adding addPaths support

Author: dmolsen

src/PatternLab/PatternEngine/Twig/Loaders/PatternLoader.php

@@ -66,7 +66,8 @@ public function __construct($options = array()) {
 
 		// add the paths to the filesystem loader if the paths existed
 		if (count($filesystemLoaderPaths) > 0) {
-			$loaders[]    = new \Twig_Loader_Filesystem($filesystemLoaderPaths);
+			$filesystemLoader = new \Twig_Loader_Filesystem($filesystemLoaderPaths);
+			$loaders[] = TwigUtil::addPaths($filesystemLoader, $patternSourceDir);
 		}
 
 		$loaders[]      = new \Twig_Loader_String();

src/PatternLab/PatternEngine/Twig/TwigUtil.php

@@ -18,6 +18,26 @@
 
 class TwigUtil {
 
+	/**
+	* Registering each directory under `_patterns/` as a namespace. For example, `_patterns/00-atoms/` as `@atoms`
+	* @param  {Instance}       an instance of the filesystem Loader
+	* @param  {String}         the path to the pattern directory
+	*
+	* @return {Instance}       an instance of the filesystem Loader
+	*/
+	public static function addPaths($filesystemLoader, $patternSourceDir) {
+		
+		$finder = new Finder();
+		$finder->directories()->depth(0)->in($patternSourceDir);
+		foreach ($finder as $file) {
+			$patternBits = explode("-",$file->getRelativePathName(),2);
+			$patternTypePath = (((int)$patternBits[0] != 0) || ($patternBits[0] == '00')) ? $patternBits[1] : $pattern;
+			$filesystemLoader->addPath($file->getPathName(), $patternTypePath);
+		}
+		
+		return $filesystemLoader;
+		
+	}
 	/**
 	* Load custom date formats for Twig
 	* @param  {Instance}       an instance of the twig engine