Just a personal backup of my MacBook's setup. Certainly not a drop-in solution for anybody's machine except my own, but maybe a few lines will prove useful to you.
(...in other words, after stealing so many sick bash hacks from people on here who are much smarter than me, I felt obligated to keep the repo public. And in even more words, use the automated scripts at your own risk!)
Designed for macOS, also works on Linux (specifially Debian and Ubuntu):
git clone git@github.com:filoupegase/dotfiles.git ~/.dotfiles
cd ~/.dotfiles
./install.sh