Add new rake task

Add a task that checks repository integrity with `git fsck`.

CHANGELOG

@@ -15,6 +15,7 @@ v 7.10.0 (unreleased)
   - Don't leak existence of group or project via search.
   - Fix bug where Wiki pages that included a '/' were no longer accessible (Stan Hu)
   - Fix bug where error messages from Dropzone would not be displayed on the issues page (Stan Hu)
+  - Add a rake task to check repository integrity with `git fsck`
   - Add ability to configure Reply-To address in gitlab.yml (Stan Hu)
   - Move current user to the top of the list in assignee/author filters (Stan Hu)
   - Fix broken side-by-side diff view on merge request page (Stan Hu)

lib/tasks/gitlab/check.rake

@@ -687,6 +687,23 @@ namespace :gitlab do
     end
   end
 
+  namespace :repo do
+    desc "GITLAB | Check the integrity of the repositories managed by GitLab"
+    task check: :environment do
+      namespace_dirs = Dir.glob(
+        File.join(Gitlab.config.gitlab_shell.repos_path, '*')
+      )
+
+      namespace_dirs.each do |namespace_dir|
+        repo_dirs = Dir.glob(File.join(namespace_dir, '*'))
+        repo_dirs.each do |dir|
+          puts "\nChecking repo at #{dir}"
+          system(*%w(git fsck), chdir: dir)
+        end
+      end
+    end
+  end
+
   # Helper methods
   ##########################