Bug 1640815: Raise helpful error if no non-public commits on bootstrap r=rstewart

        return self._client.rawcommand(args).decode('utf-8')

    def get_commit_time(self):

        return int(self._run(

        newest_public_revision_time = self._run(

            'log', '--rev', 'heads(ancestors(.) and not draft())',

            '--template', '{word(0, date|hgdate)}', '--limit', '1').strip())

            '--template', '{word(0, date|hgdate)}', '--limit', '1').strip()

        if not newest_public_revision_time:

            raise RuntimeError('Unable to find a non-draft commit in this hg '

                               'repository. If you created this repository from a '

                               'bundle, have you done a "hg pull" from hg.mozilla.org '

                               'since?')

        return int(newest_public_revision_time)

    def sparse_checkout_present(self):

        # We assume a sparse checkout is enabled if the .hg/sparse file