Bring i18n functionality up to date

.gitignore

@@ -4,8 +4,6 @@ build-module
 build-style
 node_modules
 gutenberg.zip
-languages/gutenberg.pot
-/languages/gutenberg-translations.php
 
 # Directories/files that may appear in your environment
 .DS_Store

babel.config.js

@@ -13,17 +13,5 @@ module.exports = function( api ) {
 				},
 			],
 		],
-		env: {
-			production: {
-				plugins: [
-					[
-						'@wordpress/babel-plugin-makepot',
-						{
-							output: 'languages/gutenberg.pot',
-						},
-					],
-				],
-			},
-		},
 	};
 };

bin/build-plugin-zip.sh

@@ -97,8 +97,6 @@ status "Installing dependencies... 📦"
 npm install
 status "Generating build... 👷‍♀️"
 npm run build
-status "Generating PHP file for wordpress.org to parse translations... 👷‍♂️"
-npx pot-to-php ./languages/gutenberg.pot ./languages/gutenberg-translations.php gutenberg
 
 # Temporarily modify `gutenberg.php` with production constants defined. Use a
 # temp file because `bin/generate-gutenberg-php.php` reads from `gutenberg.php`
@@ -118,8 +116,6 @@ zip -r gutenberg.zip \
 	post-content.php \
 	$vendor_scripts \
 	$build_files \
-	languages/gutenberg.pot \
-	languages/gutenberg-translations.php \
 	README.md
 
 # Reset `gutenberg.php`.

docs/designers-developers/developers/backward-compatibility/deprecations.md

@@ -21,6 +21,9 @@ The Gutenberg project's deprecation policy is intended to support backward compa
 - The PHP function `gutenberg_register_post_prepare_functions` has been removed.
 - The PHP function `gutenberg_silence_rest_errors` has been removed.
 - The PHP function `gutenberg_filter_post_type_labels` has been removed.
+- The PHP function `gutenberg_load_plugin_textdomain` has been removed.
+- The PHP function `gutenberg_get_jed_locale_data` has been removed.
+- The PHP function `gutenberg_load_locale_data` has been removed.
 
 ## 4.5.0
 - `Dropdown.refresh()` has been deprecated as the contained `Popover` is now automatically refreshed.

lib/client-assets.php

@@ -111,6 +111,16 @@ function register_tinymce_scripts() {
 function gutenberg_override_script( $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
 	wp_deregister_script( $handle );
 	wp_register_script( $handle, $src, $deps, $ver, $in_footer );
+
+	// `WP_Dependencies::set_translations` will fall over on itself if setting
+	// translations on the `wp-i18n` handle, since it internally adds `wp-i18n`
+	// as a dependency of itself, exhausting memory. The same applies for the
+	// polyfill script, which is a dependency _of_ `wp-i18n`.
+	//
+	// See: https://core.trac.wordpress.org/ticket/46089
+	if ( 'wp-i18n' !== $handle && 'wp-polyfill' !== $handle ) {
+		wp_set_script_translations( $handle, 'gutenberg' );
+	}
 }
 
 /**
@@ -963,14 +973,11 @@ function gutenberg_get_block_categories( $post ) {
 
 /**
  * Loads Gutenberg Locale Data.
+ *
+ * @deprecated 5.0.0
  */
 function gutenberg_load_locale_data() {
-	// Prepare Jed locale data.
-	$locale_data = gutenberg_get_jed_locale_data( 'gutenberg' );
-	wp_add_inline_script(
-		'wp-i18n',
-		'wp.i18n.setLocaleData( ' . json_encode( $locale_data ) . ' );'
-	);
+	_deprecated_function( __FUNCTION__, '5.0.0' );
 }
 
 /**
@@ -1151,8 +1158,6 @@ function gutenberg_editor_scripts_and_styles( $hook ) {
 		$initial_edits = null;
 	}
 
-	gutenberg_load_locale_data();
-
 	// Preload server-registered block schemas.
 	wp_add_inline_script(
 		'wp-blocks',
@@ -1414,7 +1419,6 @@ function gutenberg_editor_scripts_and_styles( $hook ) {
 function gutenberg_load_list_reusable_blocks( $hook ) {
 	$is_reusable_blocks_list_page = 'edit.php' === $hook && isset( $_GET['post_type'] ) && 'wp_block' === $_GET['post_type'];
 	if ( $is_reusable_blocks_list_page ) {
-		gutenberg_load_locale_data();
 		wp_enqueue_script( 'wp-list-reusable-blocks' );
 		wp_enqueue_style( 'wp-list-reusable-blocks' );
 	}

lib/i18n.php

@@ -13,12 +13,15 @@
  * Returns Jed-formatted localization data.
  *
  * @since 0.1.0
+ * @deprecated 5.0.0
  *
  * @param  string $domain Translation domain.
  *
  * @return array
  */
 function gutenberg_get_jed_locale_data( $domain ) {
+	_deprecated_function( __FUNCTION__, '5.0.0' );
+
 	$translations = get_translations_for_domain( $domain );
 
 	$locale = array(
@@ -43,12 +46,8 @@ function gutenberg_get_jed_locale_data( $domain ) {
  * Load plugin text domain for translations.
  *
  * @since 0.1.0
+ * @deprecated 5.0.0
  */
 function gutenberg_load_plugin_textdomain() {
-	load_plugin_textdomain(
-		'gutenberg',
-		false,
-		plugin_basename( gutenberg_dir_path() ) . '/languages/'
-	);
+	_deprecated_function( __FUNCTION__, '5.0.0' );
 }
-add_action( 'plugins_loaded', 'gutenberg_load_plugin_textdomain' );