I am a terrible Dubliner/Historian to admit that I have never been inside the gates of Glasnevin Cemetery, but I have been to the Diggers. Many times. I've closed the Diggers, which isn't hard to do because they don't mess around at closing time. It's a neat little spot and I'm glad you found it! There aren't many pubs like that left in Dublin.
That's really cool to hear! I loved it there! One of the advantages to seeing Dublin with a local is going to all sorts of cool spots like this that I would probably never see or find as a tourist.