I use a shell script for a new debian[0] installation and also have other scripts for kubuntu[1], opensuse[2] and other software installations. I store my dotfiles[3] and other useful scripts that I can customize for each development environment. Hope that helps!
Just wanted to compliment you on the documentation in those scripts. I'm that documentation stickler guy at work, so seeing it in the wild (especially for personal files) makes my day.
[0] https://github.com/svaksha/yaksha/blob/master/yksh/apt-debia...
[1] https://github.com/svaksha/yaksha#2-folders
[2] https://github.com/svaksha/yaksha/tree/master/yksh
[3] https://github.com/svaksha/yaksha/tree/master/home