Bake a ``shell`` command so it's ready to execute and returns None.

        :return: None

def bake(self):
        """
        Bake a ``shell`` command so it's ready to execute and returns None.

        :return: None
        """
        command_list = self.command.split(' ')
        command, args = command_list[0], command_list[1:]

        self._sh_command = getattr(sh, command)
        # Reconstruct command with remaining args.
        self._sh_command = self._sh_command.bake(
            args, _env=self.env, _out=LOG.out, _err=LOG.error)