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gulpfile.js

+var gulp = require('gulp');
+var uglify = require('gulp-uglify');
+var htmlmin = require('gulp-htmlmin');
+var cssmin = require('gulp-cssmin');
+var concat = require('gulp-concat');
+var zip = require('gulp-zip');
+var fs = require('fs');
+var mkdirp = require('mkdirp');
+var chalk = require('chalk');
+var watch = require('gulp-watch');
+
+//Chalk colors
+var error = chalk.bold.red;
+var success = chalk.green;
+var regular = chalk.white;
+
+gulp.task('watch', (done) => {
+	gulp.watch('./src/js/**/*.js', gulp.series('build-js', 'zip', 'check'));
+	gulp.watch('./src/html/**/*.html', gulp.series('build-html', 'check'));
+	gulp.watch('./src/css/**/*.css', gulp.series('build-css', 'check'));
+	gulp.watch('./src/assets/**/*', gulp.series('build-assets', 'check'));
+});
+
+gulp.task('init', (done) => {
+	//Create our directory structure
+	mkdirp('./src', function (err) {
+		mkdirp('./src/js', function (err) {
+			mkdirp('./src/html', function (err) {
+				mkdirp('./src/css', function (err) {
+					mkdirp('./src/assets', function (err) {
+						done();
+					});
+				});
+			});
+		});
+	});
+});
+
+gulp.task('build-js', (done) => {
+	return gulp.src('./src/js/**/*.js')
+	.pipe(concat('game.js'))
+	.pipe(uglify())
+	.pipe(gulp.dest('./build/'));
+});
+
+gulp.task('build-html', (done) => {
+	return gulp.src('./src/html/**/*.html')
+		.pipe(htmlmin({collapseWhitespace: true}))
+		.pipe(gulp.dest('./build/'));
+});
+
+gulp.task('build-css', (done) => {
+	return gulp.src('./src/css/**/*.css')
+		.pipe(cssmin())
+		.pipe(gulp.dest('./build/'));
+});
+
+gulp.task('build-assets', (done) => {
+	return gulp.src('./src/assets/**/*')
+		.pipe(gulp.dest('./build/'));
+});
+
+gulp.task('zip', (done) => {
+	return gulp.src('./build/**/*')
+		.pipe(zip('entry.zip')) //gulp-zip performs compression by default
+		.pipe(gulp.dest('dist'));
+});
+
+gulp.task('check', gulp.series('zip', (done) => {
+	var stats = fs.statSync("./dist/entry.zip")
+	var fileSize = stats.size;
+	if (fileSize > 13312) {
+		console.log(error("Your zip compressed game is larger than 13kb (13312 bytes)!"))
+		console.log(regular("Your zip compressed game is " + fileSize + " bytes"));
+	} else {
+		console.log(success("Your zip compressed game is " + fileSize + " bytes."));
+	}
+	done();
+}));
+
+gulp.task('build', gulp.series('build-html', 'build-js', 'build-assets', 'check', (done) => {
+	done();
+}));
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