--- a/lib/python3.8/site-packages/pip/_internal/vcs/mercurial.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,155 +0,0 @@
-# The following comment should be removed at some point in the future.
-# mypy: disallow-untyped-defs=False
-
-from __future__ import absolute_import
-
-import logging
-import os
-
-from pip._vendor.six.moves import configparser
-
-from pip._internal.exceptions import BadCommand, InstallationError
-from pip._internal.utils.misc import display_path
-from pip._internal.utils.subprocess import make_command
-from pip._internal.utils.temp_dir import TempDirectory
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-from pip._internal.utils.urls import path_to_url
-from pip._internal.vcs.versioncontrol import (
-    VersionControl,
-    find_path_to_setup_from_repo_root,
-    vcs,
-)
-
-if MYPY_CHECK_RUNNING:
-    from pip._internal.utils.misc import HiddenText
-    from pip._internal.vcs.versioncontrol import RevOptions
-
-
-logger = logging.getLogger(__name__)
-
-
-class Mercurial(VersionControl):
-    name = 'hg'
-    dirname = '.hg'
-    repo_name = 'clone'
-    schemes = (
-        'hg', 'hg+file', 'hg+http', 'hg+https', 'hg+ssh', 'hg+static-http',
-    )
-
-    @staticmethod
-    def get_base_rev_args(rev):
-        return [rev]
-
-    def export(self, location, url):
-        # type: (str, HiddenText) -> None
-        """Export the Hg repository at the url to the destination location"""
-        with TempDirectory(kind="export") as temp_dir:
-            self.unpack(temp_dir.path, url=url)
-
-            self.run_command(
-                ['archive', location], show_stdout=False, cwd=temp_dir.path
-            )
-
-    def fetch_new(self, dest, url, rev_options):
-        # type: (str, HiddenText, RevOptions) -> None
-        rev_display = rev_options.to_display()
-        logger.info(
-            'Cloning hg %s%s to %s',
-            url,
-            rev_display,
-            display_path(dest),
-        )
-        self.run_command(make_command('clone', '--noupdate', '-q', url, dest))
-        self.run_command(
-            make_command('update', '-q', rev_options.to_args()),
-            cwd=dest,
-        )
-
-    def switch(self, dest, url, rev_options):
-        # type: (str, HiddenText, RevOptions) -> None
-        repo_config = os.path.join(dest, self.dirname, 'hgrc')
-        config = configparser.RawConfigParser()
-        try:
-            config.read(repo_config)
-            config.set('paths', 'default', url.secret)
-            with open(repo_config, 'w') as config_file:
-                config.write(config_file)
-        except (OSError, configparser.NoSectionError) as exc:
-            logger.warning(
-                'Could not switch Mercurial repository to %s: %s', url, exc,
-            )
-        else:
-            cmd_args = make_command('update', '-q', rev_options.to_args())
-            self.run_command(cmd_args, cwd=dest)
-
-    def update(self, dest, url, rev_options):
-        # type: (str, HiddenText, RevOptions) -> None
-        self.run_command(['pull', '-q'], cwd=dest)
-        cmd_args = make_command('update', '-q', rev_options.to_args())
-        self.run_command(cmd_args, cwd=dest)
-
-    @classmethod
-    def get_remote_url(cls, location):
-        url = cls.run_command(
-            ['showconfig', 'paths.default'],
-            show_stdout=False, cwd=location).strip()
-        if cls._is_local_repository(url):
-            url = path_to_url(url)
-        return url.strip()
-
-    @classmethod
-    def get_revision(cls, location):
-        """
-        Return the repository-local changeset revision number, as an integer.
-        """
-        current_revision = cls.run_command(
-            ['parents', '--template={rev}'],
-            show_stdout=False, cwd=location).strip()
-        return current_revision
-
-    @classmethod
-    def get_requirement_revision(cls, location):
-        """
-        Return the changeset identification hash, as a 40-character
-        hexadecimal string
-        """
-        current_rev_hash = cls.run_command(
-            ['parents', '--template={node}'],
-            show_stdout=False, cwd=location).strip()
-        return current_rev_hash
-
-    @classmethod
-    def is_commit_id_equal(cls, dest, name):
-        """Always assume the versions don't match"""
-        return False
-
-    @classmethod
-    def get_subdirectory(cls, location):
-        """
-        Return the path to setup.py, relative to the repo root.
-        Return None if setup.py is in the repo root.
-        """
-        # find the repo root
-        repo_root = cls.run_command(
-            ['root'], show_stdout=False, cwd=location).strip()
-        if not os.path.isabs(repo_root):
-            repo_root = os.path.abspath(os.path.join(location, repo_root))
-        return find_path_to_setup_from_repo_root(location, repo_root)
-
-    @classmethod
-    def controls_location(cls, location):
-        if super(Mercurial, cls).controls_location(location):
-            return True
-        try:
-            cls.run_command(
-                ['identify'],
-                cwd=location,
-                show_stdout=False,
-                on_returncode='raise',
-                log_failed_cmd=False)
-            return True
-        except (BadCommand, InstallationError):
-            return False
-
-
-vcs.register(Mercurial)