Plugin for merging css selectors(rules) that contain the same URL
$ npm install --save-dev gulp-css-merge-url
var gulp = require('gulp');
var cmu = require('gulp-css-merge-url');
gulp.task('cmu', function () {
return gulp.src('src/file.css')
.pipe(cmu())
.pipe(gulp.dest('dist'));
});MIT © free6k