code: def set_standard_vars(cls, executor, context, variant, build_type,
                            install, build_path, install_path=None):
          
          vars = cls.get_standard_vars(context=context,
                                       variant=variant,
                                       build_type=build_type,
                                       install=install,
                                       build_path=build_path,
                                       install_path=install_path)
  
          for var, value in vars.iteritems():
              executor.env[var] = value
docs: Sets a standard set of environment variables for the build system to
          use