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from __future__ import absolute_import, unicode_literals
import logging
import os
from platformdirs import user_config_dir
from virtualenv.info import PY3
from virtualenv.util import ConfigParser
from virtualenv.util.path import Path
from virtualenv.util.six import ensure_str
from .convert import convert
class IniConfig(object):
VIRTUALENV_CONFIG_FILE_ENV_VAR = ensure_str("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
config_file = (
Path(config_file)
if config_file is not None
else Path(user_config_dir(appname="virtualenv", appauthor="pypa")) / "virtualenv.ini"
)
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.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") as file_handler:
reader = getattr(self.config_parser, "read_file" if PY3 else "readfp")
reader(file_handler)
def get(self, key, as_type):
cache_key = key, as_type
if cache_key in self._cache:
return self._cache[cache_key]
# noinspection PyBroadException
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):
msg = "{}config file {} {} (change{} via env var {})"
return msg.format(
"\n",
self.config_file,
self.STATE[self.has_config_file],
"d" if self.is_env_var else "",
self.VIRTUALENV_CONFIG_FILE_ENV_VAR,
)