1package interrupt
 2
 3import (
 4	"fmt"
 5	"os"
 6	"os/signal"
 7	"syscall"
 8)
 9
10type Cleaner func() error
11
12var cleaners []Cleaner
13var inactive bool
14
15// RegisterCleaner is responsible for regisreting a cleaner function. When a function is registered, the Signal watcher is started in a goroutine.
16func RegisterCleaner(f Cleaner) {
17	cleaners = append(cleaners, f)
18	if !inactive {
19		inactive = false
20		go func() {
21			ch := make(chan os.Signal, 1)
22			signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM, os.Interrupt)
23			<-ch
24			// Prevent un-terminated ^C character in terminal
25			fmt.Println()
26			clean()
27			os.Exit(1)
28		}()
29	}
30}
31
32// Clean invokes all registered cleanup functions
33func clean() {
34	fmt.Println("Cleaning")
35	for _, f := range cleaners {
36		_ = f()
37	}
38	cleaners = []Cleaner{}
39}