Breaking: #108304 - Populate extension title from composer.json 

Description 

To avoid reading the legacy ext_emconf.php file even in Composer mode, the extension title is now optionally pulled from the composer.json description. If the character sequence - (space, dash, space) is present in description field in composer.json, then everything before this sequence is used as title of the extension and the second part is used as extension description. Note that only the first occurrence of this sequence is evaluated, so it remains possible to have this inside the extension description if required.

Impact 

Extensions not having their title incorporated in the composer.json description field, will be shown with the full description in extension manager and from command line with typo3 extension:list command.

Affected installations 

Installations having custom extensions, where the title is not part of the description in composer.json

Migration 

Put the desired extension title into the composer.json description field and separate it from the description with - (space, dash, space), or use the extension manager "Composer Support of Extensions" to get a suggestion for updating composer.json files accordingly.

All TYPO3 core extensions have set their description in composer.json accordingly already.

Example of description with title in composer.json:

<?php

$EM_CONF[$_EXTKEY] = [
    'title' => 'TYPO3 CMS Backend User',
    'description' => 'TYPO3 backend module System>Backend Users for managing backend users and groups.',
    // ...
];

{
    "name": "typo3/cms-beuser",
    "type": "typo3-cms-framework",
    "description": "TYPO3 CMS Backend User - TYPO3 backend module System>Backend Users for managing backend users and groups.",
}