Revonzy Mini Shell

# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# This file is part of cloud-init. See LICENSE file for license information.

import copy
import os

from cloudinit import log as logging
from cloudinit.reporting import events

LOG = logging.getLogger(__name__)

# This class is the high level wrapper that provides
# access to cloud-init objects without exposing the stage objects
# to handler and or module manipulation. It allows for cloud
# init to restrict what those types of user facing code may see
# and or adjust (which helps avoid code messing with each other)
#
# It also provides util functions that avoid having to know
# how to get a certain member from this submembers as well
# as providing a backwards compatible object that can be maintained
# while the stages/other objects can be worked on independently...


class Cloud(object):
    def __init__(self, datasource, paths, cfg, distro, runners, reporter=None):
        self.datasource = datasource
        self.paths = paths
        self.distro = distro
        self._cfg = cfg
        self._runners = runners
        if reporter is None:
            reporter = events.ReportEventStack(
                name="unnamed-cloud-reporter",
                description="unnamed-cloud-reporter",
                reporting_enabled=False)
        self.reporter = reporter

    # If a 'user' manipulates logging or logging services
    # it is typically useful to cause the logging to be
    # setup again.
    def cycle_logging(self):
        logging.resetLogging()
        logging.setupLogging(self.cfg)

    @property
    def cfg(self):
        # Ensure that cfg is not indirectly modified
        return copy.deepcopy(self._cfg)

    def run(self, name, functor, args, freq=None, clear_on_fail=False):
        return self._runners.run(name, functor, args, freq, clear_on_fail)

    def get_template_filename(self, name):
        fn = self.paths.template_tpl % (name)
        if not os.path.isfile(fn):
            LOG.warning("No template found in %s for template named %s",
                        os.path.dirname(fn), name)
            return None
        return fn

    # The rest of these are just useful proxies
    def get_userdata(self, apply_filter=True):
        return self.datasource.get_userdata(apply_filter)

    def get_instance_id(self):
        return self.datasource.get_instance_id()

    @property
    def launch_index(self):
        return self.datasource.launch_index

    def get_public_ssh_keys(self):
        return self.datasource.get_public_ssh_keys()

    def get_locale(self):
        return self.datasource.get_locale()

    def get_hostname(self, fqdn=False, metadata_only=False):
        return self.datasource.get_hostname(
            fqdn=fqdn, metadata_only=metadata_only)

    def device_name_to_device(self, name):
        return self.datasource.device_name_to_device(name)

    def get_ipath_cur(self, name=None):
        return self.paths.get_ipath_cur(name)

    def get_cpath(self, name=None):
        return self.paths.get_cpath(name)

    def get_ipath(self, name=None):
        return self.paths.get_ipath(name)

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