a06c610a8c
This moves the YAML parameter parsing into the command-line driver. It makes the argument optional so it can be taken from the environment variable directly. The parsed YAML is passed to the BlockDevice object. Change-Id: I6fa5e5b7d1fccfc7cf47d6e4a1fa6e560734680d
91 lines
2.9 KiB
Python
91 lines
2.9 KiB
Python
# Copyright 2016-2017 Andreas Florath (andreas@florath.net)
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#
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# 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 argparse
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import logging
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import os
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import sys
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import yaml
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from diskimage_builder.block_device.blockdevice import BlockDevice
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from diskimage_builder import logging_config
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def generate_phase_doc():
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phase_doc = ""
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bdattrs = dir(BlockDevice)
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for attr in bdattrs:
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if attr.startswith("cmd_"):
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phase_doc += " '" + attr[4:] + "'\n"
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method = getattr(BlockDevice, attr, None)
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# The first line is the line that is used
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phase_doc += " " + method.__doc__.split("\n")[0] + "\n"
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return phase_doc
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def main():
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logging_config.setup()
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logger = logging.getLogger(__name__)
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phase_doc = generate_phase_doc()
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parser = argparse.ArgumentParser(
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formatter_class=argparse.RawDescriptionHelpFormatter,
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description="Create block device layer",
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epilog="Available phases:\n" + phase_doc)
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parser.add_argument('--phase', required=True,
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help="phase to execute")
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parser.add_argument('--params', required=False,
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help="YAML file containing parameters for block-device"
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"handling. Default is DIB_BLOCK_DEVICE_PARAMS_YAML")
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parser.add_argument('--symbol', required=False,
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help="symbol to query for getval")
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args = parser.parse_args()
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# Find, open and parse the parameters file
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if not args.params:
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if 'DIB_BLOCK_DEVICE_PARAMS_YAML' in os.environ:
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param_file = os.environ['DIB_BLOCK_DEVICE_PARAMS_YAML']
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else:
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parser.error("DIB_BLOCK_DEVICE_PARAMS_YAML or --params not set")
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else:
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param_file = args.params
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logger.info("params [%s]" % param_file)
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try:
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with open(param_file) as f:
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params = yaml.safe_load(f)
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except Exception:
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logger.exception("Failed to open parameter YAML")
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sys.exit(1)
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logger.info("phase [%s]" % args.phase)
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if args.symbol:
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logger.info("symbol [%s]" % args.symbol)
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bd = BlockDevice(params, args)
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# Check if the method is available
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method = getattr(bd, "cmd_" + args.phase, None)
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if callable(method):
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# If so: call it.
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return method()
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else:
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logger.error("phase [%s] does not exists" % args.phase)
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return 1
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return 0
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if __name__ == "__main__":
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main()
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