gulpfile.js

const gulp = require('gulp');
const uglify = require('gulp-uglify');
const concat = require('gulp-concat');

// path prefix
const prefix = 'assets/';
const vendorPrefix = `${prefix}src/vendor/`;
const bowerPrefix = `${prefix}src/bower/`;

const files = {
  vendor: [],
  library: [],
  libraryAdmin: [
    `${prefix}src/app/main.js`
  ],
  vendorAdmin: [
    `${vendorPrefix}jshint.js`,
    `${vendorPrefix}codemirror-5.14.2/lib/codemirror.js`,
    `${vendorPrefix}codemirror-5.14.2/mode/javascript/javascript.js`,
    `${vendorPrefix}codemirror-5.14.2/addon/selection/active-line.js`,
    `${vendorPrefix}codemirror-5.14.2/addon/edit/matchbrackets.js`,
    `${vendorPrefix}codemirror-5.14.2/addon/lint/lint.js`,
    `${vendorPrefix}codemirror-5.14.2/addon/lint/javascript-lint.js`,
    `${bowerPrefix}pikaday/pikaday.js`
  ],
  productionAdmin: [
    `${prefix}build/js/vendorAdmin.min.js`,
    `${prefix}build/js/libraryAdmin.min.js`
  ],
  productionClient: [
    `${prefix}build/js/vendor.min.js`,
    `${prefix}build/js/library.min.js`
  ]
};

const css = [
  `${bowerPrefix}baseless/dist/style.min.css`,
  `${vendorPrefix}codemirror-5.14.2/lib/codemirror.css`,
  `${vendorPrefix}codemirror-5.14.2/theme/neo.css`,
  `${vendorPrefix}codemirror-5.14.2/addon/lint/lint.css`,
  `${bowerPrefix}pikaday/css/pikaday.css`,
  `${prefix}src/css/container.css`,
  `${prefix}src/css/custom.css`
];

Object.keys(files).forEach((file) => {
  gulp.task(file, () => {
    gulp.src(files[file])
      .pipe(uglify())
      .pipe(concat(`${file}.min.js`))
      .pipe(gulp.dest(`${prefix}build/js`));
  });
});

gulp.task('css', () => {
  gulp.src(css)
    .pipe(concat('style.min.css'))
    .pipe(gulp.dest(`${prefix}build/css`));
});

gulp.task('watch', () => {
  Object.keys(files).forEach((file) => gulp.watch(files[file], [file]));
  gulp.watch(css, ['css']);
});

const uberTasks = Object.keys(files);
uberTasks.push('watch');

gulp.task('uber', uberTasks);
gulp.task('default', uberTasks);