use modified opal logger

logger was having bizarre format errors
copied and simplified (to get on)

lib/util/logging.rb

@@ -0,0 +1,52 @@
+# a simple module to be included into a class that want to log
+#
+# use the standard logger and the class name as the program name
+#
+# The standard functions are available on the log object
+# And the log level may be set after inclusion with level function (that takes symbols)
+
+require_relative "logger"
+
+module Util
+  module Logging
+    def self.included(base)
+      base.extend(Methods)
+    end
+    def log
+      self.class.log
+    end
+
+    module Methods
+      def log
+        return @logger if @logger
+        @logger = Logger.new log_stream
+        @logger.progname = self.name.split("::").last
+        @logger.level = Logger::INFO
+        @logger
+      end
+      def log_level l
+        log.level = case l
+                      when :unknown
+                        Logger::UNKNOWN
+                      when :fatal
+                        Logger::FATAL
+                      when :error
+                        Logger::ERROR
+                      when :warn
+                        Logger::WARN
+                      when :info
+                        Logger::INFO
+                      when :debug
+                        Logger::DEBUG
+                      else
+                        raise "unknown log level #{l}"
+                      end
+      end
+
+      private
+      def log_stream
+         STDOUT
+      end
+    end
+  end
+end