text: """Locations where we look for configs, install stuff, etc"""
  
  import sys
  import site
  import os
  import shutil
  import tempfile
  from pip.backwardcompat import get_python_lib
  
  
  def running_under_virtualenv():
      """
      Return True if we're running inside a virtualenv, False otherwise.
  
      """
      return hasattr(sys, 'real_prefix')
  
  
  def virtualenv_no_global():
      """
      Return True if in a venv and no system site packages.
      """
      #this mirrors the logic in virtualenv.py for locating the no-global-site-packages.txt file
      site_mod_dir = os.path.dirname(os.path.abspath(site.__file__))
      no_global_file = os.path.join(site_mod_dir, 'no-global-site-packages.txt')
      if running_under_virtualenv() and os.path.isfile(no_global_file):
          return True
  
  
  if running_under_virtualenv():
      build_prefix = os.path.join(sys.prefix, 'build')
      src_prefix = os.path.join(sys.prefix, 'src')
  else:
      # Use tempfile to create a temporary folder for build
      # Note: we are NOT using mkdtemp so we can have a consistent build dir
      build_prefix = os.path.join(tempfile.gettempdir(), 'pip-build')
  
      ## FIXME: keep src in cwd for now (it is not a temporary folder)
      try:
          src_prefix = os.path.join(os.getcwd(), 'src')
      except OSError:
          # In case the current working directory has been renamed or deleted
          sys.exit("The folder you are executing pip from can no longer be found.")
  
  # under Mac OS X + virtualenv sys.prefix is not properly resolved
  # it is something like /path/to/python/bin/..
  build_prefix = os.path.abspath(build_prefix)
  src_prefix = os.path.abspath(src_prefix)
  
  # FIXME doesn't account for venv linked to global site-packages
  
  site_packages = get_python_lib()
  user_dir = os.path.expanduser('~')
  if sys.platform == 'win32':
      bin_py = os.path.join(sys.prefix, 'Scripts')
      # buildout uses 'bin' on Windows too?
      if not os.path.exists(bin_py):
          bin_py = os.path.join(sys.prefix, 'bin')
      default_storage_dir = os.path.join(user_dir, 'pip')
      default_config_file = os.path.join(default_storage_dir, 'pip.ini')
      default_log_file = os.path.join(default_storage_dir, 'pip.log')
  else:
      bin_py = os.path.join(sys.prefix, 'bin')
  
      # Use XDG_CONFIG_HOME instead of the ~/.pip
      # On some systems, we may have to create this, on others it probably exists
      xdg_dir = os.path.join(user_dir, '.config')
      xdg_dir = os.environ.get('XDG_CONFIG_HOME', xdg_dir)
      if not os.path.exists(xdg_dir):
          os.mkdir(xdg_dir)
      default_storage_dir = os.path.join(xdg_dir, 'pip')
      default_config_file = os.path.join(default_storage_dir, 'pip.conf')
      default_log_file = os.path.join(default_storage_dir, 'pip.log')
      
      # Migration path for users- move things from the old dir if it exists
      # If the new dir exists and has no pip.conf and the old dir does, move it
      # When these checks are finished, delete the old directory
      old_storage_dir = os.path.join(user_dir, '.pip')
      old_config_file = os.path.join(old_storage_dir, 'pip.conf')
      if os.path.exists(old_storage_dir):
          if not os.path.exists(default_storage_dir):
              shutil.copytree(old_storage_dir, default_storage_dir)
          elif os.path.exists(old_config_file) and not os.path.exists(default_config_file):
              shutil.copy2(old_config_file, default_config_file)
          shutil.rmtree(old_storage_dir)
      
      # Forcing to use /usr/local/bin for standard Mac OS X framework installs
      # Also log to ~/Library/Logs/ for use with the Console.app log viewer
      if sys.platform[:6] == 'darwin' and sys.prefix[:16] == '/System/Library/':
          bin_py = '/usr/local/bin'
          default_log_file = os.path.join(user_dir, 'Library/Logs/pip.log')
  