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#!/usr/bin/env python
import os
import hashlib
from six.moves.urllib import request
from dateutil.zoneinfo import rebuild
# ad-hoc solution. TODO: use configuration file or something
TZRELEASES = "ftp://ftp.iana.org/tz/releases/"
TZFILEPATTERN = "tzdata{tag}.tar.gz"
TZTAG = "2014j"
SHA512 = "4c2979be3a96f91f8576304ec905d571b73df0842c8300c1d7317819b45ab3e29948ed911aa265b12a4ad587d5cba44f646dd02e40e4fbf9e68556a2d327142e"
TZFILE = TZFILEPATTERN.format(tag=TZTAG)
def main():
if not os.path.isfile(TZFILE):
print("Downloading tz file from iana")
request.urlretrieve(TZRELEASES + TZFILE, TZFILE)
with open(TZFILE,'rb') as tzfile:
sha_hasher = hashlib.sha512()
sha_hasher.update(tzfile.read())
sha_512_file = sha_hasher.hexdigest()
assert SHA512 == sha_512_file, "SHA failed for downloaded tz file"
print("Updating timezone information...")
rebuild(TZFILE, TZTAG)
print("Done.")
if __name__ == "__main__":
main()
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