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#!/usr/bin/env python -tt
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (c) 2016 Intel, Inc.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; version 2 of the License
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# DESCRIPTION
# This module provides parser for kickstart format
#
# AUTHORS
# Ed Bartosh <ed.bartosh> (at] linux.intel.com>
"""Kickstart parser module."""
import os
import shlex
from argparse import ArgumentParser, ArgumentError, ArgumentTypeError
from wic import msger
from wic.partition import Partition
from wic.utils.misc import find_canned
class KickStartError(Exception):
"""Custom exception."""
pass
class KickStartParser(ArgumentParser):
"""
This class overwrites error method to throw exception
instead of producing usage message(default argparse behavior).
"""
def error(self, message):
raise ArgumentError(None, message)
def sizetype(arg):
"""
Custom type for ArgumentParser
Converts size string in <num>[K|k|M|G] format into the integer value
"""
if arg.isdigit():
return int(arg) * 1024
if not arg[:-1].isdigit():
raise ArgumentTypeError("Invalid size: %r" % arg)
size = int(arg[:-1])
if arg.endswith("k") or arg.endswith("K"):
return size
if arg.endswith("M"):
return size * 1024
if arg.endswith("G"):
return size * 1024 * 1024
raise ArgumentTypeError("Invalid size: %r" % arg)
def overheadtype(arg):
"""
Custom type for ArgumentParser
Converts overhead string to float and checks if it's bigger than 1.0
"""
try:
result = float(arg)
except ValueError:
raise ArgumentTypeError("Invalid value: %r" % arg)
if result < 1.0:
raise ArgumentTypeError("Overhead factor should be > 1.0" % arg)
return result
def cannedpathtype(arg):
"""
Custom type for ArgumentParser
Tries to find file in the list of canned wks paths
"""
scripts_path = os.path.abspath(os.path.dirname(__file__) + '../../..')
result = find_canned(scripts_path, arg)
if not result:
raise ArgumentTypeError("file not found: %s" % arg)
return result
def systemidtype(arg):
"""
Custom type for ArgumentParser
Checks if the argument sutisfies system id requirements,
i.e. if it's one byte long integer > 0
"""
error = "Invalid system type: %s. must be hex "\
"between 0x1 and 0xFF" % arg
try:
result = int(arg, 16)
except ValueError:
raise ArgumentTypeError(error)
if result <= 0 or result > 0xff:
raise ArgumentTypeError(error)
return arg
class KickStart():
""""Kickstart parser implementation."""
def __init__(self, confpath):
self.partitions = []
self.bootloader = None
self.lineno = 0
self.partnum = 0
parser = KickStartParser()
subparsers = parser.add_subparsers()
part = subparsers.add_parser('part')
part.add_argument('mountpoint', nargs='?')
part.add_argument('--active', action='store_true')
part.add_argument('--align', type=int)
part.add_argument("--extra-space", type=sizetype, default=10*1024)
part.add_argument('--fsoptions', dest='fsopts')
part.add_argument('--fstype')
part.add_argument('--label')
part.add_argument('--no-table', action='store_true')
part.add_argument('--ondisk', '--ondrive', dest='disk')
part.add_argument("--overhead-factor", type=overheadtype, default=1.3)
part.add_argument('--part-type')
part.add_argument('--rootfs-dir')
part.add_argument('--size', type=sizetype, default=0)
part.add_argument('--source')
part.add_argument('--sourceparams')
part.add_argument('--system-id', type=systemidtype)
part.add_argument('--use-uuid', action='store_true')
part.add_argument('--uuid')
bootloader = subparsers.add_parser('bootloader')
bootloader.add_argument('--append')
bootloader.add_argument('--configfile')
bootloader.add_argument('--ptable', choices=('msdos', 'gpt'),
default='msdos')
bootloader.add_argument('--timeout', type=int)
bootloader.add_argument('--source')
include = subparsers.add_parser('include')
include.add_argument('path', type=cannedpathtype)
self._parse(parser, confpath)
if not self.bootloader:
msger.warning('bootloader config not specified, using defaults')
self.bootloader = bootloader.parse_args([])
def _parse(self, parser, confpath):
"""
Parse file in .wks format using provided parser.
"""
with open(confpath) as conf:
lineno = 0
for line in conf:
line = line.strip()
lineno += 1
if line and line[0] != '#':
try:
parsed = parser.parse_args(shlex.split(line))
except ArgumentError as err:
raise KickStartError('%s:%d: %s' % \
(confpath, lineno, err))
if line.startswith('part'):
self.partnum += 1
self.partitions.append(Partition(parsed, self.partnum))
elif line.startswith('include'):
self._parse(parser, parsed.path)
elif line.startswith('bootloader'):
if not self.bootloader:
self.bootloader = parsed
else:
err = "%s:%d: more than one bootloader specified" \
% (confpath, lineno)
raise KickStartError(err)
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