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#!/usr/bin/python2.4
# Copyright 2009, Google Inc.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""Keep a local directory in sync with a website tar file.
This module downloads a tgz, and expands it as needed.
It supports username and password with basic authentication.
"""
import os
import shutil
import tarfile
import http_download
def SyncTgz(url, target, username=None, password=None, verbose=True):
"""Download a file from a remote server.
Args:
url: A URL to download from.
target: Directory to extract to and prefix to use for tgz file.
username: Optional username for download.
password: Optional password for download (ignored if no username).
verbose: Flag indicating if status shut be printed.
"""
shutil.rmtree(target, True)
tgz_filename = target + '.tgz'
if verbose:
print 'Downloading %s to %s...' % (url, tgz_filename)
http_download.HttpDownload(url, tgz_filename,
username=username, password=password)
if verbose:
print 'Extracting from %s...' % tgz_filename
tgz = tarfile.open(tgz_filename, 'r')
for m in tgz:
if verbose:
print m.name
tgz.extract(m, target)
tgz.close()
os.remove(tgz_filename)
if verbose:
print 'Update complete.'
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