| #!/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) |