public function doValidate($validator, $values)
{
preg_match(ForgeValidatorGitHubUrl::PATTERN, $values['url'], $parts);
$url = sprintf('http://github.com/%s/%s/', $parts[3], $parts[4]);
if (!ForgeToolkit::isUrlAccessible($url)) {
throw new sfValidatorError($validator, sprintf('Could not access <a href="%s">GitHub URL</a> (404)', $url));
}
$this->gitHubUser = $parts[3];
$this->gitHubRepository = $parts[4];
return $values;
}