Gulp uncss

gulp-sitemap-generator.php

<?php

/**
 * Plugin Name: Gulp Sitemap Generator
 * Plugin URI: https://gladdy.uk/blog/2014/04/13/using-uncss-and-grunt-uncss-with-wordpress/
 * Description: Generate a JSON list of every page on a site so it can be used with Gulp and uncss.
 * Author: Liam Gladdy
 * Author URI: http://gladdy.co.uk
 * Version: 1.0
 */

add_action('template_redirect', 'show_sitemap');

function show_sitemap() {
	if (isset($_GET['show_sitemap'])) {

		// Set up an array for all the URLs
		$urls = array();

		// Homepage
		$urls[] = get_site_url();

		// Get all the pages, posts (including CPTs)
		$the_query = new WP_Query(array('post_type' => 'any', 'posts_per_page' => '-1', 'post_status' => 'publish'));

		while ($the_query->have_posts()) {
		  $the_query->the_post();
	  	$urls[] = get_permalink();
		}

		// Authors
		$authors = get_users();
		foreach ($authors as $author) {
			$urls[] = get_author_posts_url( $author->ID );
		}

		// Every term imaginable, even the empty ones (categories, custom taxonomies, tags, etc.)
		$args = array(
			'public' => true,
		);

		$taxonomies = get_taxonomies($args, 'names');

		$args = array('hide_empty=0');

		$terms = get_terms($taxonomies, $args);

		foreach ($terms as $term) {
			$urls[] = get_term_link( $term );
		}

		// Getting a list of Archive URLs seems like it should be easier...probably missing something on the Codex, but this works.

		$args = array(
			'type'            => 'monthly',
			'format'          => 'custom',
			'before'          => '',
			'after'           => '',
			'show_post_count' => false,
			'echo'            => 0
		);

		$archive_links_raw = wp_get_archives($args);

		$archive_links_pattern = "/(?i)\b((?:https?:\/\/|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'\".,<>?«»“”‘’]))/";

		preg_match_all($archive_links_pattern, $archive_links_raw, $cleaned_archive_links);

		$cleaned_archive_links = $cleaned_archive_links[1];

		foreach ($cleaned_archive_links as $cleaned_archive_link) {
			$urls[] = $cleaned_archive_link;
		}

		// Add in a search result page for '.'
		$main_url = get_site_url();
		$urls[] = $main_url . '/?s=.';

		// Force a search with no results
		$urls[] = $main_url . '/?s=asdfasdfasdfasdf';

		// Force a 404 page
		$urls[] = $main_url . '/asdfasdfasdfasdf';

		// Return all of the urls captured above and encode to json for UnCSS

		die(json_encode($urls));

  }

}

gulpfile.js

var gulp = require('gulp'),
    shell = require('gulp-shell'),
    uncss = require('gulp-uncss');

// Generate Sitemap JSON
gulp.task('sitemap', shell.task(['curl --silent --output sitemap.json http://dev.foo.org/\?show_sitemap']));

// Remove Unused CSS (use after running `gulp sitemap`)
gulp.task('uncss', function() {
	return gulp.src('css/style.css')
		.pipe(uncss({
			html: JSON.parse(require('fs').readFileSync('sitemap.json', 'utf-8'))
		}))
		.pipe(gulp.dest('css/clean/'));
});