gulpfile.js

var gulp = require('gulp');
var less = require('gulp-less');
var autoprefixer = require('gulp-autoprefixer');
var minifycss = require('gulp-minify-css');
var rename = require('gulp-rename');
var notify = require('gulp-notify');
var watch = require('gulp-watch');
var sourcemaps = require('gulp-sourcemaps');
var livereload = require('gulp-livereload');
//var gulpkss = require('gulp-kss');
//var gulpconcat = require('gulp-concat');

/**
* Gulp errors
*/
function swallowError (error) {
    console.log(error.toString());
    this.emit('end');
}

/**
* Task watch
*/
gulp.task('watch', function () {
    livereload.listen();
    gulp.watch(['less/**/*.less', 'less/**/*.css'], ['styles']);
});

/**
* Task styles: errors, autoprefixer, minified, rename, sourcemap and notify
*/
gulp.task('styles', function () {
    var less_src_import = 'less/reticulas.less';
    var less_dest_folder = 'dist/';

    return gulp.src(less_src_import)
        .pipe(less())
        .on('error', swallowError)
        .pipe(autoprefixer('last 2 version', 'safari 5', 'ie 8', 'ie 9', 'opera 12.1'))
        .pipe(minifycss({keepSpecialComments: 0}))
        .pipe(sourcemaps.init())
            .pipe(rename({suffix: '.min'}))
        .pipe(sourcemaps.write("./"))
        .pipe(gulp.dest(less_dest_folder))
        .pipe(notify("Less compiled, prefixed and minified"))
        .pipe(livereload())
});