monitoring create/removal of log files

playground/1-file-watch/create-delete-monitor.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"regexp"
+	"time"
+
+	"github.com/radovskyb/watcher"
+)
+
+func main() {
+	w := watcher.New()
+
+	w.FilterOps(watcher.Create, watcher.Remove)
+
+	r := regexp.MustCompile("^abc$")
+	w.AddFilterHook(watcher.RegexFilterHook(r, false))
+
+	// dispatch creation/removal events here
+	go func() {
+		for {
+			select {
+			case event := <-w.Event:
+				// fmt.Println(event)
+				fmt.Printf("%s (%s)\n", event.Path, event.Op)
+			case err := <-w.Error:
+				log.Fatalln(err)
+			case <-w.Closed:
+				return
+			}
+		}
+	}()
+
+	if err := w.Add("."); err != nil {
+		log.Fatalln(err)
+	}
+
+	for path, f := range w.WatchedFiles() {
+		fmt.Printf("%s: %s\n", path, f.Name())
+	}
+
+	fmt.Println("=== startup complete ===")
+
+	// go func() {
+	// 	w.Wait()
+	// 	w.TriggerEvent(watcher.Create, nil)
+	// }()
+
+	if err := w.Start(time.Millisecond * 100); err != nil {
+		log.Fatalln(err)
+	}
+
+}