Merge branch 'john_long-composer-package-relative-url' into 'master'

Fix relative URL with composer package

See merge request gitlab-org/gitlab!53918

app/presenters/packages/composer/packages_presenter.rb

@@ -11,7 +11,7 @@ module Packages
       end
 
       def root
-        path = api_v4_group___packages_composer_package_name_path({ id: @group.id, package_name: '%package%$%hash%', format: '.json' }, true)
+        path = expose_path(api_v4_group___packages_composer_package_name_path({ id: @group.id, package_name: '%package%$%hash%', format: '.json' }, true))
         { 'packages' => [], 'provider-includes' => { 'p/%hash%.json' => { 'sha256' => provider_sha } }, 'providers-url' => path }
       end
 

changelogs/unreleased/john_long-composer-package-relative-url.yml

+---
+title: Fix relative URL with composer package
+merge_request: 53918
+author:
+type: fixed

spec/presenters/packages/composer/packages_presenter_spec.rb

@@ -67,10 +67,14 @@ RSpec.describe ::Packages::Composer::PackagesPresenter do
       {
         'packages' => [],
         'provider-includes' => { 'p/%hash%.json' => { 'sha256' => /^\h+$/ } },
-        'providers-url' => "/api/v4/group/#{group.id}/-/packages/composer/%package%$%hash%.json"
+        'providers-url' => "prefix/api/v4/group/#{group.id}/-/packages/composer/%package%$%hash%.json"
       }
     end
 
+    before do
+      stub_config(gitlab: { relative_url_root: 'prefix' })
+    end
+
     it 'returns the provider json' do
       expect(subject).to match(expected_json)
     end