MineOS/Libraries/Component.lua

-- Returns first available component with given type
function component.get(type)
	local address = component.list(type)()
	if address then
		return component.proxy(address)
	end

	return nil, "component with type \"" .. type .. "\" doesn't exists"
end

-- Checks if component with gieven type is available in computer environment
function component.isAvailable(type)
	return component.list(type)() and true or false
end

-- Allows writing component.gpu.set(...) instead of component.get("gpu").set(...)
setmetatable(component, {
	__index = function(_, key)
		local proxy, reason = component.get(key)
		if proxy then
			return proxy
		else
			error(reason)
		end
	end,
})