Fixes #722.

framework/yii/console/controllers/MessageController.php

@@ -98,7 +98,7 @@ class MessageController extends Controller
 
 		$messages = array();
 		foreach ($files as $file) {
-			$messages = array_merge($messages, $this->extractMessages($file, $config['translator']));
+			$messages = array_merge_recursive($messages, $this->extractMessages($file, $config['translator']));
 		}
 
 		foreach ($config['languages'] as $language) {

framework/yii/messages/config.php

+<?php
+
+return array(
+	// string, required, root directory of all source files
+	'sourcePath' => __DIR__ . '/..',
+	// string, required, root directory containing message translations.
+	'messagePath' => __DIR__,
+	// array, required, list of language codes that the extracted messages
+	// should be translated to. For example, array('zh_cn', 'de').
+	'languages' => array('de'),
+	// string, the name of the function for translating messages.
+	// Defaults to 'Yii::t'. This is used as a mark to find the messages to be
+	// translated. You may use a string for single function name or an array for
+	// multiple function names.
+	'translator' => 'Yii::t',
+	// boolean, whether to sort messages by keys when merging new messages
+	// with the existing ones. Defaults to false, which means the new (untranslated)
+	// messages will be separated from the old (translated) ones.
+	'sort' => false,
+	// boolean, whether the message file should be overwritten with the merged messages
+	'overwrite' => true,
+	// boolean, whether to remove messages that no longer appear in the source code.
+	// Defaults to false, which means each of these messages will be enclosed with a pair of '@@' marks.
+	'removeUnused' => false,
+	// array, list of patterns that specify which files/directories should be processed.
+	// If empty or not set, all files/directories will be processed.
+	// A path matches a pattern if it contains the pattern string at its end. For example,
+	// '/a/b' will match all files and directories ending with '/a/b';
+	// and the '.svn' will match all files and directories whose name ends with '.svn'.
+	// Note, the '/' characters in a pattern matches both '/' and '\'.
+	// If a file/directory matches both a pattern in "only" and "except", it will NOT be processed.
+	'only' => array('.php'),
+	// array, list of patterns that specify which files/directories should NOT be processed.
+	// If empty or not set, all files/directories will be processed.
+	// Please refer to "only" for details about the patterns.
+	'except' => array(
+		'.svn',
+		'.git',
+		'.gitignore',
+		'.gitkeep',
+		'.hgignore',
+		'.hgkeep',
+		'/messages',
+	),
+);