monolog:
    channels:
        - deprecation

when@dev:
    monolog:
        handlers:
            main:
                type: stream
                path: '%kernel.logs_dir%/%kernel.environment%.log'
                level: debug
                channels: ['!event']

when@prod:
    monolog:
        handlers:
            main:
                type: stream
                path: php://stderr
                level: warning
                channels: ['!event']
            deprecation:
                type: stream
                channels: [deprecation]
                path: '%kernel.logs_dir%/%kernel.environment%.deprecations.log'
                level: info