Merge branch '33772-readonly-gitlab-ci-cache' into 'master'

Introduce cache policies for CI jobs

Closes #33772

See merge request !12483

2 files changed, 13 insertions, 3 deletions

diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index e9bad721f44..99eda3b0c4b 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -832,7 +832,7 @@ module API
       end
 
       class Cache < Grape::Entity
-        expose :key, :untracked, :paths
+        expose :key, :untracked, :paths, :policy
       end
 
       class Credentials < Grape::Entity
diff --git a/lib/gitlab/ci/config/entry/cache.rb b/lib/gitlab/ci/config/entry/cache.rb
index f074df9c7a1..d7e09acbbf3 100644
--- a/lib/gitlab/ci/config/entry/cache.rb
+++ b/lib/gitlab/ci/config/entry/cache.rb
@@ -7,11 +7,14 @@ module Gitlab
         #
         class Cache < Node
           include Configurable
+          include Attributable
 
-          ALLOWED_KEYS = %i[key untracked paths].freeze
+          ALLOWED_KEYS = %i[key untracked paths policy].freeze
+          DEFAULT_POLICY = 'pull-push'.freeze
 
           validations do
             validates :config, allowed_keys: ALLOWED_KEYS
+            validates :policy, inclusion: { in: %w[pull-push push pull], message: 'should be pull-push, push, or pull' }, allow_blank: true
           end
 
           entry :key, Entry::Key,
@@ -25,8 +28,15 @@ module Gitlab
 
           helpers :key
 
+          attributes :policy
+
           def value
-            super.merge(key: key_value)
+            result = super
+
+            result[:key] = key_value
+            result[:policy] = policy || DEFAULT_POLICY
+
+            result
           end
         end
       end