gulpfile.js

var gulp = require('gulp'),
zip = require('gulp-zip'),
watch = require('gulp-watch'),
jshint = require('gulp-jshint'),
gp_concat = require('gulp-concat'),
gp_uglify = require('gulp-uglify'),
imageop = require('gulp-image-optimization'),
minifyHTML = require('gulp-minify-html'),
rename = require('gulp-rename');

// All your paths for JS, HTML and Image files
var zip_files = ['game.js', 'index.html'], // Files to be added to the zip folder use "<directory goes here>/*" for all files inside the directory
    js_files = ['js/main.js', 'scenes/*'], // All your JS files to be combined and minified
    img_files = ['assets/*.png','assets/*.jpg','assets/*.gif','assets/*.jpeg', 'assets/**/*.png','assets/**/*.jpg','assets/**/*.gif','assets/**/*.jpeg'];
    
//Zip up the JS/HTML required for the game
gulp.task('zip', function () {
    return gulp.src(zip_files, {base: "."})
        .pipe(zip('game.zip'))
        .pipe(gulp.dest('build'));
});


//Run this task once the game is ready to ship!
gulp.task('publish', ['build-js', 'build-html', 'zip']);

//Compress Images
//Todo: Test to see if it'll override images
gulp.task('images', function(cb) {
    gulp.src(img_files).pipe(imageop({
        optimizationLevel: 5,
        progressive: true,
        interlaced: true
    })).pipe(gulp.dest('build/assets')).on('end', cb).on('error', cb);
});

//Minify the HTML
gulp.task('build-html', function() { 
  return gulp.src('./index.unmin.html')
    .pipe(minifyHTML())
    .pipe(rename('index.html'))
    .pipe(gulp.dest('./build/'));
});

//Build the JS and minify
gulp.task('build-js', function() {
    return gulp.src(js_files)
        .pipe(jshint())
        .pipe(jshint.reporter('default'))
        .pipe(gp_uglify())
        .pipe(gp_concat('game.js'))
        .pipe(gulp.dest('./build/'));
});

//Build the JS without minifying
gulp.task('build-dev', function() {
    return gulp.src(js_files)
        .pipe(jshint())
        .pipe(jshint.reporter('default'))
        .pipe(gp_concat('game.js'))
        .pipe(gulp.dest('./build/'));
});

//Watch Task
gulp.task('watch', function() {
    gulp.watch('./index.unmin.html', ['build-html']);
    gulp.watch(js_files, ['build-dev']);
    gulp.watch(img_files, ['images']);
});

//Default Task
gulp.task('default', ['build-html', 'build-dev', 'images']);


//Legacy 'build' alias for build-dev task
gulp.task('build', ['build-dev']);