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84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
5 years ago
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from __future__ import absolute_import, unicode_literals
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import logging
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import os
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from appdirs import user_config_dir
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from virtualenv.info import PY3
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from virtualenv.util import ConfigParser
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from virtualenv.util.path import Path
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from virtualenv.util.six import ensure_str
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from .convert import convert
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class IniConfig(object):
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VIRTUALENV_CONFIG_FILE_ENV_VAR = ensure_str("VIRTUALENV_CONFIG_FILE")
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STATE = {None: "failed to parse", True: "active", False: "missing"}
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section = "virtualenv"
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def __init__(self):
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config_file = os.environ.get(self.VIRTUALENV_CONFIG_FILE_ENV_VAR, None)
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self.is_env_var = config_file is not None
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config_file = (
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Path(config_file)
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if config_file is not None
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else Path(user_config_dir(appname="virtualenv", appauthor="pypa")) / "virtualenv.ini"
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)
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self.config_file = config_file
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self._cache = {}
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exception = None
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self.has_config_file = None
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try:
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self.has_config_file = self.config_file.exists()
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except OSError as exc:
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exception = exc
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else:
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if self.has_config_file:
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self.config_file = self.config_file.resolve()
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self.config_parser = ConfigParser.ConfigParser()
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try:
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self._load()
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self.has_virtualenv_section = self.config_parser.has_section(self.section)
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except Exception as exc:
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exception = exc
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if exception is not None:
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logging.error("failed to read config file %s because %r", config_file, exception)
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def _load(self):
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with self.config_file.open("rt") as file_handler:
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reader = getattr(self.config_parser, "read_file" if PY3 else "readfp")
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reader(file_handler)
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def get(self, key, as_type):
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cache_key = key, as_type
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if cache_key in self._cache:
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return self._cache[cache_key]
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# noinspection PyBroadException
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try:
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source = "file"
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raw_value = self.config_parser.get(self.section, key.lower())
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value = convert(raw_value, as_type, source)
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result = value, source
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except Exception:
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result = None
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self._cache[cache_key] = result
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return result
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def __bool__(self):
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return bool(self.has_config_file) and bool(self.has_virtualenv_section)
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@property
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def epilog(self):
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msg = "{}config file {} {} (change{} via env var {})"
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return msg.format(
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os.linesep,
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self.config_file,
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self.STATE[self.has_config_file],
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"d" if self.is_env_var else "",
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self.VIRTUALENV_CONFIG_FILE_ENV_VAR,
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)
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