[Q] (Noob) How do you root a one m8 (lollipop)? topic

Hey folks, I have a international european one m8 that runs lollipop. I was wondering if anyone could link me to a recent guide about how to go about rooting it. I know that there's the all in one kit that people used but I went on that thread and it seems unused for some time which gave me doubts about whether it would be recent and work for lollipop. Can someone therefore suggest a more recent guide or tell if the all in one toolkit method still works?

Thanks so much, cheers.