title: Unix DWG to BMP|JPG|PNG|SVG converter
body: <p>I am building a Ruby on Rails application and I need to display a thumbnail for uploaded .dwg (AutoCad) files. Is there any gem (ideally) or command line Unix library to do this? I had already crawled the entire web and found nothing but licensed Windows GUI interfaces. </p>
  
  <p>I also tried with ImageMagick but it doesn't supports .dgw conversion.</p>
  
  <p>I have a .exe that makes the conversion but I'll need to build a web service running on a Windows server just for this feature, that's why I need the library to run on Unix systems.</p>