# File lib/bundler/plugin.rb, line 37
    def install(names, options)
      specs = Installer.new.install(names, options)

      save_plugins names, specs
    rescue PluginError => e
      if specs
        specs_to_delete = Hash[specs.select {|k, _v| names.include?(k) && !index.commands.values.include?(k) }]
        specs_to_delete.values.each {|spec| Bundler.rm_rf(spec.full_gem_path) }
      end

      Bundler.ui.error "Failed to install plugin #{name}: #{e.message}\n  #{e.backtrace.join("\n ")}"
    end