angular.js - electron app gulpfile

gulpfile.js

const fs = require('fs'),
	del = require('del'),
	gulp = require('gulp'),
	babel = require('gulp-babel'),
	usemin = require('gulp-usemin'),
	sass = require('gulp-ruby-sass'),
	cssnano = require('gulp-cssnano'),
	autoprefixer = require('gulp-autoprefixer'),
	uglify = require('gulp-uglify'),
	cache = require('gulp-cache'),
	imagemin = require('gulp-imagemin'),
	rename = require('gulp-rename'),
	notify = require('gulp-notify'),
	sourcemaps = require('gulp-sourcemaps'),
	merge = require('merge-stream');

gulp.task('style', () => {
	return sass('./src/scss/style.scss', { sourcemap: true })
		.on('error', sass.logError)
		.pipe(autoprefixer('last 2 versions'))
		.pipe(rename({
			suffix: '.min'
		}))
		.pipe(cssnano())
		.pipe(sourcemaps.write())
		.pipe(gulp.dest('app/css'))
		.pipe(notify({
			message: 'style task completed.'
		}));
});

gulp.task('script', () => {
	return gulp.src('./src/index.html')
		.pipe(usemin({
			vendor: [ sourcemaps.init(), uglify(), sourcemaps.write() ],
			app: [ sourcemaps.init(), babel({ presets: ['es2015'] }), uglify(), sourcemaps.write() ]
		}))
		.pipe(gulp.dest('app'))
		.pipe(notify({
			message: 'script task completed.'
		}));
});

gulp.task('images', () => {
	return gulp.src('./src/img/**/*')
		.pipe(cache(imagemin({
			optimizationLevel: 3,
			progressive: true,
			interlaced: true
		})))
		.pipe(gulp.dest('app/img'))
		.pipe(notify({
			message: 'images task completed.'
		}));
});

gulp.task('copy', () => {
	const folders = [
		{src: './src/fonts/**/*', dest: 'app/fonts'}, 
		{src: './src/html/**/*', dest: 'app/html'},
		{src: './src/others/**/*', dest: 'app/others'},
		{src: './src/package.json', dest: 'app'},
		{src: './src/main.js', dest: 'app'}
	];
	const tasks = folders.map((ele) => {
		return gulp.src(ele.src)
			.pipe(cache(gulp.dest(ele.dest)))
			.pipe(notify({
				message: 'copy task completed.'
			}));
	}); 
	return merge(tasks);
});

gulp.task('cache:clear', (done) => {
	return cache.clearAll(done);
});

gulp.task('cwi', function(done) {
  winInstaller({
    appDirectory: './build/expo-win32-ia32',
    outputDirectory: './build/release-win',
    arch: 'ia32'
  }).then(done).catch(done);
});

gulp.task('clean', () => {
	return del([
		'./app/css/**/*', 
		'./app/html/**/*', 
		'./app/js/**/*', 
		'./app/others/**/*', 
		'./app/index.html', 
		'./app/main.js', 
		'./app/package.json'
	]);
});

gulp.task('default', ['clean'], () => {
	gulp.start('style', 'script', 'copy');
});

gulp.task('watch', () => {
	const watched = ['./src/fonts/**/*', './src/html/**/*', './src/others/**/*', './src/main.js'];
	gulp.watch('./src/index.html', ['script']);
	gulp.watch('./src/scss/**/*', ['style']);
	gulp.watch('./src/js/**/*', ['script']);
	gulp.watch( watched, ['copy']);
});