Change path lookup to support abrev paths

lib/gollum/app.rb

@@ -560,6 +560,7 @@ module Precious
         wiki         = wiki_new
         @results     = wiki.tree_list
 
+
         if path
           @path = Pathname.new(path).cleanpath.to_s
           check_path   = wiki.page_file_dir ? ::File.join(wiki.page_file_dir, @path, '/') : "#{@path}/"
@@ -624,9 +625,12 @@ module Precious
       end
     end
 
-    def show_page_or_file(fullpath)
+    def folder_exists(path, wiki)
-      wiki = wiki_new
+      paths = wiki.tree_list
-      if page = wiki.page(fullpath)
+      return paths.any? { |item| item.path.start_with?(path) }
+    end
+
+    def show_page(page, fullpath, wiki)
       @page          = page
       @name          = page.filename_stripped
       @content       = page.formatted_data
@@ -639,11 +643,24 @@ module Precious
       @bar_side      = wiki.bar_side
       @allow_uploads = wiki.allow_uploads
       @navbar        = true
-        mustache :page
+      return mustache :page
+    end
+
+    def show_page_or_file(fullpath)
+      wiki  = wiki_new
+
+      if fullpath[-1] != '/' ? page = wiki.page(fullpath) : false
+        show_page(page, fullpath, wiki)
+      elsif page = wiki.page("#{fullpath}/#{wiki.index_page}")
+        show_page(page, fullpath, wiki)
+      elsif page = wiki.page("#{fullpath}/#{File.basename(fullpath)}")
+        show_page(page, fullpath, wiki)
       elsif file = wiki.file(fullpath, wiki.ref, true)
         show_file(file)
       elsif @redirects_enabled && redirect_path = wiki.redirects[fullpath]
         redirect to("#{encodeURIComponent(redirect_path)}?redirected_from=#{encodeURIComponent(fullpath)}")
+      elsif folder_exists(fullpath, wiki)
+        redirect to("/gollum/overview/#{clean_url(encodeURIComponent(fullpath))}")
       else
         if @allow_editing && @user_authed
           path = fullpath[-1] == '/' ? "#{fullpath}#{wiki.index_page}" : fullpath # Append default index page if no page name is supplied