Add a link from the Tools drop-down to the RRS if enabled

If the RRS is enabled, then add a link to it in the tools menu. I don't
expect this to be used a lot, but otherwise the only way you'd get there
would be either externally or via the link from the layer detail.

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>

layerindex/context_processors.py

@@ -8,6 +8,7 @@ from layerindex.models import Branch, LayerItem
 from django.contrib.sites.models import Site
 
 def layerindex_context(request):
+    import settings
     site = Site.objects.get_current()
     if site and site.name and site.name != 'example.com':
         site_name = site.name
@@ -17,5 +18,6 @@ def layerindex_context(request):
         'all_branches': Branch.objects.exclude(name='oe-classic').order_by('sort_priority'),
         'unpublished_count': LayerItem.objects.filter(status='N').count(),
         'oe_classic': Branch.objects.filter(name='oe-classic'),
-        'site_name': site_name
+        'site_name': site_name,
+        'rrs_enabled': 'rrs' in settings.INSTALLED_APPS,
     }

templates/base.html

@@ -74,6 +74,9 @@
                             <li><a href="{% url 'duplicates' 'master' %}">Duplicates</a></li>
                             <li><a href="{% url 'update_list' %}">Updates</a></li>
                             <li><a href="{% url 'stats' %}">Statistics</a></li>
+                            {% if rrs_enabled %}
+                            <li><a href="{% url 'rrs_frontpage' %}">Recipe Maintenance</a></li>
+                            {% endif %}
                         </ul>
                     </li>
                     {% endif %}