Make it possible to fabricate CI/CD bridge jobs

lib/gitlab/ci/pipeline/seed/build.rb

@@ -38,9 +38,17 @@ module Gitlab
             )
           end
 
+          def bridge?
+            @attributes.to_h.dig(:options, :trigger).present?
+          end
+
           def to_resource
             strong_memoize(:resource) do
-              ::Ci::Build.new(attributes)
+              if bridge?
+                ::Ci::Bridge.new(attributes)
+              else
+                ::Ci::Build.new(attributes)
+              end
             end
           end
         end

lib/gitlab/ci/pipeline/seed/stage.rb

@@ -39,7 +39,13 @@ module Gitlab
           def to_resource
             strong_memoize(:stage) do
               ::Ci::Stage.new(attributes).tap do |stage|
-                seeds.each { |seed| stage.builds << seed.to_resource }
+                seeds.each do |seed|
+                  if seed.bridge?
+                    stage.statuses << seed.to_resource
+                  else
+                    stage.builds << seed.to_resource
+                  end
+                end
               end
             end
           end

lib/gitlab/ci/yaml_processor.rb

@@ -33,7 +33,7 @@ module Gitlab
 
         { stage_idx: @stages.index(job[:stage]),
           stage: job[:stage],
-          tag_list: job[:tags] || [],
+          tag_list: job[:tags],
           name: job[:name].to_s,
           allow_failure: job[:ignore],
           when: job[:when] || 'on_success',
@@ -53,7 +53,8 @@ module Gitlab
             retry: job[:retry],
             parallel: job[:parallel],
             instance: job[:instance],
-            start_in: job[:start_in]
+            start_in: job[:start_in],
+            trigger: job[:trigger]
           }.compact }
       end
 

spec/lib/gitlab/ci/pipeline/seed/build_spec.rb

@@ -5,8 +5,7 @@ describe Gitlab::Ci::Pipeline::Seed::Build do
   let(:pipeline) { create(:ci_empty_pipeline, project: project) }
 
   let(:attributes) do
-    { name: 'rspec',
-      ref: 'master' }
+    { name: 'rspec', ref: 'master' }
   end
 
   subject do
@@ -21,10 +20,45 @@ describe Gitlab::Ci::Pipeline::Seed::Build do
     end
   end
 
+  describe '#bridge?' do
+    context 'when job is a bridge' do
+      let(:attributes) do
+        { name: 'rspec', ref: 'master', options: { trigger: 'my/project' } }
+      end
+
+      it { is_expected.to be_bridge }
+    end
+
+    context 'when trigger definition is empty' do
+      let(:attributes) do
+        { name: 'rspec', ref: 'master', options: { trigger: '' } }
+      end
+
+      it { is_expected.not_to be_bridge }
+    end
+
+    context 'when job is not a bridge' do
+      it { is_expected.not_to be_bridge }
+    end
+  end
+
   describe '#to_resource' do
-    it 'returns a valid build resource' do
-      expect(subject.to_resource).to be_a(::Ci::Build)
-      expect(subject.to_resource).to be_valid
+    context 'when job is not a bridge' do
+      it 'returns a valid build resource' do
+        expect(subject.to_resource).to be_a(::Ci::Build)
+        expect(subject.to_resource).to be_valid
+      end
+    end
+
+    context 'when job is a bridge' do
+      let(:attributes) do
+        { name: 'rspec', ref: 'master', options: { trigger: 'my/project' } }
+      end
+
+      it 'returns a valid bridge resource' do
+        expect(subject.to_resource).to be_a(::Ci::Bridge)
+        expect(subject.to_resource).to be_valid
+      end
     end
 
     it 'memoizes a resource object' do

spec/lib/gitlab/ci/pipeline/seed/stage_spec.rb

@@ -62,8 +62,18 @@ describe Gitlab::Ci::Pipeline::Seed::Stage do
       expect(subject.seeds.map(&:attributes)).to all(include(ref: 'master'))
       expect(subject.seeds.map(&:attributes)).to all(include(tag: false))
       expect(subject.seeds.map(&:attributes)).to all(include(project: pipeline.project))
-      expect(subject.seeds.map(&:attributes))
-        .to all(include(trigger_request: pipeline.trigger_requests.first))
+    end
+
+    context 'when a legacy trigger exists' do
+      before do
+        create(:ci_trigger_request, pipeline: pipeline)
+      end
+
+      it 'returns build seeds including legacy trigger' do
+        expect(pipeline.legacy_trigger).not_to be_nil
+        expect(subject.seeds.map(&:attributes))
+          .to all(include(trigger_request: pipeline.legacy_trigger))
+      end
     end
 
     context 'when a ref is protected' do