Options +ExecCGI
DirectoryIndex tulip.rb
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ http://example.com/tulip/tulip.rb/$1 [L,QSA]

<FilesMatch (^\..*|^data|^flavour|^plugin|^tulip\.cfg)>
  order deny,allow
  deny from all
</FilesMatch>