Gulp reload on gulpfile.js change

gulpfile.js

// Gulp restart when gulpfile is changed
var spawn = require('child_process').spawn;

gulp.task('gulp-autoreload', function() {
  // Store current process if any
  var p;
  
  gulp.watch('gulpfile.js', spawnChildren);
  // Comment the line below if you start your server by yourslef anywhere else
  spawnChildren();

  function spawnChildren(e) {
    if(p) {
        p.kill(); 
    }

    p = spawn('gulp', ['build'], {stdio: 'inherit'});
  }
});

gulp.task('build', function() {
  // Your stuff here with build
  // Moreover, it's a good idea to have livereload if necessary
})