audio-vis/build/task/js.js

const terser = require('gulp-terser'),
    concat = require('gulp-concat'),
    rename = require('gulp-rename'),
    gulp = require('gulp');

const basePath = __dirname + '/../../raw/javascript/';
const visualPath = basePath + 'visuals/';
const visuals = [
    visualPath + 'sphere.js',
    visualPath + 'wave.js',
    visualPath + 'water.js',
    //visualPath + 'experimental.js',
]
const config = {
    src: [
        basePath + 'utils.js',
        basePath + 'gl/glUtils.js',
        basePath + 'template.js',
        basePath + 'gl/handler.js',
        basePath + 'audio.js',
        basePath + 'player.js',
        basePath + 'gui.js',
        basePath + 'visual.js',
        basePath + 'imageUploader.js',
        basePath + 'notification.js',
        basePath + 'config.js',
        ...visuals,
        basePath + 'eventHandler.js',
        basePath + 'app.js'
    ],
    dest: __dirname + '/../../out/js'
};

function build() {
    return gulp.src(config.src)
        .pipe(concat('scripts.js'))
        .pipe(gulp.dest(config.dest))
        .pipe(rename('scripts.min.js'))
        .pipe(terser())
        .pipe(gulp.dest(config.dest));
}

module.exports.build = build;