Add a null token to pipelines expressions

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/gitlab/ci/pipeline/expression/null.rb b/lib/gitlab/ci/pipeline/expression/null.rb
new file mode 100644
index 00000000000..d33f0bffc48
--- /dev/null
+++ b/lib/gitlab/ci/pipeline/expression/null.rb
@@ -0,0 +1,19 @@
+module Gitlab
+  module Ci
+    module Pipeline
+      module Expression
+        class Null < Expression::Token
+          PATTERN = /null/.freeze
+
+          def initialize(value)
+            @value = value
+          end
+
+          def evaluate(**_)
+            nil
+          end
+        end
+      end
+    end
+  end
+end