Timeout for WaitGroup.Wait()

Question

What is an idiomatic way to assign a timeout to WaitGroup.Wait() ?

The reason I want to do this, is to safeguard my \'scheduler\' from potentially awaiting an errant \'w

Answer 1

This is not an actual answer to this question but was the (much simpler) solution to my little problem when I had this question.

My 'workers' were doing http.Get() requests so I just set the timeout on the http client.

urls := []string{"http://1.jpg", "http://2.jpg"}
wg := &sync.WaitGroup{}
for _, url := range urls {
    wg.Add(1)
    go func(url string) {
        client := http.Client{
            Timeout: time.Duration(3 * time.Second), // only want very fast responses
        }
        resp, err := client.Get(url)
        //... check for errors
        //... do something with the image when there are no errors
        //...

        wg.Done()
    }(url)

}
wg.Wait()