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# ========================================================================== #
# #
# KVMD - The main PiKVM daemon. #
# #
# Copyright (C) 2018-2021 Maxim Devaev <[email protected]> #
# #
# 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, either version 3 of the License, or #
# (at your option) any later version. #
# #
# 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, see <https://www.gnu.org/licenses/>. #
# #
# ========================================================================== #
import os
from typing import IO
from typing import Any
import yaml
import yaml.nodes
import yaml.resolver
import yaml.constructor
from .. import tools
# =====
def load_yaml_file(path: str) -> Any:
with open(path) as yaml_file:
try:
return yaml.load(yaml_file, _YamlLoader)
except Exception as err:
# Reraise internal exception as standard ValueError and show the incorrect file
raise ValueError(f"Invalid YAML in the file {path!r}:\n{tools.efmt(err)}") from None
# =====
class _YamlLoader(yaml.SafeLoader):
def __init__(self, yaml_file: IO) -> None:
super().__init__(yaml_file)
self.__root = os.path.dirname(yaml_file.name)
def include(self, node: yaml.nodes.ScalarNode) -> Any:
path = os.path.join(self.__root, str(self.construct_scalar(node)))
return load_yaml_file(path)
_YamlLoader.add_constructor("!include", _YamlLoader.include)
# =====
def _disable_some_bools() -> None:
# https://stackoverflow.com/questions/36463531
resolvers = yaml.resolver.Resolver.yaml_implicit_resolvers
for key in "oOyYnN":
resolvers[key] = [
resolver
for resolver in resolvers[key]
if resolver[0] != "tag:yaml.org,2002:bool"
]
if len(resolvers) == 0:
del resolvers[key]
_disable_some_bools()
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