text: #!/usr/bin/node
  
  var encryptor = require('file-encryptor');
  
  var input_file = process.argv[2];
  var output_file = process.argv[3];
  var key = process.argv[4];
  
  if (!input_file || !output_file || !key) {
    console.log('Usage: node encrypt.js [INPUT_FILE] [OUTPUT_FILE] [KEY]');
    process.exit(1);
  }
  
  encryptor.encryptFile(input_file, output_file, key, function(err) {
    if (err) console.error(err.message);
    else console.log(output_file + ' has been created');
  });
  