sites/tasks/minify-css.js
'use strict';
var gulp = require('gulp');
var minifyCSS = require('gulp-clean-css');
gulp.task('minify-css', ['build-less'], function () {
return gulp.src("./build/apps/css/**/*.css")
.pipe(minifyCSS({
keepBreaks: true,
keepSpecialComments: true,
processImport: false
}))
.pipe(gulp.dest("./build/minified/css"));
});