text: """Append module search paths for third-party packages to sys.path.
  
  ****************************************************************
  * This module is automatically imported during initialization. *
  ****************************************************************
  
  In earlier versions of Python (up to 1.5a3), scripts or modules that
  needed to use site-specific modules would place ``import site''
  somewhere near the top of their code.  Because of the automatic
  import, this is no longer necessary (but code that does it still
  works).
  
  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 as well as lib/site-python.
  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.
  
  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.
  
  After these path manipulations, 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 __builtin__
  import traceback
  
  # 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__file__():
      """Set all module' __file__ attribute to an absolute path"""
      for m in sys.modules.values():
          if hasattr(m, '__loader__'):
              continue   # don't mess with a PEP 302-supplied __file__
          try:
              m.__file__ = os.path.abspath(m.__file__)
          except (AttributeError, OSError):
              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 not dircase 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 directory entries from sys.path"""
      d = set()
      for dir in sys.path:
          try:
              if os.path.isdir(dir):
                  dir, dircase = makepath(dir)
                  d.add(dircase)
          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:
          _init_pathinfo()
          reset = 1
      else:
          reset = 0
      fullname = os.path.join(sitedir, name)
      try:
          f = open(fullname, "rU")
      except IOError:
          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 as err:
                  print >>sys.stderr, "Error processing line {:d} of {}:\n".format(
                      n+1, fullname)
                  for record in traceback.format_exception(*sys.exc_info()):
                      for line in record.splitlines():
                          print >>sys.stderr, '  '+line
                  print >>sys.stderr, "\nRemainder of file ignored"
                  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 = 1
      else:
          reset = 0
      sitedir, sitedircase = makepath(sitedir)
      if not sitedircase in known_paths:
          sys.path.append(sitedir)        # Add path component
      try:
          names = os.listdir(sitedir)
      except os.error:
          return
      dotpth = os.extsep + "pth"
      names = [name for name in names if name.endswith(dotpth)]
      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 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
  
  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 not None:
          return USER_BASE
      from sysconfig import get_config_var
      USER_BASE = get_config_var('userbase')
      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
      user_base = getuserbase() # this will also set USER_BASE
  
      if USER_SITE is not None:
          return USER_SITE
  
      from sysconfig import get_path
      import os
  
      if sys.platform == 'darwin':
          from sysconfig import get_config_var
          if get_config_var('PYTHONFRAMEWORK'):
              USER_SITE = get_path('purelib', 'osx_framework_user')
              return USER_SITE
  
      USER_SITE = get_path('purelib', '%s_user' % os.name)
      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():
      """Returns a list containing all global site-packages directories
      (and possibly site-python).
  
      For each directory present in 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()
  
      for prefix in PREFIXES:
          if not prefix or prefix in seen:
              continue
          seen.add(prefix)
  
          if sys.platform in ('os2emx', 'riscos'):
              sitepackages.append(os.path.join(prefix, "Lib", "site-packages"))
          elif os.sep == '/':
              sitepackages.append(os.path.join(prefix, "lib",
                                          "python" + sys.version[:3],
                                          "site-packages"))
              sitepackages.append(os.path.join(prefix, "lib", "site-python"))
          else:
              sitepackages.append(prefix)
              sitepackages.append(os.path.join(prefix, "lib", "site-packages"))
          if sys.platform == "darwin":
              # for framework builds *only* we add the standard Apple
              # locations.
              from sysconfig import get_config_var
              framework = get_config_var("PYTHONFRAMEWORK")
              if framework:
                  sitepackages.append(
                          os.path.join("/Library", framework,
                              sys.version[:3], "site-packages"))
      return sitepackages
  
  def addsitepackages(known_paths):
      """Add site-packages (and possibly site-python) to sys.path"""
      for sitedir in getsitepackages():
          if os.path.isdir(sitedir):
              addsitedir(sitedir, known_paths)
  
      return known_paths
  
  def setBEGINLIBPATH():
      """The OS/2 EMX port has optional extension modules that do double duty
      as DLLs (and must use the .DLL file extension) for other extensions.
      The library search path needs to be amended so these will be found
      during module import.  Use BEGINLIBPATH so that these are at the start
      of the library search path.
  
      """
      dllpath = os.path.join(sys.prefix, "Lib", "lib-dynload")
      libpath = os.environ['BEGINLIBPATH'].split(';')
      if libpath[-1]:
          libpath.append(dllpath)
      else:
          libpath[-1] = dllpath
      os.environ['BEGINLIBPATH'] = ';'.join(libpath)
  
  
  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 = 'Cmd-Q'
      elif os.sep == '\\':
          eof = 'Ctrl-Z plus Return'
      else:
          eof = 'Ctrl-D (i.e. EOF)'
  
      class Quitter(object):
          def __init__(self, name):
              self.name = name
          def __repr__(self):
              return 'Use %s() or %s to exit' % (self.name, eof)
          def __call__(self, code=None):
              # Shells like IDLE catch the SystemExit, but listen when their
              # stdin wrapper is closed.
              try:
                  sys.stdin.close()
              except:
                  pass
              raise SystemExit(code)
      __builtin__.quit = Quitter('quit')
      __builtin__.exit = Quitter('exit')
  
  
  class _Printer(object):
      """interactive prompt objects for printing the license text, a list of
      contributors and the copyright notice."""
  
      MAXLINES = 23
  
      def __init__(self, name, data, files=(), dirs=()):
          self.__name = name
          self.__data = data
          self.__files = files
          self.__dirs = dirs
          self.__lines = None
  
      def __setup(self):
          if self.__lines:
              return
          data = None
          for dir in self.__dirs:
              for filename in self.__files:
                  filename = os.path.join(dir, filename)
                  try:
                      fp = file(filename, "rU")
                      data = fp.read()
                      fp.close()
                      break
                  except IOError:
                      pass
              if data:
                  break
          if not data:
              data = self.__data
          self.__lines = data.split('\n')
          self.__linecnt = len(self.__lines)
  
      def __repr__(self):
          self.__setup()
          if len(self.__lines) <= self.MAXLINES:
              return "\n".join(self.__lines)
          else:
              return "Type %s() to see the full %s text" % ((self.__name,)*2)
  
      def __call__(self):
          self.__setup()
          prompt = 'Hit Return for more, or q (and Return) to quit: '
          lineno = 0
          while 1:
              try:
                  for i in range(lineno, lineno + self.MAXLINES):
                      print self.__lines[i]
              except IndexError:
                  break
              else:
                  lineno += self.MAXLINES
                  key = None
                  while key is None:
                      key = raw_input(prompt)
                      if key not in ('', 'q'):
                          key = None
                  if key == 'q':
                      break
  
  def setcopyright():
      """Set 'copyright' and 'credits' in __builtin__"""
      __builtin__.copyright = _Printer("copyright", sys.copyright)
      if sys.platform[:4] == 'java':
          __builtin__.credits = _Printer(
              "credits",
              "Jython is maintained by the Jython developers (www.jython.org).")
      else:
          __builtin__.credits = _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.""")
      here = os.path.dirname(os.__file__)
      __builtin__.license = _Printer(
          "license", "See http://www.python.org/psf/license/",
          ["LICENSE.txt", "LICENSE"],
          [os.path.join(here, os.pardir), here, os.curdir])
  
  
  class _Helper(object):
      """Define the builtin 'help'.
      This is a wrapper around pydoc.help (with a twist).
  
      """
  
      def __repr__(self):
          return "Type help() for interactive help, " \
                 "or help(object) for help about object."
      def __call__(self, *args, **kwds):
          import pydoc
          return pydoc.help(*args, **kwds)
  
  def sethelper():
      __builtin__.help = _Helper()
  
  def aliasmbcs():
      """On Windows, some default encodings are not provided by Python,
      while they are always available as "mbcs" in each locale. Make
      them usable by aliasing to "mbcs" in such a case."""
      if sys.platform == 'win32':
          import locale, codecs
          enc = locale.getdefaultlocale()[1]
          if enc.startswith('cp'):            # "cp***" ?
              try:
                  codecs.lookup(enc)
              except LookupError:
                  import encodings
                  encodings._cache[enc] = encodings._unknown
                  encodings.aliases.aliases[enc] = 'mbcs'
  
  def setencoding():
      """Set the string encoding used by the Unicode implementation.  The
      default is 'ascii', but if you're willing to experiment, you can
      change this."""
      encoding = "ascii" # Default value set by _PyUnicode_Init()
      if 0:
          # Enable to support locale aware default string encodings.
          import locale
          loc = locale.getdefaultlocale()
          if loc[1]:
              encoding = loc[1]
      if 0:
          # Enable to switch off string to Unicode coercion and implicit
          # Unicode to string conversion.
          encoding = "undefined"
      if encoding != "ascii":
          # On Non-Unicode builds this will raise an AttributeError...
          sys.setdefaultencoding(encoding) # Needs Python Unicode build !
  
  
  def execsitecustomize():
      """Run custom site specific code, if available."""
      try:
          import sitecustomize
      except ImportError:
          pass
      except Exception:
          if sys.flags.verbose:
              sys.excepthook(*sys.exc_info())
          else:
              print >>sys.stderr, \
                  "'import sitecustomize' failed; use -v for traceback"
  
  
  def execusercustomize():
      """Run custom user specific code, if available."""
      try:
          import usercustomize
      except ImportError:
          pass
      except Exception:
          if sys.flags.verbose:
              sys.excepthook(*sys.exc_info())
          else:
              print>>sys.stderr, \
                  "'import usercustomize' failed; use -v for traceback"
  
  
  def main():
      global ENABLE_USER_SITE
  
      abs__file__()
      known_paths = removeduppaths()
      if ENABLE_USER_SITE is None:
          ENABLE_USER_SITE = check_enableusersite()
      known_paths = addusersitepackages(known_paths)
      known_paths = addsitepackages(known_paths)
      if sys.platform == 'os2emx':
          setBEGINLIBPATH()
      setquit()
      setcopyright()
      sethelper()
      aliasmbcs()
      setencoding()
      execsitecustomize()
      if ENABLE_USER_SITE:
          execusercustomize()
      # Remove sys.setdefaultencoding() so that users cannot change the
      # encoding after initialization.  The test for presence is needed when
      # this module is run as a script, because this code is executed twice.
      if hasattr(sys, "setdefaultencoding"):
          del sys.setdefaultencoding
  
  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:
          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()
  