Conan Skeleton API

The initial structure for the Conan API endpoints
is set up to allow for future API development.

ee/lib/api/conan_packages.rb

+# frozen_string_literal: true
+module API
+  class ConanPackages < Grape::API
+    before do
+      not_found! unless Feature.enabled?(:conan_package_registry)
+    end
+
+    helpers ::API::Helpers::PackagesHelpers
+
+    before do
+      require_packages_enabled!
+      require_conan_authentication!
+    end
+
+    desc 'Ping the Conan API' do
+      detail 'This feature was introduced in GitLab 12.2'
+    end
+    get 'packages/conan/v1/ping' do
+      nil
+    end
+  end
+end

ee/lib/api/helpers/packages_helpers.rb

@@ -23,6 +23,12 @@ module API
       def authorize_destroy_package!
         authorize!(:destroy_package, user_project)
       end
+
+      def require_conan_authentication!
+        # TODO: implement Conan server authentication
+        # To be implemented in https://gitlab.com/gitlab-org/gitlab-ee/issues/12568
+        unauthorized!
+      end
     end
   end
 end

ee/lib/ee/api/endpoints.rb

@@ -23,6 +23,7 @@ module EE
         mount ::API::License
         mount ::API::ProjectMirror
         mount ::API::ProjectPushRule
+        mount ::API::ConanPackages
         mount ::API::MavenPackages
         mount ::API::NpmPackages
         mount ::API::Packages

ee/spec/requests/api/conan_packages_spec.rb

+# frozen_string_literal: true
+require 'spec_helper'
+
+describe API::ConanPackages do
+  set(:guest) { create(:user) }
+  let(:api_user) { guest }
+
+  before do
+    stub_licensed_features(packages: true)
+  end
+
+  describe 'GET /api/v4/packages/conan/v1/ping' do
+    let(:url) { '/packages/conan/v1/ping' }
+
+    subject { get api(url, api_user) }
+
+    context 'feature flag disabled' do
+      before do
+        stub_feature_flags(conan_package_registry: false)
+      end
+
+      it 'returns not found' do
+        subject
+
+        expect(response).to have_gitlab_http_status(404)
+      end
+    end
+
+    context 'feature flag enabled' do
+      it 'rejects with no authorization' do
+        subject
+
+        expect(response).to have_gitlab_http_status(401)
+      end
+
+      context 'packages feature disabled' do
+        it 'fails' do
+          stub_packages_setting(enabled: false)
+          subject
+
+          expect(response).to have_gitlab_http_status(404)
+        end
+      end
+    end
+  end
+end

ee/spec/support/helpers/ee/stub_configuration.rb

@@ -37,5 +37,9 @@ module EE
     def stub_elasticsearch_setting(messages)
       allow(::Gitlab.config.elasticsearch).to receive_messages(to_settings(messages))
     end
+
+    def stub_packages_setting(messages)
+      allow(::Gitlab.config.packages).to receive_messages(to_settings(messages))
+    end
   end
 end