owncloud / updater

		return $this->extractArchive();

	}

	private function extractShell(){

		$command = 'tar -jxvf  ' . ProcessUtils::escapeArgument($this->file) . ' -C ' . ProcessUtils::escapeArgument($this->path) . ' && chmod -R u+w ' . ProcessUtils::escapeArgument($this->path);

		$process = new Process($command);

		$process->run();

		echo $process->getErrorOutput();

		return $process->isSuccessful();

	}

	private function extractArchive(){

		throw new \RuntimeException("Could not decompress the archive, GNU tar is missing or shell_exec is disabled.");

		return $this->extractZipArchive();

	}

	private function extractShell(){

		$command = 'unzip ' . ProcessUtils::escapeArgument($this->file) . ' -d ' . ProcessUtils::escapeArgument($this->path) . ' && chmod -R u+w ' . ProcessUtils::escapeArgument($this->path);

		$process = new Process($command);

		$process->run();

		echo $process->getErrorOutput();

		return $process->isSuccessful();

	}

	private function extractZipArchive(){

		$zipArchive = new ZipArchive();