Improve dependency proxy feature UI

Hide feature toggle control for non public group. Show user the message
that only public groups are supported for now.
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

ee/app/views/groups/dependency_proxies/show.html.haml

@@ -7,7 +7,8 @@
     - link_start = '<a href="%{url}">'.html_safe % { url: help_page_path('PLACEHOLDER') }
     = s_('Create a local proxy for storing frequently used upstream images. %{link_start}Learn more%{link_end} about dependency proxies.').html_safe % { link_start: link_start, link_end: '</a>'.html_safe }
 
-- if can?(current_user, :admin_group, @group)
+- if @group.public?
+  - if can?(current_user, :admin_group, @group)
     = form_for(@dependency_proxy, method: :put, url: group_dependency_proxy_path(@group)) do |f|
       .form-group
         .js-dependency-proxy-toggle-area
@@ -25,6 +26,9 @@
       .prepend-top-20
         = f.submit 'Save changes', class: 'btn btn-success'
 
-- else
+  - else
     - if @dependency_proxy.enabled
       = render 'groups/dependency_proxies/url'
+- else
+  .alert.alert-info
+    = _('Dependency proxy feature is limited to public groups for now.')

ee/spec/features/groups/dependency_proxy_spec.rb

@@ -16,7 +16,7 @@ describe 'Group Dependency Proxy' do
     stub_licensed_features(dependency_proxy: true)
   end
 
-  describe 'feature settings', :js do
+  describe 'feature settings' do
     context 'when not logged in' do
       it 'does not show the feature settings' do
         visit path
@@ -27,12 +27,13 @@ describe 'Group Dependency Proxy' do
     end
 
     context 'when logged in as group owner' do
+      context 'feature is available', :js do
         before do
           sign_in(owner)
           visit path
         end
 
-      it 'toggle defaults to disabled' do
+        it 'toggles defaults to disabled' do
           page.within('.js-dependency-proxy-toggle-area') do
             expect(find('.js-project-feature-toggle-input', visible: false).value).to eq('false')
           end
@@ -67,18 +68,30 @@ describe 'Group Dependency Proxy' do
               visit path
             end
 
-          it 'does not show the feature toggle' do
+            it 'does not show the feature toggle but shows the proxy URL' do
               expect(page).not_to have_css('.js-dependency-proxy-toggle-area')
-          end
-
-          it 'shows the proxy URL' do
               expect(find('.js-dependency-proxy-url').value).to have_content('/dependency_proxy/containers')
             end
           end
         end
       end
 
-    context 'when feature is not available because of license', js: false do
+      context 'feature is not avaible' do
+        before do
+          sign_in(owner)
+        end
+
+        context 'group is private' do
+          let(:group) { create(:group, :private) }
+
+          it 'informs user that feature is only available for public groups' do
+            visit path
+
+            expect(page).to have_content('Dependency proxy feature is limited to public groups for now.')
+          end
+        end
+
+        context 'feature is not supported by the license' do
           it 'renders 404 page' do
             stub_licensed_features(dependency_proxy: false)
 
@@ -88,7 +101,7 @@ describe 'Group Dependency Proxy' do
           end
         end
 
-    context 'when feature is disabled globally', js: false do
+        context 'feature is disabled globally' do
           it 'renders 404 page' do
             disable_feature
 
@@ -98,6 +111,8 @@ describe 'Group Dependency Proxy' do
           end
         end
       end
+    end
+  end
 
   def enable_feature
     allow(Gitlab.config.dependency_proxy).to receive(:enabled).and_return(true)

locale/gitlab.pot

@@ -3921,6 +3921,9 @@ msgstr ""
 msgid "Dependency proxy URL"
 msgstr ""
 
+msgid "Dependency proxy feature is limited to public groups for now."
+msgstr ""
+
 msgid "DependencyProxy|Toggle Dependency Proxy"
 msgstr ""