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-rwxr-xr-xrawdisk.write104
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-#!/usr/bin/python
-# Copyright (C) 2012-2013 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, write to the Free Software Foundation, Inc.,
-# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
-
-
-'''A Morph deployment write extension for raw disk images.'''
-
-
-import cliapp
-import os
-import sys
-import time
-import tempfile
-
-import morphlib.writeexts
-
-
-class RawDiskWriteExtension(morphlib.writeexts.WriteExtension):
-
- '''Create a raw disk image during Morph's deployment.
-
- If the image already exists, it is upgraded.
-
- The location command line argument is the pathname of the disk image
- to be created/upgraded.
-
- '''
-
- def process_args(self, args):
- if len(args) != 2:
- raise cliapp.AppException('Wrong number of command line args')
-
- temp_root, location = args
- if os.path.isfile(location):
- self.upgrade_local_system(location, temp_root)
- else:
- self.create_local_system(temp_root, location)
- self.status(msg='Disk image has been created at %s' % location)
-
- def upgrade_local_system(self, raw_disk, temp_root):
- mp = self.mount(raw_disk)
-
- version_label = self.get_version_label(mp)
- self.status(msg='Updating image to a new version with label %s' %
- version_label)
-
- version_root = os.path.join(mp, 'systems', version_label)
- os.mkdir(version_root)
-
- old_orig = os.path.join(mp, 'systems', 'factory', 'orig')
- new_orig = os.path.join(version_root, 'orig')
- cliapp.runcmd(
- ['btrfs', 'subvolume', 'snapshot', old_orig, new_orig])
-
- cliapp.runcmd(
- ['rsync', '-a', '--checksum', '--numeric-ids', '--delete',
- temp_root + os.path.sep, new_orig])
-
- self.create_run(version_root)
-
- default_path = os.path.join(mp, 'systems', 'default')
- if os.path.exists(default_path):
- os.remove(default_path)
- else:
- # we are upgrading and old system that does
- # not have an updated extlinux config file
- if self.bootloader_is_wanted():
- self.install_extlinux(mp)
- os.symlink(version_label, default_path)
-
- if self.bootloader_is_wanted():
- self.install_kernel(version_root, temp_root)
-
- self.unmount(mp)
-
- def get_version_label(self, mp):
- version_label = os.environ.get('VERSION_LABEL')
-
- if version_label is None:
- self.unmount(mp)
- raise cliapp.AppException('VERSION_LABEL was not given')
-
- if os.path.exists(os.path.join(mp, 'systems', version_label)):
- self.unmount(mp)
- raise cliapp.AppException('VERSION_LABEL %s already exists'
- % version_label)
-
- return version_label
-
-
-RawDiskWriteExtension().run()
-