moved cleaner function to util/interrupt

1 files changed, 39 insertions, 0 deletions

diff --git a/util/interrupt/cleaner.go b/util/interrupt/cleaner.go
new file mode 100644
index 00000000..dfb8e25b
--- /dev/null
+++ b/util/interrupt/cleaner.go
@@ -0,0 +1,39 @@
+package interrupt
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+)
+
+type Cleaner func() error
+
+var cleaners []Cleaner
+var inactive bool
+
+// RegisterCleaner is responsible for regisreting a cleaner function. When a function is registered, the Signal watcher is started in a goroutine.
+func RegisterCleaner(f Cleaner) {
+	cleaners = append(cleaners, f)
+	if !inactive {
+		inactive = false
+		go func() {
+			ch := make(chan os.Signal, 1)
+			signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, os.Interrupt)
+			<-ch
+			// Prevent un-terminated ^C character in terminal
+			fmt.Println()
+			clean()
+			os.Exit(1)
+		}()
+	}
+}
+
+// Clean invokes all registered cleanup functions
+func clean() {
+	fmt.Println("Cleaning")
+	for _, f := range cleaners {
+		_ = f()
+	}
+	cleaners = []Cleaner{}
+}