ComposerHookHandler.php

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<?php
 
use Composer\Package\Package;
use Composer\Plugin\PluginInterface;
use Composer\Script\Event;
 
$GLOBALS['IP'] = __DIR__ . '/../../';
require_once __DIR__ . '/../AutoLoader.php';
 
class ComposerHookHandler {
 
    public static function onPreUpdate( Event $event ) {
        self::checkMergePluginActive( $event );
        self::handleChangeEvent( $event );
    }
 
    private static function checkMergePluginActive( Event $event ) {
        if ( version_compare( PluginInterface::PLUGIN_API_VERSION, '2.0.0', '>=' ) ) {
            foreach ( $event->getComposer()->getPluginManager()->getPlugins() as $plugin ) {
                if ( $plugin instanceof \Wikimedia\Composer\Merge\V2\MergePlugin ) {
                    // If v2 of wikimedia/composer-merge-plugin is already installed,
                    // nothing needs doing
                    return;
                }
 
                // Check if v1 of wikimedia/composer-merge-plugin is still installed
                if ( $plugin instanceof \Wikimedia\Composer\MergePlugin ) {
                    throw new \Exception( "wikimedia/composer-merge-plugin 2.x is not activated. " .
                        "Use Composer 1.x to update wikimedia/composer-merge-plugin to version " .
                        "2.x before running Composer 2.x." );
                }
            }
        }
    }
 
    public static function onPreInstall( Event $event ) {
        self::handleChangeEvent( $event );
    }
 
    private static function handleChangeEvent( Event $event ) {
        $package = $event->getComposer()->getPackage();
 
        if ( $package instanceof Package ) {
            $packageModifier = new ComposerPackageModifier(
                $package,
                new ComposerVersionNormalizer(),
                new MediaWikiVersionFetcher()
            );
 
            $packageModifier->setProvidesMediaWiki();
        }
    }
}