open current category on root page

content_blog/index.mkd

@@ -13,4 +13,4 @@ Feel free to comment or [contact][Contact] me directly. There is an [RSS feed][R
 
 Latest post:
 
-<%= render "content-embed", :item => @site.items_by_date.last %>
+<%= render "content-embed", :item => @site.latest_article %>

content_daily/index.mkd

@@ -11,4 +11,4 @@ Because death doesn't conquer itself, you know.
 
 Latest entry:
 
-<%= render "content-embed", :item => @site.items_by_date.last %>
+<%= render "content-embed", :item => @site.latest_article %>

content_letsread/index.mkd

@@ -6,4 +6,4 @@ no_comments: true
 
 muflax reads stuff and comments on it. Sometimes, quotes out of context.
 
-<%= render "content-embed", :item => @site.items_by_date.last %>
+<%= render "content-embed", :item => @site.latest_article %>

content_sutra/index.mkd

@@ -24,5 +24,5 @@ It's time for a [Bro][PhiloBro]dhisattva to step forward and [reblog][] Buddhist
 
 Thus have I heard:
 
-<%= render "content-embed", :item => @site.items_by_date.last %>
+<%= render "content-embed", :item => @site.latest_article %>
 

layouts/cat-nav.erb

@@ -4,9 +4,9 @@
     <% @site.categories(false).each do |cat| %>
       <li><%= cat.link true %></li>
 
-      <% if @item.category == cat %>
+      <% if @item.category == cat or (@item.root? and @site.latest_category? cat) %>
         <ul>
-          <% @site.items_by_date(@item.category).reverse.each do |i| %>
+          <% @site.items_by_date(cat).reverse.each do |i| %>
             <%= render 'list-item', :item => i, :episteme => false %>
           <% end %>
         </ul>

lib/default.rb

@@ -42,6 +42,10 @@ class Nanoc::Item
       ""
     end
   end
+
+  def root?
+    self.identifier == "/"
+  end
 end
 
 class Category
@@ -132,6 +136,15 @@ class Nanoc::Site
   def categories all=true
     @categories.select{|c| c[:not_empty] or all}.map{|c| c[:cat]}
   end
+
+  def latest_article
+    items_by_date.last
+  end
+
+  # is this category on the main site?
+  def latest_category? cat
+    latest_article.category == cat unless latest_article.nil?
+  end
 end
 
 def category name_or_cat