Add blob_path to sast data

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/serializers/merge_request_entity.rb

@@ -212,10 +212,16 @@ class MergeRequestEntity < IssuableEntity
     end
   end
 
-  expose :sast_path, if: -> (mr, _) { expose_sast_data?(mr, current_user) } do |merge_request|
-    raw_project_build_artifacts_url(merge_request.source_project,
-                                    merge_request.sast_artifact,
-                                    path: 'gl-sast-report.json')
+  expose :sast, if: -> (mr, _) { expose_sast_data?(mr, current_user) } do
+    expose :path do |merge_request|
+      raw_project_build_artifacts_url(merge_request.source_project,
+                                      merge_request.sast_artifact,
+                                      path: 'gl-sast-report.json')
+    end
+
+    expose :blob_path, if: -> (mr, _) { mr.head_pipeline_sha } do |merge_request|
+      project_blob_path(merge_request.project, merge_request.head_pipeline_sha)
+    end
   end
 
   private

spec/ee/spec/models/ee/merge_request_spec.rb

@@ -170,4 +170,14 @@ describe MergeRequest do
   describe '#sast_artifact' do
     it { is_expected.to delegate_method(:sast_artifact).to(:head_pipeline) }
   end
+
+  describe '#has_sast_data?' do
+    let(:artifact) { double(success?: true) }
+
+    before do
+      allow(merge_request).to receive(:sast_artifact).and_return(artifact)
+    end
+
+    it { expect(merge_request.has_sast_data?).to be_truthy }
+  end
 end

spec/ee/spec/serializers/merge_request_entity_spec.rb

@@ -15,6 +15,6 @@ describe MergeRequestEntity do
     allow(subject).to receive(:expose_sast_data?).and_return(true)
     allow(merge_request).to receive(:sast_artifact).and_return(build)
 
-    expect(subject.as_json).to include(:sast_path)
+    expect(subject.as_json).to include(:sast)
   end
 end