feat: add aliyundrive driver

pkg/cron/cron.go

@@ -0,0 +1,35 @@
+package cron
+
+import "time"
+
+type Cron struct {
+	d  time.Duration
+	ch chan struct{}
+}
+
+func NewCron(d time.Duration) *Cron {
+	return &Cron{
+		d:  d,
+		ch: make(chan struct{}),
+	}
+}
+
+func (c *Cron) Do(f func()) {
+	go func() {
+		ticker := time.NewTicker(c.d)
+		defer ticker.Stop()
+		for {
+			select {
+			case <-ticker.C:
+				f()
+			case <-c.ch:
+				return
+			}
+		}
+	}()
+}
+
+func (c *Cron) Stop() {
+	c.ch <- struct{}{}
+	close(c.ch)
+}