phpbb_ynh/sources/phpBB/config/db.yml

services:
    dbal.conn:
        class: phpbb\db\driver\factory
        arguments:
            - @service_container

    dbal.conn.driver:
        class: %dbal.driver.class%
        calls:
            - [sql_connect, [%dbal.dbhost%, %dbal.dbuser%, %dbal.dbpasswd%, %dbal.dbname%, %dbal.dbport%, false, %dbal.new_link%]]

    dbal.tools:
        class: phpbb\db\tools
        arguments:
            - @dbal.conn

# ----- Migrator -----
    migrator:
        class: phpbb\db\migrator
        arguments:
            - @service_container
            - @config
            - @dbal.conn
            - @dbal.tools
            - %tables.migrations%
            - %core.root_path%
            - %core.php_ext%
            - %core.table_prefix%
            - @migrator.tool_collection
            - @migrator.helper

    migrator.helper:
        class: phpbb\db\migration\helper

# ----- Migrator's tools -----
    migrator.tool_collection:
        class: phpbb\di\service_collection
        arguments:
            - @service_container
        tags:
            - { name: service_collection, tag: migrator.tool }

    migrator.tool.config:
        class: phpbb\db\migration\tool\config
        arguments:
            - @config
        tags:
            - { name: migrator.tool }

    migrator.tool.config_text:
        class: phpbb\db\migration\tool\config_text
        arguments:
            - @config_text
        tags:
            - { name: migrator.tool }

    migrator.tool.module:
        class: phpbb\db\migration\tool\module
        arguments:
            - @dbal.conn
            - @cache
            - @user
            - %core.root_path%
            - %core.php_ext%
            - %tables.modules%
        tags:
            - { name: migrator.tool }

    migrator.tool.permission:
        class: phpbb\db\migration\tool\permission
        arguments:
            - @dbal.conn
            - @cache
            - @auth
            - %core.root_path%
            - %core.php_ext%
        tags:
            - { name: migrator.tool }