Tweak on yaml parser. Added option for ssh port.

Mage/Config.php

@@ -116,7 +116,7 @@ class Mage_Config
         $config = $this->getEnvironment();
 
         if (isset($config[$type]) && isset($config[$type][$stage])) {
-            $tasks = (array) $config[$type][$stage];
+            $tasks = ($config[$type][$stage] ? (array) $config[$type][$stage] : array());
         }
 
         return $tasks;

Mage/Task/BuiltIn/Deployment/Rsync.php

@@ -36,6 +36,7 @@ class Mage_Task_BuiltIn_Deployment_Rsync
         }
 
         $command = 'rsync -avz '
+                 . '--rsh="ssh -p' . $this->_config->deployment('port', '22') . '" '
                  . $this->_excludes(array_merge($excludes, $userExcludes)) . ' '
                  . $this->_config->deployment('from') . ' '
                  . $this->_config->deployment('user') . '@' . $this->_config->getHost() . ':' . $deployToDirectory;

Mage/Task/TaskAbstract.php

@@ -45,7 +45,8 @@ abstract class Mage_Task_TaskAbstract
             $releasesDirectory = '';
         }
         
-        $localCommand = 'ssh -q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no '
+        $localCommand = 'ssh -p ' . $this->_config->deployment('port', '22') . ' '
+                      . '-q -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no '
                       . $this->_config->deployment('user') . '@' . $this->_config->getHost() . ' '
                       . '"cd ' . rtrim($this->_config->deployment('to'), '/') . $releasesDirectory . ' && '
                       . $command . '"';