| # -*- coding: utf-8 -*- |
| # Copyright 2020 ArctosLabs Scandinavia AB |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or |
| # implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| """Global configuration managed by environment variables.""" |
| |
| import logging |
| import os |
| |
| import pkg_resources |
| import yaml |
| |
| logger = logging.getLogger(__name__) |
| |
| |
| class Config: |
| def __init__(self, config_file: str = ''): |
| self.conf = {} |
| self._read_config_file(config_file) |
| self._read_env() |
| |
| def _read_config_file(self, config_file): |
| if not config_file: |
| path = 'pla.yaml' |
| config_file = pkg_resources.resource_filename(__name__, path) |
| with open(config_file) as f: |
| self.conf = yaml.load(f) |
| |
| def _read_env(self): |
| for env in os.environ: |
| if not env.startswith("OSMPLA_"): |
| continue |
| elements = env.lower().split("_") |
| if len(elements) < 3: |
| logger.warning( |
| "Environment variable %s=%s does not comply with required format. Section and/or field missing.", |
| env, os.getenv(env)) |
| continue |
| section = elements[1] |
| field = '_'.join(elements[2:]) |
| value = os.getenv(env) |
| if section not in self.conf: |
| self.conf[section] = {} |
| self.conf[section][field] = value |
| |
| def get(self, section, field=None): |
| if not field: |
| return self.conf[section] |
| return self.conf[section][field] |
| |
| def set(self, section, field, value): |
| if section not in self.conf: |
| self.conf[section] = {} |
| self.conf[section][field] = value |