使用nodejs从异步函数返回列表

I have the following code :

我有以下代码:

var fs = require("fs");

function getMediaList(){
    var media_copy_list, line_list;
    media_copy_list = [];

    fs.readFile("input.csv", function(err, data) {

      line_list = data.toString('utf-8').trim().split('\n');
      return line_list.forEach(function(file_line) {
        var output_path, source_path, split_list;
        if (file_line.length) {
          split_list = file_line.split(';');
          console.log(split_list[0]);
          if (split_list.length >= 2) {
            source_path = split_list[0].toString('utf-8').trim();
            output_path = split_list[1].toString('utf-8').trim();
            media_copy_list.push({
              source: source_path,
              destination: output_path
            });
          }
        }
      });
    });
}
var fs