def interpret_directive_line(self, line):
     splitted_line = line.split()
     if splitted_line[1] == 'require':
         return AssetLine.create_require(splitted_line[2])
     elif splitted_line[1] == 'require_self':
         return AssetLine.create_require_self()
     else:
         # TODO(stan): need to implement 'require_tree', 'require_dir'
         raise Exception()
 def interpret_line(self, line):
     line = line.rstrip()
     if self.manifest_ended:
         return AssetLine.create_content_line(line)
     else:
         if self.multi_line_comment_opened:
             if self.is_line_multi_line_directive(line):
                 return self.interpret_directive_line(line)
             else:
                 if self.is_line_closing_multi_line_comment(line):
                     self.multi_line_comment_opened = False
                 return AssetLine.create_content_line(line)
         else:
             if self.is_line_opening_multi_line_comment(line):
                 self.multi_line_comment_opened = True
                 return AssetLine.create_content_line(line)
             elif self.is_line_single_line_directive(line):
                 return self.interpret_directive_line(line)
             else:
                 self.manifest_ended = True
                 return AssetLine.create_content_line(line)