New LOCK feature.

Mage/Console.php

@@ -48,6 +48,12 @@ class Mage_Console
 
         } else if ($this->_args[0] == 'init') {
             $this->_action = 'init';
+
+        } else if ($this->_args[0] == 'lock') {
+            $this->_action = 'lock';
+
+        } else if ($this->_args[0] == 'unlock') {
+                $this->_action = 'unlock';
         }
 
         foreach ($this->_args as $argument) {
@@ -158,19 +164,21 @@ class Mage_Console
                         Mage_Console::output('<red>You must indicate a task</red>', 0, 2);
                         break;
                     }
-                    switch ($this->_args[1]) {
-                        case 'list':
-                            $task->setAction($this->_args[1]);
-                            break;
 
-                        case 'rollback':
+                    if ($this->_args[1] == 'list') {
+                            $task->setAction('list');
+
+                    } else if ($this->_args[1] == 'rollback') {
                         if (!isset($this->_args[2])) {
                             Mage_Console::output('<red>You must indicate a release point</red>', 0, 2);
-                                break 2;
+                            break;
                         }
 
                         $task->setAction($this->_args[1]);
                         $task->setRelease($this->_args[2]);
+
+                    } else {
+                        Mage_Console::output('<red>Invalid Releases task</red>', 0, 2);
                         break;
                     }
                     $task->run($config);
@@ -191,6 +199,16 @@ class Mage_Console
                     $task->run();
                     break;
 
+                case 'lock';
+                    $task = new Mage_Task_Lock;
+                    $task->run($config);
+                    break;
+
+                case 'unlock';
+                    $task = new Mage_Task_Lock;
+                    $task->run($config, true);
+                    break;
+
                 case 'upgrade';
                     $task = new Mage_Task_Upgrade;
                     $task->run();

Mage/Task/Deploy.php

@@ -18,11 +18,17 @@ class Mage_Task_Deploy
         $this->_startTime = time();
         $this->_config = $config;
 
-        if ($config->getEnvironment() == '') {
+        if ($config->getEnvironmentName() == '') {
             Mage_Console::output('<red>You must specify an environment</red>', 0, 2);
             return;
         }
 
+        $lockFile = '.mage/' . $config->getEnvironmentName() . '.lock';
+        if (file_exists($lockFile)) {
+            Mage_Console::output('<red>This environment is locked!</red>', 0, 2);
+            return;
+        }
+
         // Run Pre-Deployment Tasks
         $this->_runNonDeploymentTasks('pre-deploy', $config, 'Pre-Deployment');
 

Mage/Task/Lock.php

@@ -0,0 +1,23 @@
+<?php
+class Mage_Task_Lock
+{
+    private $_config = null;
+
+    public function run(Mage_Config $config, $unlock = false)
+    {
+        $this->_config = $config;
+
+        if ($config->getEnvironmentName() == '') {
+            Mage_Console::output('<red>You must specify an environment</red>', 0, 2);
+            return;
+        }
+
+        $lockFile = '.mage/' . $config->getEnvironmentName() . '.lock';
+        if (file_exists($lockFile)) {
+            @unlink($lockFile);
+        }
+
+        Mage_Console::output('Unlocked deployment to <light_purple>' . $config->getEnvironmentName() . '</light_purple> environment', 1, 2);
+    }
+
+}

Mage/Task/Releases.php

@@ -31,11 +31,17 @@ class Mage_Task_Releases
     {
         $this->_config = $config;
 
-        if ($config->getEnvironment() == '') {
+        if ($config->getEnvironmentName() == '') {
             Mage_Console::output('<red>You must specify an environment</red>', 0, 2);
             return;
         }
 
+        $lockFile = '.mage/' . $config->getEnvironmentName() . '.lock';
+        if (file_exists($lockFile)) {
+            Mage_Console::output('<red>This environment is locked!</red>', 0, 2);
+            return;
+        }
+
         // Run Tasks for Deployment
         $hosts = $config->getHosts();