Added ‘protected’ label and disabled delete button for tags index/show

app/helpers/tags_helper.rb

@@ -21,4 +21,8 @@ module TagsHelper
 
     html.html_safe
   end
+
+  def protected_tag?(project, tag)
+    project.protected_tag?(tag.name)
+  end
 end

app/views/projects/tags/_tag.html.haml

@@ -6,6 +6,11 @@
       %span.item-title
         = icon('tag')
         = tag.name
+
+    - if protected_tag?(@project, tag)
+      %span.label.label-success
+        protected
+
     - if tag.message.present?
        
       = strip_gpg_signature(tag.message)
@@ -30,5 +35,5 @@
         = icon("pencil")
 
     - if can?(current_user, :admin_project, @project)
-      = link_to namespace_project_tag_path(@project.namespace, @project, tag.name), class: 'btn btn-remove remove-row has-tooltip', title: "Delete tag", method: :delete, data: { confirm: "Deleting the '#{tag.name}' tag cannot be undone. Are you sure?", container: 'body' }, remote: true do
+      = link_to namespace_project_tag_path(@project.namespace, @project, tag.name), class: "btn btn-remove remove-row has-tooltip #{protected_tag?(@project, tag) ? 'disabled' : ''}", title: "Delete tag", method: :delete, data: { confirm: "Deleting the '#{tag.name}' tag cannot be undone. Are you sure?", container: 'body' }, remote: true do
         = icon("trash-o")

app/views/projects/tags/show.html.haml

@@ -7,6 +7,9 @@
     .nav-text
       .title
         %span.item-title= @tag.name
+        - if protected_tag?(@project, @tag)
+          %span.label.label-success
+            protected
       - if @commit
         = render 'projects/branches/commit', commit: @commit, project: @project
       - else
@@ -24,7 +27,7 @@
         = render 'projects/buttons/download', project: @project, ref: @tag.name
       - if can?(current_user, :admin_project, @project)
         .btn-container.controls-item-full
-          = link_to namespace_project_tag_path(@project.namespace, @project, @tag.name), class: 'btn btn-remove remove-row has-tooltip', title: "Delete tag", method: :delete, data: { confirm: "Deleting the '#{@tag.name}' tag cannot be undone. Are you sure?" } do
+          = link_to namespace_project_tag_path(@project.namespace, @project, @tag.name), class: "btn btn-remove remove-row has-tooltip #{protected_tag?(@project, @tag) ? 'disabled' : ''}", title: "Delete tag", method: :delete, data: { confirm: "Deleting the '#{@tag.name}' tag cannot be undone. Are you sure?" } do
             %i.fa.fa-trash-o
 
     - if @tag.message.present?

lib/gitlab/checks/change_access.rb

@@ -80,7 +80,7 @@ module Gitlab
         end
 
         if !user_access.can_push_tag?(@tag_name)
-          return "You are not allowed to create protected tags on this project." #TODO: Wording, it is a specific tag which you don't have access too, not all protected tags which might have different levels
+          return "You are not allowed to create this tag as it is protected."
         end
       end