gulpfile-express.js

// Load plugins
var gulp = require('gulp'),
    plugins = require('gulp-load-plugins')({ camelize: true }),
    lr = require('tiny-lr'),
    server = lr();

// Php files
gulp.task('php', function() {
    return gulp.src('./**/*.php')
        .pipe(plugins.livereload(server));
});

// Styles
gulp.task('styles', function() {
  return gulp.src('assets/styles/source/*.scss')
    .pipe(plugins.sass({ style: 'expanded' }))
    .pipe(plugins.autoprefixer('last 2 versions', 'ie 9', 'ios 6', 'android 4'))
    .pipe(gulp.dest('assets/styles/build'))
    .pipe(plugins.minifyCss({ keepSpecialComments: 1 }))
    .pipe(plugins.livereload(server))
    .pipe(gulp.dest('./'))
    .pipe(plugins.notify({ message: 'Styles task complete' }));
});

// Vendor Plugin Scripts
// gulp.task('plugins', function() {
//   return gulp.src(['assets/js/source/plugins.js', 'assets/js/vendor/*.js'])
//     .pipe(plugins.concat('plugins.js'))
//     .pipe(gulp.dest('assets/js/build'))
//     .pipe(plugins.rename({ suffix: '.min' }))
//     .pipe(plugins.uglify())
//     .pipe(plugins.livereload(server))
//     .pipe(gulp.dest('assets/js'))
//     .pipe(plugins.notify({ message: 'Scripts task complete' }));
// });

// Site Scripts
// gulp.task('scripts', function() {
//   return gulp.src(['assets/js/source/*.js', '!assets/js/source/plugins.js'])
//     .pipe(plugins.jshint('.jshintrc'))
//     .pipe(plugins.jshint.reporter('default'))
//     .pipe(plugins.concat('main.js'))
//     .pipe(gulp.dest('assets/js/build'))
//     .pipe(plugins.rename({ suffix: '.min' }))
//     .pipe(plugins.uglify())
//     .pipe(plugins.livereload(server))
//     .pipe(gulp.dest('assets/js'))
//     .pipe(plugins.notify({ message: 'Scripts task complete' }));
// });

// Images
gulp.task('images', function() {
  return gulp.src('assets/images/**/*')
    .pipe(plugins.cache(plugins.imagemin({ optimizationLevel: 7, progressive: true, interlaced: true })))
    .pipe(plugins.livereload(server))
    .pipe(gulp.dest('assets/images'))
    .pipe(plugins.notify({ message: 'Images task complete' }));
});

// Watch
gulp.task('watch', function() {

  // Listen on port 35729
  server.listen(35729, function (err) {
    if (err) {
      return console.log(err)
    };

    // Watch .scss files
    gulp.watch('assets/styles/source/**/*.scss', ['styles']);

    // Watch .js files
    // gulp.watch('assets/js/**/*.js', ['plugins', 'scripts']);

    // Watch image files
    gulp.watch('assets/images/**/*', ['images']);

    // Watch php files
    gulp.watch('./**/*.php', ['php']);
  });

});

// Default task
gulp.task('default', ['styles', 'images', 'watch']);

gulpfile.js

var http = require('http');
var gulp = require('gulp');
var browserify = require('gulp-browserify');
var concat = require('gulp-concat');
var less = require('gulp-less');
var refresh = require('gulp-livereload');
var lr = require('tiny-lr');
var lrserver = lr();
var minifyCSS = require('gulp-minify-css');
var embedlr = require('gulp-embedlr');
var ecstatic = require('ecstatic');
var imagemin = require('gulp-imagemin');

var livereloadport = 35729,
    serverport = 5001;

gulp.task('scripts', function() {
    return gulp.src(['app/src/**/*.js'])
        .pipe(browserify())
        .pipe(concat('dest.js'))
        .pipe(gulp.dest('dist/build'))
        .pipe(refresh(lrserver));
});

gulp.task('styles', function() {
    return gulp.src(['app/css/style.less'])
        .pipe(less())
        .on('error', console.log)
        .pipe(minifyCSS())
        .pipe(gulp.dest('dist/build'))
        .pipe(refresh(lrserver));
});

gulp.task('serve', function() {
  //Set up your static fileserver, which serves files in the build dir
  http.createServer(ecstatic({ root: __dirname + '/dist' })).listen(serverport);

  //Set up your livereload server
  lrserver.listen(livereloadport);
});


gulp.task('html', function() {
    return gulp.src("app/*.html")
        .pipe(embedlr())
        .pipe(gulp.dest('dist/'))
        .pipe(refresh(lrserver));
})

gulp.task('assets', function() {
    return gulp.src("app/assets/**")
        .pipe(imagemin({optimizationLevel: 5}))
        .pipe(gulp.dest('dist/assets/'))
        .pipe(refresh(lrserver));
});

// Requires gulp >=v3.5.0
gulp.task('watch', function () {
    gulp.watch('app/src/**', ['scripts']);
    gulp.watch('app/css/**', ['styles']);
    gulp.watch('app/**/*.html', ['html']);
    gulp.watch('app/assets/**', ['assets']);
});

gulp.task('default', ['scripts', 'styles', 'html', 'assets', 'serve', 'watch']);