How to config the yabs.nvim echo some hints after command is done?

[lee-shun]

Hello!

Thank you for this great plugin!

the following is my setup file for cpp:

local cpp_config = {
	default_task = "build_and_run",
	tasks = {
		build = {
			command = function()
				return "g++ -std=c++11 "
					.. vim.fn.expand("%:t")
					.. " -Wall -ggdb -o "
					.. vim.fn.expand("%:t:r")
					.. ".out"
			end,
			output = "quickfix",
			opts = { open_on_run = "auto" },
		},
		run = {
			command = function()
				return "time ./" .. vim.fn.expand("%:t:r") .. ".out"
			end,
			output = "terminal",
		},
	},
}

require("yabs"):setup({
	languages = {
		cpp = cpp_config,
	},
})

Everything works fine,
but when a file is compiled, I sometimes don't know if the build is done or not, especially when there are no warnings at all.

I expect it can :

1. echo some "hints" when there is no warning or errors
2. open quickfix list when there are some errors

Thank you!