) |
| min_timestamp = 0 |
| if os.path.exists(os.path.join(build_dir, 'build.ninja')): |
| min_timestamp = os.path.getmtime(os.path.join(build_dir, 'build.ninja')) |
| |
| def check(f): |
| if not os.path.isfile(f) or os.path.basename(f).startswith('.'): |
| return False |
| if os.path.getmtime(os.path.join(build_dir, f)) < min_timestamp: |
| return False |
| ext = os.path.splitext(f)[1] |
| return (ext in non_x_ok_exts) or (ext in allowed and os.access(f, os.X_OK)) |
| |
| ret_files = set() |
| for root, dirs, files in os.walk(build_dir): |
| if not recursive: |
| dirs[:] = [d for d in dirs if d.endswith('_apk')] |
| for f in (f for f in files if check(os.path.join(root, f))): |
| ret_files.add(os.path.relpath(os.path.join(root, f), build_dir)) |
| return ret_files |
| |
| |
| def run_zap_timestamp(filepath): |
| """Run zap_timestamp.exe on a PE binary.""" |
| assert sys.platform == 'win32' |
| syzygy_dir = os.path.join( |
| SRC_DIR, 'third_party', 'syzygy', 'binaries', 'exe') |
| zap_timestamp_exe = os.path.join(syzygy_dir, 'zap_timestamp.exe') |
| sys.stdout.write('Processing: %s\n' % os.path.basename(filepath)) |
| proc = subprocess.Popen( |
| [zap_timestamp_exe, '--input-image=%s' % filepath, '--overwrite'], |
| stdout=subprocess.PIPE, stderr=subprocess.STDOUT) |
| log, _ = proc.communicate() |
| if proc.returncode != 0: |
| sys.stderr.write('%s failed:\n%s\n' % (os.path.basename(filepath), log)) |
| return proc.returncode |
| |
| |
| def remove_pe_metadata(filename): |
| """Remove the build metadata from a PE file.""" |
| # Only run zap_timestamp on the PE files for which we have a PDB. |
| ret = 0 |
| if ((not os.path.basename(filename) in _ZAP_TIMESTAMP_BLACKLIST) and |
| os.path.exists(filename + '.pdb')): |
| ret = run_zap_timestamp(filename) |
| return ret |
| |
| |
| def remove_apk_timestamps(filename): |
| """Remove the timestamps embedded in an apk archive.""" |
| sys.stdout.write('Processing: %s\n' % os.path.basename(filename)) |
| with zipfile.ZipFile(filename, 'r') as zf: |
| # Creates a temporary file. |
| out_file, out_filename = tempfile.mkstemp(prefix='remote_apk_timestamp') |
| os.close(out_file) |
| try: |
| with zipfile.ZipFile(out_filename, 'w') as zf_o: |
| # Copy the data from the original file to the new one. |
| for info in zf.infolist(): |
| # Overwrite the timestamp with a constant value. |
| info.date_time = (1980, 1, 1, 0, 0, 0) |
| zf_o.writestr(info, zf.read(info.filename)) |
| # Remove the original file and replace it by the modified one. |
| os.remove(filename) |
| shutil.move(out_filename, filename) |
| finally: |
| if os.path.isfile(out_filename): |
| os.remove(out_filename) |
| |
| |
| def remove_metadata_worker(file_queue, failed_queue, build_dir): |
| """Worker thread for the remove_metadata function.""" |
| while True: |
| f = file_queue.get() |
| if f.endswith(('.dll', '.exe')): |
| if remove_pe_metadata(os.path.join(build_dir, f)): |
| failed_queue.put(f) |
| elif f.endswith('.apk'): |
| remove_apk_timestamps(os.path.join(build_dir, f)) |
| file_queue.task_done() |
| |
| |
| def remove_metadata(build_dir, recursive): |
| """Remove the build metadata from the artifacts of a build.""" |
| with open(os.path.join(BASE_DIR, 'deterministic_build_blacklist.json')) as f: |
| blacklist = frozenset(json.load(f)) |
| files = Queue.Queue() |
| for f in get_files_to_clean(build_dir, recursive) - blacklist: |
| files.put(f) |
| failed_files = Queue.Queue() |
| |
| for _ in xrange(multiprocessing.cpu_count()): |
| worker = threading.Thread(target=remove_metadata_worker, |
| args=(files, |
| failed_files, |
| build_dir)) |
| worker.daemon = True |
| worker.start() |
| |
| files.join() |
| if not failed_files.empty(): |
| print >> sys.stderr, 'Failed for the following files:' |
| failed_files_list = [] |
| while not failed_files.empty(): |
| failed_files_list.append(failed_files.get()) |
| print >> sys.stderr, '\n'.join(' ' + i for i in sorted(failed_files_list)) |
| return 1 |
| |
| return 0 |
| |
| |
| def main(): |
| parser = optparse.OptionParser(usage='%prog [options]') |
| # TODO(sebmarchand): Add support for reading the list of artifact from a |
| # .isolated file. |
| parser.add_option('--build-dir', help='The build directory.') |
| parser.add_option('-r', '--recursive', action='store_true', default=False, |
| help='Indicates if the script should be recursive.') |
| options, _ = parser.parse_args() |
| |
| if not options.build_dir: |
| parser.error('--build-dir is required') |
| |
| return remove_metadata(options.build_dir, options.recursive) |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |