Add :preparing status to HasStatus

Introduces a new status for builds between :created and :pending
that will be used when builds require one or more prerequisite
actions to be completed before being picked up by a runner
(such as creating Kubernetes resources before deploying).

The existing :created > :pending transition is unchanged, so
only builds that require preparation will use the :preparing
status.

1 files changed, 6 insertions, 1 deletions

diff --git a/app/models/ci/stage.rb b/app/models/ci/stage.rb
index 0389945191e..098f5189517 100644
--- a/app/models/ci/stage.rb
+++ b/app/models/ci/stage.rb
@@ -39,10 +39,14 @@ module Ci
 
     state_machine :status, initial: :created do
       event :enqueue do
-        transition created: :pending
+        transition [:created, :preparing] => :pending
         transition [:success, :failed, :canceled, :skipped] => :running
       end
 
+      event :prepare do
+        transition any - [:preparing] => :preparing
+      end
+
       event :run do
         transition any - [:running] => :running
       end
@@ -76,6 +80,7 @@ module Ci
       retry_optimistic_lock(self) do
         case statuses.latest.status
         when 'created' then nil
+        when 'preparing' then prepare
         when 'pending' then enqueue
         when 'running' then run
         when 'success' then succeed