gulpfile.js

var gulp        = require('gulp');
var browserSync = require('browser-sync');
var sass        = require('gulp-sass');
var prefix      = require('gulp-autoprefixer');

/**
 * Launch the Server
 */
gulp.task('browser-sync', ['sass'], function() {
	browserSync({
		proxy: "localhost:5000"
	});
});

/**
 * Compile files from _scss into both _site/css (for live injecting) and site (for future jekyll builds)
 */
gulp.task('sass', function () {
	return gulp.src('assets/scss/main.scss')
		.pipe(sass({
			includePaths: ['scss'],
			onError: browserSync.notify
		}))
		.pipe(prefix(['last 15 versions', '> 1%', 'ie 8', 'ie 7'], { cascade: true }))
		.pipe(gulp.dest('puzzle/static'))
		.pipe(browserSync.reload({ stream: true }))
});

/**
 * Watch scss files for changes & recompile
 * Watch html/md files, run jekyll & reload BrowserSync
 */
gulp.task('watch', function () {
	gulp.watch('assets/scss/*.scss', ['sass']);
});

/**
 * Default task, running just `gulp` will compile the sass,
 * compile the jekyll site, launch BrowserSync & watch files.
 */
gulp.task('default', ['browser-sync', 'watch']);