replace filename with a pattern in a folder for nodejs

changeFileName.js

const { promisify } = require('util');
const { argv } = require('process')
const fs = require('fs');
const path = require('path');

const folder = argv[2]
const oldPattern = argv[3]
const newPattern = argv[4]

const directoryPath = path.join(__dirname, folder);

if (!folder || !fs.existsSync(directoryPath)) {
  console.error('Directory does not exist')
  return
}

const renameFileAsync = promisify(fs.rename);
fs.readdir(directoryPath, function (err, files) {
  if (err) {
    return console.log('Unable to scan directory: ' + err);
  }
  files.forEach(function (file) {
    if (file.includes(oldPattern)) {
      const oldFilePath = directoryPath + '/' + file
      const newName = file.replace(oldPattern, newPattern)
      const newFilePath = directoryPath + '/' + newName
      renameFileAsync(oldFilePath, newFilePath)
      console.log(`success rename file ${file} into ${file.replace(oldPattern, newPattern)}`)
    }
  });
});

demo.md

HOW TO USE NODE SNIPPET

• Clone this gist and store in your computer

• Make sure you have installed Nodejs: https://nodejs.org/en/

• Open terminal and type this:

  node ~/changeFileName.js 'Downloads/test' 'file' 'newFile'

• command explaination

• changeFileName.js is the name of this code snippet

• argument 2 is 'Downloads/test' - the folder which contains file that you want to rename

• 'file': old name pattern

• 'newFile': new name pattern