Admin bar: Update the Edit Site link

backport-changelog/6.8/8372.md

@@ -0,0 +1,3 @@
+https://github.com/WordPress/wordpress-develop/pull/8372
+
+* https://github.com/WordPress/gutenberg/pull/69271

lib/compat/wordpress-6.8/admin-bar.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * Updates the Edit Site link in the admin bar to point to the top level of the Site Editor.
+ * Removes the use of the $_wp_current_template_id global and the query args.
+ * Displays the link while in the admin area.
+ * Changes the capitalization of the link text to match WP 6.8: https://core.trac.wordpress.org/ticket/62971
+ *
+ * Note: Backports into wp-includes\admin-bar.php wp_admin_bar_edit_site_menu()
+ *
+ * @param WP_Admin_Bar $wp_admin_bar The WP_Admin_Bar instance.
+ */
+function gutenberg_wp_admin_bar_edit_site_menu( $wp_admin_bar ) {
+	// Don't show if a block theme is not activated.
+	if ( ! wp_is_block_theme() ) {
+		return;
+	}
+
+	// Don't show for users who can't edit theme options.
+	if ( ! current_user_can( 'edit_theme_options' ) ) {
+		return;
+	}
+
+	$wp_admin_bar->add_node(
+		array(
+			'id'    => 'site-editor',
+			'title' => __( 'Edit Site' ),
+			'href'  => admin_url( 'site-editor.php' ),
+		)
+	);
+}
+
+add_action( 'admin_bar_menu', 'gutenberg_wp_admin_bar_edit_site_menu', 41 );

lib/load.php

@@ -98,6 +98,7 @@ function gutenberg_is_experiment_enabled( $name ) {
 require __DIR__ . '/compat/wordpress-6.7/post-formats.php';
 
 // WordPress 6.8 compat.
+require __DIR__ . '/compat/wordpress-6.8/admin-bar.php';
 require __DIR__ . '/compat/wordpress-6.8/preload.php';
 require __DIR__ . '/compat/wordpress-6.8/blocks.php';
 require __DIR__ . '/compat/wordpress-6.8/functions.php';