bundle-only

This gem provides a bundle-only command that installs a set of gems listed in specified Gemfile group. Gems are always installed into the system and Gemfile.lock is never updated by this command. Though, Gemfile.lock is taken into account.

Just call bundle-only mygroup and all gems from group :mygroup at your Gemfile will be installed.

This command is designed to be used instead of calling bundle install --without default development another_group all_not_needed_groups_here and cleaning .bundle/config afterwards (because bundler's --without is a remembered option).

bundle-only is easy to use, does not pollute you bundler configs or augment Gemfile.lock, while allowing you to keep all your dependencies versioned in one place.

You can install any group from your Gemfile:

group :development do
  ...
end

# You can create a separate group
group :special do
  gem 'rubocop'
end

$ bundle-only special
Fetching gem metadata from https://rubygems.org/...........
Fetching version metadata from https://rubygems.org/..
Resolving dependencies...
Using ast 2.2.0
Using bundler 1.11.2
Using powerpack 0.1.1
Using rainbow 2.0.0
Using ruby-progressbar 1.7.5
Using parser 2.3.0.1
Using rubocop 0.36.0
Bundle complete! 5 Gemfile dependencies, 7 gems now installed.
Gems in the groups default and development were not installed.

Other example:

group :development do
  ...
end

# It will also work if gem is included in multiple groups
group :test, :special do
  gem 'rubocop'
end

group :test do
  ...
end

$ bundle-only special
Fetching gem metadata from https://rubygems.org/...........
Fetching version metadata from https://rubygems.org/..
Resolving dependencies...
Using ast 2.2.0
Using bundler 1.11.2
Using powerpack 0.1.1
Using rainbow 2.0.0
Using ruby-progressbar 1.7.5
Using parser 2.3.0.1
Using rubocop 0.36.0
Bundle complete! 5 Gemfile dependencies, 7 gems now installed.
Gems in the groups default, development and test were not installed.

Notice test group is not installed here, but special group gems are still installed. You can't have that with bundler's --with option and optional groups.

Add this line to your application's Gemfile:

gem 'bundle-only'

And then execute:

bundle

Or install it yourself as:

gem install bundle-only

Bug reports and pull requests are welcome on GitHub at https://github.com/MOZGIII/bundle-only.