hookconvert.php

<?php

use Drupal\Component\Serialization\Yaml;
use PhpParser\Node\Stmt\Function_;
use PhpParser\Node\Stmt\Use_;
use PhpParser\NodeFinder;
use PhpParser\ParserFactory;
use Symfony\Component\DependencyInjection\Container;

require_once 'autoload.php';

$it = new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator('core'));
foreach ($it as $fileinfo) {
  assert($fileinfo instanceof \SplFileInfo);
  $filename = $fileinfo->getFilename();
  $full_path = $fileinfo->getPathname();
  if (str_ends_with($filename, '.info.yml')) {
    $info = Yaml::decode(file_get_contents($full_path));
    if ($info['type'] === 'module') {
      $dir = dirname($full_path);
      $module_dirs[$dir] = [
        'name'  => basename($filename, '.info.yml'),
        'length' => strlen($dir),
      ];
    }
  }
  if (str_ends_with($filename, '.module') || str_ends_with($filename, '.inc')) {
    $files[] = $full_path;
  }
}
// Longer ones first.
uasort($module_dirs, fn ($a, $b) => $b['length'] - $a['length']);
$preg = '#^(' . implode('|', array_keys($module_dirs)) . ')#';
$parser = (new ParserFactory())->createForHostVersion();
$finder = new NodeFinder();
$files = ['core/modules/user/user.module'];
foreach ($files as $file) {
  // The includes/ dir and test fixture.
  if (!preg_match($preg, $file, $matches)) {
    continue;
  }
  $module = $module_dirs[$matches[1]]['name'];
  @mkdir($matches[1] . '/src');
  $outdir = $matches[1] . '/src/Hook/';
  @mkdir($outdir);
  $class = Container::camelize($module) . 'Hooks';
  $outfile = "$outdir/$class.php";
  $outlines = [
    '<?php',
    '',
    "namespace Drupal\\$module\\Hook;",
    '',
    'use Drupal\\Core\\Extension\\Hook;'
  ];
  $code = file_get_contents($file);
  $lines = explode("\n", $code);
  $stmts = $parser->parse($code);
  if ($uses = $finder->findInstanceOf($stmts, Use_::class)) {
    foreach ($uses as $use) {
      for ($i = $use->getStartLine(); $i <= $use->getEndLine(); $i++) {
        $outlines[] = $lines[$i - 1];
      }
    }
  }
  $outlines[] = "class $class {";
  $functions = $finder->findInstanceOf($stmts, Function_::class);
  foreach ($functions as $function) {
    assert($function instanceof Function_);
    if (!preg_match('/^ \* Implements hook_/m', $function->getDocComment())) {
      continue;
    }
    $function_name = $function->name;
    if (!str_starts_with($function_name, $module . '_')) {
      continue;
    }
    $hook = substr($function_name, strlen($module) + 1);
    for ($i = $function->getDocComment()->getStartLine(); $i <= $function->getDocComment()->getEndLine(); $i++) {
      unset($lines[$i - 1]);
    }
    $outlines[] = "  #[Hook(hook: '$hook')]";
    for ($i = $function->getStartLine(); $i <= $function->getEndLine(); $i++) {
      $outlines[] = '  ' . preg_replace("/^function $function_name/", 'public function ' . lcfirst(Container::camelize($hook)), $lines[$i - 1]);
      unset($lines[$i - 1]);
    }
  }
  $outlines[] = '}';
  file_put_contents($file, implode("\n", $lines));
  file_put_contents($outfile, implode("\n", $outlines));
}
// You need to run composer phpcbf on the converted file.