102 lines
2.7 KiB
Python
102 lines
2.7 KiB
Python
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import sys
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from os import environ
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from pathlib import Path
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from typing import Any, Dict, Optional
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from loguru import logger
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# pylint: disable=no-name-in-module
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from pydantic import BaseModel, ValidationError
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from pydantic.fields import ModelField
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from yaml import YAMLError, safe_load
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DEFAULT_ENV_PREFIX = "LIBRETIME"
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# pylint: disable=too-few-public-methods
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class BaseConfig(BaseModel):
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"""
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Read and validate the configuration from 'filepath' and os environment.
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:param filepath: yaml configuration file to read from
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:param env_prefix: prefix for the environment variable names
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:returns: configuration class
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"""
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def __init__(
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self,
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*,
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env_prefix: str = DEFAULT_ENV_PREFIX,
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filepath: Optional[Path] = None,
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) -> None:
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file_values = self._load_file_values(filepath)
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env_values = self._load_env_values(env_prefix)
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try:
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super().__init__(
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**{
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**file_values,
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**env_values,
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},
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)
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except ValidationError as error:
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logger.critical(error)
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sys.exit(1)
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def _load_env_values(self, env_prefix: str) -> Dict[str, Any]:
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return self._get_fields_from_env(env_prefix, self.__fields__)
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def _get_fields_from_env(
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self,
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env_prefix: str,
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fields: Dict[str, ModelField],
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) -> Dict[str, Any]:
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result: Dict[str, Any] = {}
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for field in fields.values():
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env_name = (env_prefix + "_" + field.name).upper()
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if field.is_complex():
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result[field.name] = self._get_fields_from_env(
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env_name,
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field.type_.__fields__,
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)
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else:
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if env_name in environ:
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result[field.name] = environ[env_name]
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return result
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# pylint: disable=no-self-use
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def _load_file_values(
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self,
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filepath: Optional[Path] = None,
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) -> Dict[str, Any]:
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if filepath is None:
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return {}
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try:
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return safe_load(filepath.read_text(encoding="utf-8"))
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except YAMLError as error:
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logger.critical(error)
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sys.exit(1)
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# pylint: disable=too-few-public-methods
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class Database(BaseModel):
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host: str = "localhost"
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port: int = 5432
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name: str = "libretime"
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user: str = "libretime"
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password: str = "libretime"
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# pylint: disable=too-few-public-methods
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class RabbitMQ(BaseModel):
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host: str = "localhost"
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port: int = 5672
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name: str = "libretime"
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user: str = "libretime"
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password: str = "libretime"
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vhost: str = "/libretime"
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