orChan.go

package main

import "fmt"

func orChan(chans ...chan interface{}) chan interface{} {
	switch len(chans) {
	case 0:
		return nil
	case 1:
		return chans[0]
	}
	done := make(chan interface{})

	go func() {
		defer close(done)
		select {
		case <-chans[0]:
		case <-orChan(chans[1:]...):
		}
	}()
	return done
}

func main() {
	chans := make([]chan interface{}, 6)
	for i := range chans {
		chans[i] = make(chan interface{})
	}
	close(chans[5])
	fmt.Println(<-orChan(chans...))
}