How to use the imjoy.runners.subprocess.Popen function in imjoy

def run_cmd(
    engine,
    cmd,
    shell=False,
    cwd=None,
    check_returncode=True,
    callback=None,
    plugin_id=None,
):
    """Run command.

    From https://github.com/vcs-python/libvcs/.
    """
    proc = subprocess.Popen(
        cmd,
        shell=shell,
        stderr=subprocess.PIPE,
        stdout=subprocess.PIPE,
        creationflags=0,
        bufsize=1,
        cwd=cwd,
    )
    if plugin_id is not None:
        set_plugin_pid(engine, plugin_id, proc.pid)

    all_output = []
    code = None
    line = None
    while code is None:
        code = proc.poll()

args = " ".join(args)
    logger.info("Task subprocess args: %s", args)

    # set system/version dependent "start_new_session" analogs
    # https://docs.python.org/2/library/subprocess.html#converting-argument-sequence
    kwargs = {}
    if sys.platform != "win32":
        kwargs.update(preexec_fn=os.setsid)
    progress = 100
    logging_callback(progress, type="progress")
    try:
        _env = plugin_env.copy()
        _env.update(environment_variables)
        logger.debug("Running process with env: %s", _env)
        process = subprocess.Popen(
            args,
            bufsize=1,
            stdout=subprocess.PIPE,
            stderr=subprocess.PIPE,
            shell=True,
            env=_env,
            cwd=work_dir,
            **kwargs,
        )
        logging_callback(f"Running subprocess (pid={process.pid}) with {args}")
        set_plugin_pid(engine, plugin_id, process.pid)
        # Poll process for new output until finished
        stdfn = sys.stdout.fileno()

        progress = 0
        logging_callback(progress, type="progress")