An example of Node.js copying using read/write file.

RMMVNodejs2-1.js

//=============================================================================
//  RMMVNodeP1.js
//=============================================================================

/*:
* @author PluginDev
* @plugindesc A plugin to read and write files using Node.js
*
*/
(function () {

  //Setup function in case we want to split up our code further  
  function setup() {
//=============================================================================
//  MVNodeFS
//=============================================================================    
    function MVNodeFS() {

    }

    MVNodeFS.fs = require("fs");

    //Wrapper for Node.js writeFileSync
    MVNodeFS.writeFile = function (filePath, filename, data) {
      filePath = this.createPath("/" + filePath +"/");
      this.fs.writeFileSync(filePath + filename, data);
      console.log("Wrote File: " + filename);
    };

    //Wrapper for Node.js readFileSync
    MVNodeFS.readFile = function (filePath, filename) {
      filePath = this.createPath("/" + filePath +"/");
      console.log("Read File:", filename);
      //Returning the file we read using utf8 encoding; this means it will be in text
      return this.fs.readFileSync(filePath + filename, "utf8");
    };

    //Method for creating the proper file path from the relative file path
    MVNodeFS.createPath = function (relativePath) {
      //Checks if MV is in dev mode, or production, then decides the appropriate path
      relativePath = (Utils.isNwjs() && Utils.isOptionValid("test")) ? relativePath : "/www/" + relativePath;
      //Creates the path using the location pathname of the window and replacing certain characters
      var path = window.location.pathname.replace(/(\/www|)\/[^\/]*$/, relativePath);
      if(path.match(/^\/([A-Z]\:)/)) {
        path = path.slice(1);
      }
      //Decode URI component and finally return the path
      path = decodeURIComponent(path);
      return path;
    };
    
    //Splits the path into the folder & and filename
    MVNodeFS.splitPath = function(path) {
      var splitPath = path.split("/");
      //"folder" or path is created by splitting path by "/" and joining them together except the last
      // one, which would be the filename.
      var folder = splitPath.slice(0, splitPath.length - 1).join("/") + "/";
      //filename is the last element in the array that we split, allowing us to use it as the name.
      var file = splitPath[splitPath.length - 1].trim();
      return { folder, file };
    };
    
    //Copy Files using Read & Write
    MVNodeFS.copyFile = function(src, destination) {
      var splitPathSrc = this.splitPath(src);
      var splitPathDes = this.splitPath(destination);
      //Read the src file data.
      var data = this.readFile(splitPathSrc.folder, splitPathSrc.file); 
      //Write the src file data to the destination
      this.writeFile(splitPathDes.folder, splitPathDes.file, data);
    };
    
    //Export Our Class so it can be used anywhere
    window.MVNodeFS = MVNodeFS;
  }

  //Execute setup function to run our code after setup
  setup();
})();