dnf install dnf-automatic

/usr/bin/dnf-automatic > /tmp/dnf.log
curl -s http://127.0.0.1:8080/check/dnf

[root@dd ~]# /usr/bin/dnf-automatic 
Last metadata expiration check: 1:38:42 ago on Fri 20 Sep 2024 07:44:36 PM CST.
The following updates were downloaded on 'dd':
===============================================================
 Package        Arch        Version        Repository                      Size
===============================================================
Upgrading:
 mypackage      x86_64      1.1-1.el9      root_rpmbuild_RPMS_x86_64      9.5 k

Transaction Summary
===============================================================
Upgrade  1 Package

func checkDnf(c *gin.Context) {

	file, err := os.Open("/tmp/dnf.log")
	if err != nil {
		fmt.Println("Error opening file:", err)
		return
	}
	defer file.Close()

	scanner := bufio.NewScanner(file)
	var lines []string

	// 跳过第一行
	scanner.Scan()

	// 读取剩余的行
	for scanner.Scan() {
		lines = append(lines, scanner.Text())
	}
	if err = scanner.Err(); err != nil {
		fmt.Println("Error reading file:", err)
		return
	}

	result := strings.Join(lines, "\n")

	if result != "" {

		_, err = db.Redis.Get(c.Request.Context(), "dnf").Result()
		if errors.Is(err, redis.Nil) {
			slog.InfoContext(c.Request.Context(), "send dnf update message")
			message.SendWechatMessage(c, result)
			db.Redis.Set(c.Request.Context(), "dnf", "true", 0)
		} else if err != nil {
			_ = c.Error(err)
			return
		} else {
			slog.InfoContext(c.Request.Context(), "ignore dnf update message")
		}

	} else {
		slog.InfoContext(c.Request.Context(), "no dnf update")
	}

}

cat /etc/dnf/plugins/post-transaction-actions.d/update.action
*:any:if [ "$state" = "upgraded" ]; then /data/bin/redis-cli del dnf; fi