setup.rb in bio-1.5.0

- old
+ new

@@ -3,11 +3,10 @@
 #
 # Copyright::   Copyright (C) 2006
 #               Toshiaki Katayama <k@bioruby.org>
 # License::     The Ruby License
 #
-# $Id: setup.rb,v 1.8 2007/06/28 11:21:40 k Exp $
 #
 
 require 'getoptlong'
 
 class Bio::Shell::Setup
@@ -23,10 +22,10 @@
 
     # load configuration and plugins
     Bio::Shell.configure(savedir)
 
     # set default to irb mode
-    Bio::Shell.cache[:mode] = @mode || :irb
+    Bio::Shell.cache[:mode] = ((defined? @mode) && @mode) || :irb
 
     case Bio::Shell.cache[:mode]
     when :web
       # setup rails server
       Bio::Shell::Web.new