Feature: #82809 - Make ExtensionUtility::registerPlugin method return plugin signature.

Description

The API method TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin() is used to register an Extbase plugin. The method is called in the Configuration/TCA/Overrides/tt_content.php file of an extension and often followed by the definition of a FlexForm.

Such methods require the plugin signature to be provided. To support extension authors and to reduce coding errors, the registerPlugin() method therefore now returns the generated plugin signature as string.

Example

$pluginSignature = ExtensionUtility::registerPlugin(
    'indexed_search',
    'Pi2',
    'Testing'
);

The above call returns the plugin signature: indexedsearch_pi2. This could then be used for, e.g., adding a FlexForm:

ExtensionManagementUtility::addPiFlexFormValue(
    $pluginSignature,
    'FILE:EXT:indexed_search/Configuration/FlexForms/Form.xml'
);

Impact

The API method TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerPlugin() now returns the plugin signature, which might be used to adjust TCA to further needs, e.g. enabling FlexForms.