Show functionality only for users with the ability to edit labels

app/views/projects/labels/index.html.haml

 - page_title "Labels"
+- hide_class = ''
 
 .top-area
   .nav-text
@@ -10,19 +11,20 @@
         New label
 
 .labels
-  - hide_class = ''
-  -# Only show it in the first page
-  - if (params[:page].present? and params[:page] != '1') or @project.labels.blank? or (params[:page] == nil and @project.labels.blank?)
-    - hide_class = 'hide'
-  .prioritized-labels{ class: hide_class }
-    %h5 Prioritized Labels
-    %ul.content-list.manage-labels-list.js-prioritized-labels{ "data-url" => set_priorities_namespace_project_labels_path(@project.namespace, @project) }
-      - if @prioritized_labels.present?
-        = render @prioritized_labels
-      - else
-        %p.empty-message No prioritized labels yet
+  - if can?(current_user, :admin_label, @project)
+    -# Only show it in the first page
+    - if (params[:page].present? and params[:page] != '1') or @project.labels.blank? or (params[:page] == nil and @project.labels.blank?)
+      - hide_class = 'hide'
+    .prioritized-labels{ class: hide_class }
+      %h5 Prioritized Labels
+      %ul.content-list.manage-labels-list.js-prioritized-labels{ "data-url" => set_priorities_namespace_project_labels_path(@project.namespace, @project) }
+        - if @prioritized_labels.present?
+          = render @prioritized_labels
+        - else
+          %p.empty-message No prioritized labels yet
   .other-labels
-    %h5{ class: hide_class } Other Labels
+    - if can?(current_user, :admin_label, @project)
+      %h5{ class: hide_class } Other Labels
     - if @labels.present?
       %ul.content-list.manage-labels-list.js-other-labels
         = render @labels

app/views/shared/_label_row.html.haml

 %span.label-row
-  .js-toggle-priority.toggle-priority{ data: { url: remove_priority_namespace_project_label_path(@project.namespace, @project, label),
-    dom_id: dom_id(label) } }
-    %button.add-priority.btn.has-tooltip{ title: 'Prioritize', :'data-placement' => 'top' }
-      = icon('star-o')
-    %button.remove-priority.btn.has-tooltip{ title: 'Remove priority', :'data-placement' => 'top' }
-      = icon('star')
+  - if can? current_user, :admin_label, @project
+    .js-toggle-priority.toggle-priority{ data: { url: remove_priority_namespace_project_label_path(@project.namespace, @project, label),
+      dom_id: dom_id(label) } }
+      %button.add-priority.btn.has-tooltip{ title: 'Prioritize', :'data-placement' => 'top' }
+        = icon('star-o')
+      %button.remove-priority.btn.has-tooltip{ title: 'Remove priority', :'data-placement' => 'top' }
+        = icon('star')
   %span.label-name
     = link_to_label(label, tooltip: false)
   %span.prepend-left-10