load_plugins

# File lib/bundler/installer.rb, line 228
    def load_plugins
      Bundler.rubygems.load_plugins

      requested_path_gems = @definition.requested_specs.select {|s| s.source.is_a?(Source::Path) }
      path_plugin_files = requested_path_gems.map do |spec|
        begin
          Bundler.rubygems.spec_matches_for_glob(spec, "rubygems_plugin#{Bundler.rubygems.suffix_pattern}")
        rescue TypeError
          error_message = "#{spec.name} #{spec.version} has an invalid gemspec"
          raise Gem::InvalidSpecificationException, error_message
        end
      end.flatten
      Bundler.rubygems.load_plugin_files(path_plugin_files)
    end