gulpfile.js

var gulp = require('gulp');
var concat = require('gulp-concat');
var sourcemaps = require('gulp-sourcemaps');
var uglify = require('gulp-uglify');

var cssnano = require('gulp-cssnano');
var sass = require('gulp-sass');
var autoprefixer = require('gulp-autoprefixer');

var SOURCES = {
  js: [
  
  ],
  
  scss: [
  
  ]
}

gulp.task('js', function () {
  gulp.src(SOURCES.js)
    .pipe(sourcemaps.init())
      .pipe(concat('bundle.js'))
      .pipe(uglify())
    .pipe(sourcemaps.write('.'))
    .pipe(gulp.dest('public/dist/'))
});

gulp.task('scss', function() {
   return gulp.src(SOURCES.scss)
     .pipe(sourcemaps.init())
     .pipe(sass())
     .pipe(autoprefixer({
          browsers: ['last 2 versions'],
          cascade: false
      }))
     .pipe(concat("bundle.css"))
     .pipe(cssnano())
     .pipe(sourcemaps.write('.'))
     .pipe(gulp.dest('public/dist/'));
});


gulp.task('watch', ['js', 'scss'], function () {
  gulp.watch('public/js/**/*.js', ['js']);
  gulp.watch('resources/assets/sass/**/*.scss', ['scss']);
});

gulp.task('default', ['watch']);