Expose report download path in build details

Exposes report download paths in build details.

app/serializers/build_details_entity.rb

@@ -42,6 +42,10 @@ class BuildDetailsEntity < JobEntity
     end
   end
 
+  expose :reports, if: -> (*) { can?(current_user, :read_build, build) }, using: JobArtifactEntity do |build|
+    build.job_artifacts.merge(Ci::JobArtifact.with_all_reports)
+  end
+
   expose :erased_by, if: -> (*) { build.erased? }, using: UserEntity
   expose :erase_path, if: -> (*) { build.erasable? && can?(current_user, :erase_build, build) } do |build|
     erase_project_job_path(project, build)

app/serializers/job_artifact_entity.rb

+# frozen_string_literal: true
+
+class JobArtifactEntity < Grape::Entity
+  include RequestAwareEntity
+
+  expose :file_type
+  expose :file_format
+  expose :size
+
+  expose :download_path do |artifact|
+    download_project_job_artifacts_path(job.project, job, file_type: artifact.file_format)
+  end
+
+  alias_method :job, :object
+end

spec/serializers/build_details_entity_spec.rb

@@ -146,5 +146,13 @@ describe BuildDetailsEntity do
         end
       end
     end
+
+    context 'when the build has reports' do
+      let!(:report) { create(:ci_job_artifact, :codequality, job: build) }
+
+      it 'exposes the report artifacts' do
+        expect(subject[:reports]).not_to be_empty
+      end
+    end
   end
 end

spec/serializers/job_artifact_entity_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe JobArtifactEntity do
+  let(:report) { create(:ci_job_artifact, :codequality) }
+  let(:entity) { described_class.new(report, request: double) }
+
+  describe '#as_json' do
+    subject { entity.as_json }
+
+    it 'exposes file_type' do
+      expect(subject[:file_type]).to eq(report.file_type)
+    end
+
+    it 'exposes file_format' do
+      expect(subject[:file_format]).to eq(report.file_format)
+    end
+
+    it 'exposes size' do
+      expect(subject[:size]).to eq(report.size)
+    end
+
+    it 'exposes download path' do
+      expect(subject[:download_path]).to include("jobs/#{report.job.id}/artifacts/download")
+    end
+  end
+end