Gate feature behind FF

app/services/ci/create_job_artifacts_service.rb

@@ -33,8 +33,7 @@ module Ci
         file_type: params['artifact_type'],
         file_format: params['artifact_format'],
         file_sha256: artifacts_file.sha256,
-        expire_in: expire_in,
-        locked: true)
+        expire_in: expire_in)
 
       artifact_metadata = if metadata_file
                             Ci::JobArtifact.new(
@@ -44,10 +43,14 @@ module Ci
                               file_type: :metadata,
                               file_format: :gzip,
                               file_sha256: metadata_file.sha256,
-                              expire_in: expire_in,
-                              locked: true)
+                              expire_in: expire_in)
                           end
 
+      if Feature.enabled?(:keep_latest_artifact_for_ref, job.project)
+        artifact.locked = true
+        artifact_metadata.locked = true
+      end
+
       [artifact, artifact_metadata]
     end
 
@@ -85,6 +88,8 @@ module Ci
     end
 
     def unlock_previous_artifacts!(artifact)
+      return unless Feature.enabled?(:keep_latest_artifact_for_ref, artifact.job.project)
+
       Ci::JobArtifact.for_ref(artifact.job.ref, artifact.project_id).locked.update_all(locked: false)
     end
 

app/services/ci/destroy_expired_job_artifacts_service.rb

@@ -28,7 +28,13 @@ module Ci
     private
 
     def destroy_batch
-      artifacts = Ci::JobArtifact.expired(BATCH_SIZE).unlocked.to_a
+      artifact_batch = if Feature.enabled?(:keep_latest_artifact_for_ref)
+                         Ci::JobArtifact.expired(BATCH_SIZE).unlocked
+                       else
+                         Ci::JobArtifact.expired(BATCH_SIZE)
+                       end
+
+      artifacts = artifact_batch.to_a
 
       return false if artifacts.empty?