Gulp less basic task

gulpfile.js

/* global require */
'use strict';

var gulp = require('gulp'),
    less = require('gulp-less');

gulp.task('less', function() {
	gulp.src('styles/less/bootstrap.less')
	.pipe(less({
		compress: true
	}))
	.pipe(gulp.dest('styles/compile-gulp/'));
});

gulp.task('default', ['less']);