Merge branch 'restore_wikis' into 'master'

Fix wiki restore

Seems 4a5044e3 only fixed git repos restore. This MR provides the same functionality that was introduced in the aforementioned commit, but for wikis.

See merge request !247

CHANGELOG

@@ -2,7 +2,7 @@ v 7.6.0
   - Fork repository to groups
   - New rugged version
   - Add CRON=1 backup setting for quiet backups
-  -
+  - Fix failing wiki restore
   -
   - Add optional Sidekiq MemoryKiller middleware (enabled via SIDEKIQ_MAX_RSS env variable)
   -

lib/backup/repository.rb

@@ -79,9 +79,14 @@ module Backup
 
         wiki = ProjectWiki.new(project)
 
-        if File.exists?(path_to_bundle(wiki))
         $progress.print " * #{wiki.path_with_namespace} ... "
+
+        if File.exists?(path_to_bundle(wiki))
           cmd = %W(git clone --bare #{path_to_bundle(wiki)} #{path_to_repo(wiki)})
+        else
+          cmd = %W(git init --bare #{path_to_repo(wiki)})
+        end
+
         if system(*cmd, silent)
           $progress.puts " [DONE]".green
         else
@@ -90,7 +95,6 @@ module Backup
           abort 'Restore failed'
         end
       end
-      end
 
       $progress.print 'Put GitLab hooks in repositories dirs'.yellow
       cmd = "#{Gitlab.config.gitlab_shell.path}/bin/create-hooks"