使用golang的os / exec，如何将stdout从一个进程复制到另一个进程的stdin？

I want to emulate a bash pipe using go's os/exec module. Here's a dummy example in bash:

$ ls | wc 
      42      48     807

How can I emulate that in Go? Is there a way to do it with streams?

Via Brad Fitzpatrick, here's one way to do it. You can reassign the Stdin property of the second command to the stdout writer from the first command.

    ls := exec.Command("ls")
    wc := exec.Command("wc")
    lsOut, _ := ls.StdoutPipe()
    ls.Start()
    wc.Stdin = lsOut

    o, _ := wc.Output()
    fmt.Println(string(o))