--- a/lib/python3.8/site-packages/pip/_internal/cli/base_command.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,226 +0,0 @@
-"""Base Command class, and related routines"""
-
-from __future__ import absolute_import, print_function
-
-import logging
-import logging.config
-import optparse
-import os
-import platform
-import sys
-import traceback
-
-from pip._internal.cli import cmdoptions
-from pip._internal.cli.command_context import CommandContextMixIn
-from pip._internal.cli.parser import (
-    ConfigOptionParser,
-    UpdatingDefaultsHelpFormatter,
-)
-from pip._internal.cli.status_codes import (
-    ERROR,
-    PREVIOUS_BUILD_DIR_ERROR,
-    SUCCESS,
-    UNKNOWN_ERROR,
-    VIRTUALENV_NOT_FOUND,
-)
-from pip._internal.exceptions import (
-    BadCommand,
-    CommandError,
-    InstallationError,
-    PreviousBuildDirError,
-    UninstallationError,
-)
-from pip._internal.utils.deprecation import deprecated
-from pip._internal.utils.filesystem import check_path_owner
-from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
-from pip._internal.utils.misc import get_prog, normalize_path
-from pip._internal.utils.temp_dir import global_tempdir_manager
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.utils.virtualenv import running_under_virtualenv
-
-if MYPY_CHECK_RUNNING:
-    from typing import List, Tuple, Any
-    from optparse import Values
-
-__all__ = ['Command']
-
-logger = logging.getLogger(__name__)
-
-
-class Command(CommandContextMixIn):
-    usage = None  # type: str
-    ignore_require_venv = False  # type: bool
-
-    def __init__(self, name, summary, isolated=False):
-        # type: (str, str, bool) -> None
-        super(Command, self).__init__()
-        parser_kw = {
-            'usage': self.usage,
-            'prog': '%s %s' % (get_prog(), name),
-            'formatter': UpdatingDefaultsHelpFormatter(),
-            'add_help_option': False,
-            'name': name,
-            'description': self.__doc__,
-            'isolated': isolated,
-        }
-
-        self.name = name
-        self.summary = summary
-        self.parser = ConfigOptionParser(**parser_kw)
-
-        # Commands should add options to this option group
-        optgroup_name = '%s Options' % self.name.capitalize()
-        self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
-
-        # Add the general options
-        gen_opts = cmdoptions.make_option_group(
-            cmdoptions.general_group,
-            self.parser,
-        )
-        self.parser.add_option_group(gen_opts)
-
-    def handle_pip_version_check(self, options):
-        # type: (Values) -> None
-        """
-        This is a no-op so that commands by default do not do the pip version
-        check.
-        """
-        # Make sure we do the pip version check if the index_group options
-        # are present.
-        assert not hasattr(options, 'no_index')
-
-    def run(self, options, args):
-        # type: (Values, List[Any]) -> Any
-        raise NotImplementedError
-
-    def parse_args(self, args):
-        # type: (List[str]) -> Tuple[Any, Any]
-        # factored out for testability
-        return self.parser.parse_args(args)
-
-    def main(self, args):
-        # type: (List[str]) -> int
-        try:
-            with self.main_context():
-                return self._main(args)
-        finally:
-            logging.shutdown()
-
-    def _main(self, args):
-        # type: (List[str]) -> int
-        # Intentionally set as early as possible so globally-managed temporary
-        # directories are available to the rest of the code.
-        self.enter_context(global_tempdir_manager())
-
-        options, args = self.parse_args(args)
-
-        # Set verbosity so that it can be used elsewhere.
-        self.verbosity = options.verbose - options.quiet
-
-        level_number = setup_logging(
-            verbosity=self.verbosity,
-            no_color=options.no_color,
-            user_log_file=options.log,
-        )
-
-        if (
-            sys.version_info[:2] == (2, 7) and
-            not options.no_python_version_warning
-        ):
-            message = (
-                "A future version of pip will drop support for Python 2.7. "
-                "More details about Python 2 support in pip, can be found at "
-                "https://pip.pypa.io/en/latest/development/release-process/#python-2-support"  # noqa
-            )
-            if platform.python_implementation() == "CPython":
-                message = (
-                    "Python 2.7 reached the end of its life on January "
-                    "1st, 2020. Please upgrade your Python as Python 2.7 "
-                    "is no longer maintained. "
-                ) + message
-            deprecated(message, replacement=None, gone_in=None)
-
-        if options.skip_requirements_regex:
-            deprecated(
-                "--skip-requirements-regex is unsupported and will be removed",
-                replacement=(
-                    "manage requirements/constraints files explicitly, "
-                    "possibly generating them from metadata"
-                ),
-                gone_in="20.1",
-                issue=7297,
-            )
-
-        # TODO: Try to get these passing down from the command?
-        #       without resorting to os.environ to hold these.
-        #       This also affects isolated builds and it should.
-
-        if options.no_input:
-            os.environ['PIP_NO_INPUT'] = '1'
-
-        if options.exists_action:
-            os.environ['PIP_EXISTS_ACTION'] = ' '.join(options.exists_action)
-
-        if options.require_venv and not self.ignore_require_venv:
-            # If a venv is required check if it can really be found
-            if not running_under_virtualenv():
-                logger.critical(
-                    'Could not find an activated virtualenv (required).'
-                )
-                sys.exit(VIRTUALENV_NOT_FOUND)
-
-        if options.cache_dir:
-            options.cache_dir = normalize_path(options.cache_dir)
-            if not check_path_owner(options.cache_dir):
-                logger.warning(
-                    "The directory '%s' or its parent directory is not owned "
-                    "or is not writable by the current user. The cache "
-                    "has been disabled. Check the permissions and owner of "
-                    "that directory. If executing pip with sudo, you may want "
-                    "sudo's -H flag.",
-                    options.cache_dir,
-                )
-                options.cache_dir = None
-
-        try:
-            status = self.run(options, args)
-            # FIXME: all commands should return an exit status
-            # and when it is done, isinstance is not needed anymore
-            if isinstance(status, int):
-                return status
-        except PreviousBuildDirError as exc:
-            logger.critical(str(exc))
-            logger.debug('Exception information:', exc_info=True)
-
-            return PREVIOUS_BUILD_DIR_ERROR
-        except (InstallationError, UninstallationError, BadCommand) as exc:
-            logger.critical(str(exc))
-            logger.debug('Exception information:', exc_info=True)
-
-            return ERROR
-        except CommandError as exc:
-            logger.critical('%s', exc)
-            logger.debug('Exception information:', exc_info=True)
-
-            return ERROR
-        except BrokenStdoutLoggingError:
-            # Bypass our logger and write any remaining messages to stderr
-            # because stdout no longer works.
-            print('ERROR: Pipe to stdout was broken', file=sys.stderr)
-            if level_number <= logging.DEBUG:
-                traceback.print_exc(file=sys.stderr)
-
-            return ERROR
-        except KeyboardInterrupt:
-            logger.critical('Operation cancelled by user')
-            logger.debug('Exception information:', exc_info=True)
-
-            return ERROR
-        except BaseException:
-            logger.critical('Exception:', exc_info=True)
-
-            return UNKNOWN_ERROR
-        finally:
-            self.handle_pip_version_check(options)
-
-        return SUCCESS