drupal_composer_builder/src/BaseBuilderCommand.php

<?php
declare(strict_types = 1);

namespace Fgm\Drupal\Composer;

use Composer\Command\BaseCommand;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;

abstract class BaseBuilderCommand extends BaseCommand
{

    /**
     * The name of the argument defining the file to generate.
     */
    const ARG_FILE = 'file';

    protected function getBuilderConfig(): array
    {
        $conf = $this->getComposer()->getPackage()->getExtra()[Builder::NAME] ?? [];
        return $conf;
    }

    protected function getSettingsPath(): string
    {
        $settingsPath = getcwd() . "/settings";
        return $settingsPath;
    }

  /**
   * @param \Symfony\Component\Console\Input\InputInterface $input
   * @param \Symfony\Component\Console\Output\OutputInterface $output
   *
   * @return array
   *   - string Template name
   *   - int Error
   */
  public function validateTemplateName(InputInterface $input, OutputInterface $output): array {
    $file = $input->getArgument(static::ARG_FILE);
    $conf = $this->getBuilderConfig();
    $templateName = $conf['templates'][$file] ?? '';
    if (empty($templateName)) {
        $output->writeln(sprintf(
            'Could not build file %s: no such template in composer.json extra section',
          $file
        ));
      return ["", 1];
    }
    return [$templateName, 0];
  }
}