A bundler subcommand that uses Git, compare with the previous Gemfile.lock, and display updated gems and compare links.

Add this line to your application's Gemfile:

gem 'bundler-diff'

And then execute:

$ bundle

Or install it yourself as:

$ gem install bundler-diff

Run bundle update as usual:

$ bundle update
Fetching gem metadata from https://rubygems.org
...

Then bundle diff:

$ bundle diff
rake: 11.3.0 => 12.0.0 - https://github.com/ruby/rake/compare/v11.3.0...v12.0.0
rspec: 3.5.0 =>
...

You can see updated gems with compare links.

Options are:

Usage: bundle diff [options]
    -c, --commit COMMIT              Specify a commit
    -f, --format FORMATTER           Choose a formatter
                                       default
                                       md_table
        --escape-json                Escape output as a JSON string
        --access-token ACCESS_TOKEN  Set access token for GitHub API
    -v, --version                    Display the version

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 rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/sinsoku/bundler-diff. 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.