Gulp run tasks after each other.

gulp-run-task-asynchronously.js

// there were people suggesting using async or event-stream
// this is the way easier solution to run a taks after another taks is done

gulp.task('compileAssets', function() {
    return gulp.src('assets/*').pipe(compile()); // the return is essential!
});

// compileAssets is a dependency
gulp.task('serve', ['compileAssets'], function() {
    return gulp.src('app/**/*.js').pipe(startWebserver());
});