Return an architecture for this task.

        :returns: an arch string (eg "noarch", or "ppc64le"), or None this task
                  has no architecture associated with it.

def arch(self):
        """
        Return an architecture for this task.

        :returns: an arch string (eg "noarch", or "ppc64le"), or None this task
                  has no architecture associated with it.
        """
        if self.method in ('buildArch', 'createdistrepo', 'livecd'):
            return self.params[2]
        if self.method in ('createrepo', 'runroot'):
            return self.params[1]
        if self.method == 'createImage':
            return self.params[3]
        if self.method == 'indirectionimage':
            return self.params[0]['arch']