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const fs = require('fs');
const path = require('path');
const args = process.argv.slice(2);
const dir = args[0];
const match = RegExp(args[1], 'g');
const replace = args[2];
const files = fs.readdirSync(dir);

files
  .filter(file => file.match(match))
  .forEach(file => {
    const filePath = path.join(dir, file);
    const newFilePath = path.join(dir, file.replace(match, replace));

    fs.renameSync(filePath, newFilePath);
  });

// Usage
// node rename.js path/to/directory 'string-to-search' 'string-to-replace'