Load license scan data as soon as it is available

* Add changelog entry

ee/app/models/ee/ci/pipeline.rb

@@ -165,6 +165,10 @@ module EE
                        .select(&:failed?)
       end
 
+      def license_scan_completed?
+        builds.latest.with_reports(::Ci::JobArtifact.license_scanning_reports).exists?
+      end
+
       private
 
       def project_has_subscriptions?

ee/app/models/ee/merge_request.rb

@@ -223,7 +223,7 @@ module EE
     end
 
     def compare_license_scanning_reports(current_user)
-      return missing_report_error("license scanning") unless has_license_scanning_reports?
+      return missing_report_error("license scanning") unless actual_head_pipeline&.license_scan_completed?
 
       compare_reports(::Ci::CompareLicenseScanningReportsService, current_user)
     end

ee/changelogs/unreleased/208723-load-licenses-sooner.yml

+---
+title: Load license scan data as soon as it is available
+merge_request: 44194
+author:
+type: fixed

ee/spec/models/ci/pipeline_spec.rb

@@ -512,4 +512,36 @@ RSpec.describe Ci::Pipeline do
 
     it { is_expected.to match_array(expected_builds) }
   end
+
+  describe "#license_scan_completed?" do
+    where(:pipeline_status, :build_types, :expected_status) do
+      [
+        [:blocked, [:container_scanning], false],
+        [:blocked, [:license_scan_v2_1, :container_scanning], true],
+        [:blocked, [:license_scan_v2_1], true],
+        [:blocked, [], false],
+        [:failed, [:container_scanning], false],
+        [:failed, [:license_scan_v2_1, :container_scanning], true],
+        [:failed, [:license_scan_v2_1], true],
+        [:failed, [], false],
+        [:running, [:container_scanning], false],
+        [:running, [:license_scan_v2_1, :container_scanning], true],
+        [:running, [:license_scan_v2_1], true],
+        [:running, [], false],
+        [:success, [:container_scanning], false],
+        [:success, [:license_scan_v2_1, :container_scanning], true],
+        [:success, [:license_scan_v2_1], true],
+        [:success, [], false]
+      ]
+    end
+
+    with_them do
+      subject { pipeline.license_scan_completed? }
+
+      let(:pipeline) { create(:ci_pipeline, pipeline_status, builds: builds) }
+      let(:builds) { build_types.map { |build_type| create(:ee_ci_build, build_type) } }
+
+      specify { expect(subject).to eq(expected_status) }
+    end
+  end
 end

ee/spec/models/merge_request_spec.rb

@@ -728,6 +728,40 @@ RSpec.describe MergeRequest do
         expect(subject[:status_reason]).to eq('This merge request does not have license scanning reports')
       end
     end
+
+    context "when a license scan report is produced from the head pipeline" do
+      where(:pipeline_status, :build_types, :expected_status) do
+        [
+          [:blocked, [:license_scan_v2_1], :parsed],
+          [:blocked, [:container_scanning], :error],
+          [:blocked, [:license_scan_v2_1, :container_scanning], :parsed],
+          [:blocked, [], :error],
+          [:failed, [:container_scanning], :error],
+          [:failed, [:license_scan_v2_1], :parsed],
+          [:failed, [:license_scan_v2_1, :container_scanning], :parsed],
+          [:failed, [], :error],
+          [:running, [:container_scanning], :error],
+          [:running, [:license_scan_v2_1], :parsed],
+          [:running, [:license_scan_v2_1, :container_scanning], :parsed],
+          [:running, [], :error],
+          [:success, [:container_scanning], :error],
+          [:success, [:license_scan_v2_1], :parsed],
+          [:success, [:license_scan_v2_1, :container_scanning], :parsed],
+          [:success, [], :error]
+        ]
+      end
+
+      with_them do
+        let!(:head_pipeline) { create(:ci_pipeline, pipeline_status, project: project, ref: merge_request.source_branch, sha: merge_request.diff_head_sha, builds: builds) }
+        let(:builds) { build_types.map { |build_type| create(:ee_ci_build, build_type) } }
+
+        before do
+          synchronous_reactive_cache(merge_request)
+        end
+
+        specify { expect(subject[:status]).to eq(expected_status) }
+      end
+    end
   end
 
   describe '#compare_metrics_reports' do