gulpfile-browserify.js

var gulp = require('gulp')
  , browserify = require('gulp-browserify')
  , hbsfy = require('hbsfy')
;

gulp.task('scripts', function() {
  return gulp.src('./js/main.js')
    .pipe(browserify({
      debug: true,
      transform: ['hbsfy'],
    }))
    .pipe(gulp.dest('./build/'));
});

gulp.task('default', function() {
  gulp.run('scripts');
  gulp.watch('./js/**/*.js', function() {
    gulp.run('scripts');
  });
});