gistfile1.js

q.all([only(), debug()])
  .then(flatten)
  .then(function(lines) {
    var dfd = q.defer();
    var rl = readline.createInterface({
      input: process.stdin,
      output: process.stdout
    });

    rl.question(lines[0] + ' -- is this cool? (n)o , (y)es >', function(answer) {
      if ( answer.toLower() === 'n' ) {
        /**
        * This should stop the promise chain and trigger the `fail`.
        */
        dfd.reject('line has been rejected');
      } else {
        /**
        * This should continue the promise chain;
        */
        dfd.resolve('line has been accepted');
      }
      rl.close();
    });

    return dfd.promise;
  })
  .fail(function(err) {
    console.log(err, '--- might not want these in yr commit ---\n');
    exit(1);
  })
  .finally(function() {
    console.log('status of dfd', dfd.promise.isFulfilled());
    exit();
  });