Add deprecation warning in build create

Signed-off-by: Rashed Kamal <rashed.kamal@broadcom.com>

Author: rashedkvm

app/controllers/v3/builds_controller.rb

@@ -65,6 +65,8 @@ def create
       }
     )
 
+    add_warning_headers(build.stack_warnings) if build.stack_warnings&.any?
+
     render status: :created, json: Presenters::V3::BuildPresenter.new(build)
   rescue BuildCreate::InvalidPackage => e
     bad_request!(e.message)

spec/request/builds_spec.rb

@@ -303,6 +303,16 @@
           expect(parsed_response['warnings'][0]['detail']).to include('deprecated')
           expect(parsed_response['warnings'][0]['detail']).to include('cflinuxfs3 stack is deprecated')
         end
+
+        it 'includes warming in response headers' do
+          post '/v3/builds', create_request.to_json, developer_headers
+
+          expect(last_response.status).to eq(201)
+          expect(last_response.headers['X-Cf-Warnings']).to be_present
+          warning = CGI.unescape(last_response.headers['X-Cf-Warnings'])
+          expect(warning).to include('deprecated')
+          expect(warning).to include('cflinuxfs3 stack is deprecated')
+        end
       end
 
       context 'app has previous builds' do
@@ -322,6 +332,16 @@
           expect(parsed_response['warnings'][0]['detail']).to include('cflinuxfs3 stack is deprecated')
           expect(app_model.builds_dataset.count).to eq(2)
         end
+
+        it 'includes warming in response headers' do
+          post '/v3/builds', create_request.to_json, developer_headers
+
+          expect(last_response.status).to eq(201)
+          expect(last_response.headers['X-Cf-Warnings']).to be_present
+          warning = CGI.unescape(last_response.headers['X-Cf-Warnings'])
+          expect(warning).to include('deprecated')
+          expect(warning).to include('cflinuxfs3 stack is deprecated')
+        end
       end
     end
   end