Add dependency proxy image prefix to group type

Add dependency_proxy_image_prefix attribute
to graphql group type.

Changelog: added

app/graphql/types/group_type.rb

@@ -158,6 +158,11 @@ module Types
           null: false,
           description: 'Total size of the dependency proxy cached images.'
 
+    field :dependency_proxy_image_prefix,
+          GraphQL::Types::String,
+          null: false,
+          description: 'Prefix for pulling images when using the dependency proxy.'
+
     def label(title:)
       BatchLoader::GraphQL.for(title).batch(key: group) do |titles, loader, args|
         LabelsFinder

app/helpers/groups_helper.rb

@@ -25,15 +25,6 @@ module GroupsHelper
     Ability.allowed?(current_user, :admin_group_member, group)
   end
 
-  def group_dependency_proxy_image_prefix(group)
-    # The namespace path can include uppercase letters, which
-    # Docker doesn't allow. The proxy expects it to be downcased.
-    url = "#{group_url(group).downcase}#{DependencyProxy::URL_SUFFIX}"
-
-    # Docker images do not include the protocol
-    url.partition('//').last
-  end
-
   def group_icon_url(group, options = {})
     if group.is_a?(String)
       group = Group.find_by_full_path(group)

app/models/group.rb

@@ -261,6 +261,15 @@ class Group < Namespace
     Gitlab::UrlBuilder.build(self, only_path: only_path)
   end
 
+  def dependency_proxy_image_prefix
+    # The namespace path can include uppercase letters, which
+    # Docker doesn't allow. The proxy expects it to be downcased.
+    url = "#{web_url.downcase}#{DependencyProxy::URL_SUFFIX}"
+
+    # Docker images do not include the protocol
+    url.partition('//').last
+  end
+
   def human_name
     full_name
   end

app/views/groups/dependency_proxies/_url.html.haml

-- proxy_url = group_dependency_proxy_image_prefix(@group)
+- proxy_url = @group.dependency_proxy_image_prefix
 
 %h5.prepend-top-20= _('Dependency proxy image prefix')
 

doc/api/graphql/reference/index.md

@@ -9758,6 +9758,7 @@ four standard [pagination arguments](#connection-pagination-arguments):
 | <a id="groupdependencyproxyblobcount"></a>`dependencyProxyBlobCount` | [`Int!`](#int) | Number of dependency proxy blobs cached in the group. |
 | <a id="groupdependencyproxyblobs"></a>`dependencyProxyBlobs` | [`DependencyProxyBlobConnection`](#dependencyproxyblobconnection) | Dependency Proxy blobs. (see [Connections](#connections)) |
 | <a id="groupdependencyproxyimagecount"></a>`dependencyProxyImageCount` | [`Int!`](#int) | Number of dependency proxy images cached in the group. |
+| <a id="groupdependencyproxyimageprefix"></a>`dependencyProxyImagePrefix` | [`String!`](#string) | Prefix for pulling images when using the dependency proxy. |
 | <a id="groupdependencyproxymanifests"></a>`dependencyProxyManifests` | [`DependencyProxyManifestConnection`](#dependencyproxymanifestconnection) | Dependency Proxy manifests. (see [Connections](#connections)) |
 | <a id="groupdependencyproxysetting"></a>`dependencyProxySetting` | [`DependencyProxySetting`](#dependencyproxysetting) | Dependency Proxy settings for the group. |
 | <a id="groupdependencyproxytotalsize"></a>`dependencyProxyTotalSize` | [`String!`](#string) | Total size of the dependency proxy cached images. |

spec/graphql/types/group_type_spec.rb

@@ -21,7 +21,8 @@ RSpec.describe GitlabSchema.types['Group'] do
       packages dependency_proxy_setting dependency_proxy_manifests
       dependency_proxy_blobs dependency_proxy_image_count
       dependency_proxy_blob_count dependency_proxy_total_size
-      shared_runners_setting timelogs organizations
+      dependency_proxy_image_prefix shared_runners_setting
+      timelogs organizations
     ]
 
     expect(described_class).to include_graphql_fields(*expected_fields)

spec/helpers/groups_helper_spec.rb

@@ -19,18 +19,6 @@ RSpec.describe GroupsHelper do
     end
   end
 
-  describe '#group_dependency_proxy_image_prefix' do
-    let_it_be(:group) { build_stubbed(:group, path: 'GroupWithUPPERcaseLetters') }
-
-    it 'converts uppercase letters to lowercase' do
-      expect(group_dependency_proxy_image_prefix(group)).to end_with("/groupwithuppercaseletters#{DependencyProxy::URL_SUFFIX}")
-    end
-
-    it 'removes the protocol' do
-      expect(group_dependency_proxy_image_prefix(group)).not_to include('http')
-    end
-  end
-
   describe '#group_lfs_status' do
     let_it_be_with_reload(:group) { create(:group) }
     let_it_be_with_reload(:project) { create(:project, namespace_id: group.id) }

spec/models/group_spec.rb

@@ -2715,4 +2715,16 @@ RSpec.describe Group do
       group.open_merge_requests_count
     end
   end
+
+  describe '#dependency_proxy_image_prefix' do
+    let_it_be(:group) { build_stubbed(:group, path: 'GroupWithUPPERcaseLetters') }
+
+    it 'converts uppercase letters to lowercase' do
+      expect(group.dependency_proxy_image_prefix).to end_with("/groupwithuppercaseletters#{DependencyProxy::URL_SUFFIX}")
+    end
+
+    it 'removes the protocol' do
+      expect(group.dependency_proxy_image_prefix).not_to include('http')
+    end
+  end
 end