--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/python3.8/site-packages/pip/_internal/operations/install/legacy.py	Mon Jul 27 03:47:31 2020 -0400
@@ -0,0 +1,129 @@
+"""Legacy installation process, i.e. `setup.py install`.
+"""
+
+import logging
+import os
+from distutils.util import change_root
+
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import ensure_dir
+from pip._internal.utils.setuptools_build import make_setuptools_install_args
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Optional, Sequence
+
+    from pip._internal.models.scheme import Scheme
+    from pip._internal.req.req_install import InstallRequirement
+
+
+logger = logging.getLogger(__name__)
+
+
+def install(
+    install_req,  # type: InstallRequirement
+    install_options,  # type: List[str]
+    global_options,  # type: Sequence[str]
+    root,  # type: Optional[str]
+    home,  # type: Optional[str]
+    prefix,  # type: Optional[str]
+    use_user_site,  # type: bool
+    pycompile,  # type: bool
+    scheme,  # type: Scheme
+):
+    # type: (...) -> None
+    # Extend the list of global and install options passed on to
+    # the setup.py call with the ones from the requirements file.
+    # Options specified in requirements file override those
+    # specified on the command line, since the last option given
+    # to setup.py is the one that is used.
+    global_options = list(global_options) + \
+        install_req.options.get('global_options', [])
+    install_options = list(install_options) + \
+        install_req.options.get('install_options', [])
+
+    header_dir = scheme.headers
+
+    with TempDirectory(kind="record") as temp_dir:
+        record_filename = os.path.join(temp_dir.path, 'install-record.txt')
+        install_args = make_setuptools_install_args(
+            install_req.setup_py_path,
+            global_options=global_options,
+            install_options=install_options,
+            record_filename=record_filename,
+            root=root,
+            prefix=prefix,
+            header_dir=header_dir,
+            home=home,
+            use_user_site=use_user_site,
+            no_user_config=install_req.isolated,
+            pycompile=pycompile,
+        )
+
+        runner = runner_with_spinner_message(
+            "Running setup.py install for {}".format(install_req.name)
+        )
+        with indent_log(), install_req.build_env:
+            runner(
+                cmd=install_args,
+                cwd=install_req.unpacked_source_directory,
+            )
+
+        if not os.path.exists(record_filename):
+            logger.debug('Record file %s not found', record_filename)
+            return
+        install_req.install_succeeded = True
+
+        # We intentionally do not use any encoding to read the file because
+        # setuptools writes the file using distutils.file_util.write_file,
+        # which does not specify an encoding.
+        with open(record_filename) as f:
+            record_lines = f.read().splitlines()
+
+    def prepend_root(path):
+        # type: (str) -> str
+        if root is None or not os.path.isabs(path):
+            return path
+        else:
+            return change_root(root, path)
+
+    for line in record_lines:
+        directory = os.path.dirname(line)
+        if directory.endswith('.egg-info'):
+            egg_info_dir = prepend_root(directory)
+            break
+    else:
+        deprecated(
+            reason=(
+                "{} did not indicate that it installed an "
+                ".egg-info directory. Only setup.py projects "
+                "generating .egg-info directories are supported."
+            ).format(install_req),
+            replacement=(
+                "for maintainers: updating the setup.py of {0}. "
+                "For users: contact the maintainers of {0} to let "
+                "them know to update their setup.py.".format(
+                    install_req.name
+                )
+            ),
+            gone_in="20.2",
+            issue=6998,
+        )
+        # FIXME: put the record somewhere
+        return
+    new_lines = []
+    for line in record_lines:
+        filename = line.strip()
+        if os.path.isdir(filename):
+            filename += os.path.sep
+        new_lines.append(
+            os.path.relpath(prepend_root(filename), egg_info_dir)
+        )
+    new_lines.sort()
+    ensure_dir(egg_info_dir)
+    inst_files_path = os.path.join(egg_info_dir, 'installed-files.txt')
+    with open(inst_files_path, 'w') as f:
+        f.write('\n'.join(new_lines) + '\n')