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#!/usr/bin/python3
# -*- coding: utf-8 -*-
# Copyright (C) 2013 Canonical Ltd.
# Author: Stéphane Graber <stgraber@ubuntu.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 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/>.
import argparse
import glob
import lxc
import os
import stat
import shutil
import subprocess
import sys
import time
import platform
from distro_info import UbuntuDistroInfo, DistroDataOutdated
CONTAINER_NAME = "unity8-lxc"
SKIP_JOB = ["bluetooth", "lightdm", "plymouth", "plymouth-upstart-bridge",
"plymouth-shutdown", "ubiquity"]
# Argument parsing
parser = argparse.ArgumentParser(description="Unity8 inside LXC")
parser.add_argument(
"--rebuild-all", action="store_true",
help=("Wipe and replace the container rootfs."))
parser.add_argument(
"--rebuild-rootfs", action="store_true",
help=("Wipe and replace the container rootfs."))
parser.add_argument(
"--test", type=int, metavar="SECONDS", default=None,
help=("Test mode, argument is time in seconds for the session."))
parser.add_argument(
"--destroy", action="store_true",
help=("Destroy any existing environment entirely."))
parser.add_argument(
"--update-lxc", action="store_true",
help=("Update the packages in the Unity 8 desktop preview LXC."))
args = parser.parse_args()
if os.geteuid():
parser.error("This tool must be run as root.")
container = lxc.Container(CONTAINER_NAME)
container_path = "%s/%s" % (lxc.default_config_path, CONTAINER_NAME)
rootfs_path = "%s/rootfs" % container_path
(distro, version, codename) = platform.linux_distribution()
# Actions
generate_rootfs = True
def start_container(wait_for_network=True):
if not container.running:
print("Starting the container")
if not container.start():
parser.error("Unable to start the container.")
container.wait("RUNNING")
if wait_for_network and not container.get_ips(timeout=30):
print("Not able to connect to the network.")
sys.exit(0)
# Destroy a container entirely
if args.destroy and container.defined:
container.stop()
container.destroy()
sys.exit(0)
# Deal with existing containers
if container.defined:
generate_rootfs = False
if not args.test and container.running:
print("Stopping the existing container.")
container.stop()
if args.rebuild_all:
args.rebuild_rootfs = True
if args.rebuild_rootfs:
print("Deleting current unity8-lxc container...")
generate_rootfs = True
container.destroy()
del container
container = lxc.Container(CONTAINER_NAME)
#if os.path.exists(container_path):
# shutil.rmtree(container_path)
if not generate_rootfs and not args.test and not args.update_lxc:
parser.error("The container already exists.")
if generate_rootfs:
# Setup the container rootfs
## Figure out the host architecture
dpkg = subprocess.Popen(['dpkg', '--print-architecture'],
stdout=subprocess.PIPE,
universal_newlines=True)
if dpkg.wait() != 0:
parser.error("Failed to determine the local architecture.")
architecture = dpkg.stdout.read().strip()
try:
current_release = UbuntuDistroInfo().devel()
except DistroDataOutdated:
current_release = UbuntuDistroInfo().stable()
print("Creating the new unity8-lxc container...")
container.create("download", 0,
{"dist": "ubuntu",
"release": current_release,
"arch": architecture})
## Configure
print("Configuring the Unity8 LXC...")
### Generate /etc/hostname
with open(os.path.join(rootfs_path, "etc", "hostname"), "w+") as fd:
fd.write("unity8-lxc\n")
### Generate /etc/hosts
with open(os.path.join(rootfs_path, "etc", "hosts"), "w+") as fd:
fd.write("""127.0.0.1 localhost
127.0.1.1 unity8-lxc
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
""")
# Generate the package install policy override
with open(os.path.join(rootfs_path, 'usr', 'sbin', 'policy-rc.d'), 'w+') as fd:
fd.write("""#!/bin/sh
while true; do
case \"$1\" in
-*) shift ;;
makedev) exit 0;;
*) exit 101;;
esac
done
""")
fd.close()
os.chmod(os.path.join(rootfs_path, 'usr', 'sbin', 'policy-rc.d'), 0o755)
start_container()
# Copy the ubuntu-desktop-next metapackage to the rootfs
lxc_archive = os.path.join(rootfs_path, 'tmp', 'ubuntu-desktop-next.deb')
glob_name = "ubuntu-desktop-next_*_%s.deb" % architecture
metapackage = glob.glob(os.path.join('/', 'usr', 'share', 'unity8-lxc', glob_name))
shutil.copy(metapackage[0], lxc_archive)
# Remove the default ubuntu user in the container
container.attach_wait(lxc.attach_run_command,
["userdel", "-r", "ubuntu"])
container.attach_wait(lxc.attach_run_command,
["apt-get", "update"])
container.attach_wait(lxc.attach_run_command,
["dpkg", "-i", os.path.join('/', 'tmp', 'ubuntu-desktop-next.deb')])
container.attach_wait(lxc.attach_run_command,
["apt-get", "install", "-f", "-y"])
container.attach_wait(lxc.attach_run_command,
["systemctl", "disable", "lightdm.service"])
container.stop()
# Disable some upstart jobs
for job in glob.glob("%s/etc/init/*.conf" % rootfs_path):
if os.path.basename(job).rsplit(".conf", 1)[0] in SKIP_JOB:
with open("%s.override" % job.rsplit(".conf", 1)[0], "w+") as fd:
fd.write("manual")
with open(os.path.join(container_path, 'config'), 'a') as fd:
fd.write("lxc.include = " + os.path.join('/', 'usr', 'share', 'unity8-lxc', 'unity8-lxc.conf'))
fd.close()
if args.test:
# Start a test session
if not container.running:
print("Starting the container")
if not container.start():
parser.error("Unable to start the container.")
container.wait("RUNNING")
# Retrieve the current VT number
fgconsole = subprocess.Popen(['fgconsole'],
stdout=subprocess.PIPE,
universal_newlines=True)
if fgconsole.wait() != 0:
parser.error("Failed to get current VT number.")
current_vt = fgconsole.stdout.read().strip()
def start_unity8():
## Setup the environment
os.environ['HOME'] = "/root"
os.environ['QT_QPA_PLATFORM'] = "ubuntumirclient"
os.environ['XDG_RUNTIME_DIR'] = "/run/user/0/"
os.environ['DESKTOP_SESSION'] = "unity8-mir"
os.environ['UBUNTU_PLATFORM_API_BACKEND'] = "desktop_mirserver"
## Reset the config
for path in ("/root/.cache", "/root/.config", "/root/.local"):
if os.path.exists(path):
shutil.rmtree(path)
## Create runtime dir
if not os.path.exists("/run/user/0"):
os.makedirs("/run/user/0")
## Get the multiarch triplet
gcc = subprocess.Popen(['gcc', '--print-multiarch'],
stdout=subprocess.PIPE,
universal_newlines=True)
if gcc.wait() != 0:
parser.error("Failed to determine the multiarch triplet.")
triplet = gcc.stdout.read().strip()
## Run url-dispatcher
dispatcher_path = "/usr/lib/%s/url-dispatcher/" \
"update-directory" % triplet
subprocess.call([dispatcher_path, "/usr/share/url-dispatcher/urls/"])
## Start the session
unity8 = subprocess.Popen(["openvt", "-s", "-f", "-w", "-c", "12",
"--",
"init", "--user"])
time.sleep(args.test)
unity8.kill()
unity8.wait()
## Switch back to original VT
subprocess.call(["chvt", current_vt])
container.attach_wait(start_unity8)
## Stopping the container
container.stop()
if args.update_lxc:
# Update packages inside the LXC
start_container()
container.attach_wait(lxc.attach_run_command,
["umount", "/etc/localtime"])
container.attach_wait(lxc.attach_run_command,
["umount", "/etc/timezone"])
print("Updating packages inside the LXC...")
container.attach_wait(lxc.attach_run_command,
["apt-get", "update"])
container.attach_wait(lxc.attach_run_command,
["apt-get", "dist-upgrade", "-y"])
## Stopping the container
container.stop()
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