This gem is an implementation of the command pattern, heavily inspired and mirroring the implementation by active_interaction with the major difference being using the dry-rb libraries.


Add this line to your application's Gemfile:

gem 'g2_command'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install g2_command


TODO: Write usage instructions here

RSpec Helper

In spec_helper.rb:

require 'command/test_helper'

RSpec.configure do |config|
  config.include Command::TestHelper

Create a Success outcome object:

  let(:outcome) { create_outcome(value: 'Return value') }

Create a Failure outcome object:

  let(:outcome) { create_outcome(errors: { user: 'is invalid' }) }


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 code of conduct.


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

Code of Conduct

Everyone interacting in the Command project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.