CConsoleApplication

protected function createCommandRunner()
{
    return new CConsoleCommandRunner;
}

public function displayError($code,$message,$file,$line)
{
    echo "PHP Error[$code]: $message\n";
    echo "    in file $file at line $line\n";
    $trace=debug_backtrace();
    // skip the first 4 stacks as they do not tell the error position
    if(count($trace)>4)
        $trace=array_slice($trace,4);
    foreach($trace as $i=>$t)
    {
        if(!isset($t['file']))
            $t['file']='unknown';
        if(!isset($t['line']))
            $t['line']=0;
        if(!isset($t['function']))
            $t['function']='unknown';
        echo "#$i{$t['file']}({$t['line']}): ";
        if(isset($t['object']) && is_object($t['object']))
            echo get_class($t['object']).'->';
        echo "{$t['function']}()\n";
    }
}

public function displayException($exception)
{
    echo $exception;
}

public function getCommand()
{
    return $this->getCommandRunner()->getCommand();
}

public function getCommandPath()
{
    $applicationCommandPath = $this->getBasePath().DIRECTORY_SEPARATOR.'commands';
    if($this->_commandPath===null && file_exists($applicationCommandPath))
        $this->setCommandPath($applicationCommandPath);
    return $this->_commandPath;
}

public function getCommandRunner()
{
    return $this->_runner;
}

protected function init()
{
    parent::init();
    if(empty($_SERVER['argv']))
        die('This script must be run from the command line.');
    $this->_runner=$this->createCommandRunner();
    $this->_runner->commands=$this->commandMap;
    $this->_runner->addCommands($this->getCommandPath());
}

public function processRequest()
{
    $exitCode=$this->_runner->run($_SERVER['argv']);
    if(is_int($exitCode))
        $this->end($exitCode);
}

public function setCommand($value)
{
    $this->getCommandRunner()->setCommand($value);
}

public function setCommandPath($value)
{
    if(($this->_commandPath=realpath($value))===false || !is_dir($this->_commandPath))
        throw new CException(Yii::t('yii','The command path "{path}" is not a valid directory.',
            array('{path}'=>$value)));
}