Golang Make sure all goroutine function executed unless there is an error

main.go

package main

import (
	"errors"
	"fmt"
	"log"
	"os"
	"strconv"
	"sync"
	"time"
)

func main() {
	errChan := make(chan error)
	wg := sync.WaitGroup{}

	wg.Add(2)
 	go func() {
 		defer wg.Done()
		err := process(1)
		if err != nil {
			log.Println("Error 1")
			errChan <- err
		}
 	}()

	go func() {
		defer wg.Done()
		err := process(2)
		if err != nil {
			log.Println("Error 2")
			errChan <- err
		}
	}()

	go func() {
		select {
		case err := <-errChan:
			fmt.Println(err)
			os.Exit(1)
		}
	}()

	wg.Wait()
}


func process(procX int)  error {
	time.Sleep(time.Duration(procX) * time.Second)
	if procX == 2{
		return errors.New("error happen")
	}
	fmt.Println("PROCESS " + strconv.Itoa(procX) + " DONE")
	return nil
}

The use case would be: when you want to make sure all process are executed concurrently but want to discard the whole thing if there is an error in one of the process