Port `read_cross_project` ability from EE

1 files changed, 25 insertions, 0 deletions

diff --git a/config/initializers/0_as_concern.rb b/config/initializers/0_as_concern.rb
new file mode 100644
index 00000000000..40232bd6252
--- /dev/null
+++ b/config/initializers/0_as_concern.rb
@@ -0,0 +1,25 @@
+# This module is based on: https://gist.github.com/bcardarella/5735987
+
+module Prependable
+  def prepend_features(base)
+    if base.instance_variable_defined?(:@_dependencies)
+      base.instance_variable_get(:@_dependencies) << self
+      false
+    else
+      return false if base < self
+
+      super
+      base.singleton_class.send(:prepend, const_get('ClassMethods')) if const_defined?(:ClassMethods)
+      @_dependencies.each { |dep| base.send(:prepend, dep) } # rubocop:disable Gitlab/ModuleWithInstanceVariables
+      base.class_eval(&@_included_block) if instance_variable_defined?(:@_included_block) # rubocop:disable Gitlab/ModuleWithInstanceVariables
+    end
+  end
+end
+
+module ActiveSupport
+  module Concern
+    prepend Prependable
+
+    alias_method :prepended, :included
+  end
+end