Add update check overlay

Author: foosel

_assets/css/site.css

@@ -213,9 +213,11 @@ footer {
 .navbar-search .search-query { line-height: inherit; }
 
 .blacklist-table,
-.notice-table {
+.notice-table,
+.overlay-table {
   .blacklist-plugin,
-  .notice-plugin {
+  .notice-plugin,
+  .overlay-plugin {
     width: 50%;
   }
   .blacklist-versions,

_assets/less/site.less

@@ -0,0 +1,18 @@
+# Update check overlays, in case of maintainer change or a broken config etc. Format:
+#
+#   pluginID:
+#     user: new github user
+#     repo: new github repo
+#     pip: new pip URL
+#     ...
+#
+# Any keys from the software update config can be overwritten, changing the default values. config.yaml on the
+# instances out there still wins though, in case the user has a personal override configured.
+octoprint:
+  user: OctoPrint
+detailedprogress:
+  user: tpmullan
+filamentmanager:
+  user: OllisGit
+klipper:
+  user: AliceGrey

_data/update_check_overlays.yaml

@@ -29,6 +29,7 @@
             <ul class="dropdown-menu">
               <li><a href="{{ '/blacklist/' | prepend: site.baseurl }}">Blacklist</a></li>
               <li><a href="{{ '/notices/' | prepend: site.baseurl }}">Notices</a></li>
+              <li><a href="{{ '/overlays/' | prepend: site.baseurl }}">Overlays</a></li>
             </ul>
           </li>
         </ul>

_includes/navigation.html

@@ -0,0 +1,46 @@
+---
+layout: page
+title: Config overlays
+---
+
+<h2>Update check overlay</h2>
+
+<p>
+    Starting with version 1.5.0 OctoPrint now supports the use of a centralized update check overlay, to allow for
+    setting new software update configs for plugins that e.g. were abandoned by their original maintainer and have been
+    adopted by a new one at a new repository location, or plugins that shipped with a broken default update config.
+</p>
+<p>
+    The overlay is hosted here on <code>plugins.octoprint.org</code> as a <a href="/update_check_overlay.json">JSON file</a>
+    and currently contains the following entries:
+</p>
+<table class="table overlay-table">
+    <thead>
+        <tr>
+            <th class="overlay-plugin">Plugin</th>
+            <th class="overlay-data">Overlay</th>
+        </tr>
+    </thead>
+    <tbody>
+        {% for item in site.data.update_check_overlays %}
+        <tr>
+            <td class="overlay-plugin">
+                {% assign id = item[0] | prepend: "/plugins/" %}
+                {% assign p = site.plugins | where: "id", id | first %}
+                {% if p %}
+                <a href="{{ p.url }}">{{ p.title }}</a>
+                {% else %}
+                <code>{{ item[0] | xml_escape }}</code>
+                {% endif %}
+            </td>
+            <td class="overlay-data">
+                <div class="language-json highlighter-rouge">
+                    <div class="highlight">
+                        <pre class="highlight">{{ item[1] | jsonify }}</pre>
+                    </div>
+                </div>
+            </td>
+        </tr>
+        {% endfor %}
+    </tbody>
+</table>

overlays/index.html

@@ -0,0 +1,4 @@
+---
+layout: null
+---
+{{ site.data.update_check_overlays | jsonify }}