class Bundler::GemHelper

def install_gem(built_gem_path=nil)
  built_gem_path ||= build_gem
  out, _ = sh_with_code("gem install '#{built_gem_path}' --local")
  raise "Couldn't install gem, run `gem install #{built_gem_path}' for more detailed output" unless out[/Successfully installed/]
  Bundler.ui.confirm "#{name} (#{version}) installed."
end