Only expire tag cache once per push

Previously each tag in a push would invoke the Gitaly `FindAllTags` RPC
since the tag cache would be invalidated with every tag.

We can eliminate those extraneous calls by expiring the tag cache once
in `PostReceive` and taking advantage of the cached tags.

Relates to https://gitlab.com/gitlab-org/gitlab-ce/issues/65795

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/gitlab/git_post_receive.rb b/lib/gitlab/git_post_receive.rb
index 6c7f23a673c..24d752b8a4b 100644
--- a/lib/gitlab/git_post_receive.rb
+++ b/lib/gitlab/git_post_receive.rb
@@ -33,6 +33,12 @@ module Gitlab
       end
     end
 
+    def includes_tags?
+      enum_for(:changes_refs).any? do |_oldrev, _newrev, ref|
+        Gitlab::Git.tag_ref?(ref)
+      end
+    end
+
     private
 
     def deserialize_changes(changes)