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# Copyright 2017 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# 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/>.
#
# =*= License: GPL-3+ =*=
import logging
import os
import tempfile
import cliapp
import vmdb
class MountPlugin(cliapp.Plugin):
def enable(self):
self.app.step_runners.add(MountStepRunner())
class MountStepRunner(vmdb.StepRunnerInterface):
def get_required_keys(self):
return ['mount']
def run(self, step, settings, state):
self.mount_rootfs(step, settings, state)
def teardown(self, step, settings, state):
self.unmount_rootfs(step, settings, state)
def mount_rootfs(self, step, settings, state):
tag = step['mount']
dirname = step.get('dirname')
mount_on = step.get('mount-on')
device = state.tags.get_dev(tag)
if dirname:
if not mount_on:
raise Exception('no mount-on tag given')
if not state.tags.has_tag(mount_on):
raise Exception('cannot find tag {}'.format(mount_on))
mount_point = os.path.join(
state.tags.get_mount_point(mount_on), './' + dirname)
if not os.path.exists(mount_point):
os.makedirs(mount_point)
else:
mount_point = tempfile.mkdtemp()
vmdb.runcmd(['mount', device, mount_point])
state.tags.set_mount_point(tag, mount_point, cached=True)
return mount_point
def unmount_rootfs(self, step, settings, state):
tag = step['mount']
mount_point = state.tags.get_mount_point(tag)
if mount_point is None:
return
try:
vmdb.unmount(mount_point)
except vmdb.NotMounted as e:
logging.warning(str(e))
if not step.get('mount-on'):
os.rmdir(mount_point)
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