Is it possible to override gemfile for local development?

Question

We have a Gemfile currently in our git repository. However, there\'s a gem I use only locally in my environment (my team doesn\'t use it). In order to use it, I

Answer 1

Put below code at the top of your Gemfile.local to load existing gemfile:

if File.exists?('Gemfile') then
  eval File.read('Gemfile')
end

It will load all gems from existing Gemfile. You can add new gems also as you need.

Run below commands to install gems from new Gemfile.local:

bundle install --gemfile=Gemfile.local

Answer 2

Set BUNDLE_GEMFILE environment variable:

BUNDLE_GEMFILE=Gemfile.local bundle exec rails c

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To provide a “delta” only in the Gemfile.local put require_relative 'Gemfile' on top of it (or Bundler::Dsl#eval_gemfile as suggested by @MichaelKohl in comments.)