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#!/usr/bin/python
"""Updates the tzdata file."""
import ftplib
import httplib
import os
import re
import subprocess
import sys
import tarfile
import tempfile
# Find the bionic directory, searching upward from this script.
bionic_libc_tools_zoneinfo_dir = os.path.realpath(os.path.dirname(sys.argv[0]))
bionic_libc_tools_dir = os.path.dirname(bionic_libc_tools_zoneinfo_dir)
bionic_libc_dir = os.path.dirname(bionic_libc_tools_dir)
bionic_dir = os.path.dirname(bionic_libc_dir)
bionic_libc_zoneinfo_dir = '%s/libc/zoneinfo' % bionic_dir
if not os.path.isdir(bionic_libc_tools_zoneinfo_dir):
print "Couldn't find bionic/libc/tools/zoneinfo!"
sys.exit(1)
if not os.path.isdir(bionic_libc_zoneinfo_dir):
print "Couldn't find bionic/libc/zoneinfo!"
sys.exit(1)
print 'Found bionic in %s...' % bionic_dir
regions = ['africa', 'antarctica', 'asia', 'australasia', 'backward',
'etcetera', 'europe', 'northamerica', 'southamerica']
def GetCurrentTzDataVersion():
return open('%s/tzdata' % bionic_libc_zoneinfo_dir).read().split('\x00', 1)[0]
def WriteSetupFile():
"""Writes the list of zones that ZoneCompactor should process."""
links = []
zones = []
for region in regions:
for line in open('extracted/%s' % region):
fields = line.split()
if fields:
if fields[0] == 'Link':
links.append('%s %s %s\n' % (fields[0], fields[1], fields[2]))
zones.append(fields[2])
elif fields[0] == 'Zone':
zones.append(fields[1])
zones.sort()
setup = open('setup', 'w')
for link in links:
setup.write(link)
for zone in zones:
setup.write('%s\n' % zone)
setup.close()
def SwitchToNewTemporaryDirectory():
tmp_dir = tempfile.mkdtemp('-tzdata')
os.chdir(tmp_dir)
print 'Created temporary directory "%s"...' % tmp_dir
def FtpRetrieve(ftp, filename):
ftp.retrbinary('RETR %s' % filename, open(filename, 'wb').write)
def FtpUpgrade(ftp, data_filename):
"""Downloads and repackages the given data from the given FTP server."""
SwitchToNewTemporaryDirectory()
print 'Downloading data...'
FtpRetrieve(ftp, data_filename)
print 'Downloading signature...'
signature_filename = '%s.asc' % data_filename
FtpRetrieve(ftp, signature_filename)
ExtractAndCompile(data_filename)
def HttpRetrieve(http, path, output_filename):
http.request("GET", path)
f = open(output_filename, 'wb')
f.write(http.getresponse().read())
f.close()
def HttpUpgrade(http, data_filename):
"""Downloads and repackages the given data from the given HTTP server."""
SwitchToNewTemporaryDirectory()
path = "/time-zones/repository/releases/%s" % data_filename
print 'Downloading data...'
HttpRetrieve(http, path, data_filename)
print 'Downloading signature...'
signature_filename = '%s.asc' % data_filename
HttpRetrieve(http, "%s.asc" % path, signature_filename)
ExtractAndCompile(data_filename)
def ExtractAndCompile(data_filename):
new_version = re.search('(tzdata.+)\\.tar\\.gz', data_filename).group(1)
signature_filename = '%s.asc' % data_filename
print 'Verifying signature...'
# If this fails for you, you probably need to import Paul Eggert's public key:
# gpg --recv-keys ED97E90E62AA7E34
subprocess.check_call(['gpg', '--trusted-key=ED97E90E62AA7E34', '--verify',
signature_filename, data_filename])
print 'Extracting...'
os.mkdir('extracted')
tar = tarfile.open(data_filename, 'r')
tar.extractall('extracted')
print 'Calling zic(1)...'
os.mkdir('data')
for region in regions:
if region != 'backward':
subprocess.check_call(['zic', '-d', 'data', 'extracted/%s' % region])
WriteSetupFile()
print 'Calling ZoneCompactor to update bionic to %s...' % new_version
libcore_src_dir = '%s/../libcore/luni/src/main/java/' % bionic_dir
subprocess.check_call(['javac', '-d', '.',
'%s/ZoneCompactor.java' % bionic_libc_tools_zoneinfo_dir,
'%s/libcore/util/ZoneInfo.java' % libcore_src_dir,
'%s/libcore/io/BufferIterator.java' % libcore_src_dir])
subprocess.check_call(['java', 'ZoneCompactor',
'setup', 'data', 'extracted/zone.tab',
bionic_libc_zoneinfo_dir, new_version])
# Run with no arguments from any directory, with no special setup required.
# See http://www.iana.org/time-zones/ for more about the source of this data.
def main():
print 'Looking for new tzdata...'
tzdata_filenames = []
# The FTP server lets you download intermediate releases, and also lets you
# download the signatures for verification, so it's your best choice. It's
# also less reliable than the HTTP server, so we support that too as a backup.
use_ftp = True
if use_ftp:
ftp = ftplib.FTP('ftp.iana.org')
ftp.login()
ftp.cwd('tz/releases')
for filename in ftp.nlst():
if filename.startswith('tzdata20') and filename.endswith('.tar.gz'):
tzdata_filenames.append(filename)
tzdata_filenames.sort()
else:
http = httplib.HTTPConnection('www.iana.org')
http.request("GET", "/time-zones")
index_lines = http.getresponse().read().split('\n')
for line in index_lines:
m = re.compile('.*href="/time-zones/repository/releases/(tzdata20\d\d\c\.tar\.gz)".*').match(line)
if m:
tzdata_filenames.append(m.group(1))
# If you're several releases behind, we'll walk you through the upgrades
# one by one.
current_version = GetCurrentTzDataVersion()
current_filename = '%s.tar.gz' % current_version
for filename in tzdata_filenames:
if filename > current_filename:
print 'Found new tzdata: %s' % filename
if use_ftp:
FtpUpgrade(ftp, filename)
else:
HttpUpgrade(http, filename)
sys.exit(0)
print 'You already have the latest tzdata (%s)!' % current_version
sys.exit(0)
if __name__ == '__main__':
main()
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