1 files changed, 38 insertions, 0 deletions
diff --git a/app/services/ci/pipeline_artifacts/create_code_quality_mr_diff_report_service.rb b/app/services/ci/pipeline_artifacts/create_code_quality_mr_diff_report_service.rb
new file mode 100644
index 00000000000..5c52eef7ba6
--- /dev/null
+++ b/app/services/ci/pipeline_artifacts/create_code_quality_mr_diff_report_service.rb
@@ -0,0 +1,38 @@
+# frozen_string_literal: true
+module Ci
+  module PipelineArtifacts
+    class CreateCodeQualityMrDiffReportService
+      def execute(pipeline)
+        return unless pipeline.can_generate_codequality_reports?
+        return if pipeline.has_codequality_mr_diff_report?
+
+        file = build_carrierwave_file(pipeline)
+
+        pipeline.pipeline_artifacts.create!(
+          project_id: pipeline.project_id,
+          file_type: :code_quality_mr_diff,
+          file_format: Ci::PipelineArtifact::REPORT_TYPES.fetch(:code_quality_mr_diff),
+          size: file["tempfile"].size,
+          file: file,
+          expire_at: Ci::PipelineArtifact::EXPIRATION_DATE.from_now
+        )
+      end
+
+      private
+
+      def build_carrierwave_file(pipeline)
+        CarrierWaveStringFile.new_file(
+          file_content: build_quality_mr_diff_report(pipeline),
+          filename: Ci::PipelineArtifact::DEFAULT_FILE_NAMES.fetch(:code_quality_mr_diff),
+          content_type: 'application/json'
+        )
+      end
+
+      def build_quality_mr_diff_report(pipeline)
+        mr_diff_report = Gitlab::Ci::Reports::CodequalityMrDiff.new(pipeline.codequality_reports)
+
+        Ci::CodequalityMrDiffReportSerializer.new.represent(mr_diff_report).to_json # rubocop: disable CodeReuse/Serializer
+      end
+    end
+  end
+end