Symfony - error reporting via email on critical errors or exceptions.

config_prod.yml

monolog:
    handlers:
        main:
            type: fingers_crossed
            action_level: error
            handler: grouped
        grouped:
            type:    group
            members: [rotating, console, deduplicated]
        rotating:
            type: rotating_file
            level: debug
            max_files: 30
        console:
            type: console
            level: debug
#            process_psr_3_messages: false
        deduplicated:
            type:    deduplication
            handler: swift
        swift:
              type:       swift_mailer
              from_email: 'noreply@example.com'
              to_email:   ['john@example.com']
              subject:    'Example.com: An Error Occurred! %%message%%'
              level:      critical
              formatter:  monolog.formatter.html
              content_type: text/html

ConsoleExceptionListener.php

<?php

namespace AppBundle\EventListener;

use Symfony\Component\Console\Event\ConsoleErrorEvent;
use Psr\Log\LoggerInterface;

class ConsoleExceptionListener
{
    private $logger;

    public function __construct(LoggerInterface $logger)
    {
        $this->logger = $logger;
    }

    public function onConsoleError(ConsoleErrorEvent $event)
    {
        $command = $event->getCommand();
        $error = $event->getError();

        $message = sprintf(
            '%s: %s (uncaught error) at %s line %s while running console command `%s`',
            get_class($error),
            $error->getMessage(),
            $error->getFile(),
            $error->getLine(),
            $command->getName()
        );

        $this->logger->critical($message, array('error' => $error));
    }
}

services.yml

services:
    AppBundle\EventListener\ConsoleExceptionListener:
        tags:
            - { name: kernel.event_listener, event: console.error }