The problem with the more modern stuff is it tends to swell seals and jam things in the pump, no metal would have got down to the injectors, I would drain all then try a start on diesel all you can do, but if it's someone else's fault leave it to them.
Older diesels would be no problem, just refill with diesel and off you go again.
It is possible to completely wreck engines though, luck of the draw a lot of time.
tabetha