symfony doctrine migrations with multiple entity managers

I’m trying to make SaaS application and for this purpose created multiple entity managers and corresponding connections by following official documentation but running php bin/console doctrine:migrations:diff --em=customer command results in exception The "--em" option does not exist.. I know that i can change doctrine_migrations.yaml parameter called em but that`s not a solution considering that number of entity managers can grow. Is there any workaround to go with?

doctrine.yml:

doctrine:
    dbal:
        default_connection: default
        connections:
            default:
                url: '%env(resolve:DATABASE_URL)%'
                driver: 'pdo_mysql'
                server_version: '5.7'
                charset: utf8mb4
            tenant:
                url: '%env(resolve:TENANT_DATABASE_URL)%'
                driver: 'pdo_mysql'
                server_version: '5.7'
                charset: utf8mb4
                wrapper_class: AppServiceConfigDatabaseConnection

    orm:
        auto_generate_proxy_classes: true

        default_entity_manager: default
        entity_managers:
            default:
                auto_mapping: false
                naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
                mappings:
                    Shared:
                        mapping: true
                        is_bundle: false
                        type: annotation
                        dir: '%kernel.project_dir%/src/Entity/Shared'
                        prefix: 'AppEntityShared'
                        alias: Shared

            tenant:
                connection: tenant
                auto_mapping: false
                naming_strategy: doctrine.orm.naming_strategy.underscore_number_aware
                mappings:
                    Tenant:
                        mapping: true
                        is_bundle: false
                        type: annotation
                        dir: '%kernel.project_dir%/src/Entity/Tenant'
                        prefix: 'AppEntityTenant'
                        alias: Tenant

AppServiceConfigDatabaseConnection class is just a wrapper that can change connection’s parameters on fly.

Answer

So far answer is: docs are outdated, doctrine/doctrine-migrations-bundle v3.1 will probably solve it, but it relies on doctrine/migrations library to release v3.1 (as mentioned in issue), and so far only solution is this workaround with command wrappers but it requires tweaks with configuration (YamlFile in article expects doctrine style config and not symfony’s)

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Answer