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# vi: ts=4 expandtab
#
#    Copyright (C) 2009-2010 Canonical Ltd.
#    Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
#
#    Author: Scott Moser <scott.moser@canonical.com>
#    Author: Juerg Haefliger <juerg.haefliger@hp.com>
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License version 3, as
#    published by the Free Software Foundation.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""
Timezone
--------
**Summary:** set system timezone

Set the system timezone. If any args are passed to the module then the first
will be used for the timezone. Otherwise, the module will attempt to retrieve
the timezone from cloud config.

**Internal name:** ``cc_timezone``

**Module frequency:** per instance

**Supported distros:** all

**Config keys**::

    timezone: <timezone>
"""

from cloudinit import util

from cloudinit.settings import PER_INSTANCE

frequency = PER_INSTANCE


def handle(name, cfg, cloud, log, args):
    if len(args) != 0:
        timezone = args[0]
    else:
        timezone = util.get_cfg_option_str(cfg, "timezone", False)

    if not timezone:
        log.debug("Skipping module named %s, no 'timezone' specified", name)
        return

    # Let the distro handle settings its timezone
    cloud.distro.set_timezone(timezone)