loader.py

import os
import json
from sphinx.jinja2glue import BuiltinTemplateLoader

class TemplateLoader(BuiltinTemplateLoader):
    def init(self, builder, theme=None, dirs=None):
        self.piwik_site = builder.config.html_context.get('piwik_site', 0)
        self.language = builder.config.language
        self.builder_name = builder.name
        self.suffix = builder.config.source_suffix
        return super(TemplateLoader, self).init(builder, theme, dirs)

    def render(self, template, context):
        res = super(TemplateLoader, self).render(template, context)
        if template == 'page.html':
            overlay = {
                'base': context['pathto']('./', 1),
                'page': context['pagename'],
                'project': {
                    'name': context['project'],
                    'slug': os.environ['SPHINX_PROJECT_SLUG'],
                    'version': context['version'],
                },
                'default_branch': os.environ['SPHINX_DEFAULT_BRANCH'],
                'builder': self.builder_name,
                'language': self.language,
                'source_suffix': self.suffix,
            }
            res = res.replace(
                '</body>',
                """
<!-- Custom overlay -->
<script type="text/javascript">
var erebot = %(overlay)s;
</script>
<script type="text/javascript" src="%(base)s../../../../erebot-overlay.js"></script>

<!-- Statistics -->
<script type="text/javascript">
  var _paq = _paq || [];
  _paq.push(["setDocumentTitle", document.domain + " / " + document.title]);
  if (document.domain != 'docs.erebot.net') {
      _paq.push(["setCookieDomain", "erebot.github.io"]);
  }
  _paq.push(["setDomains", ["erebot.github.io", "docs.erebot.net"]]);
  _paq.push(['trackPageView']);
  _paq.push(['enableLinkTracking']);
  (function() {
    var u="//stats.erebot.net/";
    _paq.push(['setTrackerUrl', u+'piwik.php']);
    _paq.push(['setSiteId', '%(id)d']);
    var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0];
    g.type='text/javascript'; g.async=true; g.defer=true; g.src=u+'piwik.js'; s.parentNode.insertBefore(g,s);
  })();
</script>
<noscript><p><img src="//stats.erebot.net/piwik.php?idsite=%(id)d" style="border:0;" alt="" /></p></noscript>
</body>""" % {
                'id': self.piwik_site,
                'base': context['pathto']('./', 1),
                'overlay': json.dumps(overlay),
            })
        return res