75817ef205
This switches the code to use networkx for the digraph implementation. Note that the old implementation specifically isn't removed in this change -- for review clarity. It will be replaced by a base class that defines things properly to the API described below. Plugins return a node object with three functions get_name() : return the unique name of this node get_nodes() : return a list of nodes for insertion into the graph. Usually this is just "self". Some special things like partitioning add extra nodes at this point, however. get_edges() : return a tuple of two lists; edges_from and edges_to As you would expect the first is a list of node names that points to us, and the second is a list of node names we point to. Usually this is only populated as ([self.base],[]) -- i.e. our "base" node points to us. Some plugins, such as mounting, create links both to and from themselves, however. Plugins have been updated, some test cases added (error cases specifically) Change-Id: Ic5a61365ef0132476b11bdbf1dd96885e91c3cb6
91 lines
2.6 KiB
Python
91 lines
2.6 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import logging
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from diskimage_builder.block_device.exception import \
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BlockDeviceSetupException
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from diskimage_builder.graph.digraph import Digraph
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logger = logging.getLogger(__name__)
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class Partition(Digraph.Node):
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type_string = "partitions"
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flag_boot = 1
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flag_primary = 2
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def __init__(self, config, parent, prev_partition):
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if 'name' not in config:
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raise BlockDeviceSetupException(
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"Missing 'name' in partition config: %s" % config)
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self.name = config['name']
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Digraph.Node.__init__(self, self.name)
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self.base = config['base']
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self.partitioning = parent
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self.prev_partition = prev_partition
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self.flags = set()
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if 'flags' in config:
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for f in config['flags']:
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if f == 'boot':
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self.flags.add(self.flag_boot)
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elif f == 'primary':
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self.flags.add(self.flag_primary)
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else:
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raise BlockDeviceSetupException("Unknown flag: %s" % f)
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if 'size' not in config:
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raise BlockDeviceSetupException("No size in partition" % self.name)
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self.size = config['size']
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self.ptype = int(config['type'], 16) if 'type' in config else 0x83
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def get_flags(self):
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return self.flags
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def get_size(self):
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return self.size
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def get_type(self):
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return self.ptype
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def get_name(self):
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return self.name
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def get_edges(self):
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edge_from = [self.base]
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edge_to = []
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if self.prev_partition is not None:
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edge_from.append(self.prev_partition.name)
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return (edge_from, edge_to)
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def create(self, result, rollback):
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self.partitioning.create(result, rollback)
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def umount(self, state):
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"""Partition does not need any umount task."""
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pass
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def cleanup(self, state):
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"""Partition does not need any cleanup."""
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pass
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def delete(self, state):
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"""Partition does not need any cleanup."""
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pass
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