pho\Runner\Runner::watch PHP Method

    public function watch()
    {
        $watcher = new Watcher();
        $watcher->watchPath(getcwd());
        $watcher->addListener(function () {
            $paths = implode(' ', self::$console->getPaths());
            $descriptor = [0 => ['pipe', 'r'], 1 => ['pipe', 'w']];
            // Rebuild option string, without watch
            $optionString = '';
            foreach (self::$console->options as $key => $val) {
                if ($key == 'watch') {
                    continue;
                } elseif ($val === true) {
                    // test
                    $optionString .= "--{$key} ";
                } elseif ($val) {
                    $optionString .= "--{$key} {$val} ";
                }
            }
            // Run pho in another process and echo its stdout
            $procStr = "{$_SERVER['SCRIPT_FILENAME']} {$optionString} {$paths}";
            $process = proc_open($procStr, $descriptor, $pipes);
            if (is_resource($process)) {
                while ($buffer = fread($pipes[1], 16)) {
                    self::$console->write($buffer);
                }
                fclose($pipes[0]);
                fclose($pipes[1]);
                proc_close($process);
            }
        });
        // Ever vigilant
        $watcher->watch();
    }