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"""Generates the timezone data files used by Android.""" 18 19from __future__ import print_function 20 21import glob 22import os 23import re 24import subprocess 25import sys 26import tarfile 27import tempfile 28 29sys.path.append('%s/external/icu/tools' % os.environ.get('ANDROID_BUILD_TOP')) 30import i18nutil 31import icuutil 32import tzdatautil 33 34 35# Calculate the paths that are referred to by multiple functions. 36android_build_top = i18nutil.GetAndroidRootOrDie() 37timezone_dir = os.path.realpath('%s/system/timezone' % android_build_top) 38i18nutil.CheckDirExists(timezone_dir, 'system/timezone') 39 40android_host_out = i18nutil.GetAndroidHostOutOrDie() 41 42zone_compactor_dir = os.path.realpath('%s/system/timezone/zone_compactor' % android_build_top) 43i18nutil.CheckDirExists(timezone_dir, 'system/timezone/zone_zompactor') 44 45timezone_input_tools_dir = os.path.realpath('%s/input_tools' % timezone_dir) 46timezone_input_data_dir = os.path.realpath('%s/input_data' % timezone_dir) 47 48timezone_output_data_dir = '%s/output_data' % timezone_dir 49i18nutil.CheckDirExists(timezone_output_data_dir, 'output_data') 50 51tmp_dir = tempfile.mkdtemp('-tzdata') 52 53def GenerateZicInputFile(extracted_iana_data_dir): 54 # Android APIs assume DST means "summer time" so we follow the rearguard format 55 # introduced in 2018e. 56 zic_input_file_name = 'rearguard.zi' 57 58 # 'NDATA=' is used to remove unnecessary rules files. 59 subprocess.check_call(['make', '-C', extracted_iana_data_dir, 'NDATA=', zic_input_file_name]) 60 61 zic_input_file = '%s/%s' % (extracted_iana_data_dir, zic_input_file_name) 62 if not os.path.exists(zic_input_file): 63 print('Could not find %s' % zic_input_file) 64 sys.exit(1) 65 return zic_input_file 66 67 68def WriteSetupFile(zic_input_file): 69 """Writes the list of zones that ZoneCompactor should process.""" 70 links = [] 71 zones = [] 72 for line in open(zic_input_file): 73 fields = line.split() 74 if fields: 75 if fields[0] == 'Link': 76 links.append('%s %s %s' % (fields[0], fields[1], fields[2])) 77 zones.append(fields[2]) 78 elif fields[0] == 'Zone': 79 zones.append(fields[1]) 80 zones.sort() 81 82 zone_compactor_setup_file = '%s/setup' % tmp_dir 83 setup = open(zone_compactor_setup_file, 'w') 84 for link in sorted(set(links)): 85 setup.write('%s\n' % link) 86 for zone in sorted(set(zones)): 87 setup.write('%s\n' % zone) 88 setup.close() 89 return zone_compactor_setup_file 90 91 92def BuildIcuData(iana_data_tar_file): 93 icu_build_dir = '%s/icu' % tmp_dir 94 95 icuutil.PrepareIcuBuild(icu_build_dir) 96 icuutil.MakeTzDataFiles(icu_build_dir, iana_data_tar_file) 97 98 # Create ICU system image files. 99 icuutil.MakeAndCopyIcuDataFiles(icu_build_dir) 100 101 icu_overlay_dir = '%s/icu_overlay' % timezone_output_data_dir 102 103 # Create the ICU overlay time zone file. 104 icu_overlay_dat_file = '%s/icu_tzdata.dat' % icu_overlay_dir 105 icuutil.MakeAndCopyOverlayTzIcuData(icu_build_dir, icu_overlay_dat_file) 106 107 # Copy ICU license file(s) 108 icuutil.CopyLicenseFiles(icu_overlay_dir) 109 110 111def GetIanaVersion(iana_tar_file): 112 iana_tar_filename = os.path.basename(iana_tar_file) 113 iana_version = re.search('tz(?:data|code)(.+)\\.tar\\.gz', iana_tar_filename).group(1) 114 return iana_version 115 116 117def ExtractTarFile(tar_file, dir): 118 print('Extracting %s...' % tar_file) 119 if not os.path.exists(dir): 120 os.mkdir(dir) 121 tar = tarfile.open(tar_file, 'r') 122 tar.extractall(dir) 123 124 125def BuildZic(iana_tools_dir): 126 iana_zic_code_tar_file = tzdatautil.GetIanaTarFile(iana_tools_dir, 'code') 127 iana_zic_code_version = GetIanaVersion(iana_zic_code_tar_file) 128 iana_zic_data_tar_file = tzdatautil.GetIanaTarFile(iana_tools_dir, 'data') 129 iana_zic_data_version = GetIanaVersion(iana_zic_data_tar_file) 130 131 print('Found IANA zic release %s/%s in %s/%s ...' \ 132 % (iana_zic_code_version, iana_zic_data_version, iana_zic_code_tar_file, iana_zic_data_tar_file)) 133 134 zic_build_dir = '%s/zic' % tmp_dir 135 ExtractTarFile(iana_zic_code_tar_file, zic_build_dir) 136 ExtractTarFile(iana_zic_data_tar_file, zic_build_dir) 137 138 # zic 139 print('Building zic...') 140 # VERSION_DEPS= is to stop the build process looking for files that might not 141 # be present across different versions. 142 subprocess.check_call(['make', '-C', zic_build_dir, 'zic']) 143 144 zic_binary_file = '%s/zic' % zic_build_dir 145 if not os.path.exists(zic_binary_file): 146 print('Could not find %s' % zic_binary_file) 147 sys.exit(1) 148 return zic_binary_file 149 150 151def BuildTzdata(zic_binary_file, extracted_iana_data_dir, iana_data_version): 152 print('Generating zic input file...') 153 zic_input_file = GenerateZicInputFile(extracted_iana_data_dir) 154 155 print('Calling zic...') 156 zic_output_dir = '%s/data' % tmp_dir 157 os.mkdir(zic_output_dir) 158 zic_cmd = [zic_binary_file, '-d', zic_output_dir, zic_input_file] 159 subprocess.check_call(zic_cmd) 160 161 # ZoneCompactor 162 zone_compactor_setup_file = WriteSetupFile(zic_input_file) 163 164 print('Calling ZoneCompactor to update tzdata to %s...' % iana_data_version) 165 subprocess.check_call(['make', '-C', android_build_top, '-j30', 'zone_compactor']) 166 167 # Create args for ZoneCompactor 168 zone_tab_file = '%s/zone.tab' % extracted_iana_data_dir 169 jar_file = '%s/framework/zone_compactor.jar' % android_host_out 170 header_string = 'tzdata%s' % iana_data_version 171 172 print('Executing ZoneCompactor...') 173 iana_output_data_dir = '%s/iana' % timezone_output_data_dir 174 subprocess.check_call(['java', '-jar', jar_file, 175 zone_compactor_setup_file, zic_output_dir, zone_tab_file, 176 iana_output_data_dir, header_string]) 177 178 179def BuildTzlookup(iana_data_dir): 180 countryzones_source_file = '%s/android/countryzones.txt' % timezone_input_data_dir 181 tzlookup_dest_file = '%s/android/tzlookup.xml' % timezone_output_data_dir 182 183 print('Calling TzLookupGenerator to create tzlookup.xml...') 184 subprocess.check_call(['make', '-C', android_build_top, '-j30', 'tzlookup_generator']) 185 186 jar_file = '%s/framework/tzlookup_generator.jar' % android_host_out 187 zone_tab_file = '%s/zone.tab' % iana_data_dir 188 subprocess.check_call(['java', '-jar', jar_file, 189 countryzones_source_file, zone_tab_file, tzlookup_dest_file]) 190 191 192def CreateDistroFiles(iana_data_version, output_distro_dir, output_version_file): 193 create_distro_script = '%s/distro/tools/create-distro.py' % timezone_dir 194 195 tzdata_file = '%s/iana/tzdata' % timezone_output_data_dir 196 icu_file = '%s/icu_overlay/icu_tzdata.dat' % timezone_output_data_dir 197 tzlookup_file = '%s/android/tzlookup.xml' % timezone_output_data_dir 198 199 distro_file_pattern = '%s/*.zip' % output_distro_dir 200 existing_files = glob.glob(distro_file_pattern) 201 202 print('Removing %s' % existing_files) 203 for existing_file in existing_files: 204 os.remove(existing_file) 205 206 subprocess.check_call([create_distro_script, 207 '-iana_version', iana_data_version, 208 '-tzdata', tzdata_file, 209 '-icu', icu_file, 210 '-tzlookup', tzlookup_file, 211 '-output_distro_dir', output_distro_dir, 212 '-output_version_file', output_version_file]) 213 214def UpdateTestFiles(): 215 testing_data_dir = '%s/testing/data' % timezone_dir 216 update_test_files_script = '%s/create-test-data.sh' % testing_data_dir 217 subprocess.check_call([update_test_files_script], cwd=testing_data_dir) 218 219 220# Run with no arguments from any directory, with no special setup required. 221# See http://www.iana.org/time-zones/ for more about the source of this data. 222def main(): 223 print('Source data file structure: %s' % timezone_input_data_dir) 224 print('Source tools file structure: %s' % timezone_input_tools_dir) 225 print('Output data file structure: %s' % timezone_output_data_dir) 226 227 iana_input_data_dir = '%s/iana' % timezone_input_data_dir 228 iana_data_tar_file = tzdatautil.GetIanaTarFile(iana_input_data_dir, 'data') 229 iana_data_version = GetIanaVersion(iana_data_tar_file) 230 print('IANA time zone data release %s in %s ...' % (iana_data_version, iana_data_tar_file)) 231 232 icu_dir = icuutil.icuDir() 233 print('Found icu in %s ...' % icu_dir) 234 235 BuildIcuData(iana_data_tar_file) 236 237 iana_tools_dir = '%s/iana' % timezone_input_tools_dir 238 zic_binary_file = BuildZic(iana_tools_dir) 239 240 iana_data_dir = '%s/iana_data' % tmp_dir 241 ExtractTarFile(iana_data_tar_file, iana_data_dir) 242 BuildTzdata(zic_binary_file, iana_data_dir, iana_data_version) 243 BuildTzlookup(iana_data_dir) 244 245 # Create a distro file and version file from the output from prior stages. 246 output_distro_dir = '%s/distro' % timezone_output_data_dir 247 output_version_file = '%s/version/tz_version' % timezone_output_data_dir 248 CreateDistroFiles(iana_data_version, output_distro_dir, output_version_file) 249 250 # Update test versions of distro files too. 251 UpdateTestFiles() 252 253 print('Look in %s and %s for new files' % (timezone_output_data_dir, icu_dir)) 254 sys.exit(0) 255 256 257if __name__ == '__main__': 258 main() 259