test

gistfile1.go

package main

import "fmt"

func main() {
  for i := 0; i < 5; i++ {
    fmt.Println("Hello, World!")
  }
}

func restore(repos []string) error {
  errChan := make(chan error, 1)
  sem := make(chan int, 4) // four jobs at once
  var wg sync.WaitGroup
  wg.Add(len(repos))
  for _, repo := range repos {
    sem <- 1
    go func() {
      defer func() {
        wg.Done()
        <-sem
      }()
      if err := fetch(repo); err != nil {
        errChan <- err
      }
    }()
  }
  wg.Wait()
  close(sem)
  close(errChan)
  return <-errChan
}