Merge pull request #225 from Codeinwp/fix/theme_rollback_wp63

fix: rollback for themes WP6.3

src/Modules/Rollback.php

@@ -284,6 +284,21 @@ private function start_rollback_theme() {
 			$nonce = 'upgrade-theme_' . $theme;
 			$url   = 'update.php?action=upgrade-theme&theme=' . urlencode( $theme );
 
+			/**
+			 * The rollback will attach a temporary theme for the rollback to the transient.
+			 * However, when executing the upgrade for the attached theme we need to change the slug to the original theme slug.
+			 * This is because it will use the slug to create a temp folder for the theme used during the upgrade.
+			 */
+			add_filter(
+				'upgrader_package_options',
+				function( $options ) use ( $folder, $theme ) {
+					if ( isset( $options['hook_extra']['theme'] ) && $options['hook_extra']['theme'] === $theme && isset( $options['hook_extra']['temp_backup']['slug'] ) ) {
+						$options['hook_extra']['temp_backup']['slug'] = $folder;
+					}
+					return $options;
+				}
+			);
+
 			$upgrader = new \Theme_Upgrader( new \Theme_Upgrader_Skin( compact( 'title', 'nonce', 'url', 'theme' ) ) );
 			$upgrader->upgrade( $theme );
 			delete_transient( $this->product->get_key() . '_warning_rollback' );