Elgg\CommitMessageGitHookTest::runCmd PHP Method

    protected function runCmd($cmd, &$output, array $env = array())
    {
        $descriptorspec = array(0 => array("pipe", "r"), 1 => array("pipe", "w"), 2 => array("pipe", "w"));
        $defaultEnv = array('PATH' => getenv('PATH'));
        $env = array_merge($defaultEnv, $env);
        $process = proc_open($cmd, $descriptorspec, $pipes, null, $env);
        $this->assertTrue(is_resource($process));
        // unfortunately we separate errors from output, but it should be good enough for current usage
        $output = stream_get_contents($pipes[1]) . stream_get_contents($pipes[2]);
        $exit = proc_close($process);
        return $exit > 0 ? false : true;
    }