1 files changed, 38 insertions, 0 deletions
diff --git a/lib/gitlab/ci/variables/collection.rb b/lib/gitlab/ci/variables/collection.rb
new file mode 100644
index 00000000000..0deca55fe8f
--- /dev/null
+++ b/lib/gitlab/ci/variables/collection.rb
@@ -0,0 +1,38 @@
+module Gitlab
+  module Ci
+    module Variables
+      class Collection
+        include Enumerable
+
+        def initialize(variables = [])
+          @variables = []
+
+          variables.each { |variable| self.append(variable) }
+        end
+
+        def append(resource)
+          tap { @variables.append(Collection::Item.fabricate(resource)) }
+        end
+
+        def concat(resources)
+          tap { resources.each { |variable| self.append(variable) } }
+        end
+
+        def each
+          @variables.each { |variable| yield variable }
+        end
+
+        def +(other)
+          self.class.new.tap do |collection|
+            self.each { |variable| collection.append(variable) }
+            other.each { |variable| collection.append(variable) }
+          end
+        end
+
+        def to_runner_variables
+          self.map(&:to_hash)
+        end
+      end
+    end
+  end
+end