1 #!/usr/bin/env python 2 import os 3 import hashlib 4 import json 5 import io 6 7 from six.moves.urllib import request 8 from six.moves.urllib import error as urllib_error 9 10 from dateutil.zoneinfo import rebuild 11 12 METADATA_FILE = "zonefile_metadata.json" 13 14 15 def main(): 16 with io.open(METADATA_FILE, 'r') as f: 17 metadata = json.load(f) 18 19 releases_urls = metadata['releases_url'] 20 if metadata['metadata_version'] < 2.0: 21 # In later versions the releases URL is a mirror URL 22 releases_urls = [releases_urls] 23 24 if not os.path.isfile(metadata['tzdata_file']): 25 26 for ii, releases_url in enumerate(releases_urls): 27 print("Downloading tz file from mirror {ii}".format(ii=ii)) 28 try: 29 request.urlretrieve(os.path.join(releases_url, 30 metadata['tzdata_file']), 31 metadata['tzdata_file']) 32 except urllib_error.URLError as e: 33 print("Download failed, trying next mirror.") 34 last_error = e 35 continue 36 37 last_error = None 38 break 39 40 if last_error is not None: 41 raise last_error 42 43 with open(metadata['tzdata_file'], 'rb') as tzfile: 44 sha_hasher = hashlib.sha512() 45 sha_hasher.update(tzfile.read()) 46 sha_512_file = sha_hasher.hexdigest() 47 assert metadata['tzdata_file_sha512'] == sha_512_file, "SHA failed for" 48 print("Updating timezone information...") 49 rebuild.rebuild(metadata['tzdata_file'], zonegroups=metadata['zonegroups'], 50 metadata=metadata) 51 print("Done.") 52 53 54 if __name__ == "__main__": 55 main() 56
