diskimage-builder/diskimage_builder/block_device/level1/partition.py
Ian Wienand deb832d685 Create and use plugin/node abstract classes
This completes the transitions started in
Ic5a61365ef0132476b11bdbf1dd96885e91c3cb6

The new file plugin.py is the place to start with this change.  The
abstract base classes PluginBase and NodeBase are heavily documented.
NodeBase essentially replaces Digraph.Node

The changes in level?/*.py make no functional changes, but are just
refactoring to implement the plugin and node classes consistently.
Additionally we have added asserts during parsing & generation to
ensure plugins are implemented PluginBase, and get_nodes() is always
returning NodeBase objects for the graph.

Change-Id: Ie648e9224749491260dea65d7e8b8151a6824b9c
2017-05-26 11:48:11 +10:00

70 lines
2.1 KiB
Python

# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import logging
from diskimage_builder.block_device.exception import \
BlockDeviceSetupException
from diskimage_builder.block_device.plugin import NodeBase
logger = logging.getLogger(__name__)
class PartitionNode(NodeBase):
flag_boot = 1
flag_primary = 2
def __init__(self, config, parent, prev_partition):
super(PartitionNode, self).__init__(config['name'])
self.base = config['base']
self.partitioning = parent
self.prev_partition = prev_partition
self.flags = set()
if 'flags' in config:
for f in config['flags']:
if f == 'boot':
self.flags.add(self.flag_boot)
elif f == 'primary':
self.flags.add(self.flag_primary)
else:
raise BlockDeviceSetupException("Unknown flag: %s" % f)
if 'size' not in config:
raise BlockDeviceSetupException("No size in partition" % self.name)
self.size = config['size']
self.ptype = int(config['type'], 16) if 'type' in config else 0x83
def get_flags(self):
return self.flags
def get_size(self):
return self.size
def get_type(self):
return self.ptype
def get_edges(self):
edge_from = [self.base]
edge_to = []
if self.prev_partition is not None:
edge_from.append(self.prev_partition.name)
return (edge_from, edge_to)
def create(self, result, rollback):
self.partitioning.create(result, rollback)