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<?php
/**
* CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
* @link https://cakephp.org CakePHP(tm) Project
* @since 2.0.0
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
namespace Cake\Console;
use Cake\Console\Exception\ConsoleException;
use Cake\Utility\Text;
use SimpleXMLElement;
/**
* HelpFormatter formats help for console shells. Can format to either
* text or XML formats. Uses ConsoleOptionParser methods to generate help.
*
* Generally not directly used. Using $parser->help($command, 'xml'); is usually
* how you would access help. Or via the `--help=xml` option on the command line.
*
* Xml output is useful for integration with other tools like IDE's or other build tools.
*/
class HelpFormatter
{
/**
* The maximum number of arguments shown when generating usage.
*
* @var int
*/
protected $_maxArgs = 6;
/**
* The maximum number of options shown when generating usage.
*
* @var int
*/
protected $_maxOptions = 6;
/**
* Option parser.
*
* @var \Cake\Console\ConsoleOptionParser
*/
protected $_parser;
/**
* Alias to display in the output.
*
* @var string
*/
protected $_alias = 'cake';
/**
* Build the help formatter for an OptionParser
*
* @param \Cake\Console\ConsoleOptionParser $parser The option parser help is being generated for.
*/
public function __construct(ConsoleOptionParser $parser)
{
$this->_parser = $parser;
}
/**
* Set the alias
*
* @param string $alias The alias
* @return void
* @throws \Cake\Console\Exception\ConsoleException When alias is not a string.
*/
public function setAlias($alias)
{
if (is_string($alias)) {
$this->_alias = $alias;
} else {
throw new ConsoleException('Alias must be of type string.');
}
}
/**
* Get the help as formatted text suitable for output on the command line.
*
* @param int $width The width of the help output.
* @return string
*/
public function text($width = 72)
{
$parser = $this->_parser;
$out = [];
$description = $parser->getDescription();
if (!empty($description)) {
$out[] = Text::wrap($description, $width);
$out[] = '';
}
$out[] = '<info>Usage:</info>';
$out[] = $this->_generateUsage();
$out[] = '';
$subcommands = $parser->subcommands();
if (!empty($subcommands)) {
$out[] = '<info>Subcommands:</info>';
$out[] = '';
$max = $this->_getMaxLength($subcommands) + 2;
foreach ($subcommands as $command) {
$out[] = Text::wrapBlock($command->help($max), [
'width' => $width,
'indent' => str_repeat(' ', $max),
'indentAt' => 1
]);
}
$out[] = '';
$out[] = sprintf('To see help on a subcommand use <info>`' . $this->_alias . ' %s [subcommand] --help`</info>', $parser->getCommand());
$out[] = '';
}
$options = $parser->options();
if (!empty($options)) {
$max = $this->_getMaxLength($options) + 8;
$out[] = '<info>Options:</info>';
$out[] = '';
foreach ($options as $option) {
$out[] = Text::wrapBlock($option->help($max), [
'width' => $width,
'indent' => str_repeat(' ', $max),
'indentAt' => 1
]);
}
$out[] = '';
}
$arguments = $parser->arguments();
if (!empty($arguments)) {
$max = $this->_getMaxLength($arguments) + 2;
$out[] = '<info>Arguments:</info>';
$out[] = '';
foreach ($arguments as $argument) {
$out[] = Text::wrapBlock($argument->help($max), [
'width' => $width,
'indent' => str_repeat(' ', $max),
'indentAt' => 1
]);
}
$out[] = '';
}
$epilog = $parser->getEpilog();
if (!empty($epilog)) {
$out[] = Text::wrap($epilog, $width);
$out[] = '';
}
return implode("\n", $out);
}
/**
* Generate the usage for a shell based on its arguments and options.
* Usage strings favor short options over the long ones. and optional args will
* be indicated with []
*
* @return string
*/
protected function _generateUsage()
{
$usage = [$this->_alias . ' ' . $this->_parser->getCommand()];
$subcommands = $this->_parser->subcommands();
if (!empty($subcommands)) {
$usage[] = '[subcommand]';
}
$options = [];
foreach ($this->_parser->options() as $option) {
$options[] = $option->usage();
}
if (count($options) > $this->_maxOptions) {
$options = ['[options]'];
}
$usage = array_merge($usage, $options);
$args = [];
foreach ($this->_parser->arguments() as $argument) {
$args[] = $argument->usage();
}
if (count($args) > $this->_maxArgs) {
$args = ['[arguments]'];
}
$usage = array_merge($usage, $args);
return implode(' ', $usage);
}
/**
* Iterate over a collection and find the longest named thing.
*
* @param array $collection The collection to find a max length of.
* @return int
*/
protected function _getMaxLength($collection)
{
$max = 0;
foreach ($collection as $item) {
$max = (strlen($item->name()) > $max) ? strlen($item->name()) : $max;
}
return $max;
}
/**
* Get the help as an xml string.
*
* @param bool $string Return the SimpleXml object or a string. Defaults to true.
* @return string|\SimpleXMLElement See $string
*/
public function xml($string = true)
{
$parser = $this->_parser;
$xml = new SimpleXMLElement('<shell></shell>');
$xml->addChild('command', $parser->getCommand());
$xml->addChild('description', $parser->getDescription());
$subcommands = $xml->addChild('subcommands');
foreach ($parser->subcommands() as $command) {
$command->xml($subcommands);
}
$options = $xml->addChild('options');
foreach ($parser->options() as $option) {
$option->xml($options);
}
$arguments = $xml->addChild('arguments');
foreach ($parser->arguments() as $argument) {
$argument->xml($arguments);
}
$xml->addChild('epilog', $parser->getEpilog());
return $string ? $xml->asXML() : $xml;
}
}