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from __future__ import annotations import logging import os from configparser import ConfigParser from pathlib import Path from typing import ClassVar from platformdirs import user_config_dir from .convert import convert class IniConfig: VIRTUALENV_CONFIG_FILE_ENV_VAR: ClassVar[str] = "VIRTUALENV_CONFIG_FILE" STATE: ClassVar[dict[bool | None, str]] = {None: "failed to parse", True: "active", False: "missing"} section = "virtualenv" def __init__(self, env=None) -> None: env = os.environ if env is None else env config_file = env.get(self.VIRTUALENV_CONFIG_FILE_ENV_VAR, None) self.is_env_var = config_file is not None if config_file is None: config_file = Path(user_config_dir(appname="virtualenv", appauthor="pypa")) / "virtualenv.ini" else: config_file = Path(config_file) self.config_file = config_file self._cache = {} exception = None self.has_config_file = None try: self.has_config_file = self.config_file.exists() except OSError as exc: exception = exc else: if self.has_config_file: self.config_file = self.config_file.resolve() self.config_parser = ConfigParser() try: self._load() self.has_virtualenv_section = self.config_parser.has_section(self.section) except Exception as exc: # noqa: BLE001 exception = exc if exception is not None: logging.error("failed to read config file %s because %r", config_file, exception) def _load(self): with self.config_file.open("rt", encoding="utf-8") as file_handler: return self.config_parser.read_file(file_handler) def get(self, key, as_type): cache_key = key, as_type if cache_key in self._cache: return self._cache[cache_key] try: source = "file" raw_value = self.config_parser.get(self.section, key.lower()) value = convert(raw_value, as_type, source) result = value, source except Exception: # noqa: BLE001 result = None self._cache[cache_key] = result return result def __bool__(self) -> bool: return bool(self.has_config_file) and bool(self.has_virtualenv_section) @property def epilog(self): return ( f"\nconfig file {self.config_file} {self.STATE[self.has_config_file]} " f"(change{'d' if self.is_env_var else ''} via env var {self.VIRTUALENV_CONFIG_FILE_ENV_VAR})" )
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