Add minimal backend changes to expose blob_path [ci skip]

app/serializers/merge_request_entity.rb

@@ -195,11 +195,19 @@ class MergeRequestEntity < IssuableEntity
                                       path: 'codeclimate.json')
     end
 
+    expose :head_blob_path, if: -> (mr, _) { mr.head_pipeline_sha } do |merge_request|
+      project_blob_path(merge_request.project, merge_request.head_pipeline_sha)
+    end
+
     expose :base_path, if: -> (mr, _) { can?(current_user, :read_build, mr.base_codeclimate_artifact) } do |merge_request|
       raw_project_build_artifacts_url(merge_request.target_project,
                                       merge_request.base_codeclimate_artifact,
                                       path: 'codeclimate.json')
     end
+
+    expose :base_blob_path, if: -> (mr, _) { mr.base_pipeline_sha } do |merge_request|
+      project_blob_path(merge_request.project, merge_request.base_pipeline_sha)
+    end
   end
 
   private

ee/app/assets/javascripts/vue_merge_request_widget/components/mr_widget_code_quality.vue

@@ -107,7 +107,7 @@ export default {
   },
 
   created() {
-    const { head_path, base_path } = this.mr.codeclimate;
+    const { head_path, head_blob_path, base_path, base_blob_path } = this.mr.codeclimate;
 
     this.isLoading = true;
 

ee/app/assets/javascripts/vue_merge_request_widget/stores/mr_widget_store.js

@@ -57,7 +57,10 @@ export default class MergeRequestStore extends CEMergeRequestStore {
   }
 
   compareCodeclimateMetrics(headIssues, baseIssues) {
+    // newIssues link to head_blob_path+"/"+filename+"#L"+begin
     this.codeclimateMetrics.newIssues = this.filterByFingerprint(headIssues, baseIssues);
+
+    // resolvedIssues link to base_blob_path+"/"+filename+"#L"+begin
     this.codeclimateMetrics.resolvedIssues = this.filterByFingerprint(baseIssues, headIssues);
   }
 

ee/app/models/ee/merge_request.rb

@@ -11,6 +11,8 @@ module EE
 
       delegate :codeclimate_artifact, to: :head_pipeline, prefix: :head, allow_nil: true
       delegate :codeclimate_artifact, to: :base_pipeline, prefix: :base, allow_nil: true
+      delegate :sha, to: :head_pipeline, prefix: :head_pipeline, allow_nil: true
+      delegate :sha, to: :base_pipeline, prefix: :base_pipeline, allow_nil: true
     end
 
     def rebase_dir_path