lib/nanoc/cli/logger.rb in nanoc-4.9.0 vs lib/nanoc/cli/logger.rb in nanoc-4.9.1

@@ -26,10 +26,11 @@
     # @return [Symbol] The log level
     attr_accessor :level
 
     def initialize
       @level = :high
+      @mutex = Mutex.new
     end
 
     # Logs a file-related action.
     #
     # @param [:high, :low] level The importance of this action
@@ -61,13 +62,14 @@
     #
     # @param [#puts] io The stream to which the message should be written
     #
     # @return [void]
     def log(level, message, io = $stdout)
-      # Don't log when logging is disabled
       return if @level == :off
+      return if @level != :low && @level != level
 
-      # Log when level permits it
-      io.puts(message) if @level == :low || @level == level
+      @mutex.synchronize do
+        io.puts(message)
+      end
     end
   end
 end