refactor page update logic

lib/gollum/frontend/app.rb

@@ -58,9 +58,8 @@ module Precious
       wiki = Gollum::Wiki.new(settings.gollum_path)
       page = wiki.page(params[:splat].first)
       name = params[:rename] || page.name
-      format = params[:format].intern
+      update_wiki_page(wiki, page, params[:content], commit_message, 
-
+        name, params[:format])
-      wiki.update_page(page, name, format, params[:content], commit_message)
 
       redirect "/#{CGI.escape(Gollum::Page.cname(name))}"
     end
@@ -160,6 +159,14 @@ module Precious
       end
     end
 
+    def update_wiki_page(wiki, page, content, commit_message, name = nil, format = nil)
+      return if !page
+      return if page.raw_data == content
+      name ||= page.name
+      format = (format || page.format).to_sym
+      wiki.update_page(page, name, format, content, commit_message)
+    end
+
     def commit_message
       { :message => params[:message] }
     end