Making xml help work.

Need to update tests.

cake/console/libs/console_option_parser.php

@@ -470,7 +470,7 @@ public function parse($argv, $command = null) {
  * @param int $width The width to format user content to. Defaults to 72
  * @return string Generated help.
  */
-	public function help($subcommand = null, $width = 72) {
+	public function help($subcommand = null, $format = 'text', $width = 72) {
 		if (
 			isset($this->_subcommands[$subcommand]) &&
 			$this->_subcommands[$subcommand]->parser() instanceof self
@@ -480,7 +480,11 @@ public function help($subcommand = null, $width = 72) {
 			return $subparser->help();
 		}
 		$formatter = new HelpFormatter($this);
-		return $formatter->text($width);
+		if ($format == 'text' || $format === true) {
+			return $formatter->text($width);
+		} elseif ($format == 'xml') {
+			return $formatter->xml();
+		}
 	}
 
 /**

cake/console/shells/shell.php

@@ -338,12 +338,20 @@ public function runCommand($command, $argv) {
 		list($this->params, $this->args) = $this->OptionParser->parse($argv, $command);
 		$this->command = $command;
 
+		if (!empty($this->params['help'])) {
+			$isXml = false;
+			$format = 'text';
+			if (!empty($this->args[0]) && $this->args[0] == 'xml')  {
+				$format = 'xml';
+			} else {
+				$this->_welcome();
+			}
+			return $this->out($this->OptionParser->help($command, $format));
+		}
+
 		if (($isTask || $isMethod || $isMain) && $command !== 'execute' ) {
 			$this->startup();
 		}
-		if (!empty($this->params['help'])) {
-			return $this->out($this->OptionParser->help($command));
-		}
 
 		if ($isTask) {
 			$command = Inflector::camelize($command);