How can I get gedit ready for programming in Ruby and Ruby on Rails?
Solution 1:
simply
sudo apt-add-repository ppa:ubuntu-on-rails/ppa
sudo apt-get update
sudo apt-get install gedit-gmate
and activate the plugins you want from options menu. It will activate sintax highlighting for erb files and many snippets for RoR developing.
Solution 2:
Some more hints can be found here: https://rbjl.janlelis.com/22-rubybuntu-4-make-gedit-better-than-any-ide. Some commands for the "external commands" plugin (e.g. "run in irb") can be found in this post: https://rbjl.janlelis.com/23-gedit-external-tools-ruby-helpers-git-integration-and-more
2020 Update: As Crimbo noted, this might be outdated now...