Clear translation file cache after uninstall

As of WP 6.5, the presence of .mo and .l10n.php files is cached.

Author: swissspidy

src/Core_Language_Command.php

@@ -374,6 +374,7 @@ public function uninstall( $args ) {
 			}
 
 			if ( $deleted ) {
+				$this->clear_translation_files_cache( WP_LANG_DIR . $dir );
 				WP_CLI::success( 'Language uninstalled.' );
 			} else {
 				WP_CLI::error( "Couldn't uninstall language." );

src/Plugin_Language_Command.php

@@ -551,6 +551,7 @@ public function uninstall( $args, $assoc_args ) {
 				if ( $count_files_to_remove === $count_files_removed ) {
 					$result['status'] = 'uninstalled';
 					++$successes;
+					$this->clear_translation_files_cache( $dir );
 					\WP_CLI::log( "Language '{$language_code}' for '{$plugin}' uninstalled." );
 				} elseif ( $count_files_removed ) {
 					\WP_CLI::log( "Language '{$language_code}' for '{$plugin}' partially uninstalled." );

src/Theme_Language_Command.php

@@ -570,6 +570,7 @@ public function uninstall( $args, $assoc_args ) {
 				if ( $count_files_to_remove === $count_files_removed ) {
 					$result['status'] = 'uninstalled';
 					++$successes;
+					$this->clear_translation_files_cache( $dir );
 					\WP_CLI::log( "Language '{$language_code}' for '{$theme}' uninstalled." );
 				} elseif ( $count_files_removed ) {
 					\WP_CLI::log( "Language '{$language_code}' for '{$theme}' partially uninstalled." );

src/WP_CLI/CommandWithTranslation.php

@@ -439,4 +439,17 @@ protected function get_all_languages( $slug = null ) {
 	protected function get_formatter( &$assoc_args ) {
 		return new Formatter( $assoc_args, $this->obj_fields, $this->obj_type );
 	}
+
+	/**
+	 * Clears the translation files cache for a given directory.
+	 *
+	 * @param string $dir The directory to clear the cache for.
+	 */
+	protected function clear_translation_files_cache( $dir ) {
+		// As of WP 6.5, the presence of .mo and .l10n.php files is cached.
+		if ( function_exists( 'wp_cache_delete' ) ) {
+			$path = rtrim( $dir, '/' ) . '/';
+			wp_cache_delete( md5( $path ), 'translation_files' );
+		}
+	}
 }