sync.js

// Syncs two folders together. If a file is added, updated, or deleted in the original folder, it will be added, updated, or deleted in the duplicate folder. Uses fs.watch() to watch for changes in the original folder, so make sure your OS supports it.

const fs = require('fs');
const path = require('path');

const originalFolder = process.argv[2];
const duplicateFolder = process.argv[3];

if (!originalFolder || !duplicateFolder) {
  console.error('Usage: node sync.js <original_folder> <duplicate_folder>');
  process.exit(1);
}

function copyFolderSync(src, dest) {
  if (!fs.existsSync(dest)) {
    fs.mkdirSync(dest);
  }

  const entries = fs.readdirSync(src, { withFileTypes: true });

  for (const entry of entries) {
    const srcPath = path.join(src, entry.name);
    const destPath = path.join(dest, entry.name);

    if (entry.isDirectory()) {
      copyFolderSync(srcPath, destPath);
    } else {
      fs.copyFileSync(srcPath, destPath);
    }
  }
}

function watchFolder(folder) {
  fs.watch(folder, { recursive: true }, (eventType, filename) => {
    if (filename) {
      const srcPath = path.join(originalFolder, filename);
      const destPath = path.join(duplicateFolder, filename);

      if (fs.existsSync(srcPath)) {
        if (fs.lstatSync(srcPath).isDirectory()) {
          copyFolderSync(srcPath, destPath);
        } else {
          fs.copyFileSync(srcPath, destPath);
        }
      } else {
        fs.rmSync(destPath, { recursive: true, force: true });
      }
    }
  });
}

copyFolderSync(originalFolder, duplicateFolder);
watchFolder(originalFolder);