How to set up gulp less properly?

Question

Less

Hello. Prompt on gulp-less.
1) What needs to be written so that it does not compile files before which there is _ (for example, _vars.less).
2) To put/leave a line break between

Task selectors:

gulp.task('less', function () {
    return gulp.src(src_path)
        .pipe(less())
        .pipe(gulp.dest('app/css'))
        .pipe(browserSync.reload({stream: true}));
});

Answer 1

solved the first question like this:

const src_path = ['app/less//*.less', '!app/less//_*.less'];

to solve the second question, I used gulp-cssbeautify