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

@@ -3,17 +3,5 @@ module.exports = function( api ) {
 
 	return {
 		presets: [ '@wordpress/babel-preset-default' ],
-		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

@@ -2,6 +2,12 @@
 
 The Gutenberg project's deprecation policy is intended to support backward compatibility for releases, when possible. The current deprecations are listed below and are grouped by _the version at which they will be removed completely_. If your plugin depends on these behaviors, you must update to the recommended alternative before the noted version.
 
+## 5.4.0
+
+- 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.
+
 ## 5.3.0
 
 - The PHP function `gutenberg_redirect_to_classic_editor_when_saving_posts` has been removed.

gutenberg.php

@@ -5,6 +5,7 @@
  * Description: Printing since 1440. This is the development plugin for the new block editor in core.
  * Version: 5.1.1
  * Author: Gutenberg Team
+ * Text Domain: gutenberg
  *
  * @package gutenberg
  */

lib/client-assets.php

@@ -83,8 +83,71 @@ function gutenberg_override_script( $handle, $src, $deps = array(), $ver = false
 	} else {
 		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, 'default' );
+	}
 }
 
+/**
+ * Filters the default translation file load behavior to load the Gutenberg
+ * plugin translation file, if available.
+ *
+ * @param string|false $file   Path to the translation file to load. False if
+ *                             there isn't one.
+ * @param string       $handle Name of the script to register a translation
+ *                             domain to.
+ *
+ * @return string|false Filtered path to the Gutenberg translation file, if
+ *                      available.
+ */
+function gutenberg_override_translation_file( $file, $handle ) {
+	if ( ! $file ) {
+		return $file;
+	}
+
+	// Only override script handles generated from the Gutenberg plugin.
+	$packages_dependencies = include dirname( __FILE__ ) . '/packages-dependencies.php';
+	if ( ! isset( $packages_dependencies[ $handle ] ) ) {
+		return $file;
+	}
+
+	/*
+	 * The default file will be in the plugins language directory, omitting the
+	 * domain since Gutenberg assigns the script translations as the default.
+	 *
+	 * Example: /www/wp-content/languages/plugins/de_DE-07d88e6a803e01276b9bfcc1203e862e.json
+	 *
+	 * The logic of `load_script_textdomain` is such that it will assume to
+	 * search in the plugins language directory, since the assigned source of
+	 * the overridden Gutenberg script originates in the plugins directory.
+	 *
+	 * The plugin translation files each begin with the slug of the plugin, so
+	 * it's a simple matter of prepending the Gutenberg plugin slug.
+	 */
+	$path_parts              = pathinfo( $file );
+	$plugin_translation_file = (
+		$path_parts['dirname'] .
+		'/gutenberg-' .
+		$path_parts['basename']
+	);
+
+	if ( ! is_readable( $plugin_translation_file ) ) {
+		return $file;
+	}
+
+	return $plugin_translation_file;
+}
+add_filter( 'load_script_translation_file', 'gutenberg_override_translation_file', 10, 2 );
+
 /**
  * Registers a style according to `wp_register_style`. Honors this request by
  * deregistering any style by the same handler before registration.
@@ -506,14 +569,11 @@ function gutenberg_get_autosave_newer_than_post_save( $post ) {
 
 /**
  * Loads Gutenberg Locale Data.
+ *
+ * @deprecated 5.2.0
  */
 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__, '5.2.0' );
 }
 
 /**
@@ -701,8 +761,6 @@ 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',

lib/i18n.php

@@ -13,12 +13,15 @@
  * Returns Jed-formatted localization data.
  *
  * @since 0.1.0
+ * @deprecated 5.2.0
  *
  * @param  string $domain Translation domain.
  *
  * @return array
  */
 function gutenberg_get_jed_locale_data( $domain ) {
+	_deprecated_function( __FUNCTION__, '5.2.0' );
+
 	$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 5.2.0
  */
 function gutenberg_load_plugin_textdomain() {
-	load_plugin_textdomain(
-		'gutenberg',
-		false,
-		plugin_basename( gutenberg_dir_path() ) . '/languages/'
-	);
+	_deprecated_function( __FUNCTION__, '5.2.0' );
 }
-add_action( 'plugins_loaded', 'gutenberg_load_plugin_textdomain' );

phpcs.xml.dist

@@ -32,7 +32,6 @@
 	<exclude-pattern>./vendor</exclude-pattern>
 
 	<!-- Exclude generated files -->
-	<exclude-pattern>./languages/gutenberg-translations.php</exclude-pattern>
 	<exclude-pattern>./packages/block-serialization-spec-parser/parser.php</exclude-pattern>
 
 	<rule ref="PHPCompatibility.PHP.NewKeywords.t_namespaceFound">

phpunit/class-override-script-test.php

@@ -24,6 +24,23 @@ function tearDown() {
 		wp_deregister_script( 'gutenberg-dummy-script' );
 	}
 
+	/**
+	 * Tests that script is localized.
+	 */
+	function test_localizes_script() {
+		gutenberg_override_script(
+			'gutenberg-dummy-script',
+			'https://example.com/',
+			array( 'dependency' ),
+			'version',
+			false
+		);
+
+		global $wp_scripts;
+		$script = $wp_scripts->query( 'gutenberg-dummy-script', 'registered' );
+		$this->assertEquals( array( 'dependency', 'wp-i18n' ), $script->deps );
+	}
+
 	/**
 	 * Tests that script properties are overridden.
 	 */
@@ -39,7 +56,7 @@ function test_replaces_registered_properties() {
 		global $wp_scripts;
 		$script = $wp_scripts->query( 'gutenberg-dummy-script', 'registered' );
 		$this->assertEquals( 'https://example.com/updated', $script->src );
-		$this->assertEquals( array( 'updated-dependency' ), $script->deps );
+		$this->assertEquals( array( 'updated-dependency', 'wp-i18n' ), $script->deps );
 		$this->assertEquals( 'updated-version', $script->ver );
 		$this->assertEquals( 1, $script->extra['group'] );
 	}
@@ -59,7 +76,7 @@ function test_registers_new_script() {
 		global $wp_scripts;
 		$script = $wp_scripts->query( 'gutenberg-second-dummy-script', 'registered' );
 		$this->assertEquals( 'https://example.com/', $script->src );
-		$this->assertEquals( array( 'dependency' ), $script->deps );
+		$this->assertEquals( array( 'dependency', 'wp-i18n' ), $script->deps );
 		$this->assertEquals( 'version', $script->ver );
 		$this->assertEquals( 1, $script->extra['group'] );
 	}