inputHandler.js

// Allow commandline parameters to be passed in NodeJS

module.exports = function(alternate_port){  
  var arguments = getCommandLine();
  var arguments = arguments ? arguments : alternate_port;
  if(!arguments){
    throw "Arguments fed into inputHandler.js in both the commandline and parameter appear to be empty or null!";
  }
  return arguments;
}

// In nodejs the process.argv holds the commandline input
// process.argv[0] is 'node'
// process_argv[1] is the file to run if provided
// process_argv[2] can be our port (or anything we desire)
function getCommandLine(arg_array_position = 2){
  return process.argv[arg_array_position] 
}

test_commandline.bat

rem Makes loop with output in command line
rem Then we feed the port in to test module

@echo off
:1
"C:\Program Files\CentralOffice\node.exe" test_inputHandler.js 3000
pause
GOTO 1

test_inputHandler.js

// Run module with function being passed a value

const ph = require('./inputHandler.js');
console.log(ph(6));

x_test

//
//  Todo -- use rest of gist in this
//

// Based on https://stackoverflow.com/a/60615051
// Module call holds export object, which now has FileLister obj - TODO - still need to wire up in other code


// allow for parameter passing via nodejs kicking off
// defaults to current directory
function getTargetDir(target_path){
  var the_path;
   // TODO might need process to detect if the '/' is on there already
   if(!target_path){
        the_path = process.argv[2] ?  __dirname + '/' + process.argv[2] :  __dirname + '/';
   }
   else {
	the_path = target_path + '/';
   }
  return the_path;
}

var conForm = function(target){
  console.log('----');
  console.log({target});
  console.log(target);
  console.log('----');
}



module.exports = {

  // allow for parameter passing via nodejs kicking off
  // defaults to current directory
 //getTargetDir:  function (){
 //  // TODO might need process to detect if the '/' is on there already
 //  return process.argv[2] ?  __dirname + '/' + process.argv[2] : (target_path ? target_path + '/' : __dirname + '/')
 //},

  listDir: function(){
	  //requiring path and fs modules
	  const path = require('path');
	  const fs = require('fs');

	  //joining path of directory 
	  const directoryPath = path.join(getTargetDir(), '/');
	  console.log(directoryPath);

	  var file_list;
	  //passsing directoryPath and callback function
	  fs.readdir(directoryPath, function (err, files) {
	      //handling error
	      if (err) {
		  return console.log('Unable to scan directory: ' + err);
	      } 
	    file_list = files;  // fails to stackoverflow
	console.log('files - ' + files);
	console.log(files);
	//    conForm(file_list);
	  });
	  
	console.log('Exiting the list retrieval post return');
	conForm(file_list);
	return file_list;
	}
};