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diff --git a/www/wiki/includes/shell/CommandFactory.php b/www/wiki/includes/shell/CommandFactory.php
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+<?php
+/**
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
+
+namespace MediaWiki\Shell;
+
+use ExecutableFinder;
+use Psr\Log\LoggerAwareTrait;
+use Psr\Log\NullLogger;
+
+/**
+ * Factory facilitating dependency injection for Command
+ *
+ * @since 1.30
+ */
+class CommandFactory {
+	use LoggerAwareTrait;
+
+	/** @var array */
+	private $limits;
+
+	/** @var string|bool */
+	private $cgroup;
+
+	/** @var bool */
+	private $doLogStderr = false;
+
+	/**
+	 * @var string|bool
+	 */
+	private $restrictionMethod;
+
+	/**
+	 * @var string|bool
+	 */
+	private $firejail;
+
+	/**
+	 * Constructor
+	 *
+	 * @param array $limits See {@see Command::limits()}
+	 * @param string|bool $cgroup See {@see Command::cgroup()}
+	 * @param string|bool $restrictionMethod
+	 */
+	public function __construct( array $limits, $cgroup, $restrictionMethod ) {
+		$this->limits = $limits;
+		$this->cgroup = $cgroup;
+		if ( $restrictionMethod === 'autodetect' ) {
+			// On Linux systems check for firejail
+			if ( PHP_OS === 'Linux' && $this->findFirejail() !== false ) {
+				$this->restrictionMethod = 'firejail';
+			} else {
+				$this->restrictionMethod = false;
+			}
+		} else {
+			$this->restrictionMethod = $restrictionMethod;
+		}
+		$this->setLogger( new NullLogger() );
+	}
+
+	private function findFirejail() {
+		if ( $this->firejail === null ) {
+			$this->firejail = ExecutableFinder::findInDefaultPaths( 'firejail' );
+		}
+
+		return $this->firejail;
+	}
+
+	/**
+	 * When enabled, text sent to stderr will be logged with a level of 'error'.
+	 *
+	 * @param bool $yesno
+	 * @see Command::logStderr
+	 */
+	public function logStderr( $yesno = true ) {
+		$this->doLogStderr = $yesno;
+	}
+
+	/**
+	 * Instantiates a new Command
+	 *
+	 * @return Command
+	 */
+	public function create() {
+		if ( $this->restrictionMethod === 'firejail' ) {
+			$command = new FirejailCommand( $this->findFirejail() );
+			$command->restrict( Shell::RESTRICT_DEFAULT );
+		} else {
+			$command = new Command();
+		}
+		$command->setLogger( $this->logger );
+
+		return $command
+			->limits( $this->limits )
+			->cgroup( $this->cgroup )
+			->logStderr( $this->doLogStderr );
+	}
+}