diskimage-builder/diskimage_builder/block_device/__init__.py

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# Copyright 2016-2017 Andreas Florath (andreas@florath.net)
#
# 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 argparse
from diskimage_builder.block_device.blockdevice import BlockDevice
from diskimage_builder import logging_config
import logging
def val_else_none(s):
return s if s is None or len(s) > 0 else None
def generate_phase_doc():
phase_doc = ""
bdattrs = dir(BlockDevice)
for attr in bdattrs:
if attr.startswith("cmd_"):
phase_doc += " '" + attr[4:] + "'\n"
method = getattr(BlockDevice, attr, None)
# The first line is the line that is used
phase_doc += " " + method.__doc__.split("\n")[0] + "\n"
return phase_doc
def main():
logging_config.setup()
logger = logging.getLogger(__name__)
phase_doc = generate_phase_doc()
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
description="Create block device layer",
epilog="Available phases:\n" + phase_doc)
parser.add_argument('--phase', required=True,
help="phase to execute")
parser.add_argument('--params', required=True,
help="parameters for block device handling")
parser.add_argument('--symbol', required=False,
help="symbol to query for getval")
args = parser.parse_args()
logger.info("phase [%s]" % args.phase)
logger.info("params [%s]" % args.params)
if args.symbol:
logger.info("symbol [%s]" % args.symbol)
bd = BlockDevice(args)
# Check if the method is available
method = getattr(bd, "cmd_" + args.phase, None)
if callable(method):
# If so: call it.
return method()
else:
logger.error("phase [%s] does not exists" % args.phase)
return 1
return 0
if __name__ == "__main__":
main()