Provide public path to js entry files (#2770)

client/main.js

@@ -21,10 +21,6 @@ import { setNonce, setBaseURL } from 'api/request';
 import wpcomApiMiddleware from 'state/data-layer/wpcom-api-middleware';
 import localApiMiddleware from 'lib/local-api-middleware';
 
-// Modify webpack pubilcPath at runtime based on location of WordPress Plugin.
-// eslint-disable-next-line no-undef
-__webpack_public_path__ = global.wcsPluginData.assetPath;
-
 // We need to lazy load the moment locale files.
 // First we try language code with region if it's different then fall back to language code only.
 if ( window.i18nLocale && ! [ 'en-US', 'en' ].includes( window.i18nLocale.localeSlug ) ) {

client/provide-public-path.js

@@ -0,0 +1,3 @@
+// Modify webpack pubilcPath at runtime based on location of WordPress Plugin.
+// eslint-disable-next-line no-undef
+__webpack_public_path__ = global.wcsPluginData.assetPath;

webpack.config.js

@@ -51,11 +51,17 @@ module.exports = {
 	devtool: isDev ? 'inline-source-map' : false,
 	cache: true,
 	entry: {
-		'woocommerce-services': [ './client/main.js' ],
+		'woocommerce-services': [
+			'./client/provide-public-path.js',
+			'./client/main.js'
+		],
 		'woocommerce-services-banner': [ './client/banner.js' ],
 		'woocommerce-services-admin-pointers': [ './client/admin-pointers.js' ],
 		'woocommerce-services-new-order-taxjar': [ './client/new-order-taxjar.js' ],
-		'woocommerce-services-wcshipping-migration-admin-notice': [ './client/wcshipping-migration-admin-notice.js' ],
+		'woocommerce-services-wcshipping-migration-admin-notice': [
+			'./client/provide-public-path.js',
+			'./client/wcshipping-migration-admin-notice.js'
+		],
 	},
 	output: Object.assign(
 			{},

woocommerce-services.php

@@ -1966,6 +1966,14 @@ public function register_wcshipping_migration_modal() {
 			$plugin_version = self::get_wcs_version();
 			wp_register_style( 'wcst_wcshipping_migration_admin_notice', $this->wc_connect_base_url . 'woocommerce-services-wcshipping-migration-admin-notice-' . $plugin_version . '.css', array(), null ); // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion
 			wp_register_script( 'wcst_wcshipping_migration_admin_notice', $this->wc_connect_base_url . 'woocommerce-services-wcshipping-migration-admin-notice-' . $plugin_version . '.js', array(), null );
+			wp_localize_script(
+				'wcst_wcshipping_migration_admin_notice',
+				'wcsPluginData',
+				array(
+					'assetPath'       => self::get_wc_connect_base_url(),
+					'adminPluginPath' => admin_url( 'plugins.php' ),
+				)
+			);
 			wp_enqueue_script( 'wcst_wcshipping_migration_admin_notice' );
 			wp_enqueue_style( 'wcst_wcshipping_migration_admin_notice' );
 			wp_enqueue_script( 'wc_connect_admin' );