Headless wrapper for ephemeral X servers
For various projects I’m doing right now, I need an easy way to automatically run code in an X server that may not necessarily be the active display. This code may even run on servers in production that don’t have video cards or monitors attached. For some history on this, check out this post on xvfb and firefox. You can solve the problem in that post by simply launching firefox with the tool below, and your X server will exit when firefox exits.