1package cleaner
 2
 3import (
 4	"fmt"
 5	"os"
 6	"os/signal"
 7	"syscall"
 8)
 9
10type t func() error
11
12var cleaners []t
13var inactive bool
14
15// Register a cleaner function. When a function is registered, the Signal watcher is started in a goroutine.
16func Register(f t) {
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			fmt.Println("")
25			clean()
26			os.Exit(1)
27		}()
28	}
29}
30
31// Clean invokes all registered cleanup functions
32func clean() {
33	fmt.Println("Cleaning")
34	for _, f := range cleaners {
35		_ = f()
36	}
37	cleaners = []t{}
38}