exec.Command 设置输出流未获取所有数据

Question

这有效res = exec.Command(gitCmd, cmdArgs...)res.Stdout, res.Stderr = os.Stdout,os.Stderr执行 git 命令时，git clone ..您会得到完整的语法响应，例如remote: Counting objects: 15, done.remote: Compressing objects: 100% (10/10), done.remote: Total 15 (delta 4), reused 0 (delta 0)Receiving objects: 100% (15/15), done.Resolving deltas: 100% (4/4), done.但是如果你把它包装在一个像这样的多写器中res = exec.Command(gitCmd, cmdArgs...)res.Stdout, res.Stderr = io.MultiWriter(os.Stdout),io.MultiWriter(os.Stderr)您会丢失通常看到的所有解析/接收输出。为什么 ？以下工作但对我来说似乎没有必要，恕我直言 io.MultiWriter 应该做同样的......res = exec.Command(gitCmd, cmdArgs...)res.Stdout, res.Stderr = os.Stdout,os.Stderrstdout, stderr = new(bytes.Buffer), new(bytes.Buffer)go io.Copy(os.Stdout,stdout)go io.Copy(os.Stderr,stderr)