I've been trying to write a custom installer for my Composer package but can't get it to work. What I need now is:

• I want my package to be installed in the root directory. My package name is rootdata21/hati, so I moved the hati folder to the root of the project.
• Now I updated it by adding an entry to the autoload psr4 attribute of the composer.json file as follows: { "autoload": { "psr-4": { "hati" : "hati/" } } }

But I don't actually know how to get composer to regenerate the autoloader to reflect the ones in the composer.json file This new autoload entry. Below is my Installer class.

 composer = $composer; $this -> root = $root . DIRECTORY_SEPARATOR; $this -> hatiDir = $root . DIRECTORY_SEPARATOR . 'hati' . DIRECTORY_SEPARATOR; parent::__construct($io, $composer); } public function getInstallPath(PackageInterface $package): string { return 'rootdata21'; } public function install(InstalledRepositoryInterface $repo, PackageInterface $package): ?PromiseInterface { if (file_exists($this -> hatiDir)) { $choice = $this -> io -> ask('Existing hati folder found. Do you want to delete it? [y/n]: ', 'n'); if ($choice === 'y') { self::rmdir($this -> hatiDir); } else { $this -> io -> critical('Hati installation has been cancelled. Please delete hati folder manually.'); return null; } } return parent::install($repo, $package)->then(function () { // Move hati folder to project root directory $old = $this -> root . 'rootdata21'. DIRECTORY_SEPARATOR .'hati'; rename($old, $this -> hatiDir); // delete the rootdata21 folder self::rmdir($this -> root . 'rootdata21'); // generate/update the hati.json file on the project root directory $createNewConfig = true; if (file_exists($this -> root . 'hati.json')) { while(true) { $ans = $this -> io -> ask('Existing hati.json found. Do you want to merge it with new config? [y/n]: '); if ($ans !== 'y' && $ans !== 'n') continue; break; } $createNewConfig = $ans == 'n'; } require_once "{$this -> hatiDir}config" . DIRECTORY_SEPARATOR . "ConfigWriter.php"; $result = ConfigWriter::write($this->root, $createNewConfig); // show the result to the user if ($result['success']) { $this -> io -> info($result['msg']); $welcomeFile = $this -> hatiDir . 'page/welcome.txt'; if (file_exists($welcomeFile)) include($welcomeFile); } else { $this -> io -> error($result['msg']); } $this -> dumpAutoload(); }); } public function update(InstalledRepositoryInterface $repo, PackageInterface $initial, PackageInterface $target) { return parent::update($repo, $initial, $target) -> then(function () { require_once "{$this -> hatiDir}config" . DIRECTORY_SEPARATOR . "ConfigWriter.php"; $result = ConfigWriter::write($this->root); // show the result to the user if ($result['success']) { $this -> io -> info('Hati has been updated successfully'); } else { $this -> io -> error($result['msg']); } }); } public function supports($packageType): bool { return 'hati-installer' === $packageType; } private function dumpAutoload(): void { $composerJsonPath = $this -> root . 'composer.json'; $composerJson = json_decode(file_get_contents($composerJsonPath), true); $composerJson['autoload']['psr-4']['hati\'] = 'hati/'; file_put_contents($composerJsonPath, json_encode($composerJson, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES)); // Regenerate the Composer autoload files to include your classes $this -> composer -> getEventDispatcher() -> dispatchScript(ScriptEvents::POST_AUTOLOAD_DUMP); } public static function rmdir($dir): bool { if (!file_exists($dir)) return true; if (!is_dir($dir)) return unlink($dir); foreach (scandir($dir) as $item) { if ($item == '.' || $item == '..') continue; if (!self::rmdir($dir . DIRECTORY_SEPARATOR . $item)) return false; } return rmdir($dir); } }