--- a/lib/python3.8/site-packages/pip/_vendor/pep517/check.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,203 +0,0 @@
-"""Check a project and backend by attempting to build using PEP 517 hooks.
-"""
-import argparse
-import logging
-import os
-from os.path import isfile, join as pjoin
-from toml import TomlDecodeError, load as toml_load
-import shutil
-from subprocess import CalledProcessError
-import sys
-import tarfile
-from tempfile import mkdtemp
-import zipfile
-
-from .colorlog import enable_colourful_output
-from .envbuild import BuildEnvironment
-from .wrappers import Pep517HookCaller
-
-log = logging.getLogger(__name__)
-
-
-def check_build_sdist(hooks, build_sys_requires):
-    with BuildEnvironment() as env:
-        try:
-            env.pip_install(build_sys_requires)
-            log.info('Installed static build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install static build dependencies')
-            return False
-
-        try:
-            reqs = hooks.get_requires_for_build_sdist({})
-            log.info('Got build requires: %s', reqs)
-        except Exception:
-            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
-            return False
-
-        try:
-            env.pip_install(reqs)
-            log.info('Installed dynamic build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install dynamic build dependencies')
-            return False
-
-        td = mkdtemp()
-        log.info('Trying to build sdist in %s', td)
-        try:
-            try:
-                filename = hooks.build_sdist(td, {})
-                log.info('build_sdist returned %r', filename)
-            except Exception:
-                log.info('Failure in build_sdist', exc_info=True)
-                return False
-
-            if not filename.endswith('.tar.gz'):
-                log.error(
-                    "Filename %s doesn't have .tar.gz extension", filename)
-                return False
-
-            path = pjoin(td, filename)
-            if isfile(path):
-                log.info("Output file %s exists", path)
-            else:
-                log.error("Output file %s does not exist", path)
-                return False
-
-            if tarfile.is_tarfile(path):
-                log.info("Output file is a tar file")
-            else:
-                log.error("Output file is not a tar file")
-                return False
-
-        finally:
-            shutil.rmtree(td)
-
-        return True
-
-
-def check_build_wheel(hooks, build_sys_requires):
-    with BuildEnvironment() as env:
-        try:
-            env.pip_install(build_sys_requires)
-            log.info('Installed static build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install static build dependencies')
-            return False
-
-        try:
-            reqs = hooks.get_requires_for_build_wheel({})
-            log.info('Got build requires: %s', reqs)
-        except Exception:
-            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
-            return False
-
-        try:
-            env.pip_install(reqs)
-            log.info('Installed dynamic build dependencies')
-        except CalledProcessError:
-            log.error('Failed to install dynamic build dependencies')
-            return False
-
-        td = mkdtemp()
-        log.info('Trying to build wheel in %s', td)
-        try:
-            try:
-                filename = hooks.build_wheel(td, {})
-                log.info('build_wheel returned %r', filename)
-            except Exception:
-                log.info('Failure in build_wheel', exc_info=True)
-                return False
-
-            if not filename.endswith('.whl'):
-                log.error("Filename %s doesn't have .whl extension", filename)
-                return False
-
-            path = pjoin(td, filename)
-            if isfile(path):
-                log.info("Output file %s exists", path)
-            else:
-                log.error("Output file %s does not exist", path)
-                return False
-
-            if zipfile.is_zipfile(path):
-                log.info("Output file is a zip file")
-            else:
-                log.error("Output file is not a zip file")
-                return False
-
-        finally:
-            shutil.rmtree(td)
-
-        return True
-
-
-def check(source_dir):
-    pyproject = pjoin(source_dir, 'pyproject.toml')
-    if isfile(pyproject):
-        log.info('Found pyproject.toml')
-    else:
-        log.error('Missing pyproject.toml')
-        return False
-
-    try:
-        with open(pyproject) as f:
-            pyproject_data = toml_load(f)
-        # Ensure the mandatory data can be loaded
-        buildsys = pyproject_data['build-system']
-        requires = buildsys['requires']
-        backend = buildsys['build-backend']
-        backend_path = buildsys.get('backend-path')
-        log.info('Loaded pyproject.toml')
-    except (TomlDecodeError, KeyError):
-        log.error("Invalid pyproject.toml", exc_info=True)
-        return False
-
-    hooks = Pep517HookCaller(source_dir, backend, backend_path)
-
-    sdist_ok = check_build_sdist(hooks, requires)
-    wheel_ok = check_build_wheel(hooks, requires)
-
-    if not sdist_ok:
-        log.warning('Sdist checks failed; scroll up to see')
-    if not wheel_ok:
-        log.warning('Wheel checks failed')
-
-    return sdist_ok
-
-
-def main(argv=None):
-    ap = argparse.ArgumentParser()
-    ap.add_argument(
-        'source_dir',
-        help="A directory containing pyproject.toml")
-    args = ap.parse_args(argv)
-
-    enable_colourful_output()
-
-    ok = check(args.source_dir)
-
-    if ok:
-        print(ansi('Checks passed', 'green'))
-    else:
-        print(ansi('Checks failed', 'red'))
-        sys.exit(1)
-
-
-ansi_codes = {
-    'reset': '\x1b[0m',
-    'bold': '\x1b[1m',
-    'red': '\x1b[31m',
-    'green': '\x1b[32m',
-}
-
-
-def ansi(s, attr):
-    if os.name != 'nt' and sys.stdout.isatty():
-        return ansi_codes[attr] + str(s) + ansi_codes['reset']
-    else:
-        return str(s)
-
-
-if __name__ == '__main__':
-    main()