You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: example_spec.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/spec/bundler/plugins/source
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

RSpec.describe "real source plugins" do
  context "with a minimal source plugin" do
    before do
      build_repo2 do

    
              def install_path
                @install_path ||= begin
                  git_scope = "\#{base_name}-\#{shortref_for_path(revision)}"

                  path = gem_install_dir.join(git_scope)

                  if !path.exist? && requires_sudo?
                    user_bundle_path.join(ruby_scope).join(git_scope)
                  else
                    path
                  end