/usr/lib/python3/dist-packages/freedommaker/vmdebootstrap.py is in freedom-maker 0.12.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# This file is part of Freedom Maker.
#
# 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/>.
#
"""
Basic image builder using vmdebootstrap.
"""
import json
import logging
import shutil
import subprocess
logger = logging.getLogger(__name__)
class VmdebootstrapBuilderBackend():
"""Build an image using vmdebootstrap tool."""
def __init__(self, builder):
"""Initialize the builder."""
self.builder = builder
self.parameters = []
self.environment = []
self.execution_wrapper = []
def make_image(self):
"""Create a disk image."""
if self.builder.should_skip_step(self.builder.image_file):
logger.info('Image exists, skipping build - %s',
self.builder.image_file)
return
temp_image_file = self.builder.get_temp_image_file()
logger.info('Building image in temporary file - %s', temp_image_file)
self.execution_wrapper = ['sudo', '-H']
self.parameters = [
'--hostname',
self.builder.arguments.hostname,
'--image',
temp_image_file,
'--size',
self.builder.arguments.image_size,
'--mirror',
self.builder.arguments.build_mirror,
'--distribution',
self.builder.arguments.distribution,
'--arch',
self.builder.architecture,
'--lock-root-password',
'--log',
self.builder.log_file,
'--log-level',
self.builder.arguments.log_level,
'--verbose',
'--customize',
self.builder.customization_script,
]
self.environment = {
'MIRROR': self.builder.arguments.mirror,
'BUILD_MIRROR': self.builder.arguments.build_mirror,
'MACHINE': self.builder.machine,
'SOURCE': 'true'
if self.builder.arguments.download_source else 'false',
'SOURCE_IN_IMAGE': 'true'
if self.builder.arguments.include_source else 'false',
'SUITE': self.builder.arguments.distribution,
'ENABLE_NONFREE': 'no' if self.builder.free else 'yes',
}
self.process_variant()
self.process_architecture()
self.process_boot_loader()
self.process_kernel_flavor()
self.process_filesystems()
self.process_packages()
self.process_custom_packages()
self.process_environment()
command = self.execution_wrapper + [
self.builder.arguments.vmdebootstrap
] + self.parameters
try:
self.builder._run(command)
finally:
self._cleanup_vmdebootstrap(temp_image_file)
logger.info('Moving file: %s -> %s', temp_image_file,
self.builder.image_file)
self.builder._run(
['sudo', 'mv', temp_image_file, self.builder.image_file])
def _cleanup_vmdebootstrap(self, image_file):
"""Cleanup those that vmdebootstrap is supposed to have cleaned up."""
# XXX: Remove this when vmdebootstrap removes kpartx mappings properly
# after a successful build.
process = subprocess.run(['/sbin/losetup', '--json'],
stdout=subprocess.PIPE,
check=True)
output = process.stdout.decode()
if not output:
return
loop_data = json.loads(output)
loop_device = None
for device_data in loop_data['loopdevices']:
if image_file == device_data['back-file']:
loop_device = device_data['name']
break
if not loop_device:
return
partition_devices = [
'/dev/mapper/' + loop_device.split('/')[-1] + 'p' + str(number)
for number in range(1, 4)
]
# Don't log command, ignore errors, force
for device in partition_devices:
subprocess.run(['sudo', 'dmsetup', 'remove', '-f', device])
subprocess.run(['sudo', 'losetup', '-d', loop_device])
def process_variant(self):
"""Add paramaters for deboostrap variant."""
if self.builder.debootstrap_variant:
self.parameters += [
'--debootstrapopts',
'variant=' + self.builder.debootstrap_variant
]
def process_architecture(self):
"""Add parameters specific to the architecture."""
if self.builder.architecture not in ('i386', 'amd64'):
self.parameters += ['--foreign', '/usr/bin/qemu-arm-static']
# Using taskset to pin build process to single core. This
# is a workaround for a qemu-user-static issue that causes
# builds to hang. (See Debian bug #769983 for details.)
self.execution_wrapper = \
['taskset', '0x01'] + self.execution_wrapper
def process_boot_loader(self):
"""Add parameters related to boot loader."""
option_map = {
'grub': ['--grub'],
'u-boot': ['--no-extlinux'],
None: ['--no-extlinux']
}
self.parameters += option_map[self.builder.boot_loader]
if self.builder.boot_loader == 'u-boot':
self.parameters += [
'--package', 'u-boot-tools', '--package', 'u-boot'
]
if self.builder.boot_size:
self.parameters += ['--bootsize', self.builder.boot_size]
if self.builder.boot_offset:
self.parameters += ['--bootoffset', self.builder.boot_offset]
def process_kernel_flavor(self):
"""Add parameters for kernel flavor."""
if self.builder.kernel_flavor == 'default':
return
if self.builder.kernel_flavor is None:
self.parameters += ['--no-kernel']
return
self.parameters += [
'--kernel-package', 'linux-image-' + self.builder.kernel_flavor
]
def process_filesystems(self):
"""Add parameters necessary for file systems."""
self.parameters += ['--roottype', self.builder.root_filesystem_type]
if self.builder.boot_filesystem_type:
self.parameters += [
'--boottype', self.builder.boot_filesystem_type
]
if 'btrfs' in [
self.builder.root_filesystem_type,
self.builder.boot_filesystem_type
]:
self.builder.packages += ['btrfs-progs']
def process_packages(self):
"""Add parameters for additional packages to install in image."""
for package in self.builder.packages + (self.builder.arguments.package
or []):
self.parameters += ['--package', package]
def process_custom_packages(self):
"""Add parameters for custom DEB packages to install in image."""
for package in (self.builder.arguments.custom_package or []):
if 'plinth_' in package:
self.environment['CUSTOM_PLINTH'] = package
elif 'freedombox-setup_' in package:
self.environment['CUSTOM_SETUP'] = package
else:
self.parameters += ['--custom-package', package]
def process_environment(self):
"""Add environment we wish to pass to the command wrapper: sudo."""
for key, value in self.environment.items():
self.execution_wrapper += [key + '=' + value]
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