Pass variables from deployment project services to CI runnerexpose-deployment-variables

This commit introduces the concept of deployment variables - variables
that are collected from deployment services and passed to CI runner
during a deployment build.
Deployment services specify the variables by overriding
"predefined_variables" method.

This commit also configures variables for KubernetesService

1 files changed, 20 insertions, 0 deletions

diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
index 21ff238841e..c7d914a81f9 100644
--- a/spec/models/project_spec.rb
+++ b/spec/models/project_spec.rb
@@ -1696,6 +1696,26 @@ describe Project, models: true do
     end
   end
 
+  describe '#deployment_variables' do
+    context 'when project has no deployment service' do
+      let(:project) { create(:empty_project) }
+
+      it 'returns an empty array' do
+        expect(project.deployment_variables).to eq []
+      end
+    end
+
+    context 'when project has a deployment service' do
+      let(:project) { create(:kubernetes_project) }
+
+      it 'returns variables from this service' do
+        expect(project.deployment_variables).to include(
+          { key: 'KUBE_TOKEN', value: project.kubernetes_service.token, public: false }
+        )
+      end
+    end
+  end
+
   def enable_lfs
     allow(Gitlab.config.lfs).to receive(:enabled).and_return(true)
   end