1 #!/usr/bin/python -B 2 3 # Copyright 2017 The Android Open Source Project 4 # 5 # Licensed under the Apache License, Version 2.0 (the "License"); 6 # you may not use this file except in compliance with the License. 7 # You may obtain a copy of the License at 8 # 9 # http://www.apache.org/licenses/LICENSE-2.0 10 # 11 # Unless required by applicable law or agreed to in writing, software 12 # distributed under the License is distributed on an "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 # See the License for the specific language governing permissions and 15 # limitations under the License. 16 17 """Downloads the latest IANA timezone data.""" 18 19 import ftplib 20 import os 21 import shutil 22 import subprocess 23 import sys 24 25 sys.path.append('%s/external/icu/tools' % os.environ.get('ANDROID_BUILD_TOP')) 26 import i18nutil 27 import tzdatautil 28 29 # Calculate the paths that are referred to by multiple functions. 30 android_build_top = i18nutil.GetAndroidRootOrDie() 31 iana_data_dir = os.path.realpath('%s/system/timezone/input_data/iana' % android_build_top) 32 33 def FtpRetrieveFile(ftp, filename): 34 ftp.retrbinary('RETR %s' % filename, open(filename, 'wb').write) 35 36 37 def FtpRetrieveFileAndCheckSignature(ftp, data_filename): 38 """Downloads and repackages the given data from the given FTP server.""" 39 print 'Downloading data (%s)...' % data_filename 40 FtpRetrieveFile(ftp, data_filename) 41 42 signature_filename = '%s.asc' % data_filename 43 print 'Downloading signature (%s)...' % signature_filename 44 FtpRetrieveFile(ftp, signature_filename) 45 46 print 'Verifying signature...' 47 # If this fails for you, you probably need to import Paul Eggert's public key: 48 # gpg --recv-keys ED97E90E62AA7E34 49 subprocess.check_call(['gpg', '--trusted-key=ED97E90E62AA7E34', '--verify', 50 signature_filename, data_filename]) 51 52 53 # Run with no arguments from any directory, with no special setup required. 54 # See http://www.iana.org/time-zones/ for more about the source of this data. 55 def main(): 56 print 'Looking for new IANA tzdata...' 57 58 iana_tar_filenames = [] 59 60 ftp = ftplib.FTP('ftp.iana.org') 61 ftp.login() 62 ftp.cwd('tz/releases') 63 for filename in ftp.nlst(): 64 if "/" in filename: 65 print "FTP server returned bogus file name" 66 sys.exit(1) 67 68 if filename.startswith('tzdata20') and filename.endswith('.tar.gz'): 69 iana_tar_filenames.append(filename) 70 iana_tar_filenames.sort(reverse=True) 71 72 if len(iana_tar_filenames) == 0: 73 print 'No tzdata files found' 74 sys.exit(1) 75 76 latest_iana_tar_filename = iana_tar_filenames[0] 77 78 local_iana_tar_file = tzdatautil.GetIanaTarFile(iana_data_dir) 79 80 if local_iana_tar_file: 81 local_iana_tar_filename = os.path.basename(local_iana_tar_file) 82 if latest_iana_tar_filename <= local_iana_tar_filename: 83 print 'Available data %s is older or the same as current data %s' % (latest_iana_tar_filename, local_iana_tar_filename) 84 sys.exit(0) 85 86 print 'Found new tzdata: %s' % latest_iana_tar_filename 87 i18nutil.SwitchToNewTemporaryDirectory() 88 FtpRetrieveFileAndCheckSignature(ftp, latest_iana_tar_filename) 89 90 new_local_iana_tar_file = '%s/%s' % (iana_data_dir, latest_iana_tar_filename) 91 shutil.copyfile(latest_iana_tar_filename, new_local_iana_tar_file) 92 93 # Delete the existing local IANA tar file, if there is one. 94 if local_iana_tar_file: 95 os.remove(local_iana_tar_file) 96 97 print 'Look in %s for new IANA data files' % new_local_iana_tar_file 98 sys.exit(0) 99 100 101 if __name__ == '__main__': 102 main() 103
