module BuildTool


    #
    # Mixin which implements basic plugin functionality.
    #
    module PluginBase

        # Class methods
        module ClassMethods

            def register_plugin( child )
                logger.debug "Registering plugin #{child}"
                child.registered_plugins << child
            end

            # Called if the class is inherited
            def inherited( child )
                child.register_plugin( child )
            end

            def registered_plugins
                @@registered_plugins
            end

            def registered_plugins=( val )
                @@registered_plugins = val
            end

        end


        # Mixin the class methods
        def self.included( base )
            base.extend( ClassMethods )
            base.registered_plugins = Array.new
            # puts "#{base} #{base.registered_plugins.inspect}"
        end

    end # class PluginBase


end