Improve coding standards

lib/producer/core/cli.rb

@@ -1,10 +1,10 @@
 module Producer
   module Core
     class CLI
-      attr_reader :arguments
-
       USAGE = "Usage: #{File.basename $0} recipe_file"
 
+      attr_reader :arguments
+
       def initialize(arguments, stdout = $stdout)
         @stdout     = stdout
         @arguments  = arguments

lib/producer/core/recipe.rb

@@ -1,11 +1,13 @@
 module Producer
   module Core
     class Recipe
-      attr_accessor :tasks
+      class << self
-
+        def evaluate_from_file(filepath, env)
-      def self.evaluate_from_file(filepath, env)
           DSL.evaluate(File.read(filepath), env)
         end
+      end
+
+      attr_accessor :tasks
 
       def initialize(tasks = [])
         @tasks = tasks

lib/producer/core/recipe/dsl.rb

@@ -2,12 +2,14 @@ module Producer
   module Core
     class Recipe
       class DSL
-        attr_reader :tasks
+        class << self
-
+          def evaluate(code, env)
-        def self.evaluate(code, env)
             dsl = new(code).evaluate(env)
             Recipe.new(dsl.tasks)
           end
+        end
+
+        attr_reader :tasks
 
         def initialize(code = nil, &block)
           @code   = code

lib/producer/core/task.rb

@@ -1,11 +1,13 @@
 module Producer
   module Core
     class Task
-      attr_reader :name, :actions, :condition
+      class << self
-
+        def evaluate(name, env, &block)
-      def self.evaluate(name, env, &block)
           DSL.evaluate(name, env, &block)
         end
+      end
+
+      attr_reader :name, :actions, :condition
 
       def initialize(name, actions = [], condition = true)
         @name       = name