TYPO3 Core

I looked how Symfony does it.
It extends Console/Application and overrides this method:

    /**
     * {@inheritdoc}
     */
    public function getLongVersion()
    {
        return parent::getLongVersion().sprintf(' (env: <comment>%s</>, debug: <comment>%s</>)', $this->kernel->getEnvironment(), $this->kernel->isDebug() ? 'true' : 'false');
    }

see https://github.com/symfony/symfony/blob/4.2/src/Symfony/Bundle/FrameworkBundle/Console/Application.php#L141

Patch set 2 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/61382

Patch set 3 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/61382

Patch set 4 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/61382

Patch set 5 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/61382

Patch set 6 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/61382

Patch set 7 for branch master of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/61382