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102 lines
3.4 KiB
102 lines
3.4 KiB
#!/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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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 FtpRetrieveFileAndCheckSignature(ftp, data_filename): |
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"""Downloads and repackages the given data from the given FTP server.""" |
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print 'Downloading data (%s)...' % data_filename |
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FtpRetrieveFile(ftp, data_filename) |
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signature_filename = '%s.asc' % data_filename |
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print 'Downloading signature (%s)...' % signature_filename |
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FtpRetrieveFile(ftp, signature_filename) |
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print 'Verifying signature...' |
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# If this fails for you, you probably need to import Paul Eggert's public key: |
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# gpg --recv-keys ED97E90E62AA7E34 |
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subprocess.check_call(['gpg', '--trusted-key=ED97E90E62AA7E34', '--verify', |
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signature_filename, data_filename]) |
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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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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('tzdata20') 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) |
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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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FtpRetrieveFileAndCheckSignature(ftp, latest_iana_tar_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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# 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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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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