class SettingsForm

final class SettingsForm extends ConfigFormBase {
  
  /**
   * {@inheritdoc}
   */
  public function getFormId() : string {
    return 'package_manager_settings_form';
  }
  
  /**
   * {@inheritdoc}
   */
  protected function getEditableConfigNames() : array {
    return [
      'package_manager.settings',
    ];
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) : array {
    $form['executables'] = [
      '#type' => 'details',
      '#title' => $this->t('Executable paths'),
      '#open' => TRUE,
      '#description' => $this->t('Configure the paths to required executables.'),
    ];
    $trim = fn(string $value): string => trim($value);
    $form['executables']['composer'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Composer executable path'),
      '#config_target' => new ConfigTarget('package_manager.settings', 'executables.composer', toConfig: $trim),
      '#description' => $this->t('The full path to the <code>composer</code> executable (e.g., <code>/usr/local/bin/composer</code>).'),
      '#required' => TRUE,
    ];
    $form['executables']['rsync'] = [
      '#type' => 'textfield',
      '#title' => $this->t('rsync executable path'),
      '#config_target' => new ConfigTarget('package_manager.settings', 'executables.rsync', toConfig: $trim),
      '#description' => $this->t('The full path to the <code>rsync</code> executable (e.g., <code>/usr/bin/rsync</code>).'),
      '#required' => TRUE,
    ];
    return parent::buildForm($form, $form_state);
  }

}