Add H5BP GA snippet

README.md

@@ -56,6 +56,15 @@ Enable Soil's nice search (`/search/query/`) with:
 add_theme_support('soil-nice-search');
 ```
 
+### Google Analytics
+
+Enable HTML5 Boilerplate's Google Analytics snippet
+
+```php
+add_theme_support('soil-google-analytics');
+define('GOOGLE_ANALYTICS_ID','UA-XXXXXX');
+```
+
 ### JS to Footer
 
 Move all scripts to `wp_footer` action hook with:

modules/google-analytics.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Roots\Soil\GoogleAnalytics;
+
+/**
+ * Google Analytics snippet from HTML5 Boilerplate
+ *
+ * Cookie domain is 'auto' configured. See: http://goo.gl/VUCHKM
+ * You can enable/disable this feature in functions.php (or lib/config.php if you're using Sage):
+ * add_theme_support('soil-google-analytics');
+ * define('GOOGLE_ANALYTICS_ID','UA-XXXXXX');
+ */
+function google_analytics() {
+  $logToConsole = (defined('WP_ENV') && WP_ENV !== 'production') || current_user_can('manage_options');
+  ?>
+  <script>
+    <?php if ($logToConsole) : ?>
+      function ga() {if (window.console) {console.log('Google Analytics: ' + [].slice.call(arguments));}}
+    <?php else : ?>
+      (function(b,o,i,l,e,r){b.GoogleAnalyticsObject=l;b[l]||(b[l]=
+        function(){(b[l].q=b[l].q||[]).push(arguments)});b[l].l=+new Date;
+        e=o.createElement(i);r=o.getElementsByTagName(i)[0];
+        e.src='//www.google-analytics.com/analytics.js';
+        r.parentNode.insertBefore(e,r)}(window,document,'script','ga'));
+    <?php endif; ?>
+      ga('create','<?= GOOGLE_ANALYTICS_ID; ?>','auto');ga('send','pageview');
+  </script>
+  <?php
+}
+
+// This is in 'init' action to give user time to define GOOGLE_ANALYTICS_ID
+add_action('init', function () {
+  if (defined('GOOGLE_ANALYTICS_ID')) {
+    add_action('wp_footer', __NAMESPACE__ . '\\google_analytics', 20);
+  }
+}, 20);