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}/"
@@ -624,26 +625,42 @@ module Precious
       end
     end
 
-    def show_page_or_file(fullpath)
-      wiki = wiki_new
-      if page = wiki.page(fullpath)
-        @page          = page
-        @name          = page.filename_stripped
-        @content       = page.formatted_data
-        @upload_dest   = find_upload_dest(Pathname.new(fullpath).cleanpath.to_s)
+    def folder_exists(path, wiki)
+      paths = wiki.tree_list
+      return paths.any? { |item| item.path.start_with?(path) }
+    end
 
-        # Extensions and layout data
-        @editable      = true
-        @toc_content   = wiki.universal_toc ? @page.toc_data : nil
-        @h1_title      = wiki.h1_title
-        @bar_side      = wiki.bar_side
-        @allow_uploads = wiki.allow_uploads
-        @navbar        = true
-        mustache :page
+    def show_page(page, fullpath, wiki)
+      @page          = page
+      @name          = page.filename_stripped
+      @content       = page.formatted_data
+      @upload_dest   = find_upload_dest(Pathname.new(fullpath).cleanpath.to_s)
+
+      # Extensions and layout data
+      @editable      = true
+      @toc_content   = wiki.universal_toc ? @page.toc_data : nil
+      @h1_title      = wiki.h1_title
+      @bar_side      = wiki.bar_side
+      @allow_uploads = wiki.allow_uploads
+      @navbar        = true
+      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