1 files changed, 31 insertions, 0 deletions
diff --git a/lib/gitlab/ci/pipeline/chain/seed_block.rb b/lib/gitlab/ci/pipeline/chain/seed_block.rb
new file mode 100644
index 00000000000..f8e62949bea
--- /dev/null
+++ b/lib/gitlab/ci/pipeline/chain/seed_block.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Ci
+    module Pipeline
+      module Chain
+        class SeedBlock < Chain::Base
+          include Chain::Helpers
+          include Gitlab::Utils::StrongMemoize
+
+          def perform!
+            return unless ::Gitlab::Ci::Features.seed_block_run_before_workflow_rules_enabled?(project)
+
+            ##
+            # Populate pipeline with block argument of CreatePipelineService#execute.
+            #
+            @command.seeds_block&.call(pipeline)
+
+            raise "Pipeline cannot be persisted by `seeds_block`" if pipeline.persisted?
+          end
+
+          def break?
+            return false unless ::Gitlab::Ci::Features.seed_block_run_before_workflow_rules_enabled?(project)
+
+            pipeline.errors.any?
+          end
+        end
+      end
+    end
+  end
+end