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#!/usr/bin/python
# Copyright (C) 2015 Codethink Limited
#
# 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; version 2 of the License.
#
# 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/>.
'''Preparatory checks for Baserock 'ostree' write extension.'''
from gi.repository import GLib
from gi.repository import Gio
from gi.repository import OSTree
import logging
import os
import urlparse
import writeexts
class OSTreeCheckExtension(writeexts.WriteExtension):
def process_args(self, args):
if len(args) != 1:
raise writeexts.ExtensionError(
'Wrong number of command line args')
upgrade = self.get_environment_boolean('UPGRADE')
if upgrade:
raise writeexts.ExtensionError(
'Use the `ssh-rsync` write extension to deploy upgrades to an '
'existing remote system.')
location = args[0]
self.check_location(location)
self.check_ostree_parameters()
def check_location(self, location):
repo = OSTree.Repo.new(Gio.File.new_for_path(location))
try:
repo.open()
except GLib.GError as e:
logging.debug("Error from OSTree: %s", e)
if 'No such file or directory' in e.message:
raise writeexts.ExtensionError(
"OSTree repo %s was not found." % location)
else:
raise writeexts.ExtensionError(
"Error opening OSTree repo %s: %s" % (location, e))
def check_ostree_parameters(self):
required = ['OSTREE_BRANCH', 'OSTREE_COMMIT_SUBJECT']
for var in required:
if os.environ.get(var, '') == '':
raise writeexts.ExtensionError('%s was not given' % var)
OSTreeCheckExtension().run()
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