Merge pull request #355 from Toflar/composer-selfupdate

Added composer selfupdate command

src/Task/BuiltIn/Composer/SelfUpdateTask.php

@@ -0,0 +1,146 @@
+<?php
+/*
+ * This file is part of the Magallanes package.
+ *
+ * (c) Andrés Montañez <andres@andresmontanez.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Mage\Task\BuiltIn\Composer;
+
+use Symfony\Component\Process\Process;
+use Mage\Task\AbstractTask;
+
+/**
+ * Composer Task - Self update
+ *
+ * @author Yanick Witschi <https://github.com/Toflar>
+ */
+class SelfUpdateTask extends AbstractTask
+{
+    /**
+     * Only used for unit tests.
+     *
+     * @var \DateTime
+     */
+    private $dateToCompare;
+
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return 'composer/selfupdate';
+    }
+
+    /**
+     * @return string
+     */
+    public function getDescription()
+    {
+        return '[Composer] Selfupdate';
+    }
+
+    /**
+     * @return bool
+     */
+    public function execute()
+    {
+        $options = $this->getOptions();
+        $days = $options['days'];
+        $versionCommand = sprintf('%s --version', $options['path']);
+
+        /** @var Process $process */
+        $process = $this->runtime->runCommand(trim($versionCommand));
+
+        if (!$process->isSuccessful()) {
+            return false;
+        }
+
+        $dt = $this->extractDate($process->getOutput());
+
+        // Date could not be extracted, always run update
+        if (false === $dt) {
+            return $this->selfUpdate($options);
+        }
+
+        // Check age
+        if (!$this->isOlderThan($dt, $days)) {
+            return true;
+        }
+
+        return $this->selfUpdate($options);
+    }
+
+    /**
+     * This tasks obviously always takes the current date to compare the age
+     * of the composer.phar. This method is used for unit test purposes
+     * only.
+     *
+     * @param \DateTime $dateToCompare
+     */
+    public function setDateToCompare(\DateTime $dateToCompare)
+    {
+        $this->dateToCompare = $dateToCompare;
+    }
+
+    /**
+     * @param \DateTime $dt
+     * @param int       $days
+     *
+     * @return bool
+     */
+    protected function isOlderThan(\DateTime $dt, $days)
+    {
+        $dtComp = new \DateTime($days . ' days ago');
+
+        if (null !== $this->dateToCompare) {
+            $dtComp = $this->dateToCompare;
+        }
+
+        return $dt < $dtComp;
+    }
+
+    /**
+     * @param array $options
+     *
+     * @return bool
+     */
+    protected function selfUpdate(array $options)
+    {
+        $selfupdateCommand = sprintf('%s selfupdate %s', $options['path'], $options['release']);
+
+        /** @var Process $process */
+        $process = $this->runtime->runCommand(trim($selfupdateCommand));
+
+        return $process->isSuccessful();
+    }
+
+    /**
+     * @param string $output
+     *
+     * @return \DateTime|false
+     */
+    protected function extractDate($output)
+    {
+        $date = substr($output, -19);
+
+        return \DateTime::createFromFormat('Y-m-d H:i:s', $date);
+    }
+
+    /**
+     * @return array
+     */
+    protected function getOptions()
+    {
+        $options = array_merge(
+            ['path' => 'composer', 'release' => '', 'days' => 30],
+            $this->runtime->getMergedOption('composer'),
+            $this->options
+        );
+
+        return $options;
+    }
+}