My gulpfile

gulpfile.js

var gulp = require('gulp');
var csslint = require('gulp-csslint');
var gutil = require('gulp-util');
var csscomb = require('gulp-csscomb');
var prefixer = require('gulp-autoprefixer');
var gettext = require('gulp-angular-gettext');
var pngcrush = require('imagemin-pngcrush');
var plato = require('gulp-plato');
var jshint = require('gulp-jshint');
var check = require('gulp-check');
var imagemin = require('gulp-imagemin');
var changed = require('gulp-changed');
var stripDebug = require('gulp-strip-debug');
var watch = require('gulp-watch');
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');

// this is for gulp chrome extension
module.exports = gulp;

// custom reporter for csshint
var customReporter = function(file) {
  gutil.log(gutil.colors.cyan(file.csslint.errorCount)+' errors in '+gutil.colors.magenta(file.path));
  file.csslint.results.forEach(function(result) {
    gutil.log(result.error.message+gutil.colors.green(' on line '+result.error.line));
  });
};

// analyze css
gulp.task('csshint', function() {
  gulp.src('webapp/css/main.css')
    .pipe(csslint())
    .pipe(csslint.reporter(customReporter));
});

// process csscomb and prexixing to main css file
gulp.task('cssprocess', function () {
    return gulp.src('webapp/shared/css/styles.css')
        .pipe(prefixer([
            'Android 2.3',
            'Android >= 4',
            'Chrome >= 20',
            'Firefox >= 24', 
            'Explorer >= 8',
            'iOS >= 6',
            'Opera >= 12',
            'Safari >= 6']))
		.pipe(csscomb())
        .pipe(gulp.dest('./build/css'));
});

// js analyzer - see reports/index.html after run
gulp.task('plato', function () {
    return gulp.src(['webapp/**/*.js','!./webapp/shared/**'])
        .pipe(plato('report', {
            jshint: {
                options: {
                    strict: true
                }
            },
            complexity: {
                trycatch: true
            }
        }));
});

// js lint
gulp.task('jslint', function() {
  return gulp.src(['./webapp/**/*.js','!./webapp/shared/**'])
    .pipe(jshint())
    .pipe(jshint.reporter('jshint-stylish'));
});

// angular gettex - collect strings for translate
gulp.task('pot', function () {
    return gulp.src(['webapp/views/*.html', 'webapp/**/*.js', '!./webapp/shared/**'])
        .pipe(gettext.extract('template.pot', {}))
        .pipe(gulp.dest('po/'));
});

// angular gettext - compile po files to json
gulp.task('translations', function () {
    return gulp.src('po/**/*.po')
        .pipe(gettext.compile({format: 'json'}))
        .pipe(gulp.dest('webapp/locale/'));
});

// remove debug functions from js(console functions)
gulp.task('stripdebug', function () {
    return gulp.src(['./webapp/**/*.js','!./webapp/shared/**'])
        .pipe(stripDebug())
        .pipe(gulp.dest('./webapp'));
});

// minify images
gulp.task('imagemin', function () {
    return gulp.src('webapp/shared/img/*')
        .pipe(changed('build/img'))
        .pipe(imagemin({
            progressive: true,
            svgoPlugins: [{removeViewBox: false}],
            use: [pngcrush()]
        }))
        .pipe(gulp.dest('build/img'));
});

// search "TODO" comments in all own js file
gulp.task('todo', function () {
  gulp.src(['./webapp/**/*.js','!./webapp/shared/**'])
    .pipe(check(/TODO/))
    .on('error', function (err) {
      gutil.beep();
      gutil.log(gutil.colors.red(err));
    });
});

var vendorscripts = [
    'webapp/shared/vendor/angular.min.js',
    'webapp/shared/vendor/angular-touch.js',
    'webapp/shared/vendor/angular-resource.js',
    'webapp/shared/vendor/angular-route.js',
    'webapp/shared/vendor/angular-gettext.js',
    'webapp/shared/vendor/ng-mobile-menu.min.js',
    'webapp/shared/vendor/jquery-2.1.1.min.js',
    'webapp/shared/vendor/underscore.min.js'
];

gulp.task('vendor', function() {
  gulp.src(vendorscripts)
    .pipe(concat('vendor.js'))
    .pipe(uglify())
    .pipe(gulp.dest('./webapp/shared/vendor'))
});

// default task, who list all the avaiable tasks
gulp.task('default', function() {
    gutil.log(gutil.colors.yellow("ConfCat Webapp futtatható taskok listája"));
    gutil.log(gutil.colors.yellow("----------------------------------------"));
    gutil.log(gutil.colors.green("csshint")+"\t\tCSS kódminőség ellenőrzés");
    gutil.log(gutil.colors.green("cssprocess")+"\t\tCSS prefix és csscomb (build/css)");
    gutil.log(gutil.colors.green("plato")+"\t\tPLATO - js stat generator");
    gutil.log(gutil.colors.green("jslint")+"\t\tJSLint - kódminőség ellenpőrzés");
    gutil.log(gutil.colors.green("vendor")+"\t\tÖsszefűz és tömörít minden vendor scriptet");
    gutil.log(gutil.colors.green("pot")+"\t\t\tAngular gettext - collect");
    gutil.log(gutil.colors.green("translations")+"\t\tAngular gettext fordító po fájlból");
    gutil.log(gutil.colors.green("stripdebug")+"\t\tKiszedi a console metódusokat");
    gutil.log(gutil.colors.green("imagemin")+"\t\tImage Minify (build/img)");
    gutil.log(gutil.colors.green("todo")+"\t\t\tEllenőrzi, maradt-e TODO a js fájlokban");
    gutil.log(gutil.colors.green("watch")+"\t\tJs fájlok változását figyeli (haszontalan)");
});

// sample watch task
gulp.task('watch', function () {
    watch('./webapp/*.js', function (files) {
        gutil.log(gutil.colors.red("változás történt"));
    });
});