docs: def list_all():
      '''
      Lists all ports available.
  
      CLI Example:
  
      .. code-block:: bash
  
          salt '*' ports.list_all
  
      .. warning::
  
          Takes a while to run, and returns a **LOT** of output
      '''
      if 'ports.list_all' not in __context__:
          __context__['ports.list_all'] = []
          for path, dirs, files in salt.utils.path.os_walk('/usr/ports'):
              stripped = path[len('/usr/ports'):]
              if stripped.count('/') != 2 or stripped.endswith('/CVS'):
                  continue
              __context__['ports.list_all'].append(stripped[1:])
      return __context__['ports.list_all']