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#!/usr/bin/env python
import os
import hashlib
import json
import io
from six.moves.urllib import request
from dateutil.zoneinfo import rebuild
METADATA_FILE = "zonefile_metadata.json"
def main():
with io.open(METADATA_FILE,'r') as f:
metadata = json.load(f)
if not os.path.isfile(metadata['tzdata_file']):
print("Downloading tz file from iana")
request.urlretrieve(os.path.join(metadata['releases_url'],metadata['tzdata_file']), metadata['tzdata_file'])
with open(metadata['tzdata_file'],'rb') as tzfile:
sha_hasher = hashlib.sha512()
sha_hasher.update(tzfile.read())
sha_512_file = sha_hasher.hexdigest()
assert metadata['tzdata_file_sha512'] == sha_512_file, "SHA failed for downloaded tz file"
print("Updating timezone information...")
rebuild(metadata['tzdata_file'], zonegroups=metadata['zonegroups'])
print("Done.")
if __name__ == "__main__":
main()
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