从Go'exec()'调用'git shortlog'有什么问题?

git shortlog 从去拿输出,但我撞到了墙。

下面是一个我可以用它来做的工作示例 git log :

package main

import (
    "fmt"
    "os"
    "os/exec"
)

func main() {
    runBasicExample()
}

func runBasicExample() {
    cmdOut, err := exec.Command("git", "log").Output()
    if err != nil {
        fmt.Fprintln(os.Stderr, "There was an error running the git command: ", err)
        os.Exit(1)
    }
    output := string(cmdOut)
    fmt.Printf("Output: \n%s\n", output)
}

它给出了预期的输出:

$>  go run show-commits.go 
Output: 
commit 4abb96396c69fa4e604c9739abe338e03705f9d4
Author: TheAndruu
Date:   Tue Aug 21 21:55:07 2018 -0400

    Updating readme

git短日志

不知为什么。。。我只是不能让它和短日志一起工作。程序又来了,唯一的变化是git命令行:

package main

import (
    "fmt"
    "os"
    "os/exec"
)

func main() {
    runBasicExample()
}

func runBasicExample() {
    cmdOut, err := exec.Command("git", "shortlog").Output()
    if err != nil {
        fmt.Fprintln(os.Stderr, "There was an error running the git command: ", err)
        os.Exit(1)
    }
    output := string(cmdOut)
    fmt.Printf("Output: \n%s\n", output)
}

$>  go run show-commits.go 
Output: 

我能跑 git短日志 直接从命令行运行,看起来运行良好。检查 docs

有谁能帮我指出我能做什么不同的吗?

谢谢