Add m-esr52 at 52.6.0

1 files changed, 2329 insertions, 0 deletions

diff --git a/python/virtualenv/virtualenv.py b/python/virtualenv/virtualenv.py
new file mode 100755
index 0000000000..e363021cc1
--- /dev/null
+++ b/python/virtualenv/virtualenv.py
@@ -0,0 +1,2329 @@
+#!/usr/bin/env python
+"""Create a "virtual" Python installation"""
+
+import os
+import sys
+
+# If we are running in a new interpreter to create a virtualenv,
+# we do NOT want paths from our existing location interfering with anything,
+# So we remove this file's directory from sys.path - most likely to be
+# the previous interpreter's site-packages. Solves #705, #763, #779
+if os.environ.get('VIRTUALENV_INTERPRETER_RUNNING'):
+    for path in sys.path[:]:
+        if os.path.realpath(os.path.dirname(__file__)) == os.path.realpath(path):
+            sys.path.remove(path)
+
+import base64
+import codecs
+import optparse
+import re
+import shutil
+import logging
+import zlib
+import errno
+import glob
+import distutils.sysconfig
+import struct
+import subprocess
+import pkgutil
+import tempfile
+import textwrap
+from distutils.util import strtobool
+from os.path import join
+
+try:
+    import ConfigParser
+except ImportError:
+    import configparser as ConfigParser
+
+__version__ = "15.0.1"
+virtualenv_version = __version__  # legacy
+
+if sys.version_info < (2, 6):
+    print('ERROR: %s' % sys.exc_info()[1])
+    print('ERROR: this script requires Python 2.6 or greater.')
+    sys.exit(101)
+
+try:
+    basestring
+except NameError:
+    basestring = str
+
+py_version = 'python%s.%s' % (sys.version_info[0], sys.version_info[1])
+
+is_jython = sys.platform.startswith('java')
+is_pypy = hasattr(sys, 'pypy_version_info')
+is_win = (sys.platform == 'win32' and os.sep == '\\')
+is_cygwin = (sys.platform == 'cygwin')
+is_msys2 = (sys.platform == 'win32' and os.sep == '/')
+is_darwin = (sys.platform == 'darwin')
+abiflags = getattr(sys, 'abiflags', '')
+
+user_dir = os.path.expanduser('~')
+if is_win:
+    default_storage_dir = os.path.join(user_dir, 'virtualenv')
+else:
+    default_storage_dir = os.path.join(user_dir, '.virtualenv')
+default_config_file = os.path.join(default_storage_dir, 'virtualenv.ini')
+
+if is_pypy:
+    expected_exe = 'pypy'
+elif is_jython:
+    expected_exe = 'jython'
+else:
+    expected_exe = 'python'
+
+# Return a mapping of version -> Python executable
+# Only provided for Windows, where the information in the registry is used
+if not is_win:
+    def get_installed_pythons():
+        return {}
+else:
+    try:
+        import winreg
+    except ImportError:
+        import _winreg as winreg
+
+    def get_installed_pythons():
+        try:
+            python_core = winreg.CreateKey(winreg.HKEY_LOCAL_MACHINE,
+                                           "Software\\Python\\PythonCore")
+        except WindowsError:
+            # No registered Python installations
+            return {}
+        i = 0
+        versions = []
+        while True:
+            try:
+                versions.append(winreg.EnumKey(python_core, i))
+                i = i + 1
+            except WindowsError:
+                break
+        exes = dict()
+        for ver in versions:
+            try:
+                path = winreg.QueryValue(python_core, "%s\\InstallPath" % ver)
+            except WindowsError:
+                continue
+            exes[ver] = join(path, "python.exe")
+
+        winreg.CloseKey(python_core)
+
+        # Add the major versions
+        # Sort the keys, then repeatedly update the major version entry
+        # Last executable (i.e., highest version) wins with this approach
+        for ver in sorted(exes):
+            exes[ver[0]] = exes[ver]
+
+        return exes
+
+REQUIRED_MODULES = ['os', 'posix', 'posixpath', 'nt', 'ntpath', 'genericpath',
+                    'fnmatch', 'locale', 'encodings', 'codecs',
+                    'stat', 'UserDict', 'readline', 'copy_reg', 'types',
+                    're', 'sre', 'sre_parse', 'sre_constants', 'sre_compile',
+                    'zlib']
+
+REQUIRED_FILES = ['lib-dynload', 'config']
+
+majver, minver = sys.version_info[:2]
+if majver == 2:
+    if minver >= 6:
+        REQUIRED_MODULES.extend(['warnings', 'linecache', '_abcoll', 'abc'])
+    if minver >= 7:
+        REQUIRED_MODULES.extend(['_weakrefset'])
+    if is_msys2:
+        REQUIRED_MODULES.extend(['functools'])
+elif majver == 3:
+    # Some extra modules are needed for Python 3, but different ones
+    # for different versions.
+    REQUIRED_MODULES.extend([
+    	'_abcoll', 'warnings', 'linecache', 'abc', 'io', '_weakrefset',
+    	'copyreg', 'tempfile', 'random', '__future__', 'collections',
+    	'keyword', 'tarfile', 'shutil', 'struct', 'copy', 'tokenize',
+    	'token', 'functools', 'heapq', 'bisect', 'weakref', 'reprlib'
+    ])
+    if minver >= 2:
+        REQUIRED_FILES[-1] = 'config-%s' % majver
+    if minver >= 3:
+        import sysconfig
+        platdir = sysconfig.get_config_var('PLATDIR')
+        REQUIRED_FILES.append(platdir)
+        REQUIRED_MODULES.extend([
+        	'base64', '_dummy_thread', 'hashlib', 'hmac',
+        	'imp', 'importlib', 'rlcompleter'
+        ])
+    if minver >= 4:
+        REQUIRED_MODULES.extend([
+            'operator',
+            '_collections_abc',
+            '_bootlocale',
+        ])
+
+if is_pypy:
+    # these are needed to correctly display the exceptions that may happen
+    # during the bootstrap
+    REQUIRED_MODULES.extend(['traceback', 'linecache'])
+
+
+class Logger(object):
+
+    """
+    Logging object for use in command-line script.  Allows ranges of
+    levels, to avoid some redundancy of displayed information.
+    """
+
+    DEBUG = logging.DEBUG
+    INFO = logging.INFO
+    NOTIFY = (logging.INFO+logging.WARN)/2
+    WARN = WARNING = logging.WARN
+    ERROR = logging.ERROR
+    FATAL = logging.FATAL
+
+    LEVELS = [DEBUG, INFO, NOTIFY, WARN, ERROR, FATAL]
+
+    def __init__(self, consumers):
+        self.consumers = consumers
+        self.indent = 0
+        self.in_progress = None
+        self.in_progress_hanging = False
+
+    def debug(self, msg, *args, **kw):
+        self.log(self.DEBUG, msg, *args, **kw)
+
+    def info(self, msg, *args, **kw):
+        self.log(self.INFO, msg, *args, **kw)
+
+    def notify(self, msg, *args, **kw):
+        self.log(self.NOTIFY, msg, *args, **kw)
+
+    def warn(self, msg, *args, **kw):
+        self.log(self.WARN, msg, *args, **kw)
+
+    def error(self, msg, *args, **kw):
+        self.log(self.ERROR, msg, *args, **kw)
+
+    def fatal(self, msg, *args, **kw):
+        self.log(self.FATAL, msg, *args, **kw)
+
+    def log(self, level, msg, *args, **kw):
+        if args:
+            if kw:
+                raise TypeError(
+                    "You may give positional or keyword arguments, not both")
+        args = args or kw
+        rendered = None
+        for consumer_level, consumer in self.consumers:
+            if self.level_matches(level, consumer_level):
+                if (self.in_progress_hanging
+                    and consumer in (sys.stdout, sys.stderr)):
+                    self.in_progress_hanging = False
+                    sys.stdout.write('\n')
+                    sys.stdout.flush()
+                if rendered is None:
+                    if args:
+                        rendered = msg % args
+                    else:
+                        rendered = msg
+                    rendered = ' '*self.indent + rendered
+                if hasattr(consumer, 'write'):
+                    consumer.write(rendered+'\n')
+                else:
+                    consumer(rendered)
+
+    def start_progress(self, msg):
+        assert not self.in_progress, (
+            "Tried to start_progress(%r) while in_progress %r"
+            % (msg, self.in_progress))
+        if self.level_matches(self.NOTIFY, self._stdout_level()):
+            sys.stdout.write(msg)
+            sys.stdout.flush()
+            self.in_progress_hanging = True
+        else:
+            self.in_progress_hanging = False
+        self.in_progress = msg
+
+    def end_progress(self, msg='done.'):
+        assert self.in_progress, (
+            "Tried to end_progress without start_progress")
+        if self.stdout_level_matches(self.NOTIFY):
+            if not self.in_progress_hanging:
+                # Some message has been printed out since start_progress
+                sys.stdout.write('...' + self.in_progress + msg + '\n')
+                sys.stdout.flush()
+            else:
+                sys.stdout.write(msg + '\n')
+                sys.stdout.flush()
+        self.in_progress = None
+        self.in_progress_hanging = False
+
+    def show_progress(self):
+        """If we are in a progress scope, and no log messages have been
+        shown, write out another '.'"""
+        if self.in_progress_hanging:
+            sys.stdout.write('.')
+            sys.stdout.flush()
+
+    def stdout_level_matches(self, level):
+        """Returns true if a message at this level will go to stdout"""
+        return self.level_matches(level, self._stdout_level())
+
+    def _stdout_level(self):
+        """Returns the level that stdout runs at"""
+        for level, consumer in self.consumers:
+            if consumer is sys.stdout:
+                return level
+        return self.FATAL
+
+    def level_matches(self, level, consumer_level):
+        """
+        >>> l = Logger([])
+        >>> l.level_matches(3, 4)
+        False
+        >>> l.level_matches(3, 2)
+        True
+        >>> l.level_matches(slice(None, 3), 3)
+        False
+        >>> l.level_matches(slice(None, 3), 2)
+        True
+        >>> l.level_matches(slice(1, 3), 1)
+        True
+        >>> l.level_matches(slice(2, 3), 1)
+        False
+        """
+        if isinstance(level, slice):
+            start, stop = level.start, level.stop
+            if start is not None and start > consumer_level:
+                return False
+            if stop is not None and stop <= consumer_level:
+                return False
+            return True
+        else:
+            return level >= consumer_level
+
+    #@classmethod
+    def level_for_integer(cls, level):
+        levels = cls.LEVELS
+        if level < 0:
+            return levels[0]
+        if level >= len(levels):
+            return levels[-1]
+        return levels[level]
+
+    level_for_integer = classmethod(level_for_integer)
+
+# create a silent logger just to prevent this from being undefined
+# will be overridden with requested verbosity main() is called.
+logger = Logger([(Logger.LEVELS[-1], sys.stdout)])
+
+def mkdir(path):
+    if not os.path.exists(path):
+        logger.info('Creating %s', path)
+        os.makedirs(path)
+    else:
+        logger.info('Directory %s already exists', path)
+
+def copyfileordir(src, dest, symlink=True):
+    if os.path.isdir(src):
+        shutil.copytree(src, dest, symlink)
+    else:
+        shutil.copy2(src, dest)
+
+def copyfile(src, dest, symlink=True):
+    if not os.path.exists(src):
+        # Some bad symlink in the src
+        logger.warn('Cannot find file %s (bad symlink)', src)
+        return
+    if os.path.exists(dest):
+        logger.debug('File %s already exists', dest)
+        return
+    if not os.path.exists(os.path.dirname(dest)):
+        logger.info('Creating parent directories for %s', os.path.dirname(dest))
+        os.makedirs(os.path.dirname(dest))
+    if not os.path.islink(src):
+        srcpath = os.path.abspath(src)
+    else:
+        srcpath = os.readlink(src)
+    if symlink and hasattr(os, 'symlink') and not is_win:
+        logger.info('Symlinking %s', dest)
+        try:
+            os.symlink(srcpath, dest)
+        except (OSError, NotImplementedError):
+            logger.info('Symlinking failed, copying to %s', dest)
+            copyfileordir(src, dest, symlink)
+    else:
+        logger.info('Copying to %s', dest)
+        copyfileordir(src, dest, symlink)
+
+def writefile(dest, content, overwrite=True):
+    if not os.path.exists(dest):
+        logger.info('Writing %s', dest)
+        with open(dest, 'wb') as f:
+            f.write(content.encode('utf-8'))
+        return
+    else:
+        with open(dest, 'rb') as f:
+            c = f.read()
+        if c != content.encode("utf-8"):
+            if not overwrite:
+                logger.notify('File %s exists with different content; not overwriting', dest)
+                return
+            logger.notify('Overwriting %s with new content', dest)
+            with open(dest, 'wb') as f:
+                f.write(content.encode('utf-8'))
+        else:
+            logger.info('Content %s already in place', dest)
+
+def rmtree(dir):
+    if os.path.exists(dir):
+        logger.notify('Deleting tree %s', dir)
+        shutil.rmtree(dir)
+    else:
+        logger.info('Do not need to delete %s; already gone', dir)
+
+def make_exe(fn):
+    if hasattr(os, 'chmod'):
+        oldmode = os.stat(fn).st_mode & 0xFFF # 0o7777
+        newmode = (oldmode | 0x16D) & 0xFFF # 0o555, 0o7777
+        os.chmod(fn, newmode)
+        logger.info('Changed mode of %s to %s', fn, oct(newmode))
+
+def _find_file(filename, dirs):
+    for dir in reversed(dirs):
+        files = glob.glob(os.path.join(dir, filename))
+        if files and os.path.isfile(files[0]):
+            return True, files[0]
+    return False, filename
+
+def file_search_dirs():
+    here = os.path.dirname(os.path.abspath(__file__))
+    dirs = [here, join(here, 'virtualenv_support')]
+    if os.path.splitext(os.path.dirname(__file__))[0] != 'virtualenv':
+        # Probably some boot script; just in case virtualenv is installed...
+        try:
+            import virtualenv
+        except ImportError:
+            pass
+        else:
+            dirs.append(os.path.join(
+                os.path.dirname(virtualenv.__file__), 'virtualenv_support'))
+    return [d for d in dirs if os.path.isdir(d)]
+
+
+class UpdatingDefaultsHelpFormatter(optparse.IndentedHelpFormatter):
+    """
+    Custom help formatter for use in ConfigOptionParser that updates
+    the defaults before expanding them, allowing them to show up correctly
+    in the help listing
+    """
+    def expand_default(self, option):
+        if self.parser is not None:
+            self.parser.update_defaults(self.parser.defaults)
+        return optparse.IndentedHelpFormatter.expand_default(self, option)
+
+
+class ConfigOptionParser(optparse.OptionParser):
+    """
+    Custom option parser which updates its defaults by checking the
+    configuration files and environmental variables
+    """
+    def __init__(self, *args, **kwargs):
+        self.config = ConfigParser.RawConfigParser()
+        self.files = self.get_config_files()
+        self.config.read(self.files)
+        optparse.OptionParser.__init__(self, *args, **kwargs)
+
+    def get_config_files(self):
+        config_file = os.environ.get('VIRTUALENV_CONFIG_FILE', False)
+        if config_file and os.path.exists(config_file):
+            return [config_file]
+        return [default_config_file]
+
+    def update_defaults(self, defaults):
+        """
+        Updates the given defaults with values from the config files and
+        the environ. Does a little special handling for certain types of
+        options (lists).
+        """
+        # Then go and look for the other sources of configuration:
+        config = {}
+        # 1. config files
+        config.update(dict(self.get_config_section('virtualenv')))
+        # 2. environmental variables
+        config.update(dict(self.get_environ_vars()))
+        # Then set the options with those values
+        for key, val in config.items():
+            key = key.replace('_', '-')
+            if not key.startswith('--'):
+                key = '--%s' % key  # only prefer long opts
+            option = self.get_option(key)
+            if option is not None:
+                # ignore empty values
+                if not val:
+                    continue
+                # handle multiline configs
+                if option.action == 'append':
+                    val = val.split()
+                else:
+                    option.nargs = 1
+                if option.action == 'store_false':
+                    val = not strtobool(val)
+                elif option.action in ('store_true', 'count'):
+                    val = strtobool(val)
+                try:
+                    val = option.convert_value(key, val)
+                except optparse.OptionValueError:
+                    e = sys.exc_info()[1]
+                    print("An error occurred during configuration: %s" % e)
+                    sys.exit(3)
+                defaults[option.dest] = val
+        return defaults
+
+    def get_config_section(self, name):
+        """
+        Get a section of a configuration
+        """
+        if self.config.has_section(name):
+            return self.config.items(name)
+        return []
+
+    def get_environ_vars(self, prefix='VIRTUALENV_'):
+        """
+        Returns a generator with all environmental vars with prefix VIRTUALENV
+        """
+        for key, val in os.environ.items():
+            if key.startswith(prefix):
+                yield (key.replace(prefix, '').lower(), val)
+
+    def get_default_values(self):
+        """
+        Overridding to make updating the defaults after instantiation of
+        the option parser possible, update_defaults() does the dirty work.
+        """
+        if not self.process_default_values:
+            # Old, pre-Optik 1.5 behaviour.
+            return optparse.Values(self.defaults)
+
+        defaults = self.update_defaults(self.defaults.copy())  # ours
+        for option in self._get_all_options():
+            default = defaults.get(option.dest)
+            if isinstance(default, basestring):
+                opt_str = option.get_opt_string()
+                defaults[option.dest] = option.check_value(opt_str, default)
+        return optparse.Values(defaults)
+
+
+def main():
+    parser = ConfigOptionParser(
+        version=virtualenv_version,
+        usage="%prog [OPTIONS] DEST_DIR",
+        formatter=UpdatingDefaultsHelpFormatter())
+
+    parser.add_option(
+        '-v', '--verbose',
+        action='count',
+        dest='verbose',
+        default=0,
+        help="Increase verbosity.")
+
+    parser.add_option(
+        '-q', '--quiet',
+        action='count',
+        dest='quiet',
+        default=0,
+        help='Decrease verbosity.')
+
+    parser.add_option(
+        '-p', '--python',
+        dest='python',
+        metavar='PYTHON_EXE',
+        help='The Python interpreter to use, e.g., --python=python2.5 will use the python2.5 '
+        'interpreter to create the new environment.  The default is the interpreter that '
+        'virtualenv was installed with (%s)' % sys.executable)
+
+    parser.add_option(
+        '--clear',
+        dest='clear',
+        action='store_true',
+        help="Clear out the non-root install and start from scratch.")
+
+    parser.set_defaults(system_site_packages=False)
+    parser.add_option(
+        '--no-site-packages',
+        dest='system_site_packages',
+        action='store_false',
+        help="DEPRECATED. Retained only for backward compatibility. "
+             "Not having access to global site-packages is now the default behavior.")
+
+    parser.add_option(
+        '--system-site-packages',
+        dest='system_site_packages',
+        action='store_true',
+        help="Give the virtual environment access to the global site-packages.")
+
+    parser.add_option(
+        '--always-copy',
+        dest='symlink',
+        action='store_false',
+        default=True,
+        help="Always copy files rather than symlinking.")
+
+    parser.add_option(
+        '--unzip-setuptools',
+        dest='unzip_setuptools',
+        action='store_true',
+        help="Unzip Setuptools when installing it.")
+
+    parser.add_option(
+        '--relocatable',
+        dest='relocatable',
+        action='store_true',
+        help='Make an EXISTING virtualenv environment relocatable. '
+             'This fixes up scripts and makes all .pth files relative.')
+
+    parser.add_option(
+        '--no-setuptools',
+        dest='no_setuptools',
+        action='store_true',
+        help='Do not install setuptools in the new virtualenv.')
+
+    parser.add_option(
+        '--no-pip',
+        dest='no_pip',
+        action='store_true',
+        help='Do not install pip in the new virtualenv.')
+
+    parser.add_option(
+        '--no-wheel',
+        dest='no_wheel',
+        action='store_true',
+        help='Do not install wheel in the new virtualenv.')
+
+    default_search_dirs = file_search_dirs()
+    parser.add_option(
+        '--extra-search-dir',
+        dest="search_dirs",
+        action="append",
+        metavar='DIR',
+        default=default_search_dirs,
+        help="Directory to look for setuptools/pip distributions in. "
+              "This option can be used multiple times.")
+
+    parser.add_option(
+        "--download",
+        dest="download",
+        default=True,
+        action="store_true",
+        help="Download preinstalled packages from PyPI.",
+    )
+
+    parser.add_option(
+        "--no-download",
+        '--never-download',
+        dest="download",
+        action="store_false",
+        help="Do not download preinstalled packages from PyPI.",
+    )
+
+    parser.add_option(
+        '--prompt',
+        dest='prompt',
+        help='Provides an alternative prompt prefix for this environment.')
+
+    parser.add_option(
+        '--setuptools',
+        dest='setuptools',
+        action='store_true',
+        help="DEPRECATED. Retained only for backward compatibility. This option has no effect.")
+
+    parser.add_option(
+        '--distribute',
+        dest='distribute',
+        action='store_true',
+        help="DEPRECATED. Retained only for backward compatibility. This option has no effect.")
+
+    if 'extend_parser' in globals():
+        extend_parser(parser)
+
+    options, args = parser.parse_args()
+
+    global logger
+
+    if 'adjust_options' in globals():
+        adjust_options(options, args)
+
+    verbosity = options.verbose - options.quiet
+    logger = Logger([(Logger.level_for_integer(2 - verbosity), sys.stdout)])
+
+    if options.python and not os.environ.get('VIRTUALENV_INTERPRETER_RUNNING'):
+        env = os.environ.copy()
+        interpreter = resolve_interpreter(options.python)
+        if interpreter == sys.executable:
+            logger.warn('Already using interpreter %s' % interpreter)
+        else:
+            logger.notify('Running virtualenv with interpreter %s' % interpreter)
+            env['VIRTUALENV_INTERPRETER_RUNNING'] = 'true'
+            file = __file__
+            if file.endswith('.pyc'):
+                file = file[:-1]
+            popen = subprocess.Popen([interpreter, file] + sys.argv[1:], env=env)
+            raise SystemExit(popen.wait())
+
+    if not args:
+        print('You must provide a DEST_DIR')
+        parser.print_help()
+        sys.exit(2)
+    if len(args) > 1:
+        print('There must be only one argument: DEST_DIR (you gave %s)' % (
+            ' '.join(args)))
+        parser.print_help()
+        sys.exit(2)
+
+    home_dir = args[0]
+
+    if os.path.exists(home_dir) and os.path.isfile(home_dir):
+        logger.fatal('ERROR: File already exists and is not a directory.')
+        logger.fatal('Please provide a different path or delete the file.')
+        sys.exit(3)
+
+    if os.environ.get('WORKING_ENV'):
+        logger.fatal('ERROR: you cannot run virtualenv while in a workingenv')
+        logger.fatal('Please deactivate your workingenv, then re-run this script')
+        sys.exit(3)
+
+    if 'PYTHONHOME' in os.environ:
+        logger.warn('PYTHONHOME is set.  You *must* activate the virtualenv before using it')
+        del os.environ['PYTHONHOME']
+
+    if options.relocatable:
+        make_environment_relocatable(home_dir)
+        return
+
+    create_environment(home_dir,
+                       site_packages=options.system_site_packages,
+                       clear=options.clear,
+                       unzip_setuptools=options.unzip_setuptools,
+                       prompt=options.prompt,
+                       search_dirs=options.search_dirs,
+                       download=options.download,
+                       no_setuptools=options.no_setuptools,
+                       no_pip=options.no_pip,
+                       no_wheel=options.no_wheel,
+                       symlink=options.symlink and hasattr(os, 'symlink')) # MOZ: Make sure we don't use symlink when we don't have it
+    if 'after_install' in globals():
+        after_install(options, home_dir)
+
+def call_subprocess(cmd, show_stdout=True,
+                    filter_stdout=None, cwd=None,
+                    raise_on_returncode=True, extra_env=None,
+                    remove_from_env=None, stdin=None):
+    cmd_parts = []
+    for part in cmd:
+        if len(part) > 45:
+            part = part[:20]+"..."+part[-20:]
+        if ' ' in part or '\n' in part or '"' in part or "'" in part:
+            part = '"%s"' % part.replace('"', '\\"')
+        if hasattr(part, 'decode'):
+            try:
+                part = part.decode(sys.getdefaultencoding())
+            except UnicodeDecodeError:
+                part = part.decode(sys.getfilesystemencoding())
+        cmd_parts.append(part)
+    cmd_desc = ' '.join(cmd_parts)
+    if show_stdout:
+        stdout = None
+    else:
+        stdout = subprocess.PIPE
+    logger.debug("Running command %s" % cmd_desc)
+    if extra_env or remove_from_env:
+        env = os.environ.copy()
+        if extra_env:
+            env.update(extra_env)
+        if remove_from_env:
+            for varname in remove_from_env:
+                env.pop(varname, None)
+    else:
+        env = None
+    try:
+        proc = subprocess.Popen(
+            cmd, stderr=subprocess.STDOUT,
+            stdin=None if stdin is None else subprocess.PIPE,
+            stdout=stdout,
+            cwd=cwd, env=env)
+    except Exception:
+        e = sys.exc_info()[1]
+        logger.fatal(
+            "Error %s while executing command %s" % (e, cmd_desc))
+        raise
+    all_output = []
+    if stdout is not None:
+        if stdin is not None:
+            proc.stdin.write(stdin)
+            proc.stdin.close()
+
+        stdout = proc.stdout
+        encoding = sys.getdefaultencoding()
+        fs_encoding = sys.getfilesystemencoding()
+        while 1:
+            line = stdout.readline()
+            try:
+                line = line.decode(encoding)
+            except UnicodeDecodeError:
+                line = line.decode(fs_encoding)
+            if not line:
+                break
+            line = line.rstrip()
+            all_output.append(line)
+            if filter_stdout:
+                level = filter_stdout(line)
+                if isinstance(level, tuple):
+                    level, line = level
+                logger.log(level, line)
+                if not logger.stdout_level_matches(level):
+                    logger.show_progress()
+            else:
+                logger.info(line)
+    else:
+        proc.communicate(stdin)
+    proc.wait()
+    if proc.returncode:
+        if raise_on_returncode:
+            if all_output:
+                logger.notify('Complete output from command %s:' % cmd_desc)
+                logger.notify('\n'.join(all_output) + '\n----------------------------------------')
+            raise OSError(
+                "Command %s failed with error code %s"
+                % (cmd_desc, proc.returncode))
+        else:
+            logger.warn(
+                "Command %s had error code %s"
+                % (cmd_desc, proc.returncode))
+
+def filter_install_output(line):
+    if line.strip().startswith('running'):
+        return Logger.INFO
+    return Logger.DEBUG
+
+def find_wheels(projects, search_dirs):
+    """Find wheels from which we can import PROJECTS.
+
+    Scan through SEARCH_DIRS for a wheel for each PROJECT in turn. Return
+    a list of the first wheel found for each PROJECT
+    """
+
+    wheels = []
+
+    # Look through SEARCH_DIRS for the first suitable wheel. Don't bother
+    # about version checking here, as this is simply to get something we can
+    # then use to install the correct version.
+    for project in projects:
+        for dirname in search_dirs:
+            # This relies on only having "universal" wheels available.
+            # The pattern could be tightened to require -py2.py3-none-any.whl.
+            files = glob.glob(os.path.join(dirname, project + '-*.whl'))
+            if files:
+                wheels.append(os.path.abspath(files[0]))
+                break
+        else:
+            # We're out of luck, so quit with a suitable error
+            logger.fatal('Cannot find a wheel for %s' % (project,))
+
+    return wheels
+
+def install_wheel(project_names, py_executable, search_dirs=None,
+                  download=False):
+    if search_dirs is None:
+        search_dirs = file_search_dirs()
+
+    wheels = find_wheels(['setuptools', 'pip'], search_dirs)
+    pythonpath = os.pathsep.join(wheels)
+
+    # PIP_FIND_LINKS uses space as the path separator and thus cannot have paths
+    # with spaces in them. Convert any of those to local file:// URL form.
+    try:
+        from urlparse import urljoin
+        from urllib import pathname2url
+    except ImportError:
+        from urllib.parse import urljoin
+        from urllib.request import pathname2url
+    def space_path2url(p):
+        if ' ' not in p:
+            return p
+        return urljoin('file:', pathname2url(os.path.abspath(p)))
+    findlinks = ' '.join(space_path2url(d) for d in search_dirs)
+
+    SCRIPT = textwrap.dedent("""
+        import sys
+        import pkgutil
+        import tempfile
+        import os
+
+        import pip
+
+        cert_data = pkgutil.get_data("pip._vendor.requests", "cacert.pem")
+        if cert_data is not None:
+            cert_file = tempfile.NamedTemporaryFile(delete=False)
+            cert_file.write(cert_data)
+            cert_file.close()
+        else:
+            cert_file = None
+
+        try:
+            args = ["install", "--ignore-installed"]
+            if cert_file is not None:
+                args += ["--cert", cert_file.name]
+            args += sys.argv[1:]
+
+            sys.exit(pip.main(args))
+        finally:
+            if cert_file is not None:
+                os.remove(cert_file.name)
+    """).encode("utf8")
+
+    cmd = [py_executable, '-'] + project_names
+    logger.start_progress('Installing %s...' % (', '.join(project_names)))
+    logger.indent += 2
+
+    env = {
+        "PYTHONPATH": pythonpath,
+        "JYTHONPATH": pythonpath,  # for Jython < 3.x
+        "PIP_FIND_LINKS": findlinks,
+        "PIP_USE_WHEEL": "1",
+        "PIP_ONLY_BINARY": ":all:",
+        "PIP_PRE": "1",
+        "PIP_USER": "0",
+    }
+
+    if not download:
+        env["PIP_NO_INDEX"] = "1"
+
+    try:
+        call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
+    finally:
+        logger.indent -= 2
+        logger.end_progress()
+
+
+def create_environment(home_dir, site_packages=False, clear=False,
+                       unzip_setuptools=False,
+                       prompt=None, search_dirs=None, download=False,
+                       no_setuptools=False, no_pip=False, no_wheel=False,
+                       symlink=True):
+    """
+    Creates a new environment in ``home_dir``.
+
+    If ``site_packages`` is true, then the global ``site-packages/``
+    directory will be on the path.
+
+    If ``clear`` is true (default False) then the environment will
+    first be cleared.
+    """
+    home_dir, lib_dir, inc_dir, bin_dir = path_locations(home_dir)
+
+    py_executable = os.path.abspath(install_python(
+        home_dir, lib_dir, inc_dir, bin_dir,
+        site_packages=site_packages, clear=clear, symlink=symlink))
+
+    install_distutils(home_dir)
+
+    to_install = []
+
+    if not no_setuptools:
+        to_install.append('setuptools')
+
+    if not no_pip:
+        to_install.append('pip')
+
+    if not no_wheel:
+        to_install.append('wheel')
+
+    if to_install:
+        install_wheel(
+            to_install,
+            py_executable,
+            search_dirs,
+            download=download,
+        )
+
+    install_activate(home_dir, bin_dir, prompt)
+
+    install_python_config(home_dir, bin_dir, prompt)
+
+def is_executable_file(fpath):
+    return os.path.isfile(fpath) and os.access(fpath, os.X_OK)
+
+def path_locations(home_dir):
+    """Return the path locations for the environment (where libraries are,
+    where scripts go, etc)"""
+    home_dir = os.path.abspath(home_dir)
+    # XXX: We'd use distutils.sysconfig.get_python_inc/lib but its
+    # prefix arg is broken: http://bugs.python.org/issue3386
+    if is_win:
+        # Windows has lots of problems with executables with spaces in
+        # the name; this function will remove them (using the ~1
+        # format):
+        mkdir(home_dir)
+        if ' ' in home_dir:
+            import ctypes
+            GetShortPathName = ctypes.windll.kernel32.GetShortPathNameW
+            size = max(len(home_dir)+1, 256)
+            buf = ctypes.create_unicode_buffer(size)
+            try:
+                u = unicode
+            except NameError:
+                u = str
+            ret = GetShortPathName(u(home_dir), buf, size)
+            if not ret:
+                print('Error: the path "%s" has a space in it' % home_dir)
+                print('We could not determine the short pathname for it.')
+                print('Exiting.')
+                sys.exit(3)
+            home_dir = str(buf.value)
+        lib_dir = join(home_dir, 'Lib')
+        inc_dir = join(home_dir, 'Include')
+        bin_dir = join(home_dir, 'Scripts')
+    if is_jython:
+        lib_dir = join(home_dir, 'Lib')
+        inc_dir = join(home_dir, 'Include')
+        bin_dir = join(home_dir, 'bin')
+    elif is_pypy:
+        lib_dir = home_dir
+        inc_dir = join(home_dir, 'include')
+        bin_dir = join(home_dir, 'bin')
+    elif not is_win:
+        lib_dir = join(home_dir, 'lib', py_version)
+        inc_dir = join(home_dir, 'include', py_version + abiflags)
+        bin_dir = join(home_dir, 'bin')
+    return home_dir, lib_dir, inc_dir, bin_dir
+
+
+def change_prefix(filename, dst_prefix):
+    prefixes = [sys.prefix]
+
+    if is_darwin:
+        prefixes.extend((
+            os.path.join("/Library/Python", sys.version[:3], "site-packages"),
+            os.path.join(sys.prefix, "Extras", "lib", "python"),
+            os.path.join("~", "Library", "Python", sys.version[:3], "site-packages"),
+            # Python 2.6 no-frameworks
+            os.path.join("~", ".local", "lib","python", sys.version[:3], "site-packages"),
+            # System Python 2.7 on OSX Mountain Lion
+            os.path.join("~", "Library", "Python", sys.version[:3], "lib", "python", "site-packages")))
+
+    if hasattr(sys, 'real_prefix'):
+        prefixes.append(sys.real_prefix)
+    if hasattr(sys, 'base_prefix'):
+        prefixes.append(sys.base_prefix)
+    prefixes = list(map(os.path.expanduser, prefixes))
+    prefixes = list(map(os.path.abspath, prefixes))
+    # Check longer prefixes first so we don't split in the middle of a filename
+    prefixes = sorted(prefixes, key=len, reverse=True)
+    filename = os.path.abspath(filename)
+    # On Windows, make sure drive letter is uppercase
+    if is_win and filename[0] in 'abcdefghijklmnopqrstuvwxyz':
+        filename = filename[0].upper() + filename[1:]
+    for i, prefix in enumerate(prefixes):
+        if is_win and prefix[0] in 'abcdefghijklmnopqrstuvwxyz':
+            prefixes[i] = prefix[0].upper() + prefix[1:]
+    for src_prefix in prefixes:
+        if filename.startswith(src_prefix):
+            _, relpath = filename.split(src_prefix, 1)
+            if src_prefix != os.sep: # sys.prefix == "/"
+                assert relpath[0] == os.sep
+                relpath = relpath[1:]
+            return join(dst_prefix, relpath)
+    assert False, "Filename %s does not start with any of these prefixes: %s" % \
+        (filename, prefixes)
+
+def copy_required_modules(dst_prefix, symlink):
+    import imp
+
+    for modname in REQUIRED_MODULES:
+        if modname in sys.builtin_module_names:
+            logger.info("Ignoring built-in bootstrap module: %s" % modname)
+            continue
+        try:
+            f, filename, _ = imp.find_module(modname)
+        except ImportError:
+            logger.info("Cannot import bootstrap module: %s" % modname)
+        else:
+            if f is not None:
+                f.close()
+            # special-case custom readline.so on OS X, but not for pypy:
+            if modname == 'readline' and sys.platform == 'darwin' and not (
+                    is_pypy or filename.endswith(join('lib-dynload', 'readline.so'))):
+                dst_filename = join(dst_prefix, 'lib', 'python%s' % sys.version[:3], 'readline.so')
+            elif modname == 'readline' and sys.platform == 'win32':
+                # special-case for Windows, where readline is not a
+                # standard module, though it may have been installed in
+                # site-packages by a third-party package
+                pass
+            else:
+                dst_filename = change_prefix(filename, dst_prefix)
+            copyfile(filename, dst_filename, symlink)
+            if filename.endswith('.pyc'):
+                pyfile = filename[:-1]
+                if os.path.exists(pyfile):
+                    copyfile(pyfile, dst_filename[:-1], symlink)
+
+
+def subst_path(prefix_path, prefix, home_dir):
+    prefix_path = os.path.normpath(prefix_path)
+    prefix = os.path.normpath(prefix)
+    home_dir = os.path.normpath(home_dir)
+    if not prefix_path.startswith(prefix):
+        logger.warn('Path not in prefix %r %r', prefix_path, prefix)
+        return
+    return prefix_path.replace(prefix, home_dir, 1)
+
+
+def install_python(home_dir, lib_dir, inc_dir, bin_dir, site_packages, clear, symlink=True):
+    """Install just the base environment, no distutils patches etc"""
+    if sys.executable.startswith(bin_dir):
+        print('Please use the *system* python to run this script')
+        return
+
+    if clear:
+        rmtree(lib_dir)
+        ## FIXME: why not delete it?
+        ## Maybe it should delete everything with #!/path/to/venv/python in it
+        logger.notify('Not deleting %s', bin_dir)
+
+    if hasattr(sys, 'real_prefix'):
+        logger.notify('Using real prefix %r' % sys.real_prefix)
+        prefix = sys.real_prefix
+    elif hasattr(sys, 'base_prefix'):
+        logger.notify('Using base prefix %r' % sys.base_prefix)
+        prefix = sys.base_prefix
+    else:
+        prefix = sys.prefix
+    mkdir(lib_dir)
+    fix_lib64(lib_dir, symlink)
+    stdlib_dirs = [os.path.dirname(os.__file__)]
+    if is_win:
+        stdlib_dirs.append(join(os.path.dirname(stdlib_dirs[0]), 'DLLs'))
+    elif is_darwin:
+        stdlib_dirs.append(join(stdlib_dirs[0], 'site-packages'))
+    if hasattr(os, 'symlink'):
+        logger.info('Symlinking Python bootstrap modules')
+    else:
+        logger.info('Copying Python bootstrap modules')
+    logger.indent += 2
+    try:
+        # copy required files...
+        for stdlib_dir in stdlib_dirs:
+            if not os.path.isdir(stdlib_dir):
+                continue
+            for fn in os.listdir(stdlib_dir):
+                bn = os.path.splitext(fn)[0]
+                if fn != 'site-packages' and bn in REQUIRED_FILES:
+                    copyfile(join(stdlib_dir, fn), join(lib_dir, fn), symlink)
+        # ...and modules
+        copy_required_modules(home_dir, symlink)
+    finally:
+        logger.indent -= 2
+    mkdir(join(lib_dir, 'site-packages'))
+    import site
+    site_filename = site.__file__
+    if site_filename.endswith('.pyc') or site_filename.endswith('.pyo'):
+        site_filename = site_filename[:-1]
+    elif site_filename.endswith('$py.class'):
+        site_filename = site_filename.replace('$py.class', '.py')
+    site_filename_dst = change_prefix(site_filename, home_dir)
+    site_dir = os.path.dirname(site_filename_dst)
+    # MOZ: Copies a site.py if it exists instead of using the one hex encoded in
+    # this file. Necessary for some site.py fixes for MinGW64 version of python
+    site_py_src_path = os.path.join(os.path.dirname(__file__), 'site.py')
+    if os.path.isfile(site_py_src_path):
+        shutil.copy(site_py_src_path, site_filename_dst)
+    else:
+        writefile(site_filename_dst, SITE_PY)
+    writefile(join(site_dir, 'orig-prefix.txt'), prefix)
+    site_packages_filename = join(site_dir, 'no-global-site-packages.txt')
+    if not site_packages:
+        writefile(site_packages_filename, '')
+
+    if is_pypy or is_win:
+        stdinc_dir = join(prefix, 'include')
+    else:
+        stdinc_dir = join(prefix, 'include', py_version + abiflags)
+    if os.path.exists(stdinc_dir):
+        copyfile(stdinc_dir, inc_dir, symlink)
+    else:
+        logger.debug('No include dir %s' % stdinc_dir)
+
+    platinc_dir = distutils.sysconfig.get_python_inc(plat_specific=1)
+    if platinc_dir != stdinc_dir:
+        platinc_dest = distutils.sysconfig.get_python_inc(
+            plat_specific=1, prefix=home_dir)
+        if platinc_dir == platinc_dest:
+            # Do platinc_dest manually due to a CPython bug;
+            # not http://bugs.python.org/issue3386 but a close cousin
+            platinc_dest = subst_path(platinc_dir, prefix, home_dir)
+        if platinc_dest:
+            # PyPy's stdinc_dir and prefix are relative to the original binary
+            # (traversing virtualenvs), whereas the platinc_dir is relative to
+            # the inner virtualenv and ignores the prefix argument.
+            # This seems more evolved than designed.
+            copyfile(platinc_dir, platinc_dest, symlink)
+
+    # pypy never uses exec_prefix, just ignore it
+    if sys.exec_prefix != prefix and not is_pypy:
+        if is_win:
+            exec_dir = join(sys.exec_prefix, 'lib')
+        elif is_jython:
+            exec_dir = join(sys.exec_prefix, 'Lib')
+        else:
+            exec_dir = join(sys.exec_prefix, 'lib', py_version)
+        for fn in os.listdir(exec_dir):
+            copyfile(join(exec_dir, fn), join(lib_dir, fn), symlink)
+
+    if is_jython:
+        # Jython has either jython-dev.jar and javalib/ dir, or just
+        # jython.jar
+        for name in 'jython-dev.jar', 'javalib', 'jython.jar':
+            src = join(prefix, name)
+            if os.path.exists(src):
+                copyfile(src, join(home_dir, name), symlink)
+        # XXX: registry should always exist after Jython 2.5rc1
+        src = join(prefix, 'registry')
+        if os.path.exists(src):
+            copyfile(src, join(home_dir, 'registry'), symlink=False)
+        copyfile(join(prefix, 'cachedir'), join(home_dir, 'cachedir'),
+                 symlink=False)
+
+    mkdir(bin_dir)
+    py_executable = join(bin_dir, os.path.basename(sys.executable))
+    if 'Python.framework' in prefix:
+        # OS X framework builds cause validation to break
+        # https://github.com/pypa/virtualenv/issues/322
+        if os.environ.get('__PYVENV_LAUNCHER__'):
+            del os.environ["__PYVENV_LAUNCHER__"]
+        if re.search(r'/Python(?:-32|-64)*$', py_executable):
+            # The name of the python executable is not quite what
+            # we want, rename it.
+            py_executable = os.path.join(
+                    os.path.dirname(py_executable), 'python')
+
+    logger.notify('New %s executable in %s', expected_exe, py_executable)
+    pcbuild_dir = os.path.dirname(sys.executable)
+    pyd_pth = os.path.join(lib_dir, 'site-packages', 'virtualenv_builddir_pyd.pth')
+    if is_win and os.path.exists(os.path.join(pcbuild_dir, 'build.bat')):
+        logger.notify('Detected python running from build directory %s', pcbuild_dir)
+        logger.notify('Writing .pth file linking to build directory for *.pyd files')
+        writefile(pyd_pth, pcbuild_dir)
+    else:
+        pcbuild_dir = None
+        if os.path.exists(pyd_pth):
+            logger.info('Deleting %s (not Windows env or not build directory python)' % pyd_pth)
+            os.unlink(pyd_pth)
+
+    if sys.executable != py_executable:
+        ## FIXME: could I just hard link?
+        executable = sys.executable
+        shutil.copyfile(executable, py_executable)
+        make_exe(py_executable)
+        if is_win or is_cygwin:
+            pythonw = os.path.join(os.path.dirname(sys.executable), 'pythonw.exe')
+            if os.path.exists(pythonw):
+                logger.info('Also created pythonw.exe')
+                shutil.copyfile(pythonw, os.path.join(os.path.dirname(py_executable), 'pythonw.exe'))
+            python_d = os.path.join(os.path.dirname(sys.executable), 'python_d.exe')
+            python_d_dest = os.path.join(os.path.dirname(py_executable), 'python_d.exe')
+            if os.path.exists(python_d):
+                logger.info('Also created python_d.exe')
+                shutil.copyfile(python_d, python_d_dest)
+            elif os.path.exists(python_d_dest):
+                logger.info('Removed python_d.exe as it is no longer at the source')
+                os.unlink(python_d_dest)
+            # we need to copy the DLL to enforce that windows will load the correct one.
+            # may not exist if we are cygwin.
+            py_executable_dll = 'python%s%s.dll' % (
+                sys.version_info[0], sys.version_info[1])
+            py_executable_dll_d = 'python%s%s_d.dll' % (
+                sys.version_info[0], sys.version_info[1])
+            pythondll = os.path.join(os.path.dirname(sys.executable), py_executable_dll)
+            pythondll_d = os.path.join(os.path.dirname(sys.executable), py_executable_dll_d)
+            pythondll_d_dest = os.path.join(os.path.dirname(py_executable), py_executable_dll_d)
+            if os.path.exists(pythondll):
+                logger.info('Also created %s' % py_executable_dll)
+                shutil.copyfile(pythondll, os.path.join(os.path.dirname(py_executable), py_executable_dll))
+            if os.path.exists(pythondll_d):
+                logger.info('Also created %s' % py_executable_dll_d)
+                shutil.copyfile(pythondll_d, pythondll_d_dest)
+            elif os.path.exists(pythondll_d_dest):
+                logger.info('Removed %s as the source does not exist' % pythondll_d_dest)
+                os.unlink(pythondll_d_dest)
+        if is_pypy:
+            # make a symlink python --> pypy-c
+            python_executable = os.path.join(os.path.dirname(py_executable), 'python')
+            if sys.platform in ('win32', 'cygwin'):
+                python_executable += '.exe'
+            logger.info('Also created executable %s' % python_executable)
+            copyfile(py_executable, python_executable, symlink)
+
+            if is_win:
+                for name in ['libexpat.dll', 'libpypy.dll', 'libpypy-c.dll',
+                            'libeay32.dll', 'ssleay32.dll', 'sqlite3.dll',
+                            'tcl85.dll', 'tk85.dll']:
+                    src = join(prefix, name)
+                    if os.path.exists(src):
+                        copyfile(src, join(bin_dir, name), symlink)
+
+                for d in sys.path:
+                    if d.endswith('lib_pypy'):
+                        break
+                else:
+                    logger.fatal('Could not find lib_pypy in sys.path')
+                    raise SystemExit(3)
+                logger.info('Copying lib_pypy')
+                copyfile(d, os.path.join(home_dir, 'lib_pypy'), symlink)
+
+    if os.path.splitext(os.path.basename(py_executable))[0] != expected_exe:
+        secondary_exe = os.path.join(os.path.dirname(py_executable),
+                                     expected_exe)
+        py_executable_ext = os.path.splitext(py_executable)[1]
+        if py_executable_ext.lower() == '.exe':
+            # python2.4 gives an extension of '.4' :P
+            secondary_exe += py_executable_ext
+        if os.path.exists(secondary_exe):
+            logger.warn('Not overwriting existing %s script %s (you must use %s)'
+                        % (expected_exe, secondary_exe, py_executable))
+        else:
+            logger.notify('Also creating executable in %s' % secondary_exe)
+            shutil.copyfile(sys.executable, secondary_exe)
+            make_exe(secondary_exe)
+
+    if '.framework' in prefix:
+        if 'Python.framework' in prefix:
+            logger.debug('MacOSX Python framework detected')
+            # Make sure we use the embedded interpreter inside
+            # the framework, even if sys.executable points to
+            # the stub executable in ${sys.prefix}/bin
+            # See http://groups.google.com/group/python-virtualenv/
+            #                              browse_thread/thread/17cab2f85da75951
+            original_python = os.path.join(
+                prefix, 'Resources/Python.app/Contents/MacOS/Python')
+        if 'EPD' in prefix:
+            logger.debug('EPD framework detected')
+            original_python = os.path.join(prefix, 'bin/python')
+        shutil.copy(original_python, py_executable)
+
+        # Copy the framework's dylib into the virtual
+        # environment
+        virtual_lib = os.path.join(home_dir, '.Python')
+
+        if os.path.exists(virtual_lib):
+            os.unlink(virtual_lib)
+        copyfile(
+            os.path.join(prefix, 'Python'),
+            virtual_lib,
+            symlink)
+
+        # And then change the install_name of the copied python executable
+        try:
+            mach_o_change(py_executable,
+                          os.path.join(prefix, 'Python'),
+                          '@executable_path/../.Python')
+        except:
+            e = sys.exc_info()[1]
+            logger.warn("Could not call mach_o_change: %s. "
+                        "Trying to call install_name_tool instead." % e)
+            try:
+                call_subprocess(
+                    ["install_name_tool", "-change",
+                     os.path.join(prefix, 'Python'),
+                     '@executable_path/../.Python',
+                     py_executable])
+            except:
+                logger.fatal("Could not call install_name_tool -- you must "
+                             "have Apple's development tools installed")
+                raise
+
+    if not is_win:
+        # Ensure that 'python', 'pythonX' and 'pythonX.Y' all exist
+        py_exe_version_major = 'python%s' % sys.version_info[0]
+        py_exe_version_major_minor = 'python%s.%s' % (
+            sys.version_info[0], sys.version_info[1])
+        py_exe_no_version = 'python'
+        required_symlinks = [ py_exe_no_version, py_exe_version_major,
+                         py_exe_version_major_minor ]
+
+        py_executable_base = os.path.basename(py_executable)
+
+        if py_executable_base in required_symlinks:
+            # Don't try to symlink to yourself.
+            required_symlinks.remove(py_executable_base)
+
+        for pth in required_symlinks:
+            full_pth = join(bin_dir, pth)
+            if os.path.exists(full_pth):
+                os.unlink(full_pth)
+            if symlink:
+                os.symlink(py_executable_base, full_pth)
+            else:
+                copyfile(py_executable, full_pth, symlink)
+
+    if is_win and ' ' in py_executable:
+        # There's a bug with subprocess on Windows when using a first
+        # argument that has a space in it.  Instead we have to quote
+        # the value:
+        py_executable = '"%s"' % py_executable
+    # NOTE: keep this check as one line, cmd.exe doesn't cope with line breaks
+    cmd = [py_executable, '-c', 'import sys;out=sys.stdout;'
+        'getattr(out, "buffer", out).write(sys.prefix.encode("utf-8"))']
+    logger.info('Testing executable with %s %s "%s"' % tuple(cmd))
+    try:
+        proc = subprocess.Popen(cmd,
+                            stdout=subprocess.PIPE)
+        proc_stdout, proc_stderr = proc.communicate()
+    except OSError:
+        e = sys.exc_info()[1]
+        if e.errno == errno.EACCES:
+            logger.fatal('ERROR: The executable %s could not be run: %s' % (py_executable, e))
+            sys.exit(100)
+        else:
+            raise e
+
+    proc_stdout = proc_stdout.strip().decode("utf-8")
+    proc_stdout = os.path.normcase(os.path.abspath(proc_stdout))
+    norm_home_dir = os.path.normcase(os.path.abspath(home_dir))
+    if hasattr(norm_home_dir, 'decode'):
+        norm_home_dir = norm_home_dir.decode(sys.getfilesystemencoding())
+    if proc_stdout != norm_home_dir:
+        logger.fatal(
+            'ERROR: The executable %s is not functioning' % py_executable)
+        logger.fatal(
+            'ERROR: It thinks sys.prefix is %r (should be %r)'
+            % (proc_stdout, norm_home_dir))
+        logger.fatal(
+            'ERROR: virtualenv is not compatible with this system or executable')
+        if is_win:
+            logger.fatal(
+                'Note: some Windows users have reported this error when they '
+                'installed Python for "Only this user" or have multiple '
+                'versions of Python installed. Copying the appropriate '
+                'PythonXX.dll to the virtualenv Scripts/ directory may fix '
+                'this problem.')
+        sys.exit(100)
+    else:
+        logger.info('Got sys.prefix result: %r' % proc_stdout)
+
+    pydistutils = os.path.expanduser('~/.pydistutils.cfg')
+    if os.path.exists(pydistutils):
+        logger.notify('Please make sure you remove any previous custom paths from '
+                      'your %s file.' % pydistutils)
+    ## FIXME: really this should be calculated earlier
+
+    fix_local_scheme(home_dir, symlink)
+
+    if site_packages:
+        if os.path.exists(site_packages_filename):
+            logger.info('Deleting %s' % site_packages_filename)
+            os.unlink(site_packages_filename)
+
+    return py_executable
+
+
+def install_activate(home_dir, bin_dir, prompt=None):
+    if is_win or is_jython and os._name == 'nt':
+        files = {
+            'activate.bat': ACTIVATE_BAT,
+            'deactivate.bat': DEACTIVATE_BAT,
+            'activate.ps1': ACTIVATE_PS,
+        }
+
+        # MSYS needs paths of the form /c/path/to/file
+        drive, tail = os.path.splitdrive(home_dir.replace(os.sep, '/'))
+        home_dir_msys = (drive and "/%s%s" or "%s%s") % (drive[:1], tail)
+
+        # Run-time conditional enables (basic) Cygwin compatibility
+        home_dir_sh = ("""$(if [ "$OSTYPE" "==" "cygwin" ]; then cygpath -u '%s'; else echo '%s'; fi;)""" %
+                       (home_dir, home_dir_msys))
+        files['activate'] = ACTIVATE_SH.replace('__VIRTUAL_ENV__', home_dir_sh)
+
+    else:
+        files = {'activate': ACTIVATE_SH}
+
+        # suppling activate.fish in addition to, not instead of, the
+        # bash script support.
+        files['activate.fish'] = ACTIVATE_FISH
+
+        # same for csh/tcsh support...
+        files['activate.csh'] = ACTIVATE_CSH
+
+    files['activate_this.py'] = ACTIVATE_THIS
+
+    install_files(home_dir, bin_dir, prompt, files)
+
+def install_files(home_dir, bin_dir, prompt, files):
+    if hasattr(home_dir, 'decode'):
+        home_dir = home_dir.decode(sys.getfilesystemencoding())
+    vname = os.path.basename(home_dir)
+    for name, content in files.items():
+        content = content.replace('__VIRTUAL_PROMPT__', prompt or '')
+        content = content.replace('__VIRTUAL_WINPROMPT__', prompt or '(%s)' % vname)
+        content = content.replace('__VIRTUAL_ENV__', home_dir)
+        content = content.replace('__VIRTUAL_NAME__', vname)
+        content = content.replace('__BIN_NAME__', os.path.basename(bin_dir))
+        writefile(os.path.join(bin_dir, name), content)
+
+def install_python_config(home_dir, bin_dir, prompt=None):
+    if sys.platform == 'win32' or is_jython and os._name == 'nt':
+        files = {}
+    else:
+        files = {'python-config': PYTHON_CONFIG}
+    install_files(home_dir, bin_dir, prompt, files)
+    for name, content in files.items():
+        make_exe(os.path.join(bin_dir, name))
+
+def install_distutils(home_dir):
+    distutils_path = change_prefix(distutils.__path__[0], home_dir)
+    mkdir(distutils_path)
+    ## FIXME: maybe this prefix setting should only be put in place if
+    ## there's a local distutils.cfg with a prefix setting?
+    home_dir = os.path.abspath(home_dir)
+    ## FIXME: this is breaking things, removing for now:
+    #distutils_cfg = DISTUTILS_CFG + "\n[install]\nprefix=%s\n" % home_dir
+    writefile(os.path.join(distutils_path, '__init__.py'), DISTUTILS_INIT)
+    writefile(os.path.join(distutils_path, 'distutils.cfg'), DISTUTILS_CFG, overwrite=False)
+
+def fix_local_scheme(home_dir, symlink=True):
+    """
+    Platforms that use the "posix_local" install scheme (like Ubuntu with
+    Python 2.7) need to be given an additional "local" location, sigh.
+    """
+    try:
+        import sysconfig
+    except ImportError:
+        pass
+    else:
+        if sysconfig._get_default_scheme() == 'posix_local':
+            local_path = os.path.join(home_dir, 'local')
+            if not os.path.exists(local_path):
+                os.mkdir(local_path)
+                for subdir_name in os.listdir(home_dir):
+                    if subdir_name == 'local':
+                        continue
+                    copyfile(os.path.abspath(os.path.join(home_dir, subdir_name)), \
+                                                            os.path.join(local_path, subdir_name), symlink)
+
+def fix_lib64(lib_dir, symlink=True):
+    """
+    Some platforms (particularly Gentoo on x64) put things in lib64/pythonX.Y
+    instead of lib/pythonX.Y.  If this is such a platform we'll just create a
+    symlink so lib64 points to lib
+    """
+    # PyPy's library path scheme is not affected by this.
+    # Return early or we will die on the following assert.
+    if is_pypy:
+        logger.debug('PyPy detected, skipping lib64 symlinking')
+        return
+    # Check we have a lib64 library path
+    if not [p for p in distutils.sysconfig.get_config_vars().values()
+            if isinstance(p, basestring) and 'lib64' in p]:
+        return
+
+    logger.debug('This system uses lib64; symlinking lib64 to lib')
+
+    assert os.path.basename(lib_dir) == 'python%s' % sys.version[:3], (
+        "Unexpected python lib dir: %r" % lib_dir)
+    lib_parent = os.path.dirname(lib_dir)
+    top_level = os.path.dirname(lib_parent)
+    lib_dir = os.path.join(top_level, 'lib')
+    lib64_link = os.path.join(top_level, 'lib64')
+    assert os.path.basename(lib_parent) == 'lib', (
+        "Unexpected parent dir: %r" % lib_parent)
+    if os.path.lexists(lib64_link):
+        return
+    if symlink:
+        os.symlink('lib', lib64_link)
+    else:
+        copyfile('lib', lib64_link)
+
+def resolve_interpreter(exe):
+    """
+    If the executable given isn't an absolute path, search $PATH for the interpreter
+    """
+    # If the "executable" is a version number, get the installed executable for
+    # that version
+    python_versions = get_installed_pythons()
+    if exe in python_versions:
+        exe = python_versions[exe]
+
+    if os.path.abspath(exe) != exe:
+        paths = os.environ.get('PATH', '').split(os.pathsep)
+        for path in paths:
+            if os.path.exists(join(path, exe)):
+                exe = join(path, exe)
+                break
+    if not os.path.exists(exe):
+        logger.fatal('The executable %s (from --python=%s) does not exist' % (exe, exe))
+        raise SystemExit(3)
+    if not is_executable(exe):
+        logger.fatal('The executable %s (from --python=%s) is not executable' % (exe, exe))
+        raise SystemExit(3)
+    return exe
+
+def is_executable(exe):
+    """Checks a file is executable"""
+    return os.access(exe, os.X_OK)
+
+############################################################
+## Relocating the environment:
+
+def make_environment_relocatable(home_dir):
+    """
+    Makes the already-existing environment use relative paths, and takes out
+    the #!-based environment selection in scripts.
+    """
+    home_dir, lib_dir, inc_dir, bin_dir = path_locations(home_dir)
+    activate_this = os.path.join(bin_dir, 'activate_this.py')
+    if not os.path.exists(activate_this):
+        logger.fatal(
+            'The environment doesn\'t have a file %s -- please re-run virtualenv '
+            'on this environment to update it' % activate_this)
+    fixup_scripts(home_dir, bin_dir)
+    fixup_pth_and_egg_link(home_dir)
+    ## FIXME: need to fix up distutils.cfg
+
+OK_ABS_SCRIPTS = ['python', 'python%s' % sys.version[:3],
+                  'activate', 'activate.bat', 'activate_this.py',
+                  'activate.fish', 'activate.csh']
+
+def fixup_scripts(home_dir, bin_dir):
+    if is_win:
+        new_shebang_args = (
+            '%s /c' % os.path.normcase(os.environ.get('COMSPEC', 'cmd.exe')),
+            '', '.exe')
+    else:
+        new_shebang_args = ('/usr/bin/env', sys.version[:3], '')
+
+    # This is what we expect at the top of scripts:
+    shebang = '#!%s' % os.path.normcase(os.path.join(
+        os.path.abspath(bin_dir), 'python%s' % new_shebang_args[2]))
+    # This is what we'll put:
+    new_shebang = '#!%s python%s%s' % new_shebang_args
+
+    for filename in os.listdir(bin_dir):
+        filename = os.path.join(bin_dir, filename)
+        if not os.path.isfile(filename):
+            # ignore subdirs, e.g. .svn ones.
+            continue
+        lines = None
+        with open(filename, 'rb') as f:
+            try:
+                lines = f.read().decode('utf-8').splitlines()
+            except UnicodeDecodeError:
+                # This is probably a binary program instead
+                # of a script, so just ignore it.
+                continue
+        if not lines:
+            logger.warn('Script %s is an empty file' % filename)
+            continue
+
+        old_shebang = lines[0].strip()
+        old_shebang = old_shebang[0:2] + os.path.normcase(old_shebang[2:])
+
+        if not old_shebang.startswith(shebang):
+            if os.path.basename(filename) in OK_ABS_SCRIPTS:
+                logger.debug('Cannot make script %s relative' % filename)
+            elif lines[0].strip() == new_shebang:
+                logger.info('Script %s has already been made relative' % filename)
+            else:
+                logger.warn('Script %s cannot be made relative (it\'s not a normal script that starts with %s)'
+                            % (filename, shebang))
+            continue
+        logger.notify('Making script %s relative' % filename)
+        script = relative_script([new_shebang] + lines[1:])
+        with open(filename, 'wb') as f:
+            f.write('\n'.join(script).encode('utf-8'))
+
+
+def relative_script(lines):
+    "Return a script that'll work in a relocatable environment."
+    activate = "import os; activate_this=os.path.join(os.path.dirname(os.path.realpath(__file__)), 'activate_this.py'); exec(compile(open(activate_this).read(), activate_this, 'exec'), dict(__file__=activate_this)); del os, activate_this"
+    # Find the last future statement in the script. If we insert the activation
+    # line before a future statement, Python will raise a SyntaxError.
+    activate_at = None
+    for idx, line in reversed(list(enumerate(lines))):
+        if line.split()[:3] == ['from', '__future__', 'import']:
+            activate_at = idx + 1
+            break
+    if activate_at is None:
+        # Activate after the shebang.
+        activate_at = 1
+    return lines[:activate_at] + ['', activate, ''] + lines[activate_at:]
+
+def fixup_pth_and_egg_link(home_dir, sys_path=None):
+    """Makes .pth and .egg-link files use relative paths"""
+    home_dir = os.path.normcase(os.path.abspath(home_dir))
+    if sys_path is None:
+        sys_path = sys.path
+    for path in sys_path:
+        if not path:
+            path = '.'
+        if not os.path.isdir(path):
+            continue
+        path = os.path.normcase(os.path.abspath(path))
+        if not path.startswith(home_dir):
+            logger.debug('Skipping system (non-environment) directory %s' % path)
+            continue
+        for filename in os.listdir(path):
+            filename = os.path.join(path, filename)
+            if filename.endswith('.pth'):
+                if not os.access(filename, os.W_OK):
+                    logger.warn('Cannot write .pth file %s, skipping' % filename)
+                else:
+                    fixup_pth_file(filename)
+            if filename.endswith('.egg-link'):
+                if not os.access(filename, os.W_OK):
+                    logger.warn('Cannot write .egg-link file %s, skipping' % filename)
+                else:
+                    fixup_egg_link(filename)
+
+def fixup_pth_file(filename):
+    lines = []
+    prev_lines = []
+    with open(filename) as f:
+        prev_lines = f.readlines()
+    for line in prev_lines:
+        line = line.strip()
+        if (not line or line.startswith('#') or line.startswith('import ')
+            or os.path.abspath(line) != line):
+            lines.append(line)
+        else:
+            new_value = make_relative_path(filename, line)
+            if line != new_value:
+                logger.debug('Rewriting path %s as %s (in %s)' % (line, new_value, filename))
+            lines.append(new_value)
+    if lines == prev_lines:
+        logger.info('No changes to .pth file %s' % filename)
+        return
+    logger.notify('Making paths in .pth file %s relative' % filename)
+    with open(filename, 'w') as f:
+        f.write('\n'.join(lines) + '\n')
+
+def fixup_egg_link(filename):
+    with open(filename) as f:
+        link = f.readline().strip()
+    if os.path.abspath(link) != link:
+        logger.debug('Link in %s already relative' % filename)
+        return
+    new_link = make_relative_path(filename, link)
+    logger.notify('Rewriting link %s in %s as %s' % (link, filename, new_link))
+    with open(filename, 'w') as f:
+        f.write(new_link)
+
+def make_relative_path(source, dest, dest_is_directory=True):
+    """
+    Make a filename relative, where the filename is dest, and it is
+    being referred to from the filename source.
+
+        >>> make_relative_path('/usr/share/something/a-file.pth',
+        ...                    '/usr/share/another-place/src/Directory')
+        '../another-place/src/Directory'
+        >>> make_relative_path('/usr/share/something/a-file.pth',
+        ...                    '/home/user/src/Directory')
+        '../../../home/user/src/Directory'
+        >>> make_relative_path('/usr/share/a-file.pth', '/usr/share/')
+        './'
+    """
+    source = os.path.dirname(source)
+    if not dest_is_directory:
+        dest_filename = os.path.basename(dest)
+        dest = os.path.dirname(dest)
+    dest = os.path.normpath(os.path.abspath(dest))
+    source = os.path.normpath(os.path.abspath(source))
+    dest_parts = dest.strip(os.path.sep).split(os.path.sep)
+    source_parts = source.strip(os.path.sep).split(os.path.sep)
+    while dest_parts and source_parts and dest_parts[0] == source_parts[0]:
+        dest_parts.pop(0)
+        source_parts.pop(0)
+    full_parts = ['..']*len(source_parts) + dest_parts
+    if not dest_is_directory:
+        full_parts.append(dest_filename)
+    if not full_parts:
+        # Special case for the current directory (otherwise it'd be '')
+        return './'
+    return os.path.sep.join(full_parts)
+
+
+
+############################################################
+## Bootstrap script creation:
+
+def create_bootstrap_script(extra_text, python_version=''):
+    """
+    Creates a bootstrap script, which is like this script but with
+    extend_parser, adjust_options, and after_install hooks.
+
+    This returns a string that (written to disk of course) can be used
+    as a bootstrap script with your own customizations.  The script
+    will be the standard virtualenv.py script, with your extra text
+    added (your extra text should be Python code).
+
+    If you include these functions, they will be called:
+
+    ``extend_parser(optparse_parser)``:
+        You can add or remove options from the parser here.
+
+    ``adjust_options(options, args)``:
+        You can change options here, or change the args (if you accept
+        different kinds of arguments, be sure you modify ``args`` so it is
+        only ``[DEST_DIR]``).
+
+    ``after_install(options, home_dir)``:
+
+        After everything is installed, this function is called.  This
+        is probably the function you are most likely to use.  An
+        example would be::
+
+            def after_install(options, home_dir):
+                subprocess.call([join(home_dir, 'bin', 'easy_install'),
+                                 'MyPackage'])
+                subprocess.call([join(home_dir, 'bin', 'my-package-script'),
+                                 'setup', home_dir])
+
+        This example immediately installs a package, and runs a setup
+        script from that package.
+
+    If you provide something like ``python_version='2.5'`` then the
+    script will start with ``#!/usr/bin/env python2.5`` instead of
+    ``#!/usr/bin/env python``.  You can use this when the script must
+    be run with a particular Python version.
+    """
+    filename = __file__
+    if filename.endswith('.pyc'):
+        filename = filename[:-1]
+    with codecs.open(filename, 'r', encoding='utf-8') as f:
+        content = f.read()
+    py_exe = 'python%s' % python_version
+    content = (('#!/usr/bin/env %s\n' % py_exe)
+               + '## WARNING: This file is generated\n'
+               + content)
+    return content.replace('##EXT' 'END##', extra_text)
+
+##EXTEND##
+
+def convert(s):
+    b = base64.b64decode(s.encode('ascii'))
+    return zlib.decompress(b).decode('utf-8')
+
+##file site.py
+SITE_PY = convert("""
+eJzFPf1z2zaWv/OvwMqToZTKdOJ0e3tO3RsncVrfuYm3yc7m1vXoKAmyWFMkS5C2tTd3f/u9DwAE
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+/Grb6lVvHSD7spj5iplBLRKZxxEYGdCbY9LWWC5hBB2voWno6DJUMzfkC3T8KJsWL9umDQY5szPt
+AVijEPwfucjncQ==
+""")
+
+##file activate.sh
+ACTIVATE_SH = convert("""
+eJytVd9v2kAMfs9fYQLq2m4MscdNVKMqEkgtVIQxbeuUHolpTgsXdHehpT/+9/mSEBJS2MOaB0ji
+z77P9menDpOAK5jzEGERKw0zhFihD/dcB2CrKJYewoyLFvM0XzGNNpzOZbSAGVPBqVWHdRSDx4SI
+NMhYANfgc4meDteW5ePGC45P4MkCumKhUENzDsu1H3lw1vJx1RJxGMKns6O2lWDqINGgotAHFCsu
+I7FAoWHFJGezEFWGqsEvaD5C42naHb93X+A3+elYCgVaxgh8DmQAys9HL2SS0mIaWBgm7mTN/O3G
+kzu6vHCng/HkW/fSve5O+hTOpnhfQAcoEry5jKVjNypoO0fgwzKSOgHm79KUK06Jfc7/RebHpD8a
+9kdXvT2UcnuFWG6p0stNB0mWUUQ1q3uiGRVEMfXHR03dTuQATPjwqIIPcB9wL4CArRAY/ZHJixYL
+Y9YBtcAoLQtFevOoI9QaHcEdMSAB0d08kuZhyUiSmav6CPCdVBnFOjNrLu6yMCWgKRA0TInBC5i4
+QwX3JG/mm581GKnSsSSxJTFHf9MAKr8w5T/vOv1mUurn5/zlT6fvTntjZzAaNl9rQ5JkU5KIc0GX
+inagwU57T2eddqWlTrvaS6d9sImZeUMkhWysveF0m37NcGub9Dpgi0j4qGiOzATjDr06OBjOYQOo
+7RBoGtNm9Denv1i0LVI7lxJDXLHSSBeWRflsyyqw7diuW3h0XdvK6lBMyaoMG1UyHdTsoYBuue75
+YOgOu1c91/2cwYpznPPeDoQpGL2xSm09NKp7BsvQ2hnT3aMs07lUnskpxewvBk73/LLnXo9HV9eT
+ijB3hWBO2ygoiWg/bKuZxqCCQq0DD3vkWIVvI2KosIw+vqW1gIItEG5KJb+xb09g65ktwYKgTc51
+uGJ/EFQs0ayEWLCQM5V9N4g+1+8UbXOJzF8bqhKtIqIwicWvzNFROZJlpfD8A7Vc044R0FxkcezG
+VzsV75usvTdYef+57v5n1b225qhXfwEmxHEs
+""")
+
+##file activate.fish
+ACTIVATE_FISH = convert("""
+eJyFVVFv0zAQfs+vONJO3RDNxCsSQoMVrdK2Vl03CSHkesllMXLsYDvZivjx2GmTOG0YfWhV+7u7
+73z33Y1gnTENKeMIeakNPCKUGhP7xcQTbCJ4ZOKcxoZV1GCUMp1t4O0zMxkTQEGVQjicO4dTyIwp
+Ppyfu386Q86jWOZwBhq1ZlK8jYIRXEoQ0jhDYAYSpjA2fBsFQVoKG0UKSLAJB9MEJrMXi6uYMiXl
+KCrIZYJARQIKTakEGAkmQ+tU5ZSDRTAlRY7CRJMA7GdkgRoNSJ74t1BRxegjR12jWAoGbfpTAeGY
+LK4vycN8tb6/uCbLi/VVWGPcx3maPr2AO4VjYB+HMAxAkQT/i/ptfbW4vVrczAZit3eHDNqL13n0
+Ya+w+Tq/uyLL1eJmuSaLh9lqNb/0+IzgznqnAjAvzBa4jG0BNmNXfdJUkxTU2I6xRaKcy+e6VApz
+WVmoTGFTgwslrYdN03ONrbbMN1E/FQ7H7gOP0UxRjV67TPRBjF3naCMV1mSkYk9MUN7F8cODZzsE
+iIHYviIe6n8WeGQxWKuhl+9Xa49uijq7fehXMRxT9VR9f/8jhDcfYSKkSOyxKp22cNIrIk+nzd2b
+Yc7FNpHx8FUn15ZfzXEE98JxZEohx4r6kosCT+R9ZkHQtLmXGYSEeH8JCTvYkcRgXAutp9Rw7Jmf
+E/J5fktuL25m1tMe3vLdjDt9bNxr2sMo2P3C9BccqGeYhqfQITz6XurXaqdf99LF1mT2YJrvzqCu
+5w7dKvV3PzNyOb+7+Hw923dOuB+AX2SxrZs9Lm0xbCH6kmhjUyuWw+7cC7DX8367H3VzDz6oBtty
+tMIeobE21JT6HaRS+TbaoqhbE7rgdGs3xtE4cOF3xo0TfxwsdyRlhUoxuzes18r+Jp88zDx1G+kd
+/HTrr1BY2CeuyfnbQtAcu9j+pOw6cy9X0k3IuoyKCZPC5ESf6MkgHE5tLiSW3Oa+W2NnrQfkGv/h
+7tR5PNFnMBlw4B9NJTxnzKA9fLTT0aXSb5vw7FUKzcTZPddqYHi2T9/axJmEEN3qHncVCuEPaFmq
+uEtpcBj2Z1wjrqGReJBHrY6/go21NA==
+""")
+
+##file activate.csh
+ACTIVATE_CSH = convert("""
+eJx1U2FP2zAQ/e5f8TAV3Soo+0zXbYUiDQkKQgVp2ibjJNfFUuIg22nVf885SVFLO3+I7Lt3fr6X
+d8eY58ZjYQpCWfuAhFB7yrAyIYf0Ve1SQmLsuU6DWepAw9TnEoOFq0rwdjAUx/hV1Ui1tVWAqy1M
+QGYcpaFYx+yVI67LkKwx1UuTEaYGl4X2Bl+zJpAlP/6V2hTDtCq/DYXQhdEeGW040Q/Eb+t9V/e3
+U/V88zh/mtyqh8n8J47G+IKTE3gKZJdoYrK3h5MRU1tGYS83gqNc+3yEgyyP93cP820evHLvr2H8
+kaYB/peoyY7aVHzpJnE9e+6I5Z+ji4GMTNJWNuOQq6MA1N25p8pW9HWdVWlfsNpPDbdxjgpaahuw
+1M7opCA/FFu1uwxC7L8KUqmto1KyQe3rx0I0Eovdf7BVe67U5c1MzSZ310pddGheZoFPWyytRkzU
+aCA/I+RkBXhFXr5aWV0SxjhUI6jwdAj8kmhPzX7nTfJFkM3MImp2VdVFFq1vLHSU5szYQK4Ri+Jd
+xlW2JBtOGcyYVW7SnB3v6RS91g3gKapZ0oWxbHVteYIIq3iv7QeuSrUj6KSqQ+yqsxDj1ivNQxKF
+YON10Q+NH/ARS95i5Tuqq2Vxfvc23f/FO6zrtXXmJr+ZtMY9/A15ZXFWtmch2rEQ4g1ryVHH
+""")
+
+##file activate.bat
+ACTIVATE_BAT = convert("""
+eJx9Ul9LhEAQfxf8DoOclI/dYyFkaCmcq4gZQTBUrincuZFbff12T133TM+nnd35/Zvxlr7XDFhV
+mUZHOVhFlOWP3g4DUriIWoVomYZpNBWUtGpaWgImO191pFkSpzlcmgaI70jVX7n2Qp8tuByg+46O
+CMHbMq64T+nmlJt082D1T44muCDk2prgEHF4mdI9RaS/QwSt3zSyIAaftRccvqVTBziD1x/WlPD5
+xd729NDBb8Nr4DU9QNMKsJeH9pkhPedhQsIkDuCDCa6A+NF9IevVFAohkqizdHetg/tkWvPoftWJ
+MCqnOxv7/x7Np6yv9P2Ker5dmX8yNyCkkWnbZy3N5LarczlqL8htx2EM9rQ/2H5BvIsIEi8OEG8U
++g8CsNTr
+""")
+
+##file deactivate.bat
+DEACTIVATE_BAT = convert("""
+eJyFkN0KgkAUhO8F32EQpHqFQEjQUPAPMaErqVxzId3IrV6/XST/UDx3c86c4WMO5FYysKJQFVVp
+CEfqxsnJ9DI7SA25i20fFqs3HO+GYLsDZ7h8GM3xfLHrg1QNvpSX4CWpQGvokZk4uqrQAjXjyElB
+a5IjCz0r+2dHcehHCe5MZNmB5R7TdqMqECMptHZh6DN/utb7Zs6Cej8OXYE5J04YOKFvD4GkHuJ0
+pilSd1jG6n87tDZ+BUwUOepI6CGSkFMYWf0ihvT33Qj1A+tCkSI=
+""")
+
+##file activate.ps1
+ACTIVATE_PS = convert("""
+eJylWdmO41hyfW+g/0FTU7C7IXeJIqmtB/3AnZRIStxF2kaBm7gv4ipyMF/mB3+Sf8GXVGVl1tLT
+43ECSqR4b5wbETeWE8z/+a///vNCDaN6cYtSf5G1dbNw/IVXNIu6aCvX9xa3qsgWl0IJ/7IYinbh
+2nkOVqs2X0TNjz/8eeFFle826fBhQRaLBkD9uviw+LCy3Sbq7Mb/UNbrH3+YNtLcVaB+Xbipb+eL
+tly0eVsD/M6u6g8//vC+dquobH5VWU75eMFUdvHb4n02RHlXuHYTFfmHbHCLLLNz70NpN+GrBI4p
+1EeSk4FAXaZR88u0vPip8usi7fznt3fvP+OuPnx49/Pil4td+XnzigIAPoqYQH2J8v4z+C+8b98m
+Q25t7k76LIK0cOz0V89/MXXx0+Lf6z5q3PA/F+/FIif9uqnaadFf/PzXSXYBfqIb2NeApecJwPzI
+dlL/149nnvyoc7KqYfzTAT8v/voUmX7e+3n364tffl/oVaDyswKY/7J18e6bve8Wv9RuUfqfLHmK
+/u139Hwx+9ePRep97KKqae30YwmCo2y+0vTz1k+rv7159B3pb1SOGj97Pe8/flfkC1Vn/7xYR4n6
+lypNEGDDV5f7lcjil3S+4++p881Wv6qKyn5GQg1yJwcp4BZ5E+Wt/z1P/umbiHir4J8Xip/eFt6n
+9T/9gU9eY+7zUX97Jlmb136ziKrKT/3OzpvP8VX/+MObSP0lL3LvVZlJ9v1b8357jXyw8rXxYPXN
+11n4UzJ8G8S/vUbuJ6RPj999DbtS5kys//JusXwrNLnvT99cFlBNwXCe+niRz8JF/ezNr9Pze+H6
+18W7d5PPvozW7+387Zto/v4pL8BvbxTzvIW9KCv/Fj0WzVQb/YXbVlPZWTz3/9vCaRtQbPN/Bb+j
+2rUrDxTVD68gfQXu/ZewAFX53U/vf/rD2P3558W7+W79Po1y/xXoX/6RFHyNIoVjgAG4H0RTcAe5
+3bSVv3DSwk2mZYHjFB8zj6fC4sLOFTHJJQrwzFYJgso0ApOoBzFiRzzQKjIQCCbQMIFJGCKqGUyS
+8AkjiF2wTwmMEbcEUvq8Nj+X0f4YcCQmYRiOY7eRbAJDqzm1chOoNstbJ8oTBhZQ2NcfgaB6QjLp
+U4+SWFjQGCZpyqby8V4JkPGs9eH1BscXIrTG24QxXLIgCLYNsIlxSYLA6SjAeg7HAg4/kpiIB8k9
+TCLm0EM4gKIxEj8IUj2dQeqSxEwYVH88qiRlCLjEYGuNIkJB1BA5dHOZdGAoUFk54WOqEojkuf4Q
+Ig3WY+96TDlKLicMC04h0+gDCdYHj0kz2xBDj9ECDU5zJ0tba6RKgXBneewhBG/xJ5m5FX+WSzsn
+wnHvKhcOciw9NunZ0BUF0n0IJAcJMdcLqgQb0zP19dl8t9PzmMBjkuIF7KkvHgqEovUPOsY0PBB1
+HCtUUhch83qEJPjQcNQDsgj0cRqx2ZbnnlrlUjE1EX2wFJyyDa/0GLrmKDEFepdWlsbmVU45Wiwt
+eFM6mfs4kxg8yc4YmKDy67dniLV5FUeO5AKNPZaOQQ++gh+dXE7dbJ1aTDr7S4WPd8sQoQkDyODg
+XnEu/voeKRAXZxB/e2xaJ4LTFLPYEJ15Ltb87I45l+P6OGFA5F5Ix8A4ORV6M1NH1uMuZMnmFtLi
+VpYed+gSq9JDBoHc05J4OhKetrk1p0LYiKipxLMe3tYS7c5V7O1KcPU8BJGdLfcswhoFCSGQqJ8f
+ThyQKy5EWFtHVuNhvTnkeTc8JMpN5li3buURh0+3ZGuzdwM55kon+8urbintjdQJf9U1D0ah+hNh
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+a7qPdJd31fPRC0TOgzupO7nLuBGr2A02yuUQwt2KQG31sW8Gd9tQiHq+hPDt4OzJuY4pS8XRsepY
+tsd7dVEfJFmc15IYqwHverrpWyS1rFZibDPW1hUUb+85CGUzSBSTK8hpvee/ZxonW51TUXekMy3L
+uy25tMTg4mqbSLQQJ+skiQu2toIfBFYrOWql+EQipgfT15P1aq6FDK3xgSjIGWde0BPftYchDTdM
+i4QdudHFkN0u6fSKiT09QLv2mtSblt5nNzBR6UReePNs+khE4rHcXuoK21igUKHl1c3MXMgPu7y8
+rKQDxR6N/rffXv+lROXet/9Q+l9I4D1U
+""")
+
+##file distutils-init.py
+DISTUTILS_INIT = convert("""
+eJytV1uL4zYUfvevOE0ottuMW9q3gVDa3aUMXXbLMlDKMBiNrSTqOJKRlMxkf33PkXyRbGe7Dw2E
+UXTu37lpxLFV2oIyifAncxmOL0xLIfcG+gv80x9VW6maw7o/CANSWWBwFtqeWMPlGY6qPjV8A0bB
+C4eKSTgZ5LRgFeyErMEeOBhbN+Ipgeizhjtnhkn7DdyjuNLPoCS0l/ayQTG0djwZC08cLXozeMss
+aG5EzQ0IScpnWtHSTXuxByV/QCmxE7y+eS0uxWeoheaVVfqSJHiU7Mhhi6gULbOHorshkrEnKxpT
+0n3A8Y8SMpuwZx6aoix3ouFlmW8gHRSkeSJ2g7hU+kiHLDaQw3bmRDaTGfTnty7gPm0FHbIBg9U9
+oh1kZzAFLaue2R6htPCtAda2nGlDSUJ4PZBgCJBGVcwKTAMz/vJiLD+Oin5Z5QlvDPdulC6EsiyE
+NFzb7McNTKJzbJqzphx92VKRFY1idenzmq3K0emRcbWBD0ryqc4NZGmKOOOX9Pz5x+/l27tP797c
+f/z0d+4NruGNai8uAM0bfsYaw8itFk8ny41jsfpyO+BWlpqfhcG4yxLdi/0tQqoT4a8Vby382mt8
+p7XSo7aWGdPBc+b6utaBmCQ7rQKQoWtAuthQCiold2KfJIPTT8xwg9blPumc+YDZC/wYGdAyHpJk
+vUbHbHWAp5No6pK/WhhLEWrFjUwtPEv1Agf8YmnsuXUQYkeZoHm8ogP16gt2uHoxcEMdf2C6pmbw
+hUMsWGhanboh4IzzmsIpWs134jVPqD/c74bZHdY69UKKSn/+KfVhxLgUlToemayLMYQOqfEC61bh
+cbhwaqoGUzIyZRFHPmau5juaWqwRn3mpWmoEA5nhzS5gog/5jbcFQqOZvmBasZtwYlG93k5GEiyw
+buHhMWLjDarEGpMGB2LFs5nIJkhp/nUmZneFaRth++lieJtHepIvKgx6PJqIlD9X2j6pG1i9x3pZ
+5bHuCPFiirGHeO7McvoXkz786GaKVzC9DSpnOxJdc4xm6NSVq7lNEnKdVlnpu9BNYoKX2Iq3wvgh
+gGEUM66kK6j4NiyoneuPLSwaCWDxczgaolEWpiMyDVDb7dNuLAbriL8ig8mmeju31oNvQdpnvEPC
+1vAXbWacGRVrGt/uXN/gU0CDDwgooKRrHfTBb1/s9lYZ8ZqOBU0yLvpuP6+K9hLFsvIjeNhBi0KL
+MlOuWRn3FRwx5oHXjl0YImUx0+gLzjGchrgzca026ETmYJzPD+IpuKzNi8AFn048Thd63OdD86M6
+84zE8yQm0VqXdbbgvub2pKVnS76icBGdeTHHXTKspUmr4NYo/furFLKiMdQzFjHJNcdAnMhltBJK
+0/IKX3DVFqvPJ2dLE7bDBkH0l/PJ29074+F0CsGYOxsb7U3myTUncYfXqnLLfa6sJybX4g+hmcjO
+kMRBfA1JellfRRKJcyRpxdS4rIl6FdmQCWjo/o9Qz7yKffoP4JHjOvABcRn4CZIT2RH4jnxmfpVG
+qgLaAvQBNfuO6X0/Ux02nb4FKx3vgP+XnkX0QW9pLy/NsXgdN24dD3LxO2Nwil7Zlc1dqtP3d7/h
+kzp1/+7hGBuY4pk0XD/0Ao/oTe/XGrfyM773aB7iUhgkpy+dwAMalxMP0DrBcsVw/6p25+/hobP9
+GBknrWExDhLJ1bwt1NcCNblaFbMKCyvmX0PeRaQ=
+""")
+
+##file distutils.cfg
+DISTUTILS_CFG = convert("""
+eJxNj00KwkAMhfc9xYNuxe4Ft57AjYiUtDO1wXSmNJnK3N5pdSEEAu8nH6lxHVlRhtDHMPATA4uH
+xJ4EFmGbvfJiicSHFRzUSISMY6hq3GLCRLnIvSTnEefN0FIjw5tF0Hkk9Q5dRunBsVoyFi24aaLg
+9FDOlL0FPGluf4QjcInLlxd6f6rqkgPu/5nHLg0cXCscXoozRrP51DRT3j9QNl99AP53T2Q=
+""")
+
+##file activate_this.py
+ACTIVATE_THIS = convert("""
+eJyNU01v2zAMvetXEB4K21jnDOstQA4dMGCHbeihlyEIDMWmE62yJEiKE//7kXKdpEWLzYBt8evx
+kRSzLPs6wiEoswM8YdMpjUXcq1Dz6RZa1cSiTkJdr86GsoTRHuCotBayiWqQEYGtMCgfD1KjGYBe
+5a3p0cRKiEe2NtLAFikftnDco0ko/SFEVgEZ8aRCZDIPY9xbA8pE9M4jfW/B2CjiHq9zbJVZuOQq
+siwTIvpxKYCembPAU4Muwi/Z4zfvrZ/MXipKeB8C+qisSZYiWfjJfs+0/MFMdWn1hJcO5U7G/SLa
+xVx8zU6VG/PXLXvfsyyzUqjeWR8hjGE+2iCE1W1tQ82hsCJN9dzKaoexyB/uH79TnjwvxcW0ntSb
+yZ8jq1Z5Q1UXsyy3gf9nbjTEj7NzQMfCJa/YSmrQ+2D/BqfiOi6sclrGzvoeVivIj8rcfcmnIQRF
+7XCyeZI7DFe5/lhlCs5PRf5QW66VXT/NrlQ46oD/D6InkOmi3IQcbhKxAX2g4a+Xd5s3UtCtG2py
+m8eg6WYWqR6SL5OjKMGfSrYt/6kxxQtOpeAgj1LXBNmpE2ElmCSIy5H0zFd8gJ924HWijWhb2hRC
+6wNEm1QdDZtuSZcEprIUBo/XRNcbQe1OUbQ/r3hPTaPJJDNtFLu8KHV5XoNr3Eo6h6YtOKw8e8yw
+VF5PnJ+ts3a9/Mz38RpG/AUSzYUW
+""")
+
+##file python-config
+PYTHON_CONFIG = convert("""
+eJyNVV1P2zAUfc+v8ODBiSABxlulTipbO6p1LWqBgVhlhcZpPYUkctzSivHfd6+dpGloGH2Ja/ue
+e+65Hz78xNhtf3x90xmw7vCWsRPGLvpDNuz87MKfdKMWSWxZ4ilNpCLZJiuWc66SVFUOZkkcirll
+rfxIBAzOMtImDzSVPBRrekwoX/OZu/0r4lm0DHiG60g86u8sjPw5rCyy86NRkB8QuuBRSqfAKESn
+3orLTCQxE3GYkC9tYp8fk89OSwNsmXgizrhUtnumeSgeo5GbLUMk49Rv+2nK48Cm/qMwfp333J2/
+dVcAGE0CIQHBsgIeEr4Wij0LtWDLzJ9ze5YEvH2WI6CHTAVcSu9ZCsXtgxu81CIvp6/k4eXsdfo7
+PvDCRD75yi41QitfzlcPp1OI7i/1/iQitqnr0iMgQ+A6wa+IKwwdxyk9IiXNAzgquTFU8NIxAVjM
+osm1Zz526e+shQ4hKRVci69nPC3Kw4NQEmkQ65E7OodxorSvxjvpBjQHDmWFIQ1mlmzlS5vedseT
+/mgIEsMJ7Lxz2bLAF9M5xeLEhdbHxpWOw0GdkJApMVBRF1y+a0z3c9WZPAXGFcFrJgCIB+024uad
+0CrzmEoRa3Ub4swNIHPGf7QDV+2uj2OiFWsChgCwjKqN6rp5izpbH6Wc1O1TclQTP/XVwi6anTr1
+1sbubjZLI1+VptPSdCfwnFBrB1jvebrTA9uUhU2/9gad7xPqeFkaQcnnLbCViZK8d7R1kxzFrIJV
+8EaLYmKYpvGVkig+3C5HCXbM1jGCGekiM2pRCVPyRyXYdPf6kcbWEQ36F5V4Gq9N7icNNw+JHwRE
+LTgxRXACpvnQv/PuT0xCCAywY/K4hE6Now2qDwaSE5FB+1agsoUveYDepS83qFcF1NufvULD3fTl
+g6Hgf7WBt6lzMeiyyWVn3P1WVbwaczHmTzE9A5SyItTVgFYyvs/L/fXlaNgbw8v3azT+0eikVlWD
+/vBHbzQumP23uBCjsYdrL9OWARwxs/nuLOzeXbPJTa/Xv6sUmQir5pC1YRLz3eA+CD8Z0XpcW8v9
+MZWF36ryyXXf3yBIz6nzqz8Muyz0m5Qj7OexfYo/Ph3LqvkHUg7AuA==
+""")
+
+MH_MAGIC = 0xfeedface
+MH_CIGAM = 0xcefaedfe
+MH_MAGIC_64 = 0xfeedfacf
+MH_CIGAM_64 = 0xcffaedfe
+FAT_MAGIC = 0xcafebabe
+BIG_ENDIAN = '>'
+LITTLE_ENDIAN = '<'
+LC_LOAD_DYLIB = 0xc
+maxint = majver == 3 and getattr(sys, 'maxsize') or getattr(sys, 'maxint')
+
+
+class fileview(object):
+    """
+    A proxy for file-like objects that exposes a given view of a file.
+    Modified from macholib.
+    """
+
+    def __init__(self, fileobj, start=0, size=maxint):
+        if isinstance(fileobj, fileview):
+            self._fileobj = fileobj._fileobj
+        else:
+            self._fileobj = fileobj
+        self._start = start
+        self._end = start + size
+        self._pos = 0
+
+    def __repr__(self):
+        return '<fileview [%d, %d] %r>' % (
+            self._start, self._end, self._fileobj)
+
+    def tell(self):
+        return self._pos
+
+    def _checkwindow(self, seekto, op):
+        if not (self._start <= seekto <= self._end):
+            raise IOError("%s to offset %d is outside window [%d, %d]" % (
+                op, seekto, self._start, self._end))
+
+    def seek(self, offset, whence=0):
+        seekto = offset
+        if whence == os.SEEK_SET:
+            seekto += self._start
+        elif whence == os.SEEK_CUR:
+            seekto += self._start + self._pos
+        elif whence == os.SEEK_END:
+            seekto += self._end
+        else:
+            raise IOError("Invalid whence argument to seek: %r" % (whence,))
+        self._checkwindow(seekto, 'seek')
+        self._fileobj.seek(seekto)
+        self._pos = seekto - self._start
+
+    def write(self, bytes):
+        here = self._start + self._pos
+        self._checkwindow(here, 'write')
+        self._checkwindow(here + len(bytes), 'write')
+        self._fileobj.seek(here, os.SEEK_SET)
+        self._fileobj.write(bytes)
+        self._pos += len(bytes)
+
+    def read(self, size=maxint):
+        assert size >= 0
+        here = self._start + self._pos
+        self._checkwindow(here, 'read')
+        size = min(size, self._end - here)
+        self._fileobj.seek(here, os.SEEK_SET)
+        bytes = self._fileobj.read(size)
+        self._pos += len(bytes)
+        return bytes
+
+
+def read_data(file, endian, num=1):
+    """
+    Read a given number of 32-bits unsigned integers from the given file
+    with the given endianness.
+    """
+    res = struct.unpack(endian + 'L' * num, file.read(num * 4))
+    if len(res) == 1:
+        return res[0]
+    return res
+
+
+def mach_o_change(path, what, value):
+    """
+    Replace a given name (what) in any LC_LOAD_DYLIB command found in
+    the given binary with a new name (value), provided it's shorter.
+    """
+
+    def do_macho(file, bits, endian):
+        # Read Mach-O header (the magic number is assumed read by the caller)
+        cputype, cpusubtype, filetype, ncmds, sizeofcmds, flags = read_data(file, endian, 6)
+        # 64-bits header has one more field.
+        if bits == 64:
+            read_data(file, endian)
+        # The header is followed by ncmds commands
+        for n in range(ncmds):
+            where = file.tell()
+            # Read command header
+            cmd, cmdsize = read_data(file, endian, 2)
+            if cmd == LC_LOAD_DYLIB:
+                # The first data field in LC_LOAD_DYLIB commands is the
+                # offset of the name, starting from the beginning of the
+                # command.
+                name_offset = read_data(file, endian)
+                file.seek(where + name_offset, os.SEEK_SET)
+                # Read the NUL terminated string
+                load = file.read(cmdsize - name_offset).decode()
+                load = load[:load.index('\0')]
+                # If the string is what is being replaced, overwrite it.
+                if load == what:
+                    file.seek(where + name_offset, os.SEEK_SET)
+                    file.write(value.encode() + '\0'.encode())
+            # Seek to the next command
+            file.seek(where + cmdsize, os.SEEK_SET)
+
+    def do_file(file, offset=0, size=maxint):
+        file = fileview(file, offset, size)
+        # Read magic number
+        magic = read_data(file, BIG_ENDIAN)
+        if magic == FAT_MAGIC:
+            # Fat binaries contain nfat_arch Mach-O binaries
+            nfat_arch = read_data(file, BIG_ENDIAN)
+            for n in range(nfat_arch):
+                # Read arch header
+                cputype, cpusubtype, offset, size, align = read_data(file, BIG_ENDIAN, 5)
+                do_file(file, offset, size)
+        elif magic == MH_MAGIC:
+            do_macho(file, 32, BIG_ENDIAN)
+        elif magic == MH_CIGAM:
+            do_macho(file, 32, LITTLE_ENDIAN)
+        elif magic == MH_MAGIC_64:
+            do_macho(file, 64, BIG_ENDIAN)
+        elif magic == MH_CIGAM_64:
+            do_macho(file, 64, LITTLE_ENDIAN)
+
+    assert(len(what) >= len(value))
+
+    with open(path, 'r+b') as f:
+        do_file(f)
+
+
+if __name__ == '__main__':
+    main()
+
+# TODO:
+# Copy python.exe.manifest
+# Monkeypatch distutils.sysconfig