1 files changed, 61 insertions, 0 deletions
diff --git a/lib/gitlab/ci/pipeline/chain/command.rb b/lib/gitlab/ci/pipeline/chain/command.rb
new file mode 100644
index 00000000000..7b19b10e05b
--- /dev/null
+++ b/lib/gitlab/ci/pipeline/chain/command.rb
@@ -0,0 +1,61 @@
+module Gitlab
+  module Ci
+    module Pipeline
+      module Chain
+        Command = Struct.new(
+          :source, :project, :current_user,
+          :origin_ref, :checkout_sha, :after_sha, :before_sha,
+          :trigger_request, :schedule,
+          :ignore_skip_ci, :save_incompleted,
+          :seeds_block
+        ) do
+          include Gitlab::Utils::StrongMemoize
+
+          def initialize(**params)
+            params.each do |key, value|
+              self[key] = value
+            end
+          end
+
+          def branch_exists?
+            strong_memoize(:is_branch) do
+              project.repository.branch_exists?(ref)
+            end
+          end
+
+          def tag_exists?
+            strong_memoize(:is_tag) do
+              project.repository.tag_exists?(ref)
+            end
+          end
+
+          def ref
+            strong_memoize(:ref) do
+              Gitlab::Git.ref_name(origin_ref)
+            end
+          end
+
+          def sha
+            strong_memoize(:sha) do
+              project.commit(origin_sha || origin_ref).try(:id)
+            end
+          end
+
+          def origin_sha
+            checkout_sha || after_sha
+          end
+
+          def before_sha
+            self[:before_sha] || checkout_sha || Gitlab::Git::BLANK_SHA
+          end
+
+          def protected_ref?
+            strong_memoize(:protected_ref) do
+              project.protected_for?(ref)
+            end
+          end
+        end
+      end
+    end
+  end
+end