make-json: Add new --domain argument

README.md

@@ -150,7 +150,7 @@ if the source directory is detected as either a plugin or theme.
 Extract JavaScript strings from PO files and add them to individual JSON files.
 
 ~~~
-wp i18n make-json <source> [<destination>] [--purge] [--update-mo-files] [--pretty-print] [--use-map=<paths_or_maps>]
+wp i18n make-json <source> [<destination>] [--domain=<domain>] [--purge] [--update-mo-files] [--pretty-print] [--use-map=<paths_or_maps>]
 ~~~
 
 For JavaScript internationalization purposes, WordPress requires translations to be split up into
@@ -167,6 +167,9 @@ about WordPress JavaScript internationalization.
 	[<destination>]
 		Path to the destination directory for the resulting JSON files. Defaults to the source directory.
 
+	[--domain=<domain>]
+		Text domain to use for the JSON file name. Overrides the default one extracted from the PO file.
+
 	[--purge]
 		Whether to purge the strings that were extracted from the original source file. Defaults to true, use `--no-purge` to skip the removal.
 

features/makejson.feature

@@ -951,3 +951,37 @@ Feature: Split PO files into JSON files.
     And the return code should be 0
     And the foo-theme/foo-theme-de_DE-557240f2080a0894dbd39f5c2f559bf8.json file should exist
 
+  Scenario: Allows overriding the text domain to use for the file name
+    Given an empty foo-theme directory
+    And a foo-theme/de_DE.po file:
+      """
+      # Copyright (C) 2018 Foo Theme
+      # This file is distributed under the same license as the Foo Plugin package.
+      msgid ""
+      msgstr ""
+      "Project-Id-Version: Foo Plugin\n"
+      "Report-Msgid-Bugs-To: https://wordpress.org/support/plugin/foo-plugin\n"
+      "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
+      "Language-Team: LANGUAGE <[email protected]>\n"
+      "Language: de_DE\n"
+      "MIME-Version: 1.0\n"
+      "Content-Type: text/plain; charset=UTF-8\n"
+      "Content-Transfer-Encoding: 8bit\n"
+      "POT-Creation-Date: 2018-05-02T22:06:24+00:00\n"
+      "PO-Revision-Date: 2018-05-02T22:06:24+00:00\n"
+      "X-Domain: foo-theme\n"
+      "Plural-Forms: nplurals=2; plural=(n != 1);\n"
+
+      #: foo-theme.js:15
+      msgid "Foo Theme"
+      msgstr "Foo Theme"
+      """
+
+    When I run `wp i18n make-json foo-theme --domain=my-custom-domain`
+    Then STDOUT should contain:
+      """
+      Success: Created 1 file.
+      """
+    And the return code should be 0
+    And the foo-theme/my-custom-domain-de_DE-557240f2080a0894dbd39f5c2f559bf8.json file should exist
+

src/MakeJsonCommand.php

@@ -38,6 +38,9 @@ class MakeJsonCommand extends WP_CLI_Command {
 	 * [<destination>]
 	 * : Path to the destination directory for the resulting JSON files. Defaults to the source directory.
 	 *
+	 * [--domain=<domain>]
+	 * : Text domain to use for the JSON file name. Overrides the default one extracted from the PO file.
+	 *
 	 * [--purge]
 	 * : Whether to purge the strings that were extracted from the original source file. Defaults to true, use `--no-purge` to skip the removal.
 	 *
@@ -78,6 +81,7 @@ public function __invoke( $args, $assoc_args ) {
 		$purge           = Utils\get_flag_value( $assoc_args, 'purge', true );
 		$update_mo_files = Utils\get_flag_value( $assoc_args, 'update-mo-files', true );
 		$map_paths       = Utils\get_flag_value( $assoc_args, 'use-map', false );
+		$domain          = Utils\get_flag_value( $assoc_args, 'domain', '' );
 
 		if ( Utils\get_flag_value( $assoc_args, 'pretty-print', false ) ) {
 			$this->json_options |= JSON_PRETTY_PRINT;
@@ -115,7 +119,7 @@ public function __invoke( $args, $assoc_args ) {
 		/** @var DirectoryIterator $file */
 		foreach ( $files as $file ) {
 			if ( $file->isFile() && $file->isReadable() && 'po' === $file->getExtension() ) {
-				$result        = $this->make_json( $file->getRealPath(), $destination, $map );
+				$result        = $this->make_json( $file->getRealPath(), $destination, $map, $domain );
 				$result_count += count( $result );
 
 				if ( $purge ) {
@@ -222,10 +226,11 @@ static function ( $value ) {
 	 *
 	 * @param string     $source_file Path to the source file.
 	 * @param string     $destination Path to the destination directory.
-	 * @param array|null $map               Source to build file mapping.
+	 * @param array|null $map         Source to build file mapping.
+	 * @param string     $domain      Override text domain to use.
 	 * @return array     List of created JSON files.
 	 */
-	protected function make_json( $source_file, $destination, $map ) {
+	protected function make_json( $source_file, $destination, $map, $domain ) {
 		/** @var Translations[] $mapping */
 		$mapping      = [];
 		$translations = new Translations();
@@ -235,7 +240,7 @@ protected function make_json( $source_file, $destination, $map ) {
 
 		$base_file_name = basename( $source_file, '.po' );
 
-		$domain = $translations->getDomain();
+		$domain = ( ! empty( $domain ) ) ? $domain : $translations->getDomain();
 
 		if ( $domain && 0 !== strpos( $base_file_name, $domain ) ) {
 			$base_file_name = "{$domain}-{$base_file_name}";