class KPM::PluginsManager

def set_active(plugin_name_or_path, plugin_version=nil)
  if plugin_name_or_path.nil?
    @logger.warn('Unable to mark a plugin as active: no name or path specified')
    return
  end
  if plugin_version.nil?
    # Full path specified, with version
    link = Pathname.new(plugin_name_or_path).join('../SET_DEFAULT')
    FileUtils.rm_f(link)
    FileUtils.ln_s(plugin_name_or_path, link, :force => true)
  else
    # Plugin name (fs directory) specified
    plugin_dir_glob = @plugins_dir.join('*').join(plugin_name_or_path)
    # Only one should match (java or ruby plugin)
    Dir.glob(plugin_dir_glob).each do |plugin_dir_path|
      plugin_dir = Pathname.new(plugin_dir_path)
      link = plugin_dir.join('SET_DEFAULT')
      FileUtils.rm_f(link)
      FileUtils.ln_s(plugin_dir.join(plugin_version), link, :force => true)
    end
  end
  update_fs(plugin_name_or_path, plugin_version) do |tmp_dir|
    FileUtils.rm_f(tmp_dir.join('disabled.txt'))
    FileUtils.rm_f(tmp_dir.join('restart.txt'))
  end
end