switch analytics to using matomo

Author: fmichonneau

_includes/javascript.html

@@ -5,14 +5,27 @@
 <script src="{{ relative_root_path }}/assets/js/bootstrap.min.js"></script>
 <script src="{{ relative_root_path }}/assets/js/lesson.js"></script>
 
+{% if site.kind == "lesson" %}
+<!-- Matomo -->
 <script>
-  (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-  (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-  m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-  })(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
-  ga('create', 'UA-37305346-2', 'auto');
-  ga('send', 'pageview');
+  var _paq = window._paq = window._paq || [];
+  /* tracker methods like "setCustomDimension" should be called before "trackPageView" */
+  _paq.push(["setDocumentTitle", document.domain + "/" + document.title]);
+  _paq.push(["setDomains", ["*.lessons.carpentries.org","*.datacarpentry.github.io","*.datacarpentry.org","*.librarycarpentry.github.io","*.swcarpentry.github.io"]]);
+  _paq.push(["setDoNotTrack", true]);
+  _paq.push(["disableCookies"]);
+  _paq.push(['trackPageView']);
+  _paq.push(['enableLinkTracking']);
+  (function() {
+    var u="https://carpentries.matomo.cloud/";
+    _paq.push(['setTrackerUrl', u+'matomo.php']);
+    _paq.push(['setSiteId', '1']);
+    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
+    g.async=true; g.src='//cdn.matomo.cloud/carpentries.matomo.cloud/matomo.js'; s.parentNode.insertBefore(g,s);
+  })();
 </script>
+<!-- End Matomo Code -->
+{% endif %}
 
 {% if page.math %}
 <script src="{{ relative_root_path }}/assets/js/katex.min.js"></script>