Glad to hear you like it! My idea was to have something very composable and "unix-y", I'm happy to see people using it like that.

I have a a very similar function in my .zshrc ( http://paste.click/s/bGGcnq ) rolled into a single function, though xsel is probably less portable/supported than pbcopy now that I think about it. The last two examples I have bound to Super + S and Super + V, but unfortunately there's no portable and simple way to do that, so I left the config for it out. ( For awesome wm if anyone is curious http://paste.click/s/xydBVJ )