Watch script for Swoole HTTP server restarts.

watch.php

<?php declare(strict_types=1);

require_once __DIR__.'/vendor/autoload.php';

use Symfony\Component\Process\Process;

$process = new Process(['php', 'index.php']);

echo "Starting process\n";
$process->start();

$files = php_files();
$watch = array_combine($files, array_map('file_hash', $files));
$count = count($watch);

echo "Watching $count files...\n";
while (true) {
    sleep(2);

    foreach ($watch as $pathname => $currrent_hash) {
        $new_hash = file_hash($pathname);

        if ($new_hash != $currrent_hash) {
            echo "Change detected. Restarting process.\n";

            $process->stop();

            $watch[$pathname] = $new_hash;

            echo "::: 🚀 :::\n";
            $process->start();

            continue;
        }
    }
}

function php_files(): array
{
    $directory = new RecursiveDirectoryIterator(__DIR__);
    $filter = new Filter($directory);
    $iterator = new RecursiveIteratorIterator($filter);

    return array_map(function ($fileInfo) {
        return $fileInfo->getPathname();
    }, iterator_to_array($iterator));
}

function file_hash(string $pathname): string
{
    return md5(file_get_contents($pathname));
}

class Filter extends RecursiveFilterIterator
{
    public function accept()
    {
        if ($this->current()->isDir()) {
            return !in_array($this->current()->getFilename(), ['.git', 'vendor', '.', '..', '.phan']);
        }

        return preg_match('/\.php$/', $this->current()->getFilename());
    }
}