public static function loadMacros() {
		
		// load defaults
		$macroDir = Config::getOption("sourceDir").DIRECTORY_SEPARATOR."_macros";
		$macroExt = Config::getOption("twigMacroExt");
		$macroExt = $macroExt ? $macroExt : "macro.twig";
		
		if (is_dir($macroDir)) {
			
			// loop through some macro containing dir and run...
			$finder = new Finder();
			$finder->files()->name("*.".$macroExt)->in($macroDir);
			$finder->sortByName();
			foreach ($finder as $file) {
				
				// see if the file should be ignored
				$baseName = $file->getBasename();
				if ($baseName[0] != "_") {
					
					// add the macro to the global context
					self::$instance->addGlobal($file->getBasename(".".$macroExt), self::$instance->loadTemplate($baseName));
					
				}
				
			}
			
		}
		
	}