text: """Append module search paths for third-party packages to sys.path.
  
  ****************************************************************
  * This module is automatically imported during initialization. *
  ****************************************************************
  
  This will append site-specific paths to the module search path.
  
  On Unix (including Mac OSX), it starts with sys.prefix and
  sys.exec_prefix (if different) and appends
  lib/python<version>/site-packages.
  
  On RISC OS it will use <PythonSite$Dir>.PythonXY.Site-Packages and
  <PythonUser$Dir.PythonXY.Site-Packages (if they exist).
  
  On other platforms (such as Windows), it tries each of the
  prefixes directly, as well as with lib/site-packages appended.  The
  resulting directories, if they exist, are appended to sys.path, and
  also inspected for path configuration files.
  
  If a file named "pyvenv.cfg" exists one directory above sys.executable,
  sys.prefix and sys.exec_prefix are set to that directory and
  it is also checked for site-packages (sys.base_prefix and
  sys.base_exec_prefix will always be the "real" prefixes of the Python
  installation). If "pyvenv.cfg" (a bootstrap configuration file) contains
  the key "include-system-site-packages" set to anything other than "false"
  (case-insensitive), the system-level prefixes will still also be
  searched for site-packages; otherwise they won't.
  
  All of the resulting site-specific directories, if they exist, are
  appended to sys.path, and also inspected for path configuration
  files.
  
  A path configuration file is a file whose name has the form
  <package>.pth; its contents are additional directories (one per line)
  to be added to sys.path.  Non-existing directories (or
  non-directories) are never added to sys.path; no directory is added to
  sys.path more than once.  Blank lines and lines beginning with
  '#' are skipped. Lines starting with 'import' are executed.
  
  For example, suppose sys.prefix and sys.exec_prefix are set to
  /usr/local and there is a directory /usr/local/lib/python2.5/site-packages
  with three subdirectories, foo, bar and spam, and two path
  configuration files, foo.pth and bar.pth.  Assume foo.pth contains the
  following:
  
    # foo package configuration
    foo
    bar
    bletch
  
  and bar.pth contains:
  
    # bar package configuration
    bar
  
  Then the following directories are added to sys.path, in this order:
  
    /usr/local/lib/python2.5/site-packages/bar
    /usr/local/lib/python2.5/site-packages/foo
  
  Note that bletch is omitted because it doesn't exist; bar precedes foo
  because bar.pth comes alphabetically before foo.pth; and spam is
  omitted because it is not mentioned in either path configuration file.
  
  The readline module is also automatically configured to enable
  completion for systems that support it.  This can be overridden in
  sitecustomize, usercustomize or PYTHONSTARTUP.  Starting Python in
  isolated mode (-I) disables automatic readline configuration.
  
  After these operations, an attempt is made to import a module
  named sitecustomize, which can perform arbitrary additional
  site-specific customizations.  If this import fails with an
  ImportError exception, it is silently ignored.
  """
  
  import sys
  import os
  import builtins
  import _sitebuiltins
  import io
  
  # Prefixes for site-packages; add additional prefixes like /usr/local here
  PREFIXES = [sys.prefix, sys.exec_prefix]
  # Enable per user site-packages directory
  # set it to False to disable the feature or True to force the feature
  ENABLE_USER_SITE = None
  
  # for distutils.commands.install
  # These values are initialized by the getuserbase() and getusersitepackages()
  # functions, through the main() function when Python starts.
  USER_SITE = None
  USER_BASE = None
  
  def makepath(*paths):
      dir = os.path.join(*paths)
      try:
          dir = os.path.abspath(dir)
      except OSError:
          pass
      return dir, os.path.normcase(dir)
  
  
  def abs_paths():
      """Set all module __file__ and __cached__ attributes to an absolute path"""
      for m in set(sys.modules.values()):
          if (getattr(getattr(m, '__loader__', None), '__module__', None) not in
                  ('_frozen_importlib', '_frozen_importlib_external')):
              continue   # don't mess with a PEP 302-supplied __file__
          try:
              m.__file__ = os.path.abspath(m.__file__)
          except (AttributeError, OSError, TypeError):
              pass
          try:
              m.__cached__ = os.path.abspath(m.__cached__)
          except (AttributeError, OSError, TypeError):
              pass
  
  
  def removeduppaths():
      """ Remove duplicate entries from sys.path along with making them
      absolute"""
      # This ensures that the initial path provided by the interpreter contains
      # only absolute pathnames, even if we're running from the build directory.
      L = []
      known_paths = set()
      for dir in sys.path:
          # Filter out duplicate paths (on case-insensitive file systems also
          # if they only differ in case); turn relative paths into absolute
          # paths.
          dir, dircase = makepath(dir)
          if dircase not in known_paths:
              L.append(dir)
              known_paths.add(dircase)
      sys.path[:] = L
      return known_paths
  
  
  def _init_pathinfo():
      """Return a set containing all existing file system items from sys.path."""
      d = set()
      for item in sys.path:
          try:
              if os.path.exists(item):
                  _, itemcase = makepath(item)
                  d.add(itemcase)
          except TypeError:
              continue
      return d
  
  
  def addpackage(sitedir, name, known_paths):
      """Process a .pth file within the site-packages directory:
         For each line in the file, either combine it with sitedir to a path
         and add that to known_paths, or execute it if it starts with 'import '.
      """
      if known_paths is None:
          known_paths = _init_pathinfo()
          reset = True
      else:
          reset = False
      fullname = os.path.join(sitedir, name)
      try:
          f = io.TextIOWrapper(io.open_code(fullname))
      except OSError:
          return
      with f:
          for n, line in enumerate(f):
              if line.startswith("#"):
                  continue
              try:
                  if line.startswith(("import ", "import\t")):
                      exec(line)
                      continue
                  line = line.rstrip()
                  dir, dircase = makepath(sitedir, line)
                  if not dircase in known_paths and os.path.exists(dir):
                      sys.path.append(dir)
                      known_paths.add(dircase)
              except Exception:
                  print("Error processing line {:d} of {}:\n".format(n+1, fullname),
                        file=sys.stderr)
                  import traceback
                  for record in traceback.format_exception(*sys.exc_info()):
                      for line in record.splitlines():
                          print('  '+line, file=sys.stderr)
                  print("\nRemainder of file ignored", file=sys.stderr)
                  break
      if reset:
          known_paths = None
      return known_paths
  
  
  def addsitedir(sitedir, known_paths=None):
      """Add 'sitedir' argument to sys.path if missing and handle .pth files in
      'sitedir'"""
      if known_paths is None:
          known_paths = _init_pathinfo()
          reset = True
      else:
          reset = False
      sitedir, sitedircase = makepath(sitedir)
      if not sitedircase in known_paths:
          sys.path.append(sitedir)        # Add path component
          known_paths.add(sitedircase)
      try:
          names = os.listdir(sitedir)
      except OSError:
          return
      names = [name for name in names if name.endswith(os.extsep+"pth")]
      for name in sorted(names):
          addpackage(sitedir, name, known_paths)
      if reset:
          known_paths = None
      return known_paths
  
  
  def check_enableusersite():
      """Check if user site directory is safe for inclusion
  
      The function tests for the command line flag (including environment var),
      process uid/gid equal to effective uid/gid.
  
      None: Disabled for security reasons
      False: Disabled by user (command line option)
      True: Safe and enabled
      """
      if sys.flags.no_user_site:
          return False
  
      if os.name == 'riscos':
          return 'PythonUser$Dir' in os.environ
  
      if hasattr(os, "getuid") and hasattr(os, "geteuid"):
          # check process uid == effective uid
          if os.geteuid() != os.getuid():
              return None
      if hasattr(os, "getgid") and hasattr(os, "getegid"):
          # check process gid == effective gid
          if os.getegid() != os.getgid():
              return None
  
      return True
  
  
  # NOTE: sysconfig and it's dependencies are relatively large but site module
  # needs very limited part of them.
  # To speedup startup time, we have copy of them.
  #
  # See https://bugs.python.org/issue29585
  
  # Copy of sysconfig._getuserbase()
  def _getuserbase():
      env_base = os.environ.get("PYTHONUSERBASE", None)
      if env_base:
          return env_base
  
      def joinuser(*args):
          return os.path.expanduser(os.path.join(*args))
  
      if os.name == "nt":
          base = os.environ.get("APPDATA") or "~"
          return joinuser(base, "Python")
  
      if sys.platform == "darwin" and sys._framework:
          return joinuser("~", "Library", sys._framework,
                          "%d.%d" % sys.version_info[:2])
  
      if os.name == "riscos":
          return os.path.canonicalise("<PythonUser$Dir>")
  
      return joinuser("~", ".local")
  
  
  # Same to sysconfig.get_path('purelib', os.name+'_user')
  def _get_path(userbase):
      version = sys.version_info
  
      if os.name == 'nt':
          return f'{userbase}\\Python{version[0]}{version[1]}\\site-packages'
  
      if sys.platform == 'darwin' and sys._framework:
          return f'{userbase}/lib/python/site-packages'
  
      return f'{userbase}/lib/python{version[0]}.{version[1]}/site-packages'
  
  
  def getuserbase():
      """Returns the `user base` directory path.
  
      The `user base` directory can be used to store data. If the global
      variable ``USER_BASE`` is not initialized yet, this function will also set
      it.
      """
      global USER_BASE
      if USER_BASE is None:
          USER_BASE = _getuserbase()
      return USER_BASE
  
  
  def getusersitepackages():
      """Returns the user-specific site-packages directory path.
  
      If the global variable ``USER_SITE`` is not initialized yet, this
      function will also set it.
      """
      global USER_SITE
      if os.name == 'riscos' and USER_SITE is None:
          try:
              USER_SITE = os.path.canonicalise(
                  "<PythonUser$Dir>.Python%d%d.Site-Packages" %
                  sys.version_info[:2])
          except:
              pass
  
      userbase = getuserbase() # this will also set USER_BASE
  
      if USER_SITE is None:
          USER_SITE = _get_path(userbase)
  
      return USER_SITE
  
  def addusersitepackages(known_paths):
      """Add a per user site-package to sys.path
  
      Each user has its own python directory with site-packages in the
      home directory.
      """
      # get the per user site-package path
      # this call will also make sure USER_BASE and USER_SITE are set
      user_site = getusersitepackages()
  
      if ENABLE_USER_SITE and os.path.isdir(user_site):
          addsitedir(user_site, known_paths)
      return known_paths
  
  def getsitepackages(prefixes=None):
      """Returns a list containing all global site-packages directories.
  
      For each directory present in ``prefixes`` (or the global ``PREFIXES``),
      this function will find its `site-packages` subdirectory depending on the
      system environment, and will return a list of full paths.
      """
      sitepackages = []
      seen = set()
  
      if os.name == 'riscos':
          try:
              sitepackages.append(os.path.canonicalise(
                  "<PythonSite$Dir>.Python%d%d.Site-Packages" % \
                  sys.version_info[:2]))
          except:
              pass
          return sitepackages
  
      if prefixes is None:
          prefixes = PREFIXES
  
      for prefix in prefixes:
          if not prefix or prefix in seen:
              continue
          seen.add(prefix)
  
          if os.sep == '/':
              sitepackages.append(os.path.join(prefix, "lib",
                                          "python%d.%d" % sys.version_info[:2],
                                          "site-packages"))
          else:
              sitepackages.append(prefix)
              sitepackages.append(os.path.join(prefix, "lib", "site-packages"))
      return sitepackages
  
  def addsitepackages(known_paths, prefixes=None):
      """Add site-packages to sys.path"""
      for sitedir in getsitepackages(prefixes):
          if os.path.isdir(sitedir):
              addsitedir(sitedir, known_paths)
  
      return known_paths
  
  def setquit():
      """Define new builtins 'quit' and 'exit'.
  
      These are objects which make the interpreter exit when called.
      The repr of each object contains a hint at how it works.
  
      """
      if os.sep == '\\':
          eof = 'Ctrl-Z plus Return'
      else:
          eof = 'Ctrl-D (i.e. EOF)'
  
      builtins.quit = _sitebuiltins.Quitter('quit', eof)
      builtins.exit = _sitebuiltins.Quitter('exit', eof)
  
  
  def setcopyright():
      """Set 'copyright' and 'credits' in builtins"""
      builtins.copyright = _sitebuiltins._Printer("copyright", sys.copyright)
      if sys.platform[:4] == 'java':
          builtins.credits = _sitebuiltins._Printer(
              "credits",
              "Jython is maintained by the Jython developers (www.jython.org).")
      else:
          builtins.credits = _sitebuiltins._Printer("credits", """\
      Thanks to CWI, CNRI, BeOpen.com, Zope Corporation and a cast of thousands
      for supporting Python development.  See www.python.org for more information.""")
      files, dirs = [], []
      # Not all modules are required to have a __file__ attribute.  See
      # PEP 420 for more details.
      if hasattr(os, '__file__'):
          here = os.path.dirname(os.__file__)
          files.extend(["LICENSE"+os.extsep+"txt", "LICENSE"])
          dirs.extend([os.path.join(here, os.pardir), here, os.curdir])
      builtins.license = _sitebuiltins._Printer(
          "license",
          "See https://www.python.org/psf/license/",
          files, dirs)
  
  
  def sethelper():
      builtins.help = _sitebuiltins._Helper()
  
  def enablerlcompleter():
      """Enable default readline configuration on interactive prompts, by
      registering a sys.__interactivehook__.
  
      If the readline module can be imported, the hook will set the Tab key
      as completion key and register ~/.python_history as history file.
      This can be overridden in the sitecustomize or usercustomize module,
      or in a PYTHONSTARTUP file.
      """
      def register_readline():
          import atexit
          try:
              import readline
              import rlcompleter
          except ImportError:
              return
  
          # Reading the initialization (config) file may not be enough to set a
          # completion key, so we set one first and then read the file.
          readline_doc = getattr(readline, '__doc__', '')
          if readline_doc is not None and 'libedit' in readline_doc:
              readline.parse_and_bind('bind ^I rl_complete')
          else:
              readline.parse_and_bind('tab: complete')
  
          try:
              readline.read_init_file()
          except OSError:
              # An OSError here could have many causes, but the most likely one
              # is that there's no .inputrc file (or .editrc file in the case of
              # Mac OS X + libedit) in the expected location.  In that case, we
              # want to ignore the exception.
              pass
  
          if readline.get_current_history_length() == 0:
              # If no history was loaded, default to .python_history.
              # The guard is necessary to avoid doubling history size at
              # each interpreter exit when readline was already configured
              # through a PYTHONSTARTUP hook, see:
              # http://bugs.python.org/issue5845#msg198636
              history = os.path.join(os.path.expanduser('~'),
                                     '.python_history')
              try:
                  readline.read_history_file(history)
              except OSError:
                  pass
  
              def write_history():
                  try:
                      readline.write_history_file(history)
                  except OSError:
                      # bpo-19891, bpo-41193: Home directory does not exist
                      # or is not writable, or the filesystem is read-only.
                      pass
  
              atexit.register(write_history)
  
      sys.__interactivehook__ = register_readline
  
  def venv(known_paths):
      global PREFIXES, ENABLE_USER_SITE
  
      env = os.environ
      if sys.platform == 'darwin' and '__PYVENV_LAUNCHER__' in env:
          executable = sys._base_executable = os.environ['__PYVENV_LAUNCHER__']
      else:
          executable = sys.executable
      exe_dir, _ = os.path.split(os.path.abspath(executable))
      site_prefix = os.path.dirname(exe_dir)
      sys._home = None
      conf_basename = 'pyvenv.cfg'
      candidate_confs = [
          conffile for conffile in (
              os.path.join(exe_dir, conf_basename),
              os.path.join(site_prefix, conf_basename)
              )
          if os.path.isfile(conffile)
          ]
  
      if candidate_confs:
          virtual_conf = candidate_confs[0]
          system_site = "true"
          # Issue 25185: Use UTF-8, as that's what the venv module uses when
          # writing the file.
          with open(virtual_conf, encoding='utf-8') as f:
              for line in f:
                  if '=' in line:
                      key, _, value = line.partition('=')
                      key = key.strip().lower()
                      value = value.strip()
                      if key == 'include-system-site-packages':
                          system_site = value.lower()
                      elif key == 'home':
                          sys._home = value
  
          sys.prefix = sys.exec_prefix = site_prefix
  
          # Doing this here ensures venv takes precedence over user-site
          addsitepackages(known_paths, [sys.prefix])
  
          # addsitepackages will process site_prefix again if its in PREFIXES,
          # but that's ok; known_paths will prevent anything being added twice
          if system_site == "true":
              PREFIXES.insert(0, sys.prefix)
          else:
              PREFIXES = [sys.prefix]
              ENABLE_USER_SITE = False
  
      return known_paths
  
  
  def execsitecustomize():
      """Run custom site specific code, if available."""
      try:
          try:
              import sitecustomize
          except ImportError as exc:
              if exc.name == 'sitecustomize':
                  pass
              else:
                  raise
      except Exception as err:
          if sys.flags.verbose:
              sys.excepthook(*sys.exc_info())
          else:
              sys.stderr.write(
                  "Error in sitecustomize; set PYTHONVERBOSE for traceback:\n"
                  "%s: %s\n" %
                  (err.__class__.__name__, err))
  
  
  def execusercustomize():
      """Run custom user specific code, if available."""
      try:
          try:
              import usercustomize
          except ImportError as exc:
              if exc.name == 'usercustomize':
                  pass
              else:
                  raise
      except Exception as err:
          if sys.flags.verbose:
              sys.excepthook(*sys.exc_info())
          else:
              sys.stderr.write(
                  "Error in usercustomize; set PYTHONVERBOSE for traceback:\n"
                  "%s: %s\n" %
                  (err.__class__.__name__, err))
  
  
  def main():
      """Add standard site-specific directories to the module search path.
  
      This function is called automatically when this module is imported,
      unless the python interpreter was started with the -S flag.
      """
      global ENABLE_USER_SITE
  
      orig_path = sys.path[:]
      known_paths = removeduppaths()
      if orig_path != sys.path:
          # removeduppaths() might make sys.path absolute.
          # fix __file__ and __cached__ of already imported modules too.
          abs_paths()
  
      known_paths = venv(known_paths)
      if ENABLE_USER_SITE is None:
          ENABLE_USER_SITE = check_enableusersite()
      known_paths = addusersitepackages(known_paths)
      known_paths = addsitepackages(known_paths)
      setquit()
      setcopyright()
      sethelper()
      if not sys.flags.isolated:
          enablerlcompleter()
      execsitecustomize()
      if ENABLE_USER_SITE:
          execusercustomize()
  
  # Prevent extending of sys.path when python was started with -S and
  # site is imported later.
  if not sys.flags.no_site:
      main()
  
  def _script():
      help = """\
      %s [--user-base] [--user-site]
  
      Without arguments print some useful information
      With arguments print the value of USER_BASE and/or USER_SITE separated
      by '%s'.
  
      Exit codes with --user-base or --user-site:
        0 - user site directory is enabled
        1 - user site directory is disabled by user
        2 - uses site directory is disabled by super user
            or for security reasons
       >2 - unknown error
      """
      args = sys.argv[1:]
      if not args:
          user_base = getuserbase()
          user_site = getusersitepackages()
          print("sys.path = [")
          for dir in sys.path:
              print("    %r," % (dir,))
          print("]")
          print("USER_BASE: %r (%s)" % (user_base,
              "exists" if os.path.isdir(user_base) else "doesn't exist"))
          print("USER_SITE: %r (%s)" % (user_site,
              "exists" if os.path.isdir(user_site) else "doesn't exist"))
          print("ENABLE_USER_SITE: %r" %  ENABLE_USER_SITE)
          sys.exit(0)
  
      buffer = []
      if '--user-base' in args:
          buffer.append(USER_BASE)
      if '--user-site' in args:
          buffer.append(USER_SITE)
  
      if buffer:
          print(os.pathsep.join(buffer))
          if ENABLE_USER_SITE:
              sys.exit(0)
          elif ENABLE_USER_SITE is False:
              sys.exit(1)
          elif ENABLE_USER_SITE is None:
              sys.exit(2)
          else:
              sys.exit(3)
      else:
          import textwrap
          print(textwrap.dedent(help % (sys.argv[0], os.pathsep)))
          sys.exit(10)
  
  if __name__ == '__main__':
      _script()
  