197 lines
6.7 KiB
Python
Executable file
197 lines
6.7 KiB
Python
Executable file
#!/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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"""Generates the timezone data files used by Android."""
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import glob
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import os
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import re
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import shutil
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import subprocess
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import sys
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import tarfile
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import tempfile
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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 icuutil
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import tzdatautil
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regions = ['africa', 'antarctica', 'asia', 'australasia',
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'etcetera', 'europe', 'northamerica', 'southamerica',
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# These two deliberately come last so they override what came
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# before (and each other).
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'backward', 'backzone' ]
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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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timezone_dir = os.path.realpath('%s/system/timezone' % android_build_top)
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i18nutil.CheckDirExists(timezone_dir, 'system/timezone')
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zone_compactor_dir = os.path.realpath('%s/system/timezone/zone_compactor' % android_build_top)
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i18nutil.CheckDirExists(timezone_dir, 'system/timezone/zone_zompactor')
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timezone_input_data_dir = os.path.realpath('%s/input_data' % timezone_dir)
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timezone_output_data_dir = '%s/output_data' % timezone_dir
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i18nutil.CheckDirExists(timezone_output_data_dir, 'output_data')
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tmp_dir = tempfile.mkdtemp('-tzdata')
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def WriteSetupFile(extracted_iana_dir):
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"""Writes the list of zones that ZoneCompactor should process."""
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links = []
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zones = []
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for region in regions:
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for line in open('%s/%s' % (extracted_iana_dir, region)):
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fields = line.split()
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if fields:
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if fields[0] == 'Link':
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links.append('%s %s %s' % (fields[0], fields[1], fields[2]))
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zones.append(fields[2])
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elif fields[0] == 'Zone':
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zones.append(fields[1])
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zones.sort()
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zone_compactor_setup_file = '%s/setup' % tmp_dir
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setup = open(zone_compactor_setup_file, 'w')
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for link in sorted(set(links)):
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setup.write('%s\n' % link)
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for zone in sorted(set(zones)):
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setup.write('%s\n' % zone)
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setup.close()
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return zone_compactor_setup_file
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def BuildIcuData(iana_tar_file):
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icu_build_dir = '%s/icu' % tmp_dir
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icuutil.PrepareIcuBuild(icu_build_dir)
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icuutil.MakeTzDataFiles(icu_build_dir, iana_tar_file)
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# Create ICU system image files.
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icuutil.MakeAndCopyIcuDataFiles(icu_build_dir)
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# Create the ICU overlay time zone file.
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icu_overlay_dat_file = '%s/icu_overlay/icu_tzdata.dat' % timezone_output_data_dir
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icuutil.MakeAndCopyOverlayTzIcuData(icu_build_dir, icu_overlay_dat_file)
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def ExtractIanaVersion(iana_tar_file):
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iana_tar_filename = os.path.basename(iana_tar_file)
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iana_version = re.search('tzdata(.+)\\.tar\\.gz', iana_tar_filename).group(1)
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return iana_version
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def BuildTzdata(iana_tar_file):
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iana_version = ExtractIanaVersion(iana_tar_file)
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header_string = 'tzdata%s' % iana_version
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print 'Extracting...'
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extracted_iana_dir = '%s/extracted_iana' % tmp_dir
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os.mkdir(extracted_iana_dir)
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tar = tarfile.open(iana_tar_file, 'r')
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tar.extractall(extracted_iana_dir)
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print 'Calling zic(1)...'
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zic_output_dir = '%s/data' % tmp_dir
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os.mkdir(zic_output_dir)
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zic_generator_template = '%s/%%s' % extracted_iana_dir
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zic_inputs = [ zic_generator_template % x for x in regions ]
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zic_cmd = ['zic', '-d', zic_output_dir ]
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zic_cmd.extend(zic_inputs)
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subprocess.check_call(zic_cmd)
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zone_compactor_setup_file = WriteSetupFile(extracted_iana_dir)
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print 'Calling ZoneCompactor to update tzdata to %s...' % iana_version
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class_files_dir = '%s/classes' % tmp_dir
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os.mkdir(class_files_dir)
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subprocess.check_call(['javac', '-d', class_files_dir,
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'%s/main/java/ZoneCompactor.java' % zone_compactor_dir])
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zone_tab_file = '%s/zone.tab' % extracted_iana_dir
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iana_output_data_dir = '%s/iana' % timezone_output_data_dir
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subprocess.check_call(['java', '-cp', class_files_dir, 'ZoneCompactor',
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zone_compactor_setup_file, zic_output_dir, zone_tab_file,
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iana_output_data_dir, header_string])
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def BuildTzlookup():
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# We currently just copy a manually-maintained xml file.
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tzlookup_source_file = '%s/android/tzlookup.xml' % timezone_input_data_dir
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tzlookup_dest_file = '%s/android/tzlookup.xml' % timezone_output_data_dir
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shutil.copyfile(tzlookup_source_file, tzlookup_dest_file)
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def CreateDistroFiles(iana_version, output_dir):
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create_distro_script = '%s/distro/tools/create-distro.py' % timezone_dir
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tzdata_file = '%s/iana/tzdata' % timezone_output_data_dir
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icu_file = '%s/icu_overlay/icu_tzdata.dat' % timezone_output_data_dir
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tzlookup_file = '%s/android/tzlookup.xml' % timezone_output_data_dir
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distro_file_pattern = '%s/*.zip' % output_dir
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existing_distro_files = glob.glob(distro_file_pattern)
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distro_file_metadata_pattern = '%s/*.txt' % output_dir
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existing_distro_metadata_files = glob.glob(distro_file_metadata_pattern)
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existing_files = existing_distro_files + existing_distro_metadata_files
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print 'Removing %s' % existing_files
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for existing_file in existing_files:
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os.remove(existing_file)
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subprocess.check_call([create_distro_script,
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'-iana_version', iana_version,
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'-tzdata', tzdata_file,
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'-icu', icu_file,
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'-tzlookup', tzlookup_file,
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'-output', output_dir])
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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 'Found source data file structure in %s ...' % timezone_input_data_dir
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iana_data_dir = '%s/iana' % timezone_input_data_dir
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iana_tar_file = tzdatautil.GetIanaTarFile(iana_data_dir)
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iana_version = ExtractIanaVersion(iana_tar_file)
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print 'Found IANA time zone data release %s in %s ...' % (iana_version, iana_tar_file)
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print 'Found android output dir in %s ...' % timezone_output_data_dir
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icu_dir = icuutil.icuDir()
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print 'Found icu in %s ...' % icu_dir
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BuildIcuData(iana_tar_file)
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BuildTzdata(iana_tar_file)
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BuildTzlookup()
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# Create a distro file from the output from prior stages.
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distro_output_dir = '%s/distro' % timezone_output_data_dir
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CreateDistroFiles(iana_version, distro_output_dir)
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print 'Look in %s and %s for new files' % (timezone_output_data_dir, icu_dir)
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sys.exit(0)
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if __name__ == '__main__':
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main()
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