Use CI config errors from new processor in legacy one

lib/ci/gitlab_ci_yaml_processor.rb

@@ -14,7 +14,9 @@ module Ci
     attr_reader :before_script, :after_script, :image, :services, :path, :cache
     def initialize(config, path = nil)
-      @config = Gitlab::Ci::Config.new(config).to_hash
+      @ci_config = Gitlab::Ci::Config.new(config)
+      @config = @ci_config.to_hash
+
       @path = path
       initial_parsing
@@ -99,6 +101,10 @@ module Ci
     end
     def validate!
+      unless @ci_config.valid?
+        raise ValidationError, @ci_config.errors.first
+      end
+
       validate_global!
       @jobs.each do |name, job|
@@ -109,10 +115,6 @@ module Ci
     end
     def validate_global!
-      unless validate_array_of_strings(@before_script)
-        raise ValidationError, "before_script should be an array of strings"
-      end
-
       unless @after_script.nil? || validate_array_of_strings(@after_script)
         raise ValidationError, "after_script should be an array of strings"
       end

lib/gitlab/ci/config.rb

@@ -3,6 +3,8 @@ module Gitlab
     class Config
       class LoaderError < StandardError; end
+      delegate :valid?, :errors, to: :@global
+
       def initialize(config)
         loader = Loader.new(config)
@@ -11,6 +13,8 @@ module Gitlab
         end
         @config = loader.load
+        @global = Node::Global.new(@config, self)
+        @global.process!
       end
       def to_hash

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

@@ -18,7 +18,7 @@ module Gitlab
           def process!
             keys.each_pair do |key, entry|
               next unless @value.include?(key)
-              @nodes[key] = entry.new(@value[key], config, self)
+              @nodes[key] = entry.new(@value[key], @config, self)
             end
             nodes.each(&:process!)

spec/lib/gitlab/ci/config_spec.rb

@@ -29,17 +29,43 @@ describe Gitlab::Ci::Config do
         expect(config.to_hash).to eq hash
       end
+
+      describe '#valid?' do
+        it 'is valid' do
+          expect(config).to be_valid
+        end
+
+        it 'has no errors' do
+          expect(config.errors).to be_empty
+        end
+      end
     end
     context 'when config is invalid' do
-      let(:yml) { '// invalid' }
-
-      describe '.new' do
-        it 'raises error' do
-          expect { config }.to raise_error(
-            Gitlab::Ci::Config::LoaderError,
-            /Invalid configuration format/
-          )
+      context 'when yml is incorrect' do
+        let(:yml) { '// invalid' }
+
+        describe '.new' do
+          it 'raises error' do
+            expect { config }.to raise_error(
+              Gitlab::Ci::Config::LoaderError,
+              /Invalid configuration format/
+            )
+          end
+        end
+      end
+
+      context 'when config logic is incorrect' do
+        let(:yml) { 'before_script: "ls"' }
+
+        describe '#valid?' do
+          it 'is not valid' do
+            expect(config).not_to be_valid
+          end
+
+          it 'has errors' do
+            expect(config.errors).not_to be_empty
+          end
         end
       end
     end