backup repo with tar instead of git bundle

CHANGELOG

@@ -86,6 +86,7 @@ v 7.9.0 (unreleased)
   - Ability to unsubscribe/subscribe to issue or merge request
   - Delete deploy key when last connection to a project is destroyed.
   - Fix invalid Atom feeds when using emoji, horizontal rules, or images (Christian Walther)
+  - Backup of repositories with tar instead of git bundle (only now are git-annex files included in the backup)
 
 v 7.8.4
   - Fix issue_tracker_id substitution in custom issue trackers

lib/backup/repository.rb

@@ -16,7 +16,7 @@ module Backup
         if project.empty_repo?
           $progress.puts "[SKIPPED]".cyan
         else
-          cmd = %W(git --git-dir=#{path_to_repo(project)} bundle create #{path_to_bundle(project)} --all)
+          cmd = %W(tar -cf #{path_to_bundle(project)} -C #{path_to_repo(project)} .)
           output, status = Gitlab::Popen.popen(cmd)
           if status.zero?
             $progress.puts "[DONE]".green
@@ -64,7 +64,8 @@ module Backup
         project.namespace.ensure_dir_exist if project.namespace
 
         if File.exists?(path_to_bundle(project))
-          cmd = %W(git clone --bare #{path_to_bundle(project)} #{path_to_repo(project)})
+          FileUtils.mkdir_p(path_to_repo(project))
+          cmd = %W(tar -xf #{path_to_bundle(project)} -C #{path_to_repo(project)})
         else
           cmd = %W(git init --bare #{path_to_repo(project)})
         end