How to use very latest Bundler in Travis

TL;DR: When Bundler has fixes in master that you need, use the specific_install Rubygems plugin to install and use Bundler directly from a git branch. Example¬†Travis YAML configuration excerpt: before_install: – gem update –system – gem install specific_install – gem specific_install https://github.com/bundler/bundler.git I will spend the rest of this post unpacking what the above means. […]