go语言通过管道连接两个命令行进程的方法

package main
import (
  "os"
  "os/exec"
  "fmt"
  "flag"
  "strings"
)
func main() {
generator := exec.Command("cmd1")
consumer := exec.Command("cmd2")
pipe, err := consumer.StdinPipe()
generator.Stdout = pipe
}