Added YiiBase::importNamespaces().

framework/YiiBase.php

@@ -138,6 +138,30 @@ class YiiBase
 		}
 	}
 
+	/**
+	 * Imports a set of namespaces.
+	 *
+	 * By importing a namespace, the method will create an alias for the directory corresponding
+	 * to the namespace. For example, if "foo\bar" is a namespace associated with the directory
+	 * "path/to/foo/bar", then an alias "@foo/bar" will be created for this directory.
+	 *
+	 * This method is typically invoked in the bootstrap file to import the namespaces of
+	 * the installed extensions. By default, Composer, when installing new extensions, will
+	 * generate such a mapping file which can be loaded and passed to this method.
+	 *
+	 * @param array $namespaces the namespaces to be imported. The keys are the namespaces,
+	 * and the values are the corresponding directories.
+	 */
+	public static function importNamespaces($namespaces)
+	{
+		foreach ($namespaces as $name => $path) {
+			if ($name !== '') {
+				$name = '@' . str_replace('\\', '/', $name);
+				static::setAlias($name, $path);
+			}
+		}
+	}
+
 	/**
 	 * Translates a path alias into an actual path.
 	 *

framework/base/Application.php

@@ -56,11 +56,6 @@ class Application extends Module
 	 * If this is false, layout will be disabled.
 	 */
 	public $layout = 'main';
-	/**
-	 * @var array list of installed extensions. The array keys are the extension names, and the array
-	 * values are the corresponding extension root source directories or path aliases.
-	 */
-	public $extensions = array();
 
 	private $_ended = false;
 
@@ -92,13 +87,6 @@ class Application extends Module
 			throw new InvalidConfigException('The "basePath" configuration is required.');
 		}
 
-		if (isset($config['extensions'])) {
-			foreach ($config['extensions'] as $name => $path) {
-				Yii::setAlias("@$name", $path);
-			}
-			unset($config['extensions']);
-		}
-
 		$this->registerErrorHandlers();
 		$this->registerCoreComponents();
 

framework/web/AssetBundle.php

@@ -89,7 +89,7 @@ class AssetBundle extends Object
 	 * @var array the options to be passed to [[AssetManager::publish()]] when the asset bundle
 	 * is being published.
 	 */
-	public $publishOption = array();
+	public $publishOptions = array();
 
 	/**
 	 * Initializes the bundle.
@@ -119,7 +119,7 @@ class AssetBundle extends Object
 		}
 
 		if ($this->sourcePath !== null) {
-			list ($this->basePath, $this->baseUrl) = $am->publish($this->sourcePath, $this->publishOption);
+			list ($this->basePath, $this->baseUrl) = $am->publish($this->sourcePath, $this->publishOptions);
 		}
 
 		foreach ($this->js as $js => $options) {