ext_localconf.php

<?php
defined('TYPO3_MODE') or die();

call_user_func(
    function ($_EXTKEY) {
        \TYPO3\CMS\Extbase\Utility\ExtensionUtility::configurePlugin(
            'Pixelant.' . $_EXTKEY,
            'Showfeed',
            [
                'Feeds' => 'list, loadFeedAjax, listAjax'
            ],
            // non-cacheable actions
            [
                'Feeds' => 'list, loadFeedAjax'
            ]
        );

        $ll = 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang_db.xlf:';

        // @codingStandardsIgnoreStart
        # Import task
        $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks'][\Pixelant\PxaSocialFeed\Task\ImportTask::class] = [
            'extension' => $_EXTKEY,
            'title' => $ll . 'tx_pxasocialfeed.task.import.name',
            'description' => $ll . 'tx_pxasocialfeed.task.import.description',
            'additionalFields' => \Pixelant\PxaSocialFeed\Task\ImportTaskAdditionalFieldProvider::class
        ];

        # Clean up task
        $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['scheduler']['tasks'][\Pixelant\PxaSocialFeed\Task\CleanUpTask::class] = [
            'extension' => $_EXTKEY,
            'title' => $ll . 'tx_pxasocialfeed.task.cleanuptask.name',
            'description' => $ll . 'tx_pxasocialfeed.task.cleanuptask.description',
            'additionalFields' => \Pixelant\PxaSocialFeed\Task\CleanUpTaskAdditionalFieldProvider::class
        ];

        // hook for extension BE view
        $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['cms/layout/class.tx_cms_layout.php']['list_type_Info']['pxasocialfeed_showfeed'][$_EXTKEY] =
            \Pixelant\PxaSocialFeed\Hooks\PageLayoutView::class . '->getExtensionInformation';
        // @codingStandardsIgnoreEnd

        \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addPageTSConfig(
            '<INCLUDE_TYPOSCRIPT: source="FILE:EXT:pxa_social_feed/Configuration/TSconfig/ContentElementWizard.ts">'
        );

        # register icons
        if (TYPO3_MODE === 'BE') {
            $icons = [
                'ext-pxasocialfeed-wizard-icon' => 'feed.svg',
                'ext-pxasocialfeed-model-icon' => 'feed.svg',
                'ext-pxasocialfeed-model-icon-facebook' => 'facebook.svg',
                'ext-pxasocialfeed-model-icon-instagram' => 'instagram.svg',
                'ext-pxasocialfeed-model-icon-twitter' => 'twitter.svg'
            ];
            /** @var \TYPO3\CMS\Core\Imaging\IconRegistry $iconRegistry */
            $iconRegistry = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(
                \TYPO3\CMS\Core\Imaging\IconRegistry::class
            );

            foreach ($icons as $identifier => $path) {
                $iconRegistry->registerIcon(
                    $identifier,
                    \TYPO3\CMS\Core\Imaging\IconProvider\SvgIconProvider::class,
                    ['source' => 'EXT:pxa_social_feed/Resources/Public/Icons/BE/' . $path]
                );
            }
        }
    },
    'pxa_social_feed'
);