sass-ruby example

gulpfile.js

gulp.task('sass', function () {
    return sass(config.sassPath + '/style.scss',
        {
            style: 'expanded',
            loadPath:[
                './src/sass',
                config.bowerDir + '/bootstrap-sass-official/assets/stylesheets'
               ]})
        .on('error', notify.onError(function (error){
            return "Error: " + error.message;
        }))
        .pipe(gulp.dest('./public/css'));
});

// Rerun the task when a file changes
gulp.task('watch', function() {
    gulp.watch(config.sassPath + '/**/*.scss', ['sass']);
});