send ping to redis from nvim's lua runtime

redis_ping.lua

local uv = vim.loop

local sock = assert(uv.new_pipe())
uv.pipe_connect(sock, "/run/user/1000/redis.sock", function(err) assert(err == nil, err) end)

uv.read_start(sock, function(err, data)
  if err then
    print("read error", err)
  elseif data then
    print("read data", data)
    -- oneshot
    uv.close(sock)
  else
    print("sock closed")
  end
end)

uv.write(sock, "*1\r\n$4\r\nping\r\n", function(err) assert(err == nil, err) end)