#!/usr/bin/python -B
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# Copyright 2017 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Downloads the latest IANA timezone data."""
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from __future__ import print_function
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import ftplib
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import os
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import shutil
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import subprocess
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import sys
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sys.path.append('%s/external/icu/tools' % os.environ.get('ANDROID_BUILD_TOP'))
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import i18nutil
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import tzdatautil
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# Calculate the paths that are referred to by multiple functions.
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android_build_top = i18nutil.GetAndroidRootOrDie()
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iana_data_dir = os.path.realpath('%s/system/timezone/input_data/iana' % android_build_top)
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def FtpRetrieveFile(ftp, filename):
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ftp.retrbinary('RETR %s' % filename, open(filename, 'wb').write)
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def CheckSignature(data_filename, signature_filename):
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"""Checks the signature of a file."""
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print('Verifying signature...')
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try:
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subprocess.check_call(['gpg', '--trusted-key=ED97E90E62AA7E34', '--verify',
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signature_filename, data_filename])
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except subprocess.CalledProcessError as err:
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print('Unable to verify signature')
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print('\n\n******')
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print('If this fails for you, you probably need to import Paul Eggert''s public key:')
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print(' gpg --receive-keys ED97E90E62AA7E34')
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print('******\n\n')
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raise
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# Run with no arguments from any directory, with no special setup required.
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# See http://www.iana.org/time-zones/ for more about the source of this data.
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def main():
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print('Looking for new IANA tzdata...')
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tar_prefix = 'tzdata20'
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# Use the input tzdata version name if it exists
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if len(sys.argv) > 1:
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tar_prefix = 'tzdata' + sys.argv[1]
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iana_tar_filenames = []
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ftp = ftplib.FTP('ftp.iana.org')
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ftp.login()
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ftp.cwd('tz/releases')
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for filename in ftp.nlst():
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if "/" in filename:
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print("FTP server returned bogus file name")
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sys.exit(1)
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if filename.startswith(tar_prefix) and filename.endswith('.tar.gz'):
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iana_tar_filenames.append(filename)
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iana_tar_filenames.sort(reverse=True)
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if len(iana_tar_filenames) == 0:
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print('No tzdata files found')
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sys.exit(1)
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latest_iana_tar_filename = iana_tar_filenames[0]
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local_iana_tar_file = tzdatautil.GetIanaTarFile(iana_data_dir, 'data')
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if local_iana_tar_file:
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local_iana_tar_filename = os.path.basename(local_iana_tar_file)
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if latest_iana_tar_filename <= local_iana_tar_filename:
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print('Available data %s is older or the same as current data %s' % (latest_iana_tar_filename, local_iana_tar_filename))
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sys.exit(0)
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print('Found new tzdata: %s' % latest_iana_tar_filename)
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i18nutil.SwitchToNewTemporaryDirectory()
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print('Downloading data (%s)...' % latest_iana_tar_filename)
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FtpRetrieveFile(ftp, latest_iana_tar_filename)
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signature_filename = '%s.asc' % latest_iana_tar_filename
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print('Downloading signature (%s)...' % signature_filename)
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FtpRetrieveFile(ftp, signature_filename)
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CheckSignature(latest_iana_tar_filename, signature_filename)
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new_local_iana_tar_file = '%s/%s' % (iana_data_dir, latest_iana_tar_filename)
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shutil.copyfile(latest_iana_tar_filename, new_local_iana_tar_file)
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new_local_signature_file = '%s/%s' % (iana_data_dir, signature_filename)
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shutil.copyfile(signature_filename, new_local_signature_file)
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# Delete the existing local IANA tar file, if there is one.
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if local_iana_tar_file:
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os.remove(local_iana_tar_file)
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local_signature_file = '%s.asc' % local_iana_tar_file
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if os.path.exists(local_signature_file):
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os.remove(local_signature_file)
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print('Look in %s for new IANA data files' % new_local_iana_tar_file)
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sys.exit(0)
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if __name__ == '__main__':
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main()
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