Add retrolab support to link generator

Fixes #224

Author: yuvipanda

docs/_static/link_gen/link.js

@@ -80,6 +80,10 @@ var apps = {
         title: 'Classic Notebook',
         generateUrlPath: function (path) { return 'tree/' + path; },
     },
+    retrolab: {
+        title: 'RetroLab',
+        generateUrlPath: function (path) { return 'retro/tree/' + path; },
+    },
     jupyterlab: {
         title: 'JupyterLab',
         generateUrlPath: function (path) { return 'lab/tree/' + path; }

docs/link.rst

@@ -131,6 +131,12 @@ Use the following form to create your own ``nbgitpuller`` links.
                    Classic Jupyter Notebook
                  </label>
                </div>
+               <div class="form-check">
+                 <input class="form-check-input" type="radio" name="app" id="app-retrolab" value="retrolab">
+                 <label class="form-check-label text-dark" for="app-retrolab">
+                   RetroLab
+                 </label>
+               </div>
                <div class="form-check">
                  <input class="form-check-input" type="radio" name="app" id="app-jupyterlab" value="jupyterlab">
                  <label class="form-check-label text-dark" for="app-jupyterlab">