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#! /usr/bin/python -u
# Copyright 2013 Canonical Ltd. This software is licensed under the
# GNU Affero General Public License version 3 (see the file LICENSE).
"""A script that builds a live file system."""
__metaclass__ = type
from optparse import OptionParser
import os
import re
import subprocess
import sys
import traceback
RETCODE_SUCCESS = 0
RETCODE_FAILURE_INSTALL = 200
RETCODE_FAILURE_BUILD = 201
def get_build_path(build_id, *extra):
"""Generate a path within the build directory.
:param build_id: the build id to use.
:param extra: the extra path segments within the build directory.
:return: the generated path.
"""
return os.path.join(os.environ["HOME"], "build-" + build_id, *extra)
non_meta_re = re.compile(r'^[a-zA-Z0-9+,./:=@_-]+$')
def shell_escape(arg):
if non_meta_re.match(arg):
return arg
else:
return "'%s'" % arg.replace("'", "'\\''")
linux32_arches = [
"armel",
"armhf",
"hppa",
"i386",
"lpia",
"mips",
"mipsel",
"powerpc",
"s390",
"sparc",
]
linux64_arches = [
"alpha",
"amd64",
"arm64",
"hppa64",
"ia64",
"ppc64",
"ppc64el",
"s390x",
"sparc64",
"x32",
]
class LiveFSBuilder:
"""Builds a live file system."""
def __init__(self, options):
self.options = options
self.chroot_path = get_build_path(
self.options.build_id, 'chroot-autobuild')
def chroot(self, args, echo=False):
"""Run a command in the chroot.
:param args: the command and arguments to run.
"""
if self.options.arch in linux32_arches:
args = ["linux32"] + args
elif self.options.arch in linux64_arches:
args = ["linux64"] + args
if echo:
print "Running in chroot: %s" % ' '.join(
"'%s'" % arg for arg in args)
sys.stdout.flush()
subprocess.check_call([
"/usr/bin/sudo", "/usr/sbin/chroot", self.chroot_path] + args)
def run_build_command(self, args, env=None, echo=False):
"""Run a build command in the chroot.
This is unpleasant because we need to run it in /build under sudo
chroot, and there's no way to do this without either a helper
program in the chroot or unpleasant quoting. We go for the
unpleasant quoting.
:param args: the command and arguments to run.
:param env: dictionary of additional environment variables to set.
"""
args = [shell_escape(arg) for arg in args]
if env:
args = ["env"] + [
"%s=%s" % (key, shell_escape(value))
for key, value in env.items()] + args
command = "cd /build && %s" % " ".join(args)
self.chroot(["/bin/sh", "-c", command], echo=echo)
def install(self):
self.chroot(["apt-get", "-y", "install", "livecd-rootfs"])
if self.options.arch == "i386":
self.chroot([
"apt-get", "-y", "--no-install-recommends", "install",
"ltsp-server",
])
if self.options.locale is not None:
self.chroot([
"apt-get", "-y", "--install-recommends", "install",
"ubuntu-defaults-builder",
])
def build(self):
if self.options.locale is not None:
self.run_build_command([
"ubuntu-defaults-image",
"--locale", self.options.locale,
"--arch", self.options.arch,
"--release", self.options.series,
])
else:
self.run_build_command(["rm", "-rf", "auto"])
self.run_build_command(["mkdir", "-p", "auto"])
for lb_script in ("config", "build", "clean"):
lb_script_path = os.path.join(
"/usr/share/livecd-rootfs/live-build/auto", lb_script)
self.run_build_command(["ln", "-s", lb_script_path, "auto/"])
self.run_build_command(["lb", "clean", "--purge"])
base_lb_env = {
"PROJECT": self.options.project,
"ARCH": self.options.arch,
}
if self.options.subproject is not None:
base_lb_env["SUBPROJECT"] = self.options.subproject
if self.options.subarch is not None:
base_lb_env["SUBARCH"] = self.options.subarch
lb_env = dict(base_lb_env)
lb_env["SUITE"] = self.options.series
if self.options.datestamp is not None:
lb_env["NOW"] = self.options.datestamp
if self.options.image_format is not None:
lb_env["IMAGEFORMAT"] = self.options.image_format
if self.options.proposed:
lb_env["PROPOSED"] = "1"
if self.options.extra_ppas:
lb_env["EXTRA_PPAS"] = " ".join(self.options.extra_ppas)
self.run_build_command(["lb", "config"], env=lb_env)
self.run_build_command(["lb", "build"], env=base_lb_env)
def main():
parser = OptionParser()
parser.add_option("--build-id", help="build identifier")
parser.add_option(
"--arch", metavar="ARCH", help="build for architecture ARCH")
parser.add_option(
"--subarch", metavar="SUBARCH",
help="build for subarchitecture SUBARCH")
parser.add_option(
"--project", metavar="PROJECT", help="build for project PROJECT")
parser.add_option(
"--subproject", metavar="SUBPROJECT",
help="build for subproject SUBPROJECT")
parser.add_option(
"--series", metavar="SERIES", help="build for series SERIES")
parser.add_option("--datestamp", help="date stamp")
parser.add_option(
"--image-format", metavar="FORMAT", help="produce an image in FORMAT")
parser.add_option(
"--proposed", default=False, action="store_true",
help="enable use of -proposed pocket")
parser.add_option(
"--locale", metavar="LOCALE",
help="use ubuntu-defaults-image to build an image for LOCALE")
parser.add_option(
"--extra-ppa", dest="extra_ppas", default=[], action="append",
help="use this additional PPA")
options, _ = parser.parse_args()
builder = LiveFSBuilder(options)
try:
builder.install()
except Exception:
traceback.print_exc()
return RETCODE_FAILURE_INSTALL
try:
builder.build()
except Exception:
traceback.print_exc()
return RETCODE_FAILURE_BUILD
return RETCODE_SUCCESS
if __name__ == "__main__":
sys.exit(main())
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