在 Golang 中查看目录是否可写的跨平台方式

我有一个程序，它试图使用Golang将文件写入目录.我需要它能够在MacOS、Linux和Windows中工作(至少).

Golang提供了以下测试--但它似乎只适用于Linux(来自下面链接的SO问题):

func IsWritable(path string) (isWritable bool, err error) {
    isWritable = false
    info, err := os.Stat(path)
    if err != nil {
        fmt.Println("Path doesn't exist")
        return
    }

    err = nil
    if !info.IsDir() {
        fmt.Println("Path isn't a directory")
        return
    }

    // Check if the user bit is enabled in file permission
    if info.Mode().Perm() & (1 << (uint(7))) == 0 {
        fmt.Println("Write permission bit is not set on this file for user")
        return
    }

    var stat syscall.Stat_t
    if err = syscall.Stat(path, &stat); err != nil {
        fmt.Println("Unable to get stat")
        return
    }

    err = nil
    if uint32(os.Geteuid()) != stat.Uid {
        isWritable = false
        fmt.Println("User doesn't have permission to write to this directory")
        return
    }

    isWritable = true
    return
}

我看到了这个答案[1]，但这个问题已经10年没有出现了，有什么比条件编译更好的方法来完成这个任务吗？

摘要:我只想让Go进程了解它是否可以写入给定的目录.

[1]How to tell if folder exists and is writable?