Added logger cligen integration

src/logger.cr

@@ -3,6 +3,22 @@ require "colorize"
 
 module Logger
 
+  macro finished
+    {% if @top_level.has_constant?("CliGen") %}
+      {% levels = LOG_LEVELS.map{|level| [level.stringify.downcase,level]}.to_h %}
+      {% for level in %w[ max min ] %}
+        CliGen.add_default_flag(long: "--{{level}} {{level.upcase}}", "Configure the {{level}}imum log level (default is: #{@@{{level}}_level)})"){|level|
+            levels = {{levels}}.to_h
+            abort "ERROR : --{{level}}_level : Level(#{level}) is not valid. (valid: #{labels.keys.join(", ")})" unless levels.has_key?(level)
+            @@{{level}}_level = LOG_LEVELS[lables[level]]
+        }
+      {% end %}
+      CliGen.add_default_flag(short: "-d", long: "--debug", "Tell the logger that we should enable full debug logging"){
+        Logger.debug = true
+      }
+    {% end %}
+  end
+
   annotation LoggerWatcher
   end