Add Container Registry API

This includes a set of APIs to manipulate container registry.
This includes also an ability to delete tags based on requested
criteria, like keep-last-n, matching-name, older-than.

1 files changed, 11 insertions, 2 deletions

diff --git a/app/services/concerns/exclusive_lease_guard.rb b/app/services/concerns/exclusive_lease_guard.rb
index f102e00d150..28879d2d67f 100644
--- a/app/services/concerns/exclusive_lease_guard.rb
+++ b/app/services/concerns/exclusive_lease_guard.rb
@@ -6,9 +6,14 @@
 #
 # `#try_obtain_lease` takes a block which will be run if it was able to
 # obtain  the lease. Implement `#lease_timeout` to configure the timeout
-# for the exclusive lease. Optionally override `#lease_key` to set the
+# for the exclusive lease.
+#
+# Optionally override `#lease_key` to set the
 # lease key, it defaults to the class name with underscores.
 #
+# Optionally override `#lease_release?` to prevent the job to
+# be re-executed more often than LEASE_TIMEOUT.
+#
 module ExclusiveLeaseGuard
   extend ActiveSupport::Concern
 
@@ -23,7 +28,7 @@ module ExclusiveLeaseGuard
     begin
       yield lease
     ensure
-      release_lease(lease)
+      release_lease(lease) if lease_release?
     end
   end
 
@@ -40,6 +45,10 @@ module ExclusiveLeaseGuard
           "#{self.class.name} does not implement #{__method__}"
   end
 
+  def lease_release?
+    true
+  end
+
   def release_lease(uuid)
     Gitlab::ExclusiveLease.cancel(lease_key, uuid)
   end