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import logging
import os
from configparser import ConfigParser
from pathlib import Path
from platformdirs import user_config_dir
from .convert import convert
class IniConfig:
VIRTUALENV_CONFIG_FILE_ENV_VAR = "VIRTUALENV_CONFIG_FILE"
STATE = {None: "failed to parse", True: "active", False: "missing"}
section = "virtualenv"
def __init__(self, env=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:
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:
result = None
self._cache[cache_key] = result
return result
def __bool__(self):
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})"
)