3d48a528c1
Block device handling can be somewhat complex - especially when taking things like md, lvm or encryption into account. This patch factors out the creation and deletion of the local loop image device handling into a python library. The main propose of this patch is to implement the needed infrastructure. Based on this, more advanced functions can be added. Example: (advanced) partitioning, LVM, handling different boot scenarios (BIOS, UEFI, ...), possibility of handling multiple images (local loop image, iSCSI, physical hard disk, ...), handling of different filesystems for different partitions / LVs. Change-Id: Ib626b36a00f8a5dc3dbde8df3e2619a2438eaaf1 Signed-off-by: Andreas Florath <andreas@florath.net>
81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
# Copyright 2016 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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from diskimage_builder.block_device.blockdevice import BlockDevice
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from diskimage_builder import logging_config
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import logging
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def val_else_none(s):
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return s if s is None or len(s) > 0 else None
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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('--config', required=False,
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help="configuration for block device "
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"layer as JSON object")
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parser.add_argument('--build-dir', required=True,
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help="path to temporary build dir")
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parser.add_argument('--image-size', required=False,
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help="default image size")
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parser.add_argument('--image-dir', required=False,
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help="default image directory")
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args = parser.parse_args()
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logger.info("phase [%s]" % args.phase)
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logger.info("config [%s]" % args.config)
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logger.info("build_dir [%s]" % args.build_dir)
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bd = BlockDevice(val_else_none(args.config),
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val_else_none(args.build_dir),
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val_else_none(args.image_size),
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val_else_none(args.image_dir))
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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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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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