mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-15 17:35:04 +00:00
46 lines
1.7 KiB
Python
46 lines
1.7 KiB
Python
# -*- coding: utf-8 -*-
|
|
import time
|
|
import datetime
|
|
import calendar
|
|
|
|
|
|
def get_system_offset():
|
|
"""Get system's timezone offset using built-in library time.
|
|
|
|
For the Timezone constants (altzone, daylight, timezone, and tzname), the
|
|
value is determined by the timezone rules in effect at module load time or
|
|
the last time tzset() is called and may be incorrect for times in the past.
|
|
|
|
To keep compatibility with Windows, we're always importing time module here.
|
|
"""
|
|
|
|
localtime = calendar.timegm(time.localtime())
|
|
gmtime = calendar.timegm(time.gmtime())
|
|
offset = gmtime - localtime
|
|
# We could get the localtime and gmtime on either side of a second switch
|
|
# so we check that the difference is less than one minute, because nobody
|
|
# has that small DST differences.
|
|
if abs(offset - time.altzone) < 60:
|
|
return -time.altzone
|
|
else:
|
|
return -time.timezone
|
|
|
|
|
|
def get_tz_offset(tz):
|
|
"""Get timezone's offset using built-in function datetime.utcoffset()."""
|
|
return int(datetime.datetime.now(tz).utcoffset().total_seconds())
|
|
|
|
|
|
def assert_tz_offset(tz):
|
|
"""Assert that system's timezone offset equals to the timezone offset found.
|
|
|
|
If they don't match, we probably have a misconfiguration, for example, an
|
|
incorrect timezone set in /etc/timezone file in systemd distributions."""
|
|
tz_offset = get_tz_offset(tz)
|
|
system_offset = get_system_offset()
|
|
if tz_offset != system_offset:
|
|
msg = ('Timezone offset does not match system offset: {0} != {1}. '
|
|
'Please, check your config files.').format(
|
|
tz_offset, system_offset
|
|
)
|
|
raise ValueError(msg)
|