deployer/recipe/drupal7.php

<?php
  /* (c) Sergio Carracedo <info@sergiocarraedo.es>
   *
   * For the full copyright and license information, please view the LICENSE
   * file that was distributed with this source code.
   */

    use Symfony\Component\Yaml\Parser;

    require_once __DIR__ . '/common.php';

    task('deploy', [
    'deploy:prepare',
    'deploy:release',
    'deploy:update_code',
    'deploy:shared',
    'deploy:symlink',
    'cleanup'
    ]);

  //Set drupal site. Change if you use different site
  env('drupal_site', 'default');


  //Drupal 7 shared dirs
  set('shared_dirs', [
    'sites/{{drupal_site}}/files',
  ]);

  //Drupal 7 sharef files
  set('shared_files', [
    'sites/{{drupal_site}}/settings.php',
  ]);

  //Drupal 7 Writable dirs
  set('writable_dirs', [
    'sites/{{drupal_site}}/files',
  ]);


  //Create and upload Drupal 7 settings.php using values from secrets
  task('drupal:settings', function () {
    if (askConfirmation('Are you sure to generate and upload settings.php file?')) {
        $basepath = dirname(__FILE__). '/drupal7';
      
      //Import secrets
      $secrets = env('settings');
      
      //Prepare replacement variables
      $iterator = new RecursiveIteratorIterator(
        new RecursiveArrayIterator($secrets)
      );

        $replacements = [];
        foreach ($iterator as $key => $value) {
            $keys = [];
            for ($i = $iterator->getDepth(); $i > 0; $i --) {
                $keys[] = $iterator->getSubIterator($i - 1)->key();
            }
            $keys[] = $key;

            $replacements['{{' . implode('.', $keys) . '}}'] = $value;
        }

      //Create settings from template
      $settings = file_get_contents($basepath . '/settings.php');

        $settings = strtr($settings, $replacements);

        writeln('settings.php created succesfuly');

        $tmpFilename = tempnam($basepath, 'tmp_settings_');
        file_put_contents($tmpFilename, $settings);
      
        uploadEnv($tmpFilename, '{{deploy_path}}/shared/sites/{{drupal_site}}/settings.php');

        unlink($tmpFilename);
    }

  });

  //Upload Drupal 7 files folder
  task('drupal:upload_files', function () {
    if (askConfirmation('Are you sure?')) {
        uploadEnv('sites/{{drupal_site}}/files', '{{deploy_path}}/shared/sites/{{drupal_site}}/files');
    }
  });

  function uploadEnv($local, $remote)
  {
      $local = env()->parse($local);
      $remote = env()->parse($remote);
      upload($local, $remote);
  }