gulp example code

gulp.example.js

const gulp = require('gulp');
const concat = require('gulp-concat');
const uglify = require('gulp-uglify');
const removeLogs = require('gulp-removelogs');
const debug = require('gulp-debug');

var files = [
  'path/to/file.js'
];

gulp.task('build-js', () => {
  return gulp.src(files)
    .pipe(debug({
      title : 'build-js:build:'
    }))
    .pipe(removeLogs())
    .pipe(uglify({
      mangle : true,
      compress : true
    }))
    .pipe(concat('app.js'))
    .pipe(gulp.dest('public/dist/js/'));
});

// default
gulp.task('default', ['build-js']);

// watch (realtime build)
gulp.task('watch', () => {
  gulp.watch(files, ['build-js']);
});

module.exports = gulp;