Compare Linker

Travis Status License Gem


Create GitHub's compare view URLs for pull request from diff of Gemfile.lock (and post comment to pull request).

screen shot 2016-10-09 at 7 53 23 pm

GitHub Compare View rocks.But diff of Gemfile.lock sucks. So I made Compare Linker.


Add this line to your application's Gemfile:

gem 'compare_linker'

And then execute:

$ bundle

Or install it yourself as:

$ gem install compare_linker


require 'compare_linker'


compare_linker ='masutaka/compare_linker', '17')
compare_linker.formatter =
comment = compare_linker.make_compare_links.to_a.join("\n")
compare_linker.add_comment('masutaka/compare_linker', '17', comment)

GitHub Enterprise

In addition to OCTOKIT_ACCESS_TOKEN, set the following environment variables.



After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.