refactored Autoloader; added support for json encoded format for environment "hosts" option

Mage/Autoload.php

@@ -20,34 +20,40 @@ class Autoload
 	/**
 	 * Autoload a Class by it's Class Name
 	 * @param string $className
+     * @return boolean
 	 */
-    public static function autoload($className)
+    public function autoLoad($className)
     {
+        $className = ltrim($className, '/');
+        $postfix             = '/' . str_replace(array('_', '\\'), '/', $className . '.php');
+
+        //Try to load a normal Mage class (or Task). Think that Mage component is compiled to .phar
         $baseDir = dirname(dirname(__FILE__));
-        $classFile = $baseDir . '/' . str_replace(array('_', '\\'), '/', $className . '.php');
-        require_once $classFile;
+        $classFileWithinPhar = $baseDir . $postfix;
+        if($this->isReadable($classFileWithinPhar))
+        {
+            require_once $classFileWithinPhar;
+            return true;
+        }
+
+        //Try to load a custom Task or Class. Notice that the path is absolute to CWD
+        $classFileOutsidePhar = getcwd() . '/.mage/tasks' . $postfix;
+        if($this->isReadable($classFileOutsidePhar)){
+            require_once $classFileOutsidePhar;
+            return true;
+        }
+
+        return false;
     }
 
     /**
-     * Checks if a Class can be loaded.
-     * @param string $className
+     * Checks if a file can be read.
+     * @param string $filePath
      * @return boolean
      */
-    public static function isLoadable($className)
+    public function isReadable($filePath)
     {
-        $baseDir = dirname(dirname(__FILE__));
-        $classFile = $baseDir . '/' . str_replace(array('_', '\\'), '/', $className . '.php');
-        return (file_exists($classFile) && is_readable($classFile));
-    }
-
-    /**
-     * Loads a User's Tasks
-     * @param string $taskName
-     */
-    public static function loadUserTask($taskName)
-    {
-        $classFile = getcwd() . '/.mage/tasks/' . ucfirst($taskName) . '.php';
-        require_once $classFile;
+        return is_readable($filePath);
     }
 
 }

Mage/Command/Factory.php

@@ -38,18 +38,14 @@ class Factory
 
         $commandName = str_replace(' ', '_', ucwords(str_replace('/', ' ', $commandName)));
         $className = 'Mage\\Command\\BuiltIn\\' . $commandName . 'Command';
-        if (Autoload::isLoadable($className)) {
-            $instance = new $className;
-            assert($instance instanceOf AbstractCommand);
-            $instance->setConfig($config);
-        } else {
-            throw new Exception('Command not found.');
-        }
-
-        if(!($instance instanceOf AbstractCommand)) {
+        /** @var AbstractCommand $instance */
+        $instance = new $className;
+        if(!is_a($instance, "Mage\Command\AbstractCommand")) {
             throw new Exception('The command ' . $commandName . ' must be an instance of Mage\Command\AbstractCommand.');
         }
 
+        $instance->setConfig($config);
+
         return $instance;
     }
 }

Mage/Config.php

@@ -24,7 +24,8 @@ use Exception;
  */
 class Config
 {
-	/**
+    const HOST_NAME_LENGTH = 1000;
+    /**
 	 * Arguments loaded
 	 * @var array
 	 */
@@ -353,13 +354,7 @@ class Config
             if (is_array($envConfig['hosts'])) {
                 $hosts = (array) $envConfig['hosts'];
             } else if (is_string($envConfig['hosts']) && file_exists($envConfig['hosts']) && is_readable($envConfig['hosts'])) {
-                $fileContent = fopen($envConfig['hosts'], 'r');
-                while (($host = fgets($fileContent)) == true) {
-                    $host = trim($host);
-                    if ($host != '') {
-                        $hosts[] = $host;
-                    }
-                }
+                $hosts = $this->getHostsFromFile($envConfig['hosts']);
             }
         }
 
@@ -565,7 +560,7 @@ class Config
      * @param mixed $default
      * @return mixed
      */
-    protected function getEnvironmentOption($option, $default = array())
+    public function getEnvironmentOption($option, $default = array())
     {
         $config = $this->getEnvironmentConfig();
         if (isset($config[$option])) {
@@ -608,4 +603,33 @@ class Config
         return $this->environmentConfig;
     }
 
+    /**
+     * @param string $filePath
+     *
+     * @return array
+     */
+    protected function getHostsFromFile($filePath)
+    {
+        $handle = fopen($filePath, 'r');
+
+        $hosts = array();
+
+        try {
+            $fileContent = stream_get_contents($handle);
+            $hosts = json_decode($fileContent);
+        } catch (Exception $e) {
+
+            rewind($handle);
+            //do it old-style: one host per line
+            while (($host = stream_get_line($handle, self::HOST_NAME_LENGTH)) !== false) {
+                $host = trim($host);
+                if (!empty($host)) {
+                    $hosts[] = $host;
+                }
+            }
+        }
+
+        return $hosts;
+    }
+
 }

Mage/Task/Factory.php

@@ -48,22 +48,15 @@ class Factory
         $taskName = str_replace(' ', '', $taskName);
 
         if (strpos($taskName, '/') === false) {
-            Autoload::loadUserTask($taskName);
-            $className = 'Task\\' . ucfirst($taskName);
+            $className = $taskName;
 
         } else {
-            $taskName = str_replace(' ', '\\', ucwords(str_replace('/', ' ', $taskName)));
-            $className = 'Mage\\Task\\BuiltIn\\' . $taskName . 'Task';
+            $className = 'Mage\\Task\\BuiltIn\\' . str_replace(' ', '\\', ucwords(str_replace('/', ' ', $taskName))) . 'Task';
         }
 
+        $instance = new $className($taskConfig, $inRollback, $stage, $taskParameters);
 
-        if (class_exists($className) || Autoload::isLoadable($className)) {
-        	$instance = new $className($taskConfig, $inRollback, $stage, $taskParameters);
-        } else {
-        	throw new ErrorWithMessageException('The Task "' . $taskName . '" doesn\'t exists.');
-        }
-
-        if (!($instance instanceOf AbstractTask)) {
+        if (!is_a($instance,'Mage\Task\AbstractTask')) {
         	throw new Exception('The Task ' . $taskName . ' must be an instance of Mage\Task\AbstractTask.');
         }
 

bin/mage

@@ -9,6 +9,8 @@
 * file that was distributed with this source code.
 */
 
+use Mage\Autoload;
+
 date_default_timezone_set('UTC');
 
 $baseDir = dirname(dirname(__FILE__));
@@ -18,7 +20,8 @@ define('MAGALLANES_DIRECTORY', $baseDir);
 
 // Preload
 require_once $baseDir . '/Mage/Autoload.php';
-spl_autoload_register(array('Mage\\Autoload', 'autoload'));
+$loader = new Autoload();
+spl_autoload_register(array($loader, 'autoLoad'));
 
 // Clean arguments
 array_shift($argv);