def create_custom_exec_script(self):
        """ bash script w/ custom commands inside
        inspired by half a night trying to avoid escaping bash special characters

        """
        cfg_path = "agent_customs_{}.cfg".format(self.host)
        if os.path.isfile(cfg_path):
            logger.info(
                'Found agent custom execs config file in working directory with the same name as created for host %s.\n'
                'Creating new one via tempfile. This will affect predictable filenames for agent artefacts',
                self.host)
            handle, cfg_path = tempfile.mkstemp('.sh', 'agent_customs_')
            os.close(handle)

        cmds = ""
        for idx, cmd in enumerate(self.custom):
            cmds += "-{idx}) {cmd};;\n".format(idx=idx, cmd=cmd['cmd'])
        customs_script = """
        #!/bin/sh
        while :
        do
            case "$1" in
            {cmds}
            *) break;;
            esac
            shift
        done
        """.format(cmds=cmds)

        with open(cfg_path, 'w') as fds:
            fds.write(customs_script)
        return cfg_path
bash script w/ custom commands inside
        inspired by half a night trying to avoid escaping bash special characters