Redmine/app/views/admin/plugins.html.erb

<%= title l(:label_plugins) %>

<% if @plugins.any? %>
<table class="list plugins">
    <% @plugins.each do |plugin| %>
        <tr id="plugin-<%= plugin.id %>" class="<%= cycle('odd', 'even') %>">
        <td class="name"><span class="name"><%= plugin.name %></span>
            <%= content_tag('span', plugin.description, :class => 'description') unless plugin.description.blank? %>
            <%= content_tag('span', link_to(plugin.url, plugin.url), :class => 'url') unless plugin.url.blank? %>
        </td>
        <td class="author"><%= plugin.author_url.blank? ? plugin.author : link_to(plugin.author, plugin.author_url) %></td>
        <td class="version"><span class="icon"><%= plugin.version %></span></td>
        <td class="configure"><%= link_to(l(:button_configure), plugin_settings_path(plugin)) if plugin.configurable? %></td>
        </tr>
    <% end %>
</table>
<p><a href="#" id="check-for-updates"><%= l(:label_check_for_updates) %></a></p>
<% else %>
<p class="nodata"><%= l(:label_no_data) %></p>
<% end %>

<%= javascript_tag do %>
$(document).ready(function(){
  $("#check-for-updates").click(function(e){
    e.preventDefault();
    $.ajax({
      dataType: "jsonp",
      url: "https://www.redmine.org/plugins/check_updates",
      data: <%= raw_json plugin_data_for_updates(@plugins) %>,
      timeout: 3000,
      beforeSend: function(){
        $('#ajax-indicator').show();
      },
      success: function(data){
        $('#ajax-indicator').hide();
        $("table.plugins td.version span").addClass("unknown");
        $.each(data, function(plugin_id, plugin_data){
          var s = $("tr#plugin-"+plugin_id+" td.version span");
          s.removeClass("icon-ok icon-warning unknown");
          if (plugin_data.url) {
            if (s.parent("a").length>0) {
              s.unwrap();
            }
            s.addClass("found");
            s.wrap($("<a></a>").attr("href", plugin_data.url).attr("target", "_blank"));
          }
          if (plugin_data.c == s.text()) {
            s.addClass("icon-ok");
          } else if (plugin_data.c) {
            s.addClass("icon-warning");
            s.attr("title", "<%= escape_javascript l(:label_latest_compatible_version) %>: "+plugin_data.c);
          }
        });
        $("table.plugins td.version span.unknown").addClass("icon-help").attr("title", "<%= escape_javascript l(:label_unknown_plugin) %>");
      },
      error: function(){
        $('#ajax-indicator').hide();
        alert("Unable to retrieve plugin informations from www.redmine.org");
      }
    });
  });
});
<% end if @plugins.any? %>