Do you have git repositories as dependencies in your Gemfile? Do you have no idea what exactly changed after running bundle update?

Don't despair, the solution is here!

It's easy!

gem install git-bundlecompare

Update your Gemfile as usual

$ bundle update

Open the GitHub compare view for every changed repository in your browser

$ git bundlecompare

Commit (or revert) your changes as usual

$ git commit -a

• Code: git clone http://github.com/MSch/git-bundlecompare
• Bugs: http://github.com/MSch/git-bundlecompare/issues
• Gems: http://rubygems.org/gems/git-bundlecompare