CHelpCommand.php
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<?php
/**
* CHelpCommand class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CHelpCommand represents a console help command.
*
* CHelpCommand displays the available command list or the help instructions
* about a specific command.
*
* To use this command, enter the following on the command line:
* <pre>
* php path/to/entry_script.php help [command name]
* </pre>
* In the above, if the command name is not provided, it will display all
* available commands.
*
* @property string $help The command description.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.console
* @since 1.0
*/
class CHelpCommand extends CConsoleCommand
{
/**
* Execute the action.
* @param array $args command line parameters specific for this command
* @return integer non zero application exit code after printing help
*/
public function run($args)
{
$runner=$this->getCommandRunner();
$commands=$runner->commands;
if(isset($args[0]))
$name=strtolower($args[0]);
if(!isset($args[0]) || !isset($commands[$name]))
{
if(!empty($commands))
{
echo "Yii command runner (based on Yii v".Yii::getVersion().")\n";
echo "Usage: ".$runner->getScriptName()." <command-name> [parameters...]\n";
echo "\nThe following commands are available:\n";
$commandNames=array_keys($commands);
sort($commandNames);
echo ' - '.implode("\n - ",$commandNames);
echo "\n\nTo see individual command help, use the following:\n";
echo " ".$runner->getScriptName()." help <command-name>\n";
}
else
{
echo "No available commands.\n";
echo "Please define them under the following directory:\n";
echo "\t".Yii::app()->getCommandPath()."\n";
}
}
else
echo $runner->createCommand($name)->getHelp();
return 1;
}
/**
* Provides the command description.
* @return string the command description.
*/
public function getHelp()
{
return parent::getHelp().' [command-name]';
}
}