Gulpy di gulp.

gistfile1.txt

var gulp = require( 'gulp'),

    concat = require('gulp-concat'),
    notify = require('gulp-notify'),

    imagemin = require('gulp-imagemin'),

    less = require('gulp-less'),
    prefixer = require('gulp-autoprefixer'),
    minify = require('gulp-minify-css'),

    uglify = require('gulp-uglify'),

    livereload = require('gulp-livereload'),
    lr = require('tiny-lr'),
    server = lr();

gulp.task('img', function() {
    return gulp.src('public/dev/img/*')
        .pipe(imagemin({optimizationLevel: 5}))
        .pipe(gulp.dest('public/dist/img'))
        .pipe(notify('Gulp: images processed.'));
});

gulp.task('css', function() {
    return gulp.src('public/dev/*.less')
        .pipe(less())
        .pipe(prefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1', 'ios 6', 'android 4'))
        .pipe(minify())
        .pipe(gulp.dest('public/dist/css'))
        .pipe(livereload(server))
        .pipe(notify('Gulp: CSS processed.'));
});

gulp.task('js', function() {
    return gulp.src('public/dev/*.js')
        .pipe(concat('main.js'))
        .pipe(uglify())
        .pipe(gulp.dest('public/dist/js'))
        .pipe(livereload(server))
        .pipe(notify('Gulp: js processed.'));
});

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

    // Watch for images
    gulp.watch('public/dev/img/**/*', ['img']);

    server.listen(35729, function (err) {
        if (err) return console.log(err);

        // Watch for *.less files
        gulp.watch('public/dev/*.less', ['css']);

        // Watch for *.js files
        gulp.watch('public/dev/*.js', ['js']);
    });
});