rrs: show link to other distro comparison pages

If other distro comparison package(s) exist for a recipe being shown in
the RRS recipe detail page, link to the page for each package as well as
any extra URLs.

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

TODO

@@ -62,5 +62,3 @@ RRS:
 * We only list recipes that have upgrade info (an earlier design decision) - should we list all?
 * Replace "All" with "(all)" and "No maintainer" with "(no maintainer)"?
 * Link to upstream changelogs? (will require per-recipe variable)
-* Link to other distro comparisons?
-* Link to other distro package info pages?

layerindex/models.py

@@ -465,6 +465,9 @@ class Recipe(models.Model):
             eu = ExtraURL(name=item.name, url=item.render_url(self))
             yield eu
 
+    def comparison_recipes(self):
+        return ClassicRecipe.objects.filter(cover_layerbranch=self.layerbranch).filter(cover_pn=self.pn)
+
     def __str__(self):
         return os.path.join(self.filepath, self.filename)
 

templates/rrs/recipedetail.html

@@ -215,10 +215,21 @@
                 </dd>
                 {% endif %}
 
-                {% if recipe_distros %}
+                {% if recipe_distros or recipe.comparison_recipes.exists %}
                 <dt>Distributions</dt>
                 <dd>
                     <ul class="unstyled">
+                        {% for cr in recipe.comparison_recipes %}
+                        <li><a href="{% url 'comparison_recipe' cr.id %}">{{ cr.layerbranch.branch }} - {{ cr.pn }}</a>
+                            {% if cr.extra_urls %}
+                                <ul>
+                                    {% for extra_url in cr.extra_urls %}
+                                        <li><a href="{{ extra_url.url }}">{{ extra_url.name }}</a></li>
+                                    {% endfor %}
+                                </ul>
+                            {% endif %}
+                        </li>
+                        {% endfor %}
                         {% for d in recipe_distros %}
                         <li>{{ d }}</li>
                         {% endfor %}