Require tasks from all gems in a group from a Gemfile

Gemfile

group :engines do
  gem 'my_engine'
  gem 'another_engine'
end

Rakefile

# Needed a way to require rake tasks for any gem in the :engines group

Bundler.definition.dependencies.each do |dep|
  if dep.groups.any?{ |g| g == :engines }
    require "#{dep.name}/tasks"
  end
end