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# Copyright (c) 2024 SUSE Software Solutions Germany GmbH. All rights reserved.
#
# This file is part of kiwi.
#
# kiwi 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, either version 3 of the License, or
# (at your option) any later version.
#
# kiwi 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 kiwi. If not, see <http://www.gnu.org/licenses/>
#
import csv
from io import TextIOWrapper
from typing import Iterable
# project
from kiwi.exceptions import KiwiOSReleaseImportError
class OsRelease:
"""
**Read os-release information**
"""
def __init__(self, root_dir: str):
self.data = {}
os_release = root_dir + '/etc/os-release'
try:
with open(os_release) as osdata:
reader = csv.reader(OsRelease._rip(osdata), delimiter='=')
self.data = dict(reader)
except Exception as issue:
raise KiwiOSReleaseImportError(
f'Import of {os_release} failed with {issue}'
)
@staticmethod
def _is_comment(line: str) -> bool:
return line.startswith('#')
@staticmethod
def _is_whitespace(line: str) -> bool:
return line.isspace()
@staticmethod
def _rip(csvfile: TextIOWrapper) -> Iterable[str]:
for row in csvfile:
if not OsRelease._is_comment(row) \
and not OsRelease._is_whitespace(row):
yield row
def get(self, key: str) -> str:
"""
Return value for key or an empty string if not present
:param string key: key name from os-release
"""
return self.data.get(key) or ''
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