Unify mirror addition operations to prepare for Gitaly migration

app/models/repository.rb

@@ -1020,8 +1020,7 @@ class Repository
       tmp_remote_name = true
     end
 
-    add_remote(remote_name, url)
-    set_remote_as_mirror(remote_name, refmap: refmap)
+    add_remote(remote_name, url, mirror_refmap: refmap)
     fetch_remote(remote_name, forced: forced)
   ensure
     remove_remote(remote_name) if tmp_remote_name

lib/gitlab/git/repository.rb

@@ -892,8 +892,11 @@ module Gitlab
         end
       end
 
-      def add_remote(remote_name, url)
+      # If `mirror_refmap` is present the remote is set as mirror with that mapping
+      def add_remote(remote_name, url, mirror_refmap: nil)
         rugged.remotes.create(remote_name, url)
+
+        set_remote_as_mirror(remote_name, refmap: mirror_refmap) if mirror_refmap
       rescue Rugged::ConfigError
         remote_update(remote_name, url: url)
       end
@@ -1147,8 +1150,7 @@ module Gitlab
           end
         end
 
-        add_remote(remote_name, url)
-        set_remote_as_mirror(remote_name)
+        add_remote(remote_name, url, mirror_refmap: :all_refs)
         fetch_remote(remote_name, env: env)
       ensure
         remove_remote(remote_name)

lib/gitlab/git/repository_mirroring.rb

@@ -17,20 +17,6 @@ module Gitlab
         rugged.config["remote.#{remote_name}.prune"] = true
       end
 
-      def set_remote_refmap(remote_name, refmap)
-        Array(refmap).each_with_index do |refspec, i|
-          refspec = REFMAPS[refspec] || refspec
-
-          # We need multiple `fetch` entries, but Rugged only allows replacing a config, not adding to it.
-          # To make sure we start from scratch, we set the first using rugged, and use `git` for any others
-          if i == 0
-            rugged.config["remote.#{remote_name}.fetch"] = refspec
-          else
-            run_git(%W[config --add remote.#{remote_name}.fetch #{refspec}])
-          end
-        end
-      end
-
       def remote_tags(remote)
         # Each line has this format: "dc872e9fa6963f8f03da6c8f6f264d0845d6b092\trefs/tags/v1.10.0\n"
         # We want to convert it to: [{ 'v1.10.0' => 'dc872e9fa6963f8f03da6c8f6f264d0845d6b092' }, ...]
@@ -72,6 +58,20 @@ module Gitlab
 
       private
 
+      def set_remote_refmap(remote_name, refmap)
+        Array(refmap).each_with_index do |refspec, i|
+          refspec = REFMAPS[refspec] || refspec
+
+          # We need multiple `fetch` entries, but Rugged only allows replacing a config, not adding to it.
+          # To make sure we start from scratch, we set the first using rugged, and use `git` for any others
+          if i == 0
+            rugged.config["remote.#{remote_name}.fetch"] = refspec
+          else
+            run_git(%W[config --add remote.#{remote_name}.fetch #{refspec}])
+          end
+        end
+      end
+
       def list_remote_tags(remote)
         tag_list, exit_code, error = nil
         cmd = %W(#{Gitlab.config.git.bin_path} --git-dir=#{path} ls-remote --tags #{remote})