Print a warning when in dry run mode

lib/producer/core/env.rb

@@ -27,14 +27,14 @@ module Producer
       def logger
         @logger ||= begin
           logger = Logger.new(output)
-          logger.level = verbose? ? Logger::INFO : Logger::ERROR
+          logger.level = verbose? ? Logger::INFO : Logger::WARN
           logger.formatter = LoggerFormatter.new
           logger
         end
       end
 
-      def log(message)
-        logger.info message
+      def log(message, severity = :info)
+        logger.send severity, message
       end
 
       def verbose?

lib/producer/core/logger_formatter.rb

@@ -2,7 +2,14 @@ module Producer
   module Core
     class LoggerFormatter < Logger::Formatter
       def call(severity, datetime, progname, message)
-        message + "\n"
+        prefix(severity) + message + "\n"
+      end
+
+
+      private
+
+      def prefix(severity)
+        severity == 'WARN' ? 'Warning: ' : ''
       end
     end
   end

lib/producer/core/worker.rb

@@ -1,6 +1,9 @@
 module Producer
   module Core
     class Worker
+      DRY_RUN_WARNING =
+        'running in dry run mode, actions will NOT be applied'.freeze
+
       attr_accessor :env
 
       def initialize(env)
@@ -8,6 +11,8 @@ module Producer
       end
 
       def process(tasks)
+        env.log DRY_RUN_WARNING, :warn if env.dry_run?
+
         tasks.each { |t| process_task t }
       end