Add minor readability, style improvements in CI config

lib/ci/gitlab_ci_yaml_processor.rb

@@ -8,7 +8,8 @@ module Ci
 
     def initialize(config, path = nil)
       @ci_config = Gitlab::Ci::Config.new(config)
-      @config, @path = @ci_config.to_hash, path
+      @config = @ci_config.to_hash
+      @path = path
 
       unless @ci_config.valid?
         raise ValidationError, @ci_config.errors.first
@@ -120,8 +121,6 @@ module Ci
     end
 
     def validate_job!(name, job)
-      raise ValidationError, "Unknown parameter: #{name}" unless job.is_a?(Hash) && job.has_key?(:script)
-
       validate_job_stage!(name, job) if job[:stage]
       validate_job_dependencies!(name, job) if job[:dependencies]
     end

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

@@ -9,12 +9,13 @@ module Gitlab
           include Validatable
           include Attributable
 
-          attributes :name, :untracked, :paths, :when, :expire_in
+          ALLOWED_KEYS = %i[name untracked paths when expire_in]
+
+          attributes ALLOWED_KEYS
 
           validations do
             validates :config, type: Hash
-            validates :config,
-              allowed_keys: %i[name untracked paths when expire_in]
+            validates :config, allowed_keys: ALLOWED_KEYS
 
             with_options allow_nil: true do
               validates :name, type: String

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

@@ -7,7 +7,7 @@ module Gitlab
 
           class_methods do
             def attributes(*attributes)
-              attributes.each do |attribute|
+              attributes.flatten.each do |attribute|
                 define_method(attribute) do
                   return unless config.is_a?(Hash)
 

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

@@ -24,7 +24,7 @@ module Gitlab
             return unless valid?
 
             compose!
-            @entries.each_value(&:process!)
+            descendants.each(&:process!)
           end
 
           def leaf?
@@ -44,7 +44,7 @@ module Gitlab
           end
 
           def errors
-            @validator.messages + @entries.values.flat_map(&:errors)
+            @validator.messages + descendants.flat_map(&:errors)
           end
 
           def value

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

@@ -9,13 +9,14 @@ module Gitlab
           include Configurable
           include Attributable
 
+          ALLOWED_KEYS = %i[tags script only except type image services allow_failure
+                            type stage when artifacts cache dependencies before_script
+                            after_script variables environment]
+
           attributes :tags, :allow_failure, :when, :environment
 
           validations do
-            validates :config, allowed_keys:
-              %i[tags script only except type image services allow_failure
-                 type stage when artifacts cache dependencies before_script
-                 after_script variables environment]
+            validates :config, allowed_keys: ALLOWED_KEYS
 
             validates :config, presence: true
             validates :name, presence: true

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

@@ -18,10 +18,14 @@ module Gitlab
             end
 
             def has_visible_job?
-              config.any? { |key, _| !key.to_s.start_with?('.') }
+              config.any? { |name, _| !hidden?(name) }
             end
           end
 
+          def hidden?(name)
+            name.to_s.start_with?('.')
+          end
+
           private
 
           def compose!
@@ -37,10 +41,6 @@ module Gitlab
               @entries[name] = factory.create!
             end
           end
-
-          def hidden?(name)
-            name.to_s.start_with?('.')
-          end
         end
       end
     end

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

@@ -5,7 +5,7 @@ module Gitlab
         ##
         # This class represents an undefined and unspecified entry node.
         #
-        # It decorates original entry adding method that idicates it is
+        # It decorates original entry adding method that indicates it is
         # unspecified.
         #
         class Undefined < SimpleDelegator

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

@@ -31,7 +31,7 @@ describe Gitlab::Ci::Config::Node::Artifacts do
           end
         end
 
-        context 'when there is uknown key' do
+        context 'when there is an unknown key present' do
           let(:config) { { test: 100 } }
 
           it 'reports error' do