feat: allow for adding extra databases

Allow for declaring extra databases that should be created when the
project is first started. This is done by adding an `extra_databases`
key to `database`, containing a list of database names.

```yaml
database:
  type: mariadb
  version: 10
  extra_databases:
    - tinhat
    - freshcover
```

bin/build-configs

@@ -78,6 +78,13 @@ $app->command(
             ['env.example', '.env.example'],
         ]);
 
+        $extraDatabases = Arr::get($configurationData, 'database.extra_databases', []);
+        if (count($extraDatabases) > 0) {
+            $filesystem = new Filesystem();
+            $filesystem->mkdir("{$outputDir}/tools/docker/images/database/root/docker-entrypoint-initdb.d");
+            $filesToGenerate->push(['extra-databases.sql', 'tools/docker/images/database/root/docker-entrypoint-initdb.d/extra-databases.sql']);
+        }
+
         if (false !== Arr::get($configurationData, "justfile", true)) {
             $filesToGenerate->push(['justfile', 'justfile']);
         }

src/Validator/ConfigurationValidator.php

@@ -50,7 +50,22 @@ final class ConfigurationValidator implements ValidatorInterface
                         new Assert\Type('string'),
                     ],
 
-                    'database' => new Assert\Optional(),
+                    'database' => new Assert\Collection(
+                        [
+                            'extra_databases' => new Assert\Optional(
+                                [
+                                    new Assert\Type(['type' => 'array']),
+                                    new Assert\All(
+                                        [
+                                            new Assert\Type(['type' => 'string'])
+                                        ]
+                                    )
+                                ],
+                            ),
+                            'type' => new Assert\Type(['type' => 'string']),
+                            'version' => new Assert\Type(['type' => 'integer']),
+                        ]
+                    ),
 
                     'drupal' => new Assert\Optional(),
 

templates/docker-compose.yaml.twig

@@ -82,6 +82,7 @@ services:
           memory: "${DOCKER_MYSQL_MEMORY:-0}"
     volumes:
       - db-data:/var/lib/mysql
+      {{ database.extra_databases is not empty ? '- ./tools/docker/images/database/root/docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d' : '' }}
     env_file:
       - .env
     labels:

templates/extra-databases.sql.twig

@@ -0,0 +1,5 @@
+{% for database in database.extra_databases %}
+CREATE DATABASE {{ database }};
+GRANT ALL PRIVILEGES ON {{ database }}.* TO drupal@'%' IDENTIFIED BY 'drupal';
+
+{% endfor %}