dry-coded rollback command

src/Liip/RMT/Action/BaseAction.php

@@ -27,6 +27,14 @@ public function __construct($options = array())
      */
     abstract public function execute();
 
+    /**
+     * Rollback the effect of this action
+     */
+    public function rollback()
+    {
+        // assume there is nothing to do by default
+    }
+
     /**
      * Return the name of the action as it will be display to the user
      *

src/Liip/RMT/Action/VcsCommitAction.php

@@ -38,9 +38,19 @@ public function execute()
 
             return;
         }
-        $vcs->saveWorkingCopy(
-            str_replace('%version%', Context::getParam('new-version'), $this->options['commit-message'])
-        );
+        $vcs->saveWorkingCopy($this->getCommitMessage(Context::getParam('new-version')));
+        $this->confirmSuccess();
+    }
+
+    public function rollback()
+    {
+        $version = Context::get('version-persister')->getCurrentVersion();
+        Context::get('vcs')->revertLastCommit($this->getCommitMessage($version));
         $this->confirmSuccess();
     }
+
+    protected function getCommitMessage($version)
+    {
+        return str_replace('%version%', $version, $this->options['commit-message']);
+    }
 }

src/Liip/RMT/Action/VcsTagAction.php

@@ -27,4 +27,12 @@ public function execute()
         );
         $this->confirmSuccess();
     }
+
+    public function rollback()
+    {
+        $tag = Context::get('version-persister')->getCurrentVersionTag();
+        Context::get('vcs')->deleteTag($tag);
+        $this->confirmSuccess();
+    }
+
 }

src/Liip/RMT/Application.php

@@ -18,6 +18,7 @@
 use Liip\RMT\Command\CurrentCommand;
 use Liip\RMT\Command\ConfigCommand;
 use Liip\RMT\Command\InitCommand;
+use Liip\RMT\Command\RollbackCommand;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Output\OutputInterface;
 use Symfony\Component\Console\Application as BaseApplication;
@@ -50,6 +51,7 @@ public function __construct()
             // Add command that require the config file
             if (file_exists($this->getConfigFilePath())) {
                 $this->add(new ReleaseCommand());
+                $this->add(new RollbackCommand());
                 $this->add(new CurrentCommand());
                 $this->add(new ChangesCommand());
                 $this->add(new ConfigCommand());

src/Liip/RMT/Command/RollbackCommand.php

@@ -0,0 +1,60 @@
+<?php
+
+/*
+ * This file is part of the project RMT
+ *
+ * Copyright (c) 2013, Liip AG, http://www.liip.ch
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Liip\RMT\Command;
+
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Liip\RMT\Context;
+
+/**
+ * Rollback the last release
+ */
+class RollbackCommand extends BaseCommand
+{
+    /**
+     * {@inheritdoc}
+     */
+    protected function configure()
+    {
+        $this->setName('rollback');
+        $this->setDescription('Rollback the last release if there was no change since.');
+        $this->setHelp('The <comment>rollback</comment> should be used to cancel a previously done release.');
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        if (count(Context::get('vcs')->getLocalModifications()) > 0) {
+            Context::get('output')->writeln('<error>Local modifications found. Aborting.</error>');
+            return;
+        }
+
+        $tag = Context::get('version-persister')->getCurrentVersionTag();
+        $modifications = Context::get('vcs')->getAllModificationsSince($tag, false, false);
+        if (count($modifications) > 0) {
+            Context::get('output')->writeln('<error>There were commits since the last release. Aborting.</error>');
+            return;
+        }
+
+        $this->rollbackActionListIfExist('post-release-actions');
+        $this->rollbackActionListIfExist('pre-release-actions');
+    }
+
+    protected function rollbackActionListIfExist($name)
+    {
+        $actions = Context::getInstance()->getList($name);
+        $actions = array_reverse($actions);
+        foreach ($actions as $num => $action) {
+            $this->getOutput()->write(++$num.') '.$action->getTitle().' : ');
+            $action->rollback();
+        }
+    }
+}

src/Liip/RMT/VCS/Git.php

@@ -50,6 +50,11 @@ public function createTag($tagName)
         return $this->executeGitCommand("tag $tagName");
     }
 
+    public function deleteTag($tagName)
+    {
+        return $this->executeGitCommand("tag -d $tagName");
+    }
+
     public function publishTag($tagName, $remote = null)
     {
         $remote = $remote == null ? 'origin' : $remote;
@@ -68,6 +73,18 @@ public function saveWorkingCopy($commitMsg = '')
         $this->executeGitCommand("commit -m \"$commitMsg\"");
     }
 
+    public function revertLastCommit($commitMsg = null)
+    {
+        if (! is_null($commitMsg)) {
+            $msg = $this->executeGitCommand('log -1 --pretty=%B');
+            if (count($msg) != 1 || $msg[0] !== $commitMsg) {
+                return;
+            }
+        }
+
+        $this->executeGitCommand('reset --hard HEAD~1');
+    }
+
     public function getCurrentBranch()
     {
         $branches = $this->executeGitCommand('branch');

src/Liip/RMT/VCS/Hg.php

@@ -58,6 +58,11 @@ public function createTag($tagName)
         return $this->executeHgCommand("tag $tagName");
     }
 
+    public function deleteTag($tagName)
+    {
+        return $this->executeHgCommand("tag --remove $tagName");
+    }
+
     public function publishTag($tagName, $remote = null)
     {
         // nothing to do, tags are published with other changes
@@ -75,6 +80,17 @@ public function saveWorkingCopy($commitMsg = '')
         $this->executeHgCommand("commit -m \"$commitMsg\"");
     }
 
+    public function revertLastCommit($commitMsg = null)
+    {
+        if (! is_null($commitMsg)) {
+            $msg = $this->executeHgCommand('log -l 1 -T "{desc}"');
+            if (count($msg) != 1 || $msg[0] !== $commitMsg) {
+                return;
+            }
+        }
+
+        $this->executeHgCommand('reset --hard HEAD~1');    }
+
     public function getCurrentBranch()
     {
         $data = $this->executeHgCommand('branch');

src/Liip/RMT/VCS/VCSInterface.php

@@ -32,6 +32,13 @@ public function getTags();
      */
     public function createTag($tagName);
 
+    /**
+     * Delete a tag
+     *
+     * @param string $tagName
+     */
+    public function deleteTag($tagName);
+
     /**
      * Publish a new created tag
      *
@@ -78,6 +85,14 @@ public function getLocalModifications();
      */
     public function saveWorkingCopy($commitMsg = '');
 
+    /**
+     * Revert the last commit. If a message is given, only revert
+     * if the commit message matches.
+     *
+     * @param string|null $commitMsg
+     */
+    public function revertLastCommit($commitMsg = null);
+
     /**
      * Publish local modification
      *