gemdiff

gemdiff is a command-line utility to find and compare source code repositories associated with ruby gems. It makes it easy to compare source code differences between the current version of a gem in your bundle and the latest version of the gem.

Install

gem install gemdiff

Find

$ gemdiff find arel
http://github.com/rails/arel

Open

$ gemdiff open arel

# opens arel project url in browser

Compare

$ gemdiff compare arel --new=5.0.0 --old=4.0.2

# opens GitHub compare view in browser for difference between versions 4.0.2 and 5.0.0

Outdated

The holy grail:

$ cd /your/ruby/project/using/bundler
$ gemdiff