woodpecker/pipeline/interrupt/interrupt.go
Masaya Watanabe 7913d6db95
Fix channel buffer used with signal.Notify (#421)
Co-authored-by: Anbraten <anton@ju60.de>
2021-10-09 03:14:25 +02:00

36 lines
804 B
Go

package interrupt
import (
"context"
"os"
"os/signal"
)
// WithContext returns a copy of parent context whose Done channel is closed
// when an os interrupt signal is received.
func WithContext(ctx context.Context) context.Context {
return WithContextFunc(ctx, func() {
println("ctrl+c received, terminating process")
})
}
// WithContextFunc returns a copy of parent context that is cancelled when
// an os interrupt signal is received. The callback function f is invoked
// before cancellation.
func WithContextFunc(ctx context.Context, f func()) context.Context {
ctx, cancel := context.WithCancel(ctx)
go func() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
defer signal.Stop(c)
select {
case <-ctx.Done():
case <-c:
f()
cancel()
}
}()
return ctx
}