Work on centralized script module registration

src/wp-includes/assets/script-modules-packages.min.php

@@ -0,0 +1 @@
+<?php return array('interactivity/index.min.js' => array('dependencies' => array(), 'version' => '3e74d9d0860b282f2c76', 'type' => 'module'), 'interactivity/debug.min.js' => array('dependencies' => array(), 'version' => '75090a5bf4a74c69c96c', 'type' => 'module'), 'interactivity-router/index.min.js' => array('dependencies' => array('@wordpress/interactivity'), 'version' => '64645ef3cd2d32860d7d', 'type' => 'module'), 'a11y/index.min.js' => array('dependencies' => array(), 'version' => 'b7d06936b8bc23cff2ad', 'type' => 'module'));

src/wp-includes/script-modules.php

@@ -142,12 +142,39 @@ function wp_default_script_modules() {
 	$assets = include ABSPATH . WPINC . "/assets/script-modules-packages{$suffix}.php";
 
 	foreach ( $assets as $file_name => $script_module_data ) {
-		if ( basename( $file_name ) !== "index{$suffix}.js" ) {
-			continue;
+		$package_name     = dirname( $file_name );
+		$package_sub_name = basename( $file_name, "{$suffix}.js" );
+
+		switch ( $package_name ) {
+			/*
+			 * Interactivity exposes two entrypoints, `/index` and `/debug`.
+			 * They're the production and development versions of the package.
+			 */
+			case 'interactivity':
+				if ( SCRIPT_DEBUG ) {
+					if ( 'index' === $package_sub_name ) {
+						continue 2;
+					}
+				} else {
+					if ( 'debug' === $package_sub_name ) {
+						continue 2;
+					}
+				}
+				$script_module_id = '@wordpress/interactivity';
+				break;
+
+			/*
+			 * @wordpress/block-library block view script modules
+			 */
+			case 'interactivity':
+
+			default:
+				$script_module_id = 'index' === $package_sub_name ?
+					"@wordpress/{$package_name}" :
+					"@wordpress/{$package_name}/{$package_sub_name}";
 		}
-		$script_module_id = '@wordpress/' . dirname( $file_name );
-		$path             = "/wp-includes/js/dist/script-modules/{$file_name}";
 
+		$path = "/wp-includes/js/dist/script-modules/{$file_name}";
 		wp_register_script_module( $script_module_id, $path, $script_module_data['dependencies'], $script_module_data['version'] );
 	}
 }

tools/webpack/shared.js

@@ -103,6 +103,8 @@ const MODULES = [
 	'@wordpress/interactivity-router',
 ];
 const SCRIPT_AND_MODULE_DUAL_PACKAGES = [
+	'@wordpress/a11y',
+	'@wordpress/block-library',
 ];
 const WORDPRESS_NAMESPACE = '@wordpress/';