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config.py

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config.py
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18/39
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NameLinesConditionals
config.py
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Source

osm_pla/config/config.py

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# -*- coding: utf-8 -*-




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# Copyright 2020 ArctosLabs Scandinavia AB




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#




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# Licensed under the Apache License, Version 2.0 (the "License");




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# you may not use this file except in compliance with the License.




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# You may obtain a copy of the License at




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#




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#    http://www.apache.org/licenses/LICENSE-2.0




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#




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# Unless required by applicable law or agreed to in writing, software




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# distributed under the License is distributed on an "AS IS" BASIS,




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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or




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# implied.




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# See the License for the specific language governing permissions and




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# limitations under the License.




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"""Global configuration managed by environment variables."""




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import logging




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import os




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import pkg_resources




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import yaml




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logger = logging.getLogger(__name__)




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class Config:




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    def __init__(self, config_file: str = ""):




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        self.conf = {}




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        self._read_config_file(config_file)




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        self._read_env()




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    def _read_config_file(self, config_file):




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        if not config_file:




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            path = "pla.yaml"




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            config_file = pkg_resources.resource_filename(__name__, path)




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        with open(config_file) as f:




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            self.conf = yaml.safe_load(f)




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    def _read_env(self):




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        for env in os.environ:




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            if not env.startswith("OSMPLA_"):




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                continue




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            elements = env.lower().split("_")




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            if len(elements) < 3:




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                logger.warning(




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                    "Environment variable %s=%s does not comply with required format. Section and/or field missing.",




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                    env,




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                    os.getenv(env),




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                )




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                continue




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            section = elements[1]




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            field = "_".join(elements[2:])




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            value = os.getenv(env)




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            if section not in self.conf:




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                self.conf[section] = {}




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            self.conf[section][field] = value




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    def get(self, section, field=None):




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        if not field:




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            return self.conf[section]




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        return self.conf[section][field]




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    def set(self, section, field, value):




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        if section not in self.conf:




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            self.conf[section] = {}




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        self.conf[section][field] = value