1 files changed, 15 insertions, 1 deletions
diff --git a/lib/gitlab/ci/variables/helpers.rb b/lib/gitlab/ci/variables/helpers.rb
index e2a54f90ecb..3a62f01e2e3 100644
--- a/lib/gitlab/ci/variables/helpers.rb
+++ b/lib/gitlab/ci/variables/helpers.rb
@@ -23,7 +23,21 @@ module Gitlab
           def transform_from_yaml_variables(vars)
             return vars.stringify_keys if vars.is_a?(Hash)
 
-            vars.to_a.map { |var| [var[:key].to_s, var[:value]] }.to_h
+            vars.to_a.to_h { |var| [var[:key].to_s, var[:value]] }
+          end
+
+          def inherit_yaml_variables(from:, to:, inheritance:)
+            merge_variables(apply_inheritance(from, inheritance), to)
+          end
+
+          private
+
+          def apply_inheritance(variables, inheritance)
+            case inheritance
+            when true then variables
+            when false then {}
+            when Array then variables.select { |var| inheritance.include?(var[:key]) }
+            end
           end
         end
       end