CODEWITHSUNDEEP
ruby-on-railsrubybundler
Alex Smolov
Alex Smolov

Reputation: 1861

What do require 'bundler/setup' and 'Bundler.require' do?

In Rails application, in boot.rb, there is a line:

require 'bundler/setup' if File.exists?(ENV['BUNDLE_GEMFILE'])

In application.rb, there is another line:

Bundler.require(:default, Rails.env)

Could you briefly explain what Rails / Bundler do at require 'bundler/setup' and at 'Bundler.require'?

Is it valid statement, that Bundler is required at bundler/setup and all gems from Gemfile are required at Bundler.require?

Upvotes: 4

Views: 2044

Answers (1)

Gjaldon
Gjaldon

Reputation: 5644

What require 'bundler/setup' does is make Rails automatically discover the Gemfile and then add all the gems defined in it to Ruby's load path.

Bundler.require(:default, Rails.env) will then require all the gems in the Gemfile depending on the current Rails environment. So if current environment is the development environment, Rails will load all gems that are meant to be used in the development environment.

Hope that helps!

Upvotes: 7

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