Fix merge request SHA

lib/bitbucket_server/representation/activity.rb

@@ -28,25 +28,33 @@ module BitbucketServer
       end
 
       def committer_user
-        raw.dig('commit', 'committer', 'displayName')
+        commit.dig('committer', 'displayName')
       end
 
       def committer_email
-        raw.dig('commit', 'committer', 'emailAddress')
+        commit.dig('committer', 'emailAddress')
       end
 
       def merge_timestamp
-        timestamp = raw.dig('commit', 'committerTimestamp')
+        timestamp = commit['committerTimestamp']
 
         self.class.convert_timestamp(timestamp)
       end
 
+      def merge_commit
+        commit['id']
+      end
+
       def created_at
         self.class.convert_timestamp(created_date)
       end
 
       private
 
+      def commit
+        raw.fetch('commit', {})
+      end
+
       def action
         raw['action']
       end

lib/gitlab/bitbucket_server_import/importer.rb

@@ -197,7 +197,6 @@ module Gitlab
           updated_at: pull_request.updated_at
         }
 
-        attributes[:merge_commit_sha] = target_branch_sha if pull_request.merged?
         merge_request = project.merge_requests.create!(attributes)
         import_pull_request_comments(pull_request, merge_request) if merge_request.persisted?
       end
@@ -219,6 +218,7 @@ module Gitlab
 
         user_id = gitlab_user_id(committer)
         timestamp = merge_event.merge_timestamp
+        merge_request.update_attributes({ merge_commit_sha: merge_event.merge_commit })
         metric = MergeRequest::Metrics.find_or_initialize_by(merge_request: merge_request)
         metric.update(merged_by_id: user_id, merged_at: timestamp)
       end

spec/lib/bitbucket_server/representation/activity_spec.rb

@@ -33,5 +33,6 @@ describe BitbucketServer::Representation::Activity do
     it { expect(subject.committer_email).to eq('test.user@example.com') }
     it { expect(subject.merge_timestamp).to be_a(Time) }
     it { expect(subject.created_at).to be_a(Time) }
+    it { expect(subject.merge_commit).to eq('839fa9a2d434eb697815b8fcafaecc51accfdbbc') }
   end
 end

spec/lib/gitlab/bitbucket_server_import/importer_spec.rb

@@ -65,7 +65,9 @@ describe Gitlab::BitbucketServerImport::Importer do
         comment?: false,
         merge_event?: true,
         committer_email: project.owner.email,
-        merge_timestamp: now)
+        merge_timestamp: now,
+        merge_commit: '12345678'
+      )
 
       @pr_note = instance_double(
         BitbucketServer::Representation::Comment,
@@ -90,6 +92,7 @@ describe Gitlab::BitbucketServerImport::Importer do
       merge_request = MergeRequest.first
       expect(merge_request.metrics.merged_by).to eq(project.owner)
       expect(merge_request.metrics.merged_at).to eq(@merge_event.merge_timestamp)
+      expect(merge_request.merge_commit_sha).to eq('12345678')
     end
 
     it 'imports comments' do