fsPromises.realpath(path[, options])

    使用与 fs.realpath.native() 函数相同的语义确定 path 的实际位置。

    Determines the actual location of path using the same semantics as the fs.realpath.native() function.

    Only paths that can be converted to UTF8 strings are supported.

    The optional options argument can be a string specifying an encoding, or an object with an encoding property specifying the character encoding to use for the path. If the encoding is set to 'buffer', the path returned will be passed as a <Buffer> object.

    On Linux, when Node.js is linked against musl libc, the procfs file system must be mounted on /proc in order for this function to work. Glibc does not have this restriction.