Autogenerate a new revision file (Alias for 'revision --autogenerate')

def migrate(directory, message, sql, head, splice, branch_label, version_path,
            rev_id, x_arg):
    """Autogenerate a new revision file (Alias for 'revision --autogenerate')"""
    _migrate(directory, message, sql, head, splice, branch_label, version_path,
             rev_id, x_arg)