--- a/lib/python3.8/site-packages/pip/_internal/operations/freeze.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,265 +0,0 @@
-# The following comment should be removed at some point in the future.
-# mypy: strict-optional=False
-# mypy: disallow-untyped-defs=False
-
-from __future__ import absolute_import
-
-import collections
-import logging
-import os
-import re
-
-from pip._vendor import six
-from pip._vendor.packaging.utils import canonicalize_name
-from pip._vendor.pkg_resources import RequirementParseError
-
-from pip._internal.exceptions import BadCommand, InstallationError
-from pip._internal.req.constructors import (
-    install_req_from_editable,
-    install_req_from_line,
-)
-from pip._internal.req.req_file import COMMENT_RE
-from pip._internal.utils.misc import (
-    dist_is_editable,
-    get_installed_distributions,
-)
-from pip._internal.utils.typing import MYPY_CHECK_RUNNING
-
-if MYPY_CHECK_RUNNING:
-    from typing import (
-        Iterator, Optional, List, Container, Set, Dict, Tuple, Iterable, Union
-    )
-    from pip._internal.cache import WheelCache
-    from pip._vendor.pkg_resources import (
-        Distribution, Requirement
-    )
-
-    RequirementInfo = Tuple[Optional[Union[str, Requirement]], bool, List[str]]
-
-
-logger = logging.getLogger(__name__)
-
-
-def freeze(
-    requirement=None,  # type: Optional[List[str]]
-    find_links=None,  # type: Optional[List[str]]
-    local_only=None,  # type: Optional[bool]
-    user_only=None,  # type: Optional[bool]
-    paths=None,  # type: Optional[List[str]]
-    skip_regex=None,  # type: Optional[str]
-    isolated=False,  # type: bool
-    wheel_cache=None,  # type: Optional[WheelCache]
-    exclude_editable=False,  # type: bool
-    skip=()  # type: Container[str]
-):
-    # type: (...) -> Iterator[str]
-    find_links = find_links or []
-    skip_match = None
-
-    if skip_regex:
-        skip_match = re.compile(skip_regex).search
-
-    for link in find_links:
-        yield '-f %s' % link
-    installations = {}  # type: Dict[str, FrozenRequirement]
-    for dist in get_installed_distributions(local_only=local_only,
-                                            skip=(),
-                                            user_only=user_only,
-                                            paths=paths):
-        try:
-            req = FrozenRequirement.from_dist(dist)
-        except RequirementParseError as exc:
-            # We include dist rather than dist.project_name because the
-            # dist string includes more information, like the version and
-            # location. We also include the exception message to aid
-            # troubleshooting.
-            logger.warning(
-                'Could not generate requirement for distribution %r: %s',
-                dist, exc
-            )
-            continue
-        if exclude_editable and req.editable:
-            continue
-        installations[req.canonical_name] = req
-
-    if requirement:
-        # the options that don't get turned into an InstallRequirement
-        # should only be emitted once, even if the same option is in multiple
-        # requirements files, so we need to keep track of what has been emitted
-        # so that we don't emit it again if it's seen again
-        emitted_options = set()  # type: Set[str]
-        # keep track of which files a requirement is in so that we can
-        # give an accurate warning if a requirement appears multiple times.
-        req_files = collections.defaultdict(list)  # type: Dict[str, List[str]]
-        for req_file_path in requirement:
-            with open(req_file_path) as req_file:
-                for line in req_file:
-                    if (not line.strip() or
-                            line.strip().startswith('#') or
-                            (skip_match and skip_match(line)) or
-                            line.startswith((
-                                '-r', '--requirement',
-                                '-Z', '--always-unzip',
-                                '-f', '--find-links',
-                                '-i', '--index-url',
-                                '--pre',
-                                '--trusted-host',
-                                '--process-dependency-links',
-                                '--extra-index-url'))):
-                        line = line.rstrip()
-                        if line not in emitted_options:
-                            emitted_options.add(line)
-                            yield line
-                        continue
-
-                    if line.startswith('-e') or line.startswith('--editable'):
-                        if line.startswith('-e'):
-                            line = line[2:].strip()
-                        else:
-                            line = line[len('--editable'):].strip().lstrip('=')
-                        line_req = install_req_from_editable(
-                            line,
-                            isolated=isolated,
-                            wheel_cache=wheel_cache,
-                        )
-                    else:
-                        line_req = install_req_from_line(
-                            COMMENT_RE.sub('', line).strip(),
-                            isolated=isolated,
-                            wheel_cache=wheel_cache,
-                        )
-
-                    if not line_req.name:
-                        logger.info(
-                            "Skipping line in requirement file [%s] because "
-                            "it's not clear what it would install: %s",
-                            req_file_path, line.strip(),
-                        )
-                        logger.info(
-                            "  (add #egg=PackageName to the URL to avoid"
-                            " this warning)"
-                        )
-                    else:
-                        line_req_canonical_name = canonicalize_name(
-                            line_req.name)
-                        if line_req_canonical_name not in installations:
-                            # either it's not installed, or it is installed
-                            # but has been processed already
-                            if not req_files[line_req.name]:
-                                logger.warning(
-                                    "Requirement file [%s] contains %s, but "
-                                    "package %r is not installed",
-                                    req_file_path,
-                                    COMMENT_RE.sub('', line).strip(),
-                                    line_req.name
-                                )
-                            else:
-                                req_files[line_req.name].append(req_file_path)
-                        else:
-                            yield str(installations[
-                                line_req_canonical_name]).rstrip()
-                            del installations[line_req_canonical_name]
-                            req_files[line_req.name].append(req_file_path)
-
-        # Warn about requirements that were included multiple times (in a
-        # single requirements file or in different requirements files).
-        for name, files in six.iteritems(req_files):
-            if len(files) > 1:
-                logger.warning("Requirement %s included multiple times [%s]",
-                               name, ', '.join(sorted(set(files))))
-
-        yield(
-            '## The following requirements were added by '
-            'pip freeze:'
-        )
-    for installation in sorted(
-            installations.values(), key=lambda x: x.name.lower()):
-        if installation.canonical_name not in skip:
-            yield str(installation).rstrip()
-
-
-def get_requirement_info(dist):
-    # type: (Distribution) -> RequirementInfo
-    """
-    Compute and return values (req, editable, comments) for use in
-    FrozenRequirement.from_dist().
-    """
-    if not dist_is_editable(dist):
-        return (None, False, [])
-
-    location = os.path.normcase(os.path.abspath(dist.location))
-
-    from pip._internal.vcs import vcs, RemoteNotFoundError
-    vcs_backend = vcs.get_backend_for_dir(location)
-
-    if vcs_backend is None:
-        req = dist.as_requirement()
-        logger.debug(
-            'No VCS found for editable requirement "%s" in: %r', req,
-            location,
-        )
-        comments = [
-            '# Editable install with no version control ({})'.format(req)
-        ]
-        return (location, True, comments)
-
-    try:
-        req = vcs_backend.get_src_requirement(location, dist.project_name)
-    except RemoteNotFoundError:
-        req = dist.as_requirement()
-        comments = [
-            '# Editable {} install with no remote ({})'.format(
-                type(vcs_backend).__name__, req,
-            )
-        ]
-        return (location, True, comments)
-
-    except BadCommand:
-        logger.warning(
-            'cannot determine version of editable source in %s '
-            '(%s command not found in path)',
-            location,
-            vcs_backend.name,
-        )
-        return (None, True, [])
-
-    except InstallationError as exc:
-        logger.warning(
-            "Error when trying to get requirement for VCS system %s, "
-            "falling back to uneditable format", exc
-        )
-    else:
-        if req is not None:
-            return (req, True, [])
-
-    logger.warning(
-        'Could not determine repository location of %s', location
-    )
-    comments = ['## !! Could not determine repository location']
-
-    return (None, False, comments)
-
-
-class FrozenRequirement(object):
-    def __init__(self, name, req, editable, comments=()):
-        # type: (str, Union[str, Requirement], bool, Iterable[str]) -> None
-        self.name = name
-        self.canonical_name = canonicalize_name(name)
-        self.req = req
-        self.editable = editable
-        self.comments = comments
-
-    @classmethod
-    def from_dist(cls, dist):
-        # type: (Distribution) -> FrozenRequirement
-        req, editable, comments = get_requirement_info(dist)
-        if req is None:
-            req = dist.as_requirement()
-
-        return cls(dist.project_name, req, editable, comments=comments)
-
-    def __str__(self):
-        req = self.req
-        if self.editable:
-            req = '-e %s' % req
-        return '\n'.join(list(self.comments) + [str(req)]) + '\n'