Monolog console handler and console channel

[ypereirareis]

Console handler

• allows to control output VERBOSITY and LOGS LEVELS matching.
• allows to output logs and messages in CLI command STDOUT / STDERR.
• logs messages with "console" channel.
• is not taking deduplication configuration into account
• is logging data even if other handlers already dealt with it.
• ./bin/console : Always print errors at the end of the command in readable format (doRenderException() in vendor/symfony/symfony/src/Symfony/Component/Console/Application.php)

Recomandatation

• Keep console handler but silent "console" channel on itself to avoid logging on console output.

monolog:
    handlers:
        # ...
        console:
            type:   console
            process_psr_3_messages: false
            channels: [..., '!console']

This allows :

• to have clear console output in dev env.
• to not flood console output in production env en case of errors.
• to avoid duplicated errors (main handler and console handler)
• to keep the possibility to change VERBOSITY <=> LOG LEVEL matching.