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#!/usr/bin/python3
#
# Copyright (C) 2018 Canonical, Ltd.
# Author: Mathieu Trudel-Lapierre <mathieu.trudel-lapierre@canonical.com>
#
# 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 3.
#
# 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/>.
'''netplan generate command line'''
import logging
import os
import sys
import subprocess
import shutil
import netplan.cli.utils as utils
class NetplanGenerate(utils.NetplanCommand):
def __init__(self):
super().__init__(command_id='generate',
description='Generate backend specific configuration files'
' from /etc/netplan/*.yaml',
leaf=True)
def run(self):
self.parser.add_argument('--root-dir',
help='Search for and generate configuration files in this root directory instead of /')
self.parser.add_argument('--mapping',
help='Display the netplan device ID/backend/interface name mapping and exit.')
self.func = self.command_generate
self.parse_args()
self.run_command()
def command_generate(self):
# if we are inside a snap, then call dbus to run netplan apply instead
if "SNAP" in os.environ:
# TODO: maybe check if we are inside a classic snap and don't do
# this if we are in a classic snap?
busctl = shutil.which("busctl")
if busctl is None:
raise RuntimeError("missing busctl utility") # pragma: nocover
# XXX: DO NOT TOUCH or change this API call, it is used by snapd to communicate
# using core20 netplan binary/client/CLI on core18 base systems. Any change
# must be agreed upon with the snapd team, so we don't break support for
# base systems running older netplan versions.
# https://github.com/snapcore/snapd/pull/10212
res = subprocess.call([busctl, "call", "--quiet", "--system",
"io.netplan.Netplan", # the service
"/io/netplan/Netplan", # the object
"io.netplan.Netplan", # the interface
"Generate", # the method
])
if res != 0:
if res == 130:
raise PermissionError(
"failed to communicate with dbus service")
else:
raise RuntimeError(
"failed to communicate with dbus service: error %s" % res)
else:
return
argv = [utils.get_generator_path()]
if self.root_dir:
argv += ['--root-dir', self.root_dir]
if self.mapping:
argv += ['--mapping', self.mapping]
logging.debug('command generate: running %s', argv)
# FIXME: os.execv(argv[0], argv) would be better but fails coverage
sys.exit(subprocess.call(argv))