Pass root Ci config entry to each subsequent entry

lib/gitlab/ci/config.rb

@@ -13,7 +13,7 @@ module Gitlab
         end
         @config = loader.load
-        @global = Node::Global.new(@config, self)
+        @global = Node::Global.new(@config)
         @global.process!
       end

lib/gitlab/ci/config/node/entry.rb

@@ -7,14 +7,14 @@ module Gitlab
           attr_reader :value, :nodes, :parent
-          def initialize(value, config, parent = nil)
+          def initialize(value, root = nil, parent = nil)
             @value = value
-            @config = config
+            @root = root
             @parent = parent
             @nodes, @errors = [], []
             keys.each_key do |key|
-              instance_variable_set("@#{key}", Null.new(nil, config, self))
+              instance_variable_set("@#{key}", Null.new(nil, root, self))
             end
           end
@@ -24,7 +24,7 @@ module Gitlab
             keys.each do |key, entry_class|
               next unless @value.has_key?(key)
-              entry = entry_class.new(@value[key], @config, self)
+              entry = entry_class.new(@value[key], @root, self)
               instance_variable_set("@#{key}", entry)
               @nodes.append(entry)
             end
@@ -42,7 +42,7 @@ module Gitlab
           end
           def leaf?
-            keys.none?
+            keys.none? # TODO || !@value.is_a?(Hash)
           end
           def keys

spec/lib/gitlab/ci/config/node/before_script_spec.rb

 require 'spec_helper'
 describe Gitlab::Ci::Config::Node::BeforeScript do
-  let(:entry) { described_class.new(value, config) }
-  let(:config) { double('config') }
+  let(:entry) { described_class.new(value, double)}
   describe '#validate!' do
     before { entry.validate! }

spec/lib/gitlab/ci/config/node/global_spec.rb

 require 'spec_helper'
 describe Gitlab::Ci::Config::Node::Global do
-  let(:global) { described_class.new(hash, config) }
-  let(:config) { double('Config') }
+  let(:global) { described_class.new(hash) }
   describe '#keys' do
     it 'can contain global config keys' do