Track dependencies for archives

Author: mnot

lib/jekyll-archives/archive.rb

@@ -47,6 +47,11 @@ def initialize(site, title, type, posts)
           "layout" => layout
         }
         @content = ""
+        
+       # set up dependencies
+        posts.each do |post|
+          site.regenerator.add_dependency(self.path, post.path)
+        end
       end
 
       # The template of the permalink.