Add Configure::dump().

lib/Cake/Core/Configure.php

@@ -278,6 +278,28 @@ public static function load($key, $config = 'default', $merge = true) {
 		return self::write($values);
 	}
 
+/**
+ * Dump data currently in Configure into $filename.  The serialization format
+ * is decided by the config reader attached as $config.  For example, if the
+ * 'default' adapter is a PhpReader, the generated file will be a PHP configuration
+ * file loadable by the PhpReader.
+ *
+ * @param string $filename The filename to save content into.
+ * @param string $config The name of the configured adapter to dump data with.
+ * @return void
+ * @throws ConfigureException if the adapter does not implement a `dump` method.
+ */
+	public static function dump($filename, $config = 'default') {
+		if (empty(self::$_readers[$config])) {
+			throw new ConfigureException(__d('cake', 'There is no "%s" adapter.', $config));
+		}
+		if (!method_exists(self::$_readers[$config], 'dump')) {
+			throw new ConfigureException(__d('cake', 'The "%s" adapter, does not have a dump() method.', $config));
+		}
+		$content = self::$_readers[$config]->dump(self::$_values);
+		return file_put_contents($filename, $content);
+	}
+
 /**
  * Used to determine the current version of CakePHP.
  *

lib/Cake/Test/Case/Core/ConfigureTest.php

@@ -362,4 +362,28 @@ public function testClear() {
 		$this->assertNull(Configure::read('debug'));
 		$this->assertNull(Configure::read('test'));
 	}
+
+/**
+ * @expectedException ConfigureException
+ */
+	public function testDumpNoAdapter() {
+		Configure::dump(TMP . 'test.php', 'does_not_exist');
+	}
+
+/**
+ * test dump integrated with the PhpReader.
+ *
+ * @return void
+ */
+	public function testDump() {
+		Configure::config('test_reader', new PhpReader(TMP));
+
+		$result = Configure::dump(TMP . 'config_test.php', 'test_reader');
+		$this->assertTrue($result > 0);
+		$result = file_get_contents(TMP . 'config_test.php');
+		$this->assertContains('<?php', $result);
+		$this->assertContains('$config = ', $result);
+		@unlink(TMP . 'config_test.php');
+	}
+
 }