--- a/lib/python3.8/site-packages/pip/_vendor/distlib/scripts.py	Mon Jul 27 03:47:31 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,416 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# Copyright (C) 2013-2015 Vinay Sajip.
-# Licensed to the Python Software Foundation under a contributor agreement.
-# See LICENSE.txt and CONTRIBUTORS.txt.
-#
-from io import BytesIO
-import logging
-import os
-import re
-import struct
-import sys
-
-from .compat import sysconfig, detect_encoding, ZipFile
-from .resources import finder
-from .util import (FileOperator, get_export_entry, convert_path,
-                   get_executable, in_venv)
-
-logger = logging.getLogger(__name__)
-
-_DEFAULT_MANIFEST = '''
-<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
- <assemblyIdentity version="1.0.0.0"
- processorArchitecture="X86"
- name="%s"
- type="win32"/>
-
- <!-- Identify the application security requirements. -->
- <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
- <security>
- <requestedPrivileges>
- <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
- </requestedPrivileges>
- </security>
- </trustInfo>
-</assembly>'''.strip()
-
-# check if Python is called on the first line with this expression
-FIRST_LINE_RE = re.compile(b'^#!.*pythonw?[0-9.]*([ \t].*)?$')
-SCRIPT_TEMPLATE = r'''# -*- coding: utf-8 -*-
-import re
-import sys
-from %(module)s import %(import_name)s
-if __name__ == '__main__':
-    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
-    sys.exit(%(func)s())
-'''
-
-
-def _enquote_executable(executable):
-    if ' ' in executable:
-        # make sure we quote only the executable in case of env
-        # for example /usr/bin/env "/dir with spaces/bin/jython"
-        # instead of "/usr/bin/env /dir with spaces/bin/jython"
-        # otherwise whole
-        if executable.startswith('/usr/bin/env '):
-            env, _executable = executable.split(' ', 1)
-            if ' ' in _executable and not _executable.startswith('"'):
-                executable = '%s "%s"' % (env, _executable)
-        else:
-            if not executable.startswith('"'):
-                executable = '"%s"' % executable
-    return executable
-
-
-class ScriptMaker(object):
-    """
-    A class to copy or create scripts from source scripts or callable
-    specifications.
-    """
-    script_template = SCRIPT_TEMPLATE
-
-    executable = None  # for shebangs
-
-    def __init__(self, source_dir, target_dir, add_launchers=True,
-                 dry_run=False, fileop=None):
-        self.source_dir = source_dir
-        self.target_dir = target_dir
-        self.add_launchers = add_launchers
-        self.force = False
-        self.clobber = False
-        # It only makes sense to set mode bits on POSIX.
-        self.set_mode = (os.name == 'posix') or (os.name == 'java' and
-                                                 os._name == 'posix')
-        self.variants = set(('', 'X.Y'))
-        self._fileop = fileop or FileOperator(dry_run)
-
-        self._is_nt = os.name == 'nt' or (
-            os.name == 'java' and os._name == 'nt')
-
-    def _get_alternate_executable(self, executable, options):
-        if options.get('gui', False) and self._is_nt:  # pragma: no cover
-            dn, fn = os.path.split(executable)
-            fn = fn.replace('python', 'pythonw')
-            executable = os.path.join(dn, fn)
-        return executable
-
-    if sys.platform.startswith('java'):  # pragma: no cover
-        def _is_shell(self, executable):
-            """
-            Determine if the specified executable is a script
-            (contains a #! line)
-            """
-            try:
-                with open(executable) as fp:
-                    return fp.read(2) == '#!'
-            except (OSError, IOError):
-                logger.warning('Failed to open %s', executable)
-                return False
-
-        def _fix_jython_executable(self, executable):
-            if self._is_shell(executable):
-                # Workaround for Jython is not needed on Linux systems.
-                import java
-
-                if java.lang.System.getProperty('os.name') == 'Linux':
-                    return executable
-            elif executable.lower().endswith('jython.exe'):
-                # Use wrapper exe for Jython on Windows
-                return executable
-            return '/usr/bin/env %s' % executable
-
-    def _build_shebang(self, executable, post_interp):
-        """
-        Build a shebang line. In the simple case (on Windows, or a shebang line
-        which is not too long or contains spaces) use a simple formulation for
-        the shebang. Otherwise, use /bin/sh as the executable, with a contrived
-        shebang which allows the script to run either under Python or sh, using
-        suitable quoting. Thanks to Harald Nordgren for his input.
-
-        See also: http://www.in-ulm.de/~mascheck/various/shebang/#length
-                  https://hg.mozilla.org/mozilla-central/file/tip/mach
-        """
-        if os.name != 'posix':
-            simple_shebang = True
-        else:
-            # Add 3 for '#!' prefix and newline suffix.
-            shebang_length = len(executable) + len(post_interp) + 3
-            if sys.platform == 'darwin':
-                max_shebang_length = 512
-            else:
-                max_shebang_length = 127
-            simple_shebang = ((b' ' not in executable) and
-                              (shebang_length <= max_shebang_length))
-
-        if simple_shebang:
-            result = b'#!' + executable + post_interp + b'\n'
-        else:
-            result = b'#!/bin/sh\n'
-            result += b"'''exec' " + executable + post_interp + b' "$0" "$@"\n'
-            result += b"' '''"
-        return result
-
-    def _get_shebang(self, encoding, post_interp=b'', options=None):
-        enquote = True
-        if self.executable:
-            executable = self.executable
-            enquote = False     # assume this will be taken care of
-        elif not sysconfig.is_python_build():
-            executable = get_executable()
-        elif in_venv():  # pragma: no cover
-            executable = os.path.join(sysconfig.get_path('scripts'),
-                            'python%s' % sysconfig.get_config_var('EXE'))
-        else:  # pragma: no cover
-            executable = os.path.join(
-                sysconfig.get_config_var('BINDIR'),
-               'python%s%s' % (sysconfig.get_config_var('VERSION'),
-                               sysconfig.get_config_var('EXE')))
-        if options:
-            executable = self._get_alternate_executable(executable, options)
-
-        if sys.platform.startswith('java'):  # pragma: no cover
-            executable = self._fix_jython_executable(executable)
-
-        # Normalise case for Windows - COMMENTED OUT
-        # executable = os.path.normcase(executable)
-        # N.B. The normalising operation above has been commented out: See
-        # issue #124. Although paths in Windows are generally case-insensitive,
-        # they aren't always. For example, a path containing a ẞ (which is a
-        # LATIN CAPITAL LETTER SHARP S - U+1E9E) is normcased to ß (which is a
-        # LATIN SMALL LETTER SHARP S' - U+00DF). The two are not considered by
-        # Windows as equivalent in path names.
-
-        # If the user didn't specify an executable, it may be necessary to
-        # cater for executable paths with spaces (not uncommon on Windows)
-        if enquote:
-            executable = _enquote_executable(executable)
-        # Issue #51: don't use fsencode, since we later try to
-        # check that the shebang is decodable using utf-8.
-        executable = executable.encode('utf-8')
-        # in case of IronPython, play safe and enable frames support
-        if (sys.platform == 'cli' and '-X:Frames' not in post_interp
-            and '-X:FullFrames' not in post_interp):  # pragma: no cover
-            post_interp += b' -X:Frames'
-        shebang = self._build_shebang(executable, post_interp)
-        # Python parser starts to read a script using UTF-8 until
-        # it gets a #coding:xxx cookie. The shebang has to be the
-        # first line of a file, the #coding:xxx cookie cannot be
-        # written before. So the shebang has to be decodable from
-        # UTF-8.
-        try:
-            shebang.decode('utf-8')
-        except UnicodeDecodeError:  # pragma: no cover
-            raise ValueError(
-                'The shebang (%r) is not decodable from utf-8' % shebang)
-        # If the script is encoded to a custom encoding (use a
-        # #coding:xxx cookie), the shebang has to be decodable from
-        # the script encoding too.
-        if encoding != 'utf-8':
-            try:
-                shebang.decode(encoding)
-            except UnicodeDecodeError:  # pragma: no cover
-                raise ValueError(
-                    'The shebang (%r) is not decodable '
-                    'from the script encoding (%r)' % (shebang, encoding))
-        return shebang
-
-    def _get_script_text(self, entry):
-        return self.script_template % dict(module=entry.prefix,
-                                           import_name=entry.suffix.split('.')[0],
-                                           func=entry.suffix)
-
-    manifest = _DEFAULT_MANIFEST
-
-    def get_manifest(self, exename):
-        base = os.path.basename(exename)
-        return self.manifest % base
-
-    def _write_script(self, names, shebang, script_bytes, filenames, ext):
-        use_launcher = self.add_launchers and self._is_nt
-        linesep = os.linesep.encode('utf-8')
-        if not shebang.endswith(linesep):
-            shebang += linesep
-        if not use_launcher:
-            script_bytes = shebang + script_bytes
-        else:  # pragma: no cover
-            if ext == 'py':
-                launcher = self._get_launcher('t')
-            else:
-                launcher = self._get_launcher('w')
-            stream = BytesIO()
-            with ZipFile(stream, 'w') as zf:
-                zf.writestr('__main__.py', script_bytes)
-            zip_data = stream.getvalue()
-            script_bytes = launcher + shebang + zip_data
-        for name in names:
-            outname = os.path.join(self.target_dir, name)
-            if use_launcher:  # pragma: no cover
-                n, e = os.path.splitext(outname)
-                if e.startswith('.py'):
-                    outname = n
-                outname = '%s.exe' % outname
-                try:
-                    self._fileop.write_binary_file(outname, script_bytes)
-                except Exception:
-                    # Failed writing an executable - it might be in use.
-                    logger.warning('Failed to write executable - trying to '
-                                   'use .deleteme logic')
-                    dfname = '%s.deleteme' % outname
-                    if os.path.exists(dfname):
-                        os.remove(dfname)       # Not allowed to fail here
-                    os.rename(outname, dfname)  # nor here
-                    self._fileop.write_binary_file(outname, script_bytes)
-                    logger.debug('Able to replace executable using '
-                                 '.deleteme logic')
-                    try:
-                        os.remove(dfname)
-                    except Exception:
-                        pass    # still in use - ignore error
-            else:
-                if self._is_nt and not outname.endswith('.' + ext):  # pragma: no cover
-                    outname = '%s.%s' % (outname, ext)
-                if os.path.exists(outname) and not self.clobber:
-                    logger.warning('Skipping existing file %s', outname)
-                    continue
-                self._fileop.write_binary_file(outname, script_bytes)
-                if self.set_mode:
-                    self._fileop.set_executable_mode([outname])
-            filenames.append(outname)
-
-    def _make_script(self, entry, filenames, options=None):
-        post_interp = b''
-        if options:
-            args = options.get('interpreter_args', [])
-            if args:
-                args = ' %s' % ' '.join(args)
-                post_interp = args.encode('utf-8')
-        shebang = self._get_shebang('utf-8', post_interp, options=options)
-        script = self._get_script_text(entry).encode('utf-8')
-        name = entry.name
-        scriptnames = set()
-        if '' in self.variants:
-            scriptnames.add(name)
-        if 'X' in self.variants:
-            scriptnames.add('%s%s' % (name, sys.version_info[0]))
-        if 'X.Y' in self.variants:
-            scriptnames.add('%s-%s.%s' % (name, sys.version_info[0],
-                            sys.version_info[1]))
-        if options and options.get('gui', False):
-            ext = 'pyw'
-        else:
-            ext = 'py'
-        self._write_script(scriptnames, shebang, script, filenames, ext)
-
-    def _copy_script(self, script, filenames):
-        adjust = False
-        script = os.path.join(self.source_dir, convert_path(script))
-        outname = os.path.join(self.target_dir, os.path.basename(script))
-        if not self.force and not self._fileop.newer(script, outname):
-            logger.debug('not copying %s (up-to-date)', script)
-            return
-
-        # Always open the file, but ignore failures in dry-run mode --
-        # that way, we'll get accurate feedback if we can read the
-        # script.
-        try:
-            f = open(script, 'rb')
-        except IOError:  # pragma: no cover
-            if not self.dry_run:
-                raise
-            f = None
-        else:
-            first_line = f.readline()
-            if not first_line:  # pragma: no cover
-                logger.warning('%s: %s is an empty file (skipping)',
-                               self.get_command_name(),  script)
-                return
-
-            match = FIRST_LINE_RE.match(first_line.replace(b'\r\n', b'\n'))
-            if match:
-                adjust = True
-                post_interp = match.group(1) or b''
-
-        if not adjust:
-            if f:
-                f.close()
-            self._fileop.copy_file(script, outname)
-            if self.set_mode:
-                self._fileop.set_executable_mode([outname])
-            filenames.append(outname)
-        else:
-            logger.info('copying and adjusting %s -> %s', script,
-                        self.target_dir)
-            if not self._fileop.dry_run:
-                encoding, lines = detect_encoding(f.readline)
-                f.seek(0)
-                shebang = self._get_shebang(encoding, post_interp)
-                if b'pythonw' in first_line:  # pragma: no cover
-                    ext = 'pyw'
-                else:
-                    ext = 'py'
-                n = os.path.basename(outname)
-                self._write_script([n], shebang, f.read(), filenames, ext)
-            if f:
-                f.close()
-
-    @property
-    def dry_run(self):
-        return self._fileop.dry_run
-
-    @dry_run.setter
-    def dry_run(self, value):
-        self._fileop.dry_run = value
-
-    if os.name == 'nt' or (os.name == 'java' and os._name == 'nt'):  # pragma: no cover
-        # Executable launcher support.
-        # Launchers are from https://bitbucket.org/vinay.sajip/simple_launcher/
-
-        def _get_launcher(self, kind):
-            if struct.calcsize('P') == 8:   # 64-bit
-                bits = '64'
-            else:
-                bits = '32'
-            name = '%s%s.exe' % (kind, bits)
-            # Issue 31: don't hardcode an absolute package name, but
-            # determine it relative to the current package
-            distlib_package = __name__.rsplit('.', 1)[0]
-            resource = finder(distlib_package).find(name)
-            if not resource:
-                msg = ('Unable to find resource %s in package %s' % (name,
-                       distlib_package))
-                raise ValueError(msg)
-            return resource.bytes
-
-    # Public API follows
-
-    def make(self, specification, options=None):
-        """
-        Make a script.
-
-        :param specification: The specification, which is either a valid export
-                              entry specification (to make a script from a
-                              callable) or a filename (to make a script by
-                              copying from a source location).
-        :param options: A dictionary of options controlling script generation.
-        :return: A list of all absolute pathnames written to.
-        """
-        filenames = []
-        entry = get_export_entry(specification)
-        if entry is None:
-            self._copy_script(specification, filenames)
-        else:
-            self._make_script(entry, filenames, options=options)
-        return filenames
-
-    def make_multiple(self, specifications, options=None):
-        """
-        Take a list of specifications and make scripts from them,
-        :param specifications: A list of specifications.
-        :return: A list of all absolute pathnames written to,
-        """
-        filenames = []
-        for specification in specifications:
-            filenames.extend(self.make(specification, options))
-        return filenames