[Nostromo] Add File System tasks and tests

src/Mage/Task/BuiltIn/FS/AbstractFileTask.php

@@ -0,0 +1,59 @@
+<?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\FS;
+
+use Mage\Runtime\Exception\RuntimeException;
+use Mage\Task\AbstractTask;
+
+/**
+ * File System Task - Abstract Base class for File Operations
+ *
+ * @author Andrés Montañez <andresmontanez@gmail.com>
+ */
+abstract class AbstractFileTask extends AbstractTask
+{
+    protected function getOptions()
+    {
+        $mandatory = $this->getParameters();
+
+        foreach ($mandatory as $parameter) {
+            if (!array_key_exists($parameter, $this->options)) {
+                throw new RuntimeException(sprintf('Parameter "%s" is not defined', $parameter));
+            }
+        }
+
+        return $this->options;
+    }
+
+    abstract protected function getParameters();
+
+    protected function getFile($file)
+    {
+        $mapping = [
+            '%environment%' => $this->runtime->getEnvironment(),
+        ];
+
+        if ($this->runtime->getWorkingHost()) {
+            $mapping['%host%'] = $this->runtime->getWorkingHost();
+        }
+
+        if ($this->runtime->getReleaseId()) {
+            $mapping['%release%'] = $this->runtime->getReleaseId();
+        }
+
+        $options = $this->getOptions();
+        return str_replace(
+            array_keys($mapping),
+            array_values($mapping),
+            $options[$file]
+        );
+    }
+}