refactor config handling in commands

Author: DannyBen

lib/bashly/commands/base.rb

@@ -6,10 +6,16 @@ module Commands
     class Base < MisterBin::Command
       include AssetHelper
 
+      def config
+        @config ||= Config.new "#{Settings.source_dir}/bashly.yml"
+      end
+
+      def config_validator
+        @config_validator ||= ConfigValidator.new config
+      end
+
       def validate_config
-        config = Config.new "#{Settings.source_dir}/bashly.yml"
-        validator = ConfigValidator.new config
-        validator.validate
+        config_validator.validate
       end
     end
   end

lib/bashly/commands/generate.rb

@@ -128,10 +128,6 @@ def master_script_path
         "#{Settings.target_dir}/#{command.name}"
       end
 
-      def config
-        @config ||= Config.new "#{Settings.source_dir}/bashly.yml"
-      end
-
       def command
         @command ||= Script::Command.new config
       end

lib/bashly/commands/preview.rb

@@ -9,8 +9,8 @@ class Preview < Base
       environment "BASHLY_SOURCE_DIR", "The path containing the bashly configuration and source files [default: src]"
 
       def run
-        config = Config.new "#{Settings.source_dir}/bashly.yml"
-        command = Script::Command.new(config)
+        validate_config
+        command = Script::Command.new config
         script = Script::Wrapper.new command
         puts script.code
       end