gulp deploy task for creating a number incremented folder for symlinking to

build.js

/**
 * For creating a numbered folder inside /deploys,
 * shoving in the contents of /dist and for symlinking to when happy. Eg:
 *   /deploys/2
 *   /www --> symlinks to --> /deploys/2
 */
gulp.task('deploy', function (cb) {
  var deploys = fs.readdirSync('./deploys');
  var version = 1;
  if (deploys.length) {
    version = parseInt(_.max(deploys, function(num) {
      var numb = parseInt(num, 10);
      if (!isNaN(numb)) {
        return numb;
      }
    }), 10) + 1 || 1;
  }
  gutil.log(gutil.colors.cyan('Deploying: v' + version));
  return gulp.src('dist/**/*')
    .pipe(gulp.dest('deploys/' + version));
});