PhpBrew\Tasks\Apxs2CheckTask::check PHP Method

    public function check(Build $build)
    {
        $apxs = $build->getVariant('apxs2');
        // trying to find apxs binary in case it wasn't explicitly specified (+apxs variant without path)
        if ($apxs === true) {
            $apxs = Utils::findbin('apxs');
            $this->logger->debug("Found apxs2 binary: {$apxs}");
        }
        if (!is_executable($apxs)) {
            throw new Exception("apxs binary is not executable: {$apxs}");
        }
        // use apxs to check module dir permission
        if ($apxs && ($libdir = trim(Utils::pipeExecute("{$apxs} -q LIBEXECDIR")))) {
            if (false === is_writable($libdir)) {
                $this->logger->error("Apache module dir {$libdir} is not writable.\nPlease consider using chmod to change the folder permission:");
                $this->logger->error("    \$ sudo chmod -R oga+rw {$libdir}");
                $this->logger->error('Warnings: the command above is not safe for public systems. please use with discretion.');
                throw new Exception();
            }
        }
        if ($apxs && ($confdir = trim(Utils::pipeExecute("{$apxs} -q SYSCONFDIR")))) {
            if (false === is_writable($confdir)) {
                $this->logger->error("Apache conf dir {$confdir} is not writable for phpbrew.");
                $this->logger->error('Please consider using chmod to change the folder permission: ');
                $this->logger->error("    \$ sudo chmod -R oga+rw {$confdir}");
                $this->logger->error('Warnings: the command above is not safe for public systems. please use with discretion.');
                throw new Exception();
            }
        }
    }