blob: d5410d64d8e6a0af24508da30345222c07e82377 [file] [log] [blame]
#!/usr/bin/env python
# Copyright (c) 2011 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.
"""Extracts a single file from a CAB archive."""
import os
import shutil
import subprocess
import sys
import tempfile
def main():
if len(sys.argv) != 4:
print 'Usage: cab_path archived_file output_dir'
return 1
[cab_path, archived_file, output_dir] = sys.argv[1:]
# Expand.exe does its work in a fixed-named temporary directory created within
# the given output directory. This is a problem for concurrent extractions, so
# create a unique temp dir within the desired output directory to work around
# this limitation.
temp_dir = tempfile.mkdtemp(dir=output_dir)
# Invoke the Windows expand utility to extract the file.
level =
['expand', cab_path, '-F:' + archived_file, temp_dir])
if level == 0:
# Move the output file into place, preserving expand.exe's behavior of
# paving over any preexisting file.
output_file = os.path.join(output_dir, archived_file)
except OSError:
os.rename(os.path.join(temp_dir, archived_file), output_file)
shutil.rmtree(temp_dir, True)
if level != 0:
return level
# The expand utility preserves the modification date and time of the archived
# file. Touch the extracted file. This helps build systems that compare the
# modification times of input and output files to determine whether to do an
# action.
os.utime(os.path.join(output_dir, archived_file), None)
return 0
if __name__ == '__main__':