Implement GitLab QA release inflection strategy

1 files changed, 45 insertions, 0 deletions

diff --git a/qa/qa/runtime/release.rb b/qa/qa/runtime/release.rb
new file mode 100644
index 00000000000..d64b478a41a
--- /dev/null
+++ b/qa/qa/runtime/release.rb
@@ -0,0 +1,45 @@
+module QA
+  module Runtime
+    ##
+    # Class that is responsible for plugging CE/EE extensions in, depending on
+    # environment variable GITLAB_RELEASE that should be present in the runtime
+    # environment.
+    #
+    # We need that to reduce the probability of conflicts when merging
+    # CE to EE.
+    #
+    class Release
+      UnspecifiedReleaseError = Class.new(StandardError)
+
+      def initialize(version = ENV['GITLAB_RELEASE'])
+        @version = version.to_s.upcase
+
+        unless %w[CE EE].include?(@version)
+          raise UnspecifiedReleaseError, 'GITLAB_RELEASE env not defined!'
+        end
+
+        begin
+          require "#{version.downcase}/strategy"
+        rescue LoadError
+          # noop
+        end
+      end
+
+      def has_strategy?
+        QA.const_defined?("#{@version}::Strategy")
+      end
+
+      def strategy
+        QA.const_get("#{@version}::Strategy")
+      end
+
+      def self.method_missing(name, *args)
+        @release ||= self.new
+
+        if @release.has_strategy?
+          @release.strategy.public_send(name, *args)
+        end
+      end
+    end
+  end
+end